./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ --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 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f --- 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-dbf71c6-m [2022-10-17 10:26:52,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:26:52,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:26:52,080 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:26:52,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:26:52,086 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:26:52,088 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:26:52,091 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:26:52,093 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:26:52,094 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:26:52,096 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:26:52,097 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:26:52,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:26:52,100 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:26:52,101 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:26:52,103 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:26:52,104 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:26:52,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:26:52,108 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:26:52,110 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:26:52,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:26:52,121 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:26:52,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:26:52,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:26:52,128 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:26:52,129 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:26:52,129 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:26:52,130 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:26:52,131 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:26:52,132 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:26:52,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:26:52,141 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:26:52,142 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:26:52,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:26:52,144 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:26:52,145 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:26:52,145 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:26:52,146 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:26:52,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:26:52,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:26:52,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:26:52,149 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:26:52,178 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:26:52,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:26:52,179 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:26:52,179 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:26:52,180 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:26:52,180 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:26:52,181 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:26:52,181 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:26:52,182 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:26:52,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:26:52,182 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:26:52,183 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:26:52,183 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:26:52,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:26:52,184 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:26:52,184 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:26:52,185 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:26:52,191 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:26:52,191 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:26:52,192 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:26:52,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:26:52,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:26:52,192 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:26:52,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:26:52,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:26:52,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:26:52,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:26:52,194 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:26:52,194 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:26:52,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:26:52,195 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:26:52,195 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:26:52,195 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:26:52,196 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_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f [2022-10-17 10:26:52,447 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:26:52,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:26:52,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:26:52,473 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:26:52,474 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:26:52,475 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2022-10-17 10:26:52,549 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/data/f95c96f07/aadfd1aab74b4ed9998340a9d6d7ee7f/FLAG53775c1b5 [2022-10-17 10:26:52,990 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:26:52,991 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2022-10-17 10:26:53,000 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/data/f95c96f07/aadfd1aab74b4ed9998340a9d6d7ee7f/FLAG53775c1b5 [2022-10-17 10:26:53,354 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/data/f95c96f07/aadfd1aab74b4ed9998340a9d6d7ee7f [2022-10-17 10:26:53,356 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:26:53,358 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:26:53,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:26:53,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:26:53,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:26:53,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:26:53" (1/1) ... [2022-10-17 10:26:53,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21afd3b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:53, skipping insertion in model container [2022-10-17 10:26:53,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:26:53" (1/1) ... [2022-10-17 10:26:53,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:26:53,405 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:26:53,598 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2022-10-17 10:26:53,678 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:26:53,687 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:26:53,703 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2022-10-17 10:26:53,776 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:26:53,792 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:26:53,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:53 WrapperNode [2022-10-17 10:26:53,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:26:53,794 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:26:53,794 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:26:53,794 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:26:53,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:53" (1/1) ... [2022-10-17 10:26:53,817 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:53" (1/1) ... [2022-10-17 10:26:53,852 INFO L138 Inliner]: procedures = 17, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 213 [2022-10-17 10:26:53,852 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:26:53,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:26:53,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:26:53,854 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:26:53,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:53" (1/1) ... [2022-10-17 10:26:53,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:53" (1/1) ... [2022-10-17 10:26:53,877 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:53" (1/1) ... [2022-10-17 10:26:53,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:53" (1/1) ... [2022-10-17 10:26:53,902 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:53" (1/1) ... [2022-10-17 10:26:53,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:53" (1/1) ... [2022-10-17 10:26:53,928 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:53" (1/1) ... [2022-10-17 10:26:53,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:53" (1/1) ... [2022-10-17 10:26:53,936 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:26:53,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:26:53,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:26:53,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:26:53,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:53" (1/1) ... [2022-10-17 10:26:53,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:26:53,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:26:53,999 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:26:54,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:26:54,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:26:54,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:26:54,057 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-10-17 10:26:54,058 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-10-17 10:26:54,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:26:54,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:26:54,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-17 10:26:54,060 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-17 10:26:54,169 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:26:54,172 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:26:54,797 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:26:54,806 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:26:54,818 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 10:26:54,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:26:54 BoogieIcfgContainer [2022-10-17 10:26:54,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:26:54,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:26:54,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:26:54,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:26:54,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:26:53" (1/3) ... [2022-10-17 10:26:54,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a22751a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:26:54, skipping insertion in model container [2022-10-17 10:26:54,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:53" (2/3) ... [2022-10-17 10:26:54,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a22751a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:26:54, skipping insertion in model container [2022-10-17 10:26:54,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:26:54" (3/3) ... [2022-10-17 10:26:54,844 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-3a.c.cil.c [2022-10-17 10:26:54,863 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:26:54,863 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:26:54,935 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:26:54,942 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;@487c3a83, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:26:54,943 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:26:54,950 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 93 states have (on average 1.7204301075268817) internal successors, (160), 96 states have internal predecessors, (160), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-10-17 10:26:54,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-17 10:26:54,970 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:26:54,970 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:26:54,971 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:26:54,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:26:54,976 INFO L85 PathProgramCache]: Analyzing trace with hash 814386124, now seen corresponding path program 1 times [2022-10-17 10:26:54,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:26:54,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694708606] [2022-10-17 10:26:54,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:54,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:26:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:55,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:26:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:55,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:26:55,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:55,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:26:55,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 10:26:55,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:26:55,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694708606] [2022-10-17 10:26:55,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694708606] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:26:55,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:26:55,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:26:55,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064644455] [2022-10-17 10:26:55,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:26:55,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:26:55,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:26:55,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:26:55,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:26:55,497 INFO L87 Difference]: Start difference. First operand has 106 states, 93 states have (on average 1.7204301075268817) internal successors, (160), 96 states have internal predecessors, (160), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:26:55,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:26:55,751 INFO L93 Difference]: Finished difference Result 276 states and 481 transitions. [2022-10-17 10:26:55,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:26:55,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 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 37 [2022-10-17 10:26:55,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:26:55,773 INFO L225 Difference]: With dead ends: 276 [2022-10-17 10:26:55,783 INFO L226 Difference]: Without dead ends: 165 [2022-10-17 10:26:55,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:26:55,799 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 110 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:26:55,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 419 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:26:55,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-10-17 10:26:55,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 147. [2022-10-17 10:26:55,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 132 states have (on average 1.5) internal successors, (198), 134 states have internal predecessors, (198), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-10-17 10:26:55,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 221 transitions. [2022-10-17 10:26:55,866 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 221 transitions. Word has length 37 [2022-10-17 10:26:55,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:26:55,867 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 221 transitions. [2022-10-17 10:26:55,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:26:55,868 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 221 transitions. [2022-10-17 10:26:55,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-10-17 10:26:55,871 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:26:55,872 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:26:55,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:26:55,872 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:26:55,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:26:55,874 INFO L85 PathProgramCache]: Analyzing trace with hash -2116308935, now seen corresponding path program 1 times [2022-10-17 10:26:55,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:26:55,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909059331] [2022-10-17 10:26:55,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:55,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:26:55,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:56,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:26:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:56,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:26:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:56,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:26:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 10:26:56,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:26:56,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909059331] [2022-10-17 10:26:56,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909059331] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:26:56,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:26:56,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:26:56,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047349659] [2022-10-17 10:26:56,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:26:56,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:26:56,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:26:56,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:26:56,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:26:56,041 INFO L87 Difference]: Start difference. First operand 147 states and 221 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:26:56,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:26:56,200 INFO L93 Difference]: Finished difference Result 275 states and 414 transitions. [2022-10-17 10:26:56,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:26:56,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 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 39 [2022-10-17 10:26:56,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:26:56,213 INFO L225 Difference]: With dead ends: 275 [2022-10-17 10:26:56,215 INFO L226 Difference]: Without dead ends: 236 [2022-10-17 10:26:56,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:26:56,221 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 102 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:26:56,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 436 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:26:56,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-10-17 10:26:56,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 219. [2022-10-17 10:26:56,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 198 states have (on average 1.4595959595959596) internal successors, (289), 201 states have internal predecessors, (289), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-10-17 10:26:56,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 323 transitions. [2022-10-17 10:26:56,293 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 323 transitions. Word has length 39 [2022-10-17 10:26:56,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:26:56,295 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 323 transitions. [2022-10-17 10:26:56,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:26:56,297 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 323 transitions. [2022-10-17 10:26:56,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-10-17 10:26:56,302 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:26:56,302 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:26:56,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:26:56,303 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:26:56,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:26:56,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1123536244, now seen corresponding path program 1 times [2022-10-17 10:26:56,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:26:56,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325205555] [2022-10-17 10:26:56,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:56,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:26:56,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:56,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:26:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:56,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:26:56,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:56,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:26:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:56,521 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 10:26:56,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:26:56,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325205555] [2022-10-17 10:26:56,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325205555] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:26:56,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:26:56,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:26:56,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386291467] [2022-10-17 10:26:56,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:26:56,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:26:56,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:26:56,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:26:56,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:26:56,525 INFO L87 Difference]: Start difference. First operand 219 states and 323 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:26:56,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:26:56,664 INFO L93 Difference]: Finished difference Result 353 states and 525 transitions. [2022-10-17 10:26:56,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:26:56,669 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 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 40 [2022-10-17 10:26:56,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:26:56,673 INFO L225 Difference]: With dead ends: 353 [2022-10-17 10:26:56,673 INFO L226 Difference]: Without dead ends: 321 [2022-10-17 10:26:56,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:26:56,683 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 206 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:26:56,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 702 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:26:56,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-10-17 10:26:56,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 273. [2022-10-17 10:26:56,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 247 states have (on average 1.4615384615384615) internal successors, (361), 251 states have internal predecessors, (361), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-10-17 10:26:56,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 405 transitions. [2022-10-17 10:26:56,720 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 405 transitions. Word has length 40 [2022-10-17 10:26:56,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:26:56,720 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 405 transitions. [2022-10-17 10:26:56,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:26:56,721 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 405 transitions. [2022-10-17 10:26:56,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-10-17 10:26:56,735 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:26:56,735 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:26:56,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:26:56,735 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:26:56,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:26:56,736 INFO L85 PathProgramCache]: Analyzing trace with hash 102467890, now seen corresponding path program 1 times [2022-10-17 10:26:56,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:26:56,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130998131] [2022-10-17 10:26:56,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:56,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:26:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:56,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:26:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:56,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:26:56,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:56,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:26:56,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:56,887 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 10:26:56,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:26:56,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130998131] [2022-10-17 10:26:56,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130998131] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:26:56,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:26:56,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:26:56,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544494423] [2022-10-17 10:26:56,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:26:56,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:26:56,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:26:56,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:26:56,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:26:56,895 INFO L87 Difference]: Start difference. First operand 273 states and 405 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:26:56,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:26:56,961 INFO L93 Difference]: Finished difference Result 294 states and 435 transitions. [2022-10-17 10:26:56,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:26:56,962 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 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 40 [2022-10-17 10:26:56,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:26:56,966 INFO L225 Difference]: With dead ends: 294 [2022-10-17 10:26:56,966 INFO L226 Difference]: Without dead ends: 287 [2022-10-17 10:26:56,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:26:56,979 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 45 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:26:56,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 402 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:26:56,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-10-17 10:26:57,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 274. [2022-10-17 10:26:57,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 248 states have (on average 1.4596774193548387) internal successors, (362), 252 states have internal predecessors, (362), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-10-17 10:26:57,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 406 transitions. [2022-10-17 10:26:57,017 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 406 transitions. Word has length 40 [2022-10-17 10:26:57,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:26:57,019 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 406 transitions. [2022-10-17 10:26:57,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:26:57,019 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 406 transitions. [2022-10-17 10:26:57,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-10-17 10:26:57,023 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:26:57,023 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:26:57,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:26:57,024 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:26:57,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:26:57,024 INFO L85 PathProgramCache]: Analyzing trace with hash 991244780, now seen corresponding path program 1 times [2022-10-17 10:26:57,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:26:57,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905767092] [2022-10-17 10:26:57,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:57,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:26:57,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:57,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:26:57,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:57,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:26:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:57,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:26:57,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:57,513 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:26:57,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:26:57,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905767092] [2022-10-17 10:26:57,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905767092] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:26:57,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345342249] [2022-10-17 10:26:57,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:57,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:26:57,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:26:57,529 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:26:57,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:26:57,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:57,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-10-17 10:26:57,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:26:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:26:57,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:26:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:26:58,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345342249] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:26:58,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:26:58,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 17 [2022-10-17 10:26:58,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867543183] [2022-10-17 10:26:58,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:26:58,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-17 10:26:58,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:26:58,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-17 10:26:58,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-10-17 10:26:58,036 INFO L87 Difference]: Start difference. First operand 274 states and 406 transitions. Second operand has 17 states, 16 states have (on average 2.875) internal successors, (46), 12 states have internal predecessors, (46), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-10-17 10:26:58,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:26:58,897 INFO L93 Difference]: Finished difference Result 561 states and 855 transitions. [2022-10-17 10:26:58,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-10-17 10:26:58,898 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 12 states have internal predecessors, (46), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) Word has length 41 [2022-10-17 10:26:58,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:26:58,901 INFO L225 Difference]: With dead ends: 561 [2022-10-17 10:26:58,901 INFO L226 Difference]: Without dead ends: 290 [2022-10-17 10:26:58,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-10-17 10:26:58,904 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 467 mSDsluCounter, 1383 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 1545 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-17 10:26:58,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 1545 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-17 10:26:58,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-10-17 10:26:58,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 173. [2022-10-17 10:26:58,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 153 states have (on average 1.4379084967320261) internal successors, (220), 156 states have internal predecessors, (220), 15 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (20), 15 states have call predecessors, (20), 14 states have call successors, (20) [2022-10-17 10:26:58,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 255 transitions. [2022-10-17 10:26:58,928 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 255 transitions. Word has length 41 [2022-10-17 10:26:58,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:26:58,928 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 255 transitions. [2022-10-17 10:26:58,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 12 states have internal predecessors, (46), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-10-17 10:26:58,929 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 255 transitions. [2022-10-17 10:26:58,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-10-17 10:26:58,930 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:26:58,930 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:26:58,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:26:59,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:26:59,141 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:26:59,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:26:59,142 INFO L85 PathProgramCache]: Analyzing trace with hash 493844178, now seen corresponding path program 1 times [2022-10-17 10:26:59,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:26:59,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792697041] [2022-10-17 10:26:59,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:59,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:26:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:59,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:26:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:59,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:26:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:59,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:26:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 10:26:59,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:26:59,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792697041] [2022-10-17 10:26:59,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792697041] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:26:59,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:26:59,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:26:59,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465599538] [2022-10-17 10:26:59,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:26:59,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:26:59,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:26:59,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:26:59,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:26:59,244 INFO L87 Difference]: Start difference. First operand 173 states and 255 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:26:59,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:26:59,343 INFO L93 Difference]: Finished difference Result 205 states and 303 transitions. [2022-10-17 10:26:59,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:26:59,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 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 43 [2022-10-17 10:26:59,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:26:59,347 INFO L225 Difference]: With dead ends: 205 [2022-10-17 10:26:59,347 INFO L226 Difference]: Without dead ends: 179 [2022-10-17 10:26:59,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:26:59,350 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 174 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:26:59,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 576 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:26:59,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-10-17 10:26:59,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 163. [2022-10-17 10:26:59,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 145 states have (on average 1.4206896551724137) internal successors, (206), 147 states have internal predecessors, (206), 13 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (18), 13 states have call predecessors, (18), 12 states have call successors, (18) [2022-10-17 10:26:59,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 237 transitions. [2022-10-17 10:26:59,368 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 237 transitions. Word has length 43 [2022-10-17 10:26:59,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:26:59,369 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 237 transitions. [2022-10-17 10:26:59,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:26:59,376 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 237 transitions. [2022-10-17 10:26:59,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-10-17 10:26:59,378 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:26:59,378 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:26:59,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:26:59,378 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:26:59,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:26:59,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1964302618, now seen corresponding path program 1 times [2022-10-17 10:26:59,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:26:59,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84526022] [2022-10-17 10:26:59,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:59,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:26:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:59,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:26:59,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:59,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:26:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:59,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:26:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:59,480 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 10:26:59,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:26:59,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84526022] [2022-10-17 10:26:59,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84526022] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:26:59,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:26:59,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:26:59,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075075673] [2022-10-17 10:26:59,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:26:59,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:26:59,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:26:59,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:26:59,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:26:59,488 INFO L87 Difference]: Start difference. First operand 163 states and 237 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:26:59,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:26:59,563 INFO L93 Difference]: Finished difference Result 185 states and 268 transitions. [2022-10-17 10:26:59,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:26:59,564 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 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 44 [2022-10-17 10:26:59,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:26:59,573 INFO L225 Difference]: With dead ends: 185 [2022-10-17 10:26:59,575 INFO L226 Difference]: Without dead ends: 178 [2022-10-17 10:26:59,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:26:59,577 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 54 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:26:59,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 536 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:26:59,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-10-17 10:26:59,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 164. [2022-10-17 10:26:59,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 146 states have (on average 1.417808219178082) internal successors, (207), 148 states have internal predecessors, (207), 13 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (18), 13 states have call predecessors, (18), 12 states have call successors, (18) [2022-10-17 10:26:59,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 238 transitions. [2022-10-17 10:26:59,596 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 238 transitions. Word has length 44 [2022-10-17 10:26:59,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:26:59,596 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 238 transitions. [2022-10-17 10:26:59,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:26:59,597 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 238 transitions. [2022-10-17 10:26:59,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-10-17 10:26:59,598 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:26:59,599 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:26:59,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 10:26:59,599 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:26:59,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:26:59,600 INFO L85 PathProgramCache]: Analyzing trace with hash -189295256, now seen corresponding path program 1 times [2022-10-17 10:26:59,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:26:59,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243894821] [2022-10-17 10:26:59,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:59,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:26:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:59,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:26:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:59,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:26:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:59,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:26:59,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:59,749 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 10:26:59,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:26:59,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243894821] [2022-10-17 10:26:59,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243894821] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:26:59,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:26:59,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:26:59,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847340566] [2022-10-17 10:26:59,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:26:59,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:26:59,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:26:59,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:26:59,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:26:59,753 INFO L87 Difference]: Start difference. First operand 164 states and 238 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:26:59,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:26:59,844 INFO L93 Difference]: Finished difference Result 179 states and 258 transitions. [2022-10-17 10:26:59,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:26:59,845 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 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 44 [2022-10-17 10:26:59,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:26:59,849 INFO L225 Difference]: With dead ends: 179 [2022-10-17 10:26:59,849 INFO L226 Difference]: Without dead ends: 172 [2022-10-17 10:26:59,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:26:59,855 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 42 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:26:59,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 678 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:26:59,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-10-17 10:26:59,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 162. [2022-10-17 10:26:59,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 144 states have (on average 1.4097222222222223) internal successors, (203), 146 states have internal predecessors, (203), 13 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (18), 13 states have call predecessors, (18), 12 states have call successors, (18) [2022-10-17 10:26:59,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 234 transitions. [2022-10-17 10:26:59,872 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 234 transitions. Word has length 44 [2022-10-17 10:26:59,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:26:59,872 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 234 transitions. [2022-10-17 10:26:59,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:26:59,873 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 234 transitions. [2022-10-17 10:26:59,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-17 10:26:59,874 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:26:59,874 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:26:59,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 10:26:59,874 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:26:59,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:26:59,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1232722459, now seen corresponding path program 1 times [2022-10-17 10:26:59,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:26:59,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207224730] [2022-10-17 10:26:59,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:59,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:26:59,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:00,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:00,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:27:00,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:00,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-10-17 10:27:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:00,168 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:27:00,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:00,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207224730] [2022-10-17 10:27:00,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207224730] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:27:00,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806674822] [2022-10-17 10:27:00,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:00,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:00,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:27:00,173 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:27:00,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:27:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:00,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2022-10-17 10:27:00,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:27:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:27:00,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:27:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:27:00,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806674822] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 10:27:00,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:27:00,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 8] total 17 [2022-10-17 10:27:00,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956841844] [2022-10-17 10:27:00,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:00,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:27:00,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:00,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:27:00,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-10-17 10:27:00,503 INFO L87 Difference]: Start difference. First operand 162 states and 234 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:27:00,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:00,595 INFO L93 Difference]: Finished difference Result 392 states and 564 transitions. [2022-10-17 10:27:00,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:27:00,596 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 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 45 [2022-10-17 10:27:00,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:00,598 INFO L225 Difference]: With dead ends: 392 [2022-10-17 10:27:00,599 INFO L226 Difference]: Without dead ends: 280 [2022-10-17 10:27:00,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:27:00,600 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 85 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:00,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 707 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:27:00,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-10-17 10:27:00,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 276. [2022-10-17 10:27:00,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 250 states have (on average 1.392) internal successors, (348), 251 states have internal predecessors, (348), 21 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (26), 23 states have call predecessors, (26), 20 states have call successors, (26) [2022-10-17 10:27:00,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 395 transitions. [2022-10-17 10:27:00,620 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 395 transitions. Word has length 45 [2022-10-17 10:27:00,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:00,621 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 395 transitions. [2022-10-17 10:27:00,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:27:00,621 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 395 transitions. [2022-10-17 10:27:00,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-17 10:27:00,622 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:00,623 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:27:00,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:27:00,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-10-17 10:27:00,844 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:00,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:00,844 INFO L85 PathProgramCache]: Analyzing trace with hash 221605209, now seen corresponding path program 1 times [2022-10-17 10:27:00,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:00,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617650402] [2022-10-17 10:27:00,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:00,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:00,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:00,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:00,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:00,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:27:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:00,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-10-17 10:27:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:00,919 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 10:27:00,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:00,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617650402] [2022-10-17 10:27:00,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617650402] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:27:00,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:27:00,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:27:00,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795653241] [2022-10-17 10:27:00,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:00,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:27:00,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:00,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:27:00,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:27:00,922 INFO L87 Difference]: Start difference. First operand 276 states and 395 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:27:01,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:01,022 INFO L93 Difference]: Finished difference Result 422 states and 604 transitions. [2022-10-17 10:27:01,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:27:01,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 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 45 [2022-10-17 10:27:01,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:01,026 INFO L225 Difference]: With dead ends: 422 [2022-10-17 10:27:01,027 INFO L226 Difference]: Without dead ends: 382 [2022-10-17 10:27:01,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:27:01,028 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 186 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:01,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 538 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:27:01,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-10-17 10:27:01,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 311. [2022-10-17 10:27:01,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 284 states have (on average 1.3873239436619718) internal successors, (394), 284 states have internal predecessors, (394), 22 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (27), 24 states have call predecessors, (27), 21 states have call successors, (27) [2022-10-17 10:27:01,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 443 transitions. [2022-10-17 10:27:01,062 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 443 transitions. Word has length 45 [2022-10-17 10:27:01,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:01,064 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 443 transitions. [2022-10-17 10:27:01,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:27:01,064 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 443 transitions. [2022-10-17 10:27:01,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-10-17 10:27:01,066 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:01,066 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:27:01,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-17 10:27:01,066 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:01,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:01,069 INFO L85 PathProgramCache]: Analyzing trace with hash -2044635565, now seen corresponding path program 1 times [2022-10-17 10:27:01,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:01,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034620055] [2022-10-17 10:27:01,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:01,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:01,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:01,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:01,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:01,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:27:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:01,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:27:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:27:01,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:01,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034620055] [2022-10-17 10:27:01,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034620055] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:27:01,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900946091] [2022-10-17 10:27:01,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:01,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:01,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:27:01,429 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:27:01,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:27:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:01,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-17 10:27:01,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:27:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 10:27:01,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:27:01,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900946091] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:27:01,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:27:01,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2022-10-17 10:27:01,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807057793] [2022-10-17 10:27:01,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:01,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:27:01,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:01,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:27:01,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-10-17 10:27:01,555 INFO L87 Difference]: Start difference. First operand 311 states and 443 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:27:01,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:01,780 INFO L93 Difference]: Finished difference Result 613 states and 868 transitions. [2022-10-17 10:27:01,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:27:01,781 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 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 48 [2022-10-17 10:27:01,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:01,787 INFO L225 Difference]: With dead ends: 613 [2022-10-17 10:27:01,787 INFO L226 Difference]: Without dead ends: 587 [2022-10-17 10:27:01,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:27:01,789 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 181 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:01,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 745 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:27:01,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-10-17 10:27:01,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 467. [2022-10-17 10:27:01,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 428 states have (on average 1.3574766355140186) internal successors, (581), 429 states have internal predecessors, (581), 34 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (39), 36 states have call predecessors, (39), 33 states have call successors, (39) [2022-10-17 10:27:01,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 654 transitions. [2022-10-17 10:27:01,828 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 654 transitions. Word has length 48 [2022-10-17 10:27:01,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:01,828 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 654 transitions. [2022-10-17 10:27:01,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:27:01,829 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 654 transitions. [2022-10-17 10:27:01,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-10-17 10:27:01,830 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:01,830 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:27:01,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:27:02,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:02,045 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:02,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:02,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1343570987, now seen corresponding path program 1 times [2022-10-17 10:27:02,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:02,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476080918] [2022-10-17 10:27:02,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:02,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:02,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:02,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:02,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:02,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:27:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:02,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:27:02,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:02,111 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 10:27:02,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:02,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476080918] [2022-10-17 10:27:02,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476080918] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:27:02,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:27:02,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:27:02,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666962010] [2022-10-17 10:27:02,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:02,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:27:02,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:02,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:27:02,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:27:02,116 INFO L87 Difference]: Start difference. First operand 467 states and 654 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:27:02,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:02,187 INFO L93 Difference]: Finished difference Result 491 states and 685 transitions. [2022-10-17 10:27:02,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:27:02,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 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 48 [2022-10-17 10:27:02,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:02,192 INFO L225 Difference]: With dead ends: 491 [2022-10-17 10:27:02,192 INFO L226 Difference]: Without dead ends: 451 [2022-10-17 10:27:02,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:27:02,193 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 38 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:02,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 528 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:27:02,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-10-17 10:27:02,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 443. [2022-10-17 10:27:02,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 404 states have (on average 1.3514851485148516) internal successors, (546), 405 states have internal predecessors, (546), 34 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (38), 35 states have call predecessors, (38), 32 states have call successors, (38) [2022-10-17 10:27:02,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 618 transitions. [2022-10-17 10:27:02,227 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 618 transitions. Word has length 48 [2022-10-17 10:27:02,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:02,228 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 618 transitions. [2022-10-17 10:27:02,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:27:02,228 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 618 transitions. [2022-10-17 10:27:02,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-10-17 10:27:02,229 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:02,230 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:27:02,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-17 10:27:02,230 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:02,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:02,231 INFO L85 PathProgramCache]: Analyzing trace with hash 502143871, now seen corresponding path program 1 times [2022-10-17 10:27:02,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:02,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624992359] [2022-10-17 10:27:02,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:02,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:02,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:02,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:02,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:27:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:02,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:27:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 10:27:02,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:02,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624992359] [2022-10-17 10:27:02,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624992359] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:27:02,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:27:02,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:27:02,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176373789] [2022-10-17 10:27:02,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:02,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:27:02,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:02,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:27:02,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:27:02,296 INFO L87 Difference]: Start difference. First operand 443 states and 618 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:27:02,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:02,393 INFO L93 Difference]: Finished difference Result 840 states and 1171 transitions. [2022-10-17 10:27:02,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:27:02,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 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 48 [2022-10-17 10:27:02,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:02,398 INFO L225 Difference]: With dead ends: 840 [2022-10-17 10:27:02,398 INFO L226 Difference]: Without dead ends: 524 [2022-10-17 10:27:02,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:27:02,400 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 75 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:02,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 426 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:27:02,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-10-17 10:27:02,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 448. [2022-10-17 10:27:02,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 409 states have (on average 1.3227383863080684) internal successors, (541), 410 states have internal predecessors, (541), 34 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (38), 35 states have call predecessors, (38), 32 states have call successors, (38) [2022-10-17 10:27:02,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 613 transitions. [2022-10-17 10:27:02,430 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 613 transitions. Word has length 48 [2022-10-17 10:27:02,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:02,430 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 613 transitions. [2022-10-17 10:27:02,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:27:02,431 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 613 transitions. [2022-10-17 10:27:02,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-10-17 10:27:02,432 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:02,432 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:27:02,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-10-17 10:27:02,433 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:02,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:02,433 INFO L85 PathProgramCache]: Analyzing trace with hash -50490859, now seen corresponding path program 1 times [2022-10-17 10:27:02,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:02,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85361828] [2022-10-17 10:27:02,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:02,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:02,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:02,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:27:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:02,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:27:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:02,687 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:27:02,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:02,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85361828] [2022-10-17 10:27:02,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85361828] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:27:02,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:27:02,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-10-17 10:27:02,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293134471] [2022-10-17 10:27:02,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:02,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:27:02,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:02,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:27:02,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:27:02,690 INFO L87 Difference]: Start difference. First operand 448 states and 613 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 10:27:02,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:02,996 INFO L93 Difference]: Finished difference Result 622 states and 846 transitions. [2022-10-17 10:27:02,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:27:02,996 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-10-17 10:27:02,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:03,000 INFO L225 Difference]: With dead ends: 622 [2022-10-17 10:27:03,000 INFO L226 Difference]: Without dead ends: 533 [2022-10-17 10:27:03,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-10-17 10:27:03,002 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 122 mSDsluCounter, 1442 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1660 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:03,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 1660 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:27:03,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-10-17 10:27:03,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 445. [2022-10-17 10:27:03,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 406 states have (on average 1.3251231527093597) internal successors, (538), 408 states have internal predecessors, (538), 34 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (36), 34 states have call predecessors, (36), 32 states have call successors, (36) [2022-10-17 10:27:03,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 608 transitions. [2022-10-17 10:27:03,031 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 608 transitions. Word has length 48 [2022-10-17 10:27:03,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:03,032 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 608 transitions. [2022-10-17 10:27:03,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 10:27:03,032 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 608 transitions. [2022-10-17 10:27:03,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-10-17 10:27:03,034 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:03,034 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] [2022-10-17 10:27:03,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-10-17 10:27:03,035 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:03,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:03,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1297236278, now seen corresponding path program 1 times [2022-10-17 10:27:03,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:03,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452410147] [2022-10-17 10:27:03,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:03,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:03,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:03,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:03,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:03,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:27:03,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:03,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-10-17 10:27:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:03,229 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-17 10:27:03,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:03,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452410147] [2022-10-17 10:27:03,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452410147] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:27:03,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872297921] [2022-10-17 10:27:03,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:03,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:03,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:27:03,232 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:27:03,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:27:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:03,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-17 10:27:03,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:27:03,372 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-17 10:27:03,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:27:03,509 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-17 10:27:03,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872297921] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:27:03,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:27:03,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-10-17 10:27:03,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61083090] [2022-10-17 10:27:03,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:27:03,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-17 10:27:03,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:03,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-17 10:27:03,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-10-17 10:27:03,511 INFO L87 Difference]: Start difference. First operand 445 states and 608 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 12 states have internal predecessors, (49), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-10-17 10:27:04,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:04,331 INFO L93 Difference]: Finished difference Result 1186 states and 1619 transitions. [2022-10-17 10:27:04,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-17 10:27:04,331 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 12 states have internal predecessors, (49), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 49 [2022-10-17 10:27:04,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:04,337 INFO L225 Difference]: With dead ends: 1186 [2022-10-17 10:27:04,337 INFO L226 Difference]: Without dead ends: 808 [2022-10-17 10:27:04,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-10-17 10:27:04,339 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 551 mSDsluCounter, 1883 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 2129 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:04,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [554 Valid, 2129 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-17 10:27:04,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-10-17 10:27:04,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 644. [2022-10-17 10:27:04,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 589 states have (on average 1.2767402376910018) internal successors, (752), 592 states have internal predecessors, (752), 49 states have call successors, (49), 3 states have call predecessors, (49), 5 states have return successors, (56), 50 states have call predecessors, (56), 46 states have call successors, (56) [2022-10-17 10:27:04,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 857 transitions. [2022-10-17 10:27:04,388 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 857 transitions. Word has length 49 [2022-10-17 10:27:04,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:04,389 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 857 transitions. [2022-10-17 10:27:04,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 12 states have internal predecessors, (49), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-10-17 10:27:04,389 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 857 transitions. [2022-10-17 10:27:04,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-10-17 10:27:04,391 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:04,391 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-10-17 10:27:04,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:27:04,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:04,616 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:04,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:04,616 INFO L85 PathProgramCache]: Analyzing trace with hash -2012462520, now seen corresponding path program 1 times [2022-10-17 10:27:04,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:04,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890980275] [2022-10-17 10:27:04,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:04,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:05,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:05,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:05,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:27:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:05,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:27:05,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:27:05,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:05,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890980275] [2022-10-17 10:27:05,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890980275] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:27:05,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802402699] [2022-10-17 10:27:05,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:05,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:05,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:27:05,358 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:27:05,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:27:05,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:05,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-17 10:27:05,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:27:05,746 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 10:27:05,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:27:05,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802402699] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:27:05,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:27:05,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2022-10-17 10:27:05,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296874915] [2022-10-17 10:27:05,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:05,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:27:05,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:05,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:27:05,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2022-10-17 10:27:05,749 INFO L87 Difference]: Start difference. First operand 644 states and 857 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:27:06,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:06,165 INFO L93 Difference]: Finished difference Result 842 states and 1127 transitions. [2022-10-17 10:27:06,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:27:06,165 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (4), 2 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 50 [2022-10-17 10:27:06,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:06,171 INFO L225 Difference]: With dead ends: 842 [2022-10-17 10:27:06,171 INFO L226 Difference]: Without dead ends: 823 [2022-10-17 10:27:06,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2022-10-17 10:27:06,173 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 284 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:06,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 1167 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:27:06,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-10-17 10:27:06,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 673. [2022-10-17 10:27:06,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 616 states have (on average 1.271103896103896) internal successors, (783), 620 states have internal predecessors, (783), 51 states have call successors, (51), 3 states have call predecessors, (51), 5 states have return successors, (58), 52 states have call predecessors, (58), 48 states have call successors, (58) [2022-10-17 10:27:06,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 892 transitions. [2022-10-17 10:27:06,227 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 892 transitions. Word has length 50 [2022-10-17 10:27:06,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:06,227 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 892 transitions. [2022-10-17 10:27:06,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:27:06,235 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 892 transitions. [2022-10-17 10:27:06,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-10-17 10:27:06,242 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:06,242 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] [2022-10-17 10:27:06,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:27:06,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-10-17 10:27:06,469 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:06,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:06,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1388940720, now seen corresponding path program 1 times [2022-10-17 10:27:06,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:06,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244769377] [2022-10-17 10:27:06,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:06,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:06,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:06,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:06,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:27:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:06,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-10-17 10:27:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-10-17 10:27:06,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:06,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244769377] [2022-10-17 10:27:06,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244769377] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:27:06,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:27:06,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:27:06,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542558615] [2022-10-17 10:27:06,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:06,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:27:06,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:06,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:27:06,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:27:06,598 INFO L87 Difference]: Start difference. First operand 673 states and 892 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:27:06,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:06,745 INFO L93 Difference]: Finished difference Result 726 states and 965 transitions. [2022-10-17 10:27:06,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:27:06,746 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (4), 2 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 51 [2022-10-17 10:27:06,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:06,751 INFO L225 Difference]: With dead ends: 726 [2022-10-17 10:27:06,751 INFO L226 Difference]: Without dead ends: 724 [2022-10-17 10:27:06,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:27:06,752 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 78 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:06,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 840 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:27:06,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-10-17 10:27:06,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 682. [2022-10-17 10:27:06,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 621 states have (on average 1.2689210950080516) internal successors, (788), 628 states have internal predecessors, (788), 54 states have call successors, (54), 4 states have call predecessors, (54), 6 states have return successors, (61), 52 states have call predecessors, (61), 51 states have call successors, (61) [2022-10-17 10:27:06,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 903 transitions. [2022-10-17 10:27:06,808 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 903 transitions. Word has length 51 [2022-10-17 10:27:06,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:06,809 INFO L495 AbstractCegarLoop]: Abstraction has 682 states and 903 transitions. [2022-10-17 10:27:06,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:27:06,809 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 903 transitions. [2022-10-17 10:27:06,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-10-17 10:27:06,811 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:06,811 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-10-17 10:27:06,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-10-17 10:27:06,811 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:06,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:06,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1800205628, now seen corresponding path program 1 times [2022-10-17 10:27:06,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:06,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519083394] [2022-10-17 10:27:06,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:06,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:06,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:06,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:27:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:06,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:27:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:06,875 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 10:27:06,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:06,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519083394] [2022-10-17 10:27:06,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519083394] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:27:06,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:27:06,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:27:06,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095092595] [2022-10-17 10:27:06,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:06,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:27:06,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:06,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:27:06,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:27:06,878 INFO L87 Difference]: Start difference. First operand 682 states and 903 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:27:06,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:06,977 INFO L93 Difference]: Finished difference Result 699 states and 926 transitions. [2022-10-17 10:27:06,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:27:06,977 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 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 52 [2022-10-17 10:27:06,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:06,982 INFO L225 Difference]: With dead ends: 699 [2022-10-17 10:27:06,982 INFO L226 Difference]: Without dead ends: 673 [2022-10-17 10:27:06,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:27:06,983 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 38 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:06,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 516 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:27:06,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-10-17 10:27:07,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 567. [2022-10-17 10:27:07,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 515 states have (on average 1.2757281553398059) internal successors, (657), 521 states have internal predecessors, (657), 45 states have call successors, (45), 4 states have call predecessors, (45), 6 states have return successors, (52), 43 states have call predecessors, (52), 42 states have call successors, (52) [2022-10-17 10:27:07,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 754 transitions. [2022-10-17 10:27:07,031 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 754 transitions. Word has length 52 [2022-10-17 10:27:07,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:07,032 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 754 transitions. [2022-10-17 10:27:07,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:27:07,032 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 754 transitions. [2022-10-17 10:27:07,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-10-17 10:27:07,034 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:07,034 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-10-17 10:27:07,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-10-17 10:27:07,034 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:07,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:07,036 INFO L85 PathProgramCache]: Analyzing trace with hash 2067118233, now seen corresponding path program 1 times [2022-10-17 10:27:07,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:07,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606659590] [2022-10-17 10:27:07,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:07,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:07,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:07,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:07,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:27:07,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:07,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-10-17 10:27:07,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:07,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-10-17 10:27:07,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-17 10:27:07,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:07,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606659590] [2022-10-17 10:27:07,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606659590] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:27:07,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:27:07,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 10:27:07,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635635075] [2022-10-17 10:27:07,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:07,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:27:07,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:07,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:27:07,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:27:07,240 INFO L87 Difference]: Start difference. First operand 567 states and 754 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:27:07,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:07,577 INFO L93 Difference]: Finished difference Result 1253 states and 1690 transitions. [2022-10-17 10:27:07,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:27:07,578 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (5), 3 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 57 [2022-10-17 10:27:07,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:07,585 INFO L225 Difference]: With dead ends: 1253 [2022-10-17 10:27:07,585 INFO L226 Difference]: Without dead ends: 1047 [2022-10-17 10:27:07,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:27:07,587 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 184 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:07,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 1360 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:27:07,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2022-10-17 10:27:07,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 916. [2022-10-17 10:27:07,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 840 states have (on average 1.2642857142857142) internal successors, (1062), 847 states have internal predecessors, (1062), 69 states have call successors, (69), 4 states have call predecessors, (69), 6 states have return successors, (76), 68 states have call predecessors, (76), 66 states have call successors, (76) [2022-10-17 10:27:07,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1207 transitions. [2022-10-17 10:27:07,670 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1207 transitions. Word has length 57 [2022-10-17 10:27:07,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:07,671 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1207 transitions. [2022-10-17 10:27:07,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:27:07,671 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1207 transitions. [2022-10-17 10:27:07,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-10-17 10:27:07,674 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:07,674 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-10-17 10:27:07,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-10-17 10:27:07,674 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:07,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:07,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1155927203, now seen corresponding path program 1 times [2022-10-17 10:27:07,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:07,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330091727] [2022-10-17 10:27:07,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:07,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:07,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:07,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:27:07,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:07,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:27:07,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:27:07,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:07,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330091727] [2022-10-17 10:27:07,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330091727] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:27:07,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68922436] [2022-10-17 10:27:07,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:07,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:07,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:27:07,821 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:27:07,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 10:27:07,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:07,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 10:27:07,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:27:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:27:08,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:27:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:27:08,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68922436] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:27:08,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:27:08,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-10-17 10:27:08,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209061063] [2022-10-17 10:27:08,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:27:08,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:27:08,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:08,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:27:08,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:27:08,128 INFO L87 Difference]: Start difference. First operand 916 states and 1207 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 11 states have internal predecessors, (66), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-10-17 10:27:08,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:08,540 INFO L93 Difference]: Finished difference Result 1645 states and 2177 transitions. [2022-10-17 10:27:08,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:27:08,541 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 11 states have internal predecessors, (66), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 58 [2022-10-17 10:27:08,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:08,551 INFO L225 Difference]: With dead ends: 1645 [2022-10-17 10:27:08,551 INFO L226 Difference]: Without dead ends: 1543 [2022-10-17 10:27:08,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:27:08,553 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 301 mSDsluCounter, 1946 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 2254 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:08,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 2254 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:27:08,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2022-10-17 10:27:08,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 928. [2022-10-17 10:27:08,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 852 states have (on average 1.2629107981220657) internal successors, (1076), 859 states have internal predecessors, (1076), 69 states have call successors, (69), 4 states have call predecessors, (69), 6 states have return successors, (76), 68 states have call predecessors, (76), 66 states have call successors, (76) [2022-10-17 10:27:08,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1221 transitions. [2022-10-17 10:27:08,650 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1221 transitions. Word has length 58 [2022-10-17 10:27:08,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:08,650 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 1221 transitions. [2022-10-17 10:27:08,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 11 states have internal predecessors, (66), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-10-17 10:27:08,651 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1221 transitions. [2022-10-17 10:27:08,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-10-17 10:27:08,653 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:08,653 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-10-17 10:27:08,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 10:27:08,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:08,881 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:08,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:08,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1021913697, now seen corresponding path program 1 times [2022-10-17 10:27:08,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:08,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525618081] [2022-10-17 10:27:08,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:08,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:09,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:09,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:27:09,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:09,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:27:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:09,069 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:27:09,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:09,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525618081] [2022-10-17 10:27:09,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525618081] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:27:09,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649530385] [2022-10-17 10:27:09,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:09,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:09,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:27:09,073 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:27:09,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 10:27:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:09,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-17 10:27:09,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:27:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:27:09,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:27:09,403 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:27:09,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649530385] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:27:09,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:27:09,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-10-17 10:27:09,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267207279] [2022-10-17 10:27:09,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:27:09,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-10-17 10:27:09,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:09,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-10-17 10:27:09,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-10-17 10:27:09,409 INFO L87 Difference]: Start difference. First operand 928 states and 1221 transitions. Second operand has 16 states, 16 states have (on average 4.6875) internal successors, (75), 13 states have internal predecessors, (75), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-10-17 10:27:09,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:09,930 INFO L93 Difference]: Finished difference Result 2168 states and 2928 transitions. [2022-10-17 10:27:09,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 10:27:09,931 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 13 states have internal predecessors, (75), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 58 [2022-10-17 10:27:09,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:09,943 INFO L225 Difference]: With dead ends: 2168 [2022-10-17 10:27:09,943 INFO L226 Difference]: Without dead ends: 2046 [2022-10-17 10:27:09,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 109 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-10-17 10:27:09,945 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 257 mSDsluCounter, 2911 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 3240 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:09,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 3240 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:27:09,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2022-10-17 10:27:10,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 908. [2022-10-17 10:27:10,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 833 states have (on average 1.2665066026410565) internal successors, (1055), 842 states have internal predecessors, (1055), 68 states have call successors, (68), 4 states have call predecessors, (68), 6 states have return successors, (72), 65 states have call predecessors, (72), 65 states have call successors, (72) [2022-10-17 10:27:10,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1195 transitions. [2022-10-17 10:27:10,039 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1195 transitions. Word has length 58 [2022-10-17 10:27:10,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:10,039 INFO L495 AbstractCegarLoop]: Abstraction has 908 states and 1195 transitions. [2022-10-17 10:27:10,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 13 states have internal predecessors, (75), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-10-17 10:27:10,040 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1195 transitions. [2022-10-17 10:27:10,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-10-17 10:27:10,042 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:10,042 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-10-17 10:27:10,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-17 10:27:10,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:10,259 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:10,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:10,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1110635549, now seen corresponding path program 1 times [2022-10-17 10:27:10,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:10,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446638011] [2022-10-17 10:27:10,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:10,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:10,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:10,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:27:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:10,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-10-17 10:27:10,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:10,388 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:27:10,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:10,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446638011] [2022-10-17 10:27:10,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446638011] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:27:10,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:27:10,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 10:27:10,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522299327] [2022-10-17 10:27:10,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:10,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:27:10,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:10,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:27:10,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:27:10,391 INFO L87 Difference]: Start difference. First operand 908 states and 1195 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:27:10,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:10,598 INFO L93 Difference]: Finished difference Result 958 states and 1256 transitions. [2022-10-17 10:27:10,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:27:10,599 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (4), 2 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 58 [2022-10-17 10:27:10,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:10,604 INFO L225 Difference]: With dead ends: 958 [2022-10-17 10:27:10,604 INFO L226 Difference]: Without dead ends: 752 [2022-10-17 10:27:10,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:27:10,607 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 44 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:10,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 869 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:27:10,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-10-17 10:27:10,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 744. [2022-10-17 10:27:10,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 679 states have (on average 1.2709867452135493) internal successors, (863), 689 states have internal predecessors, (863), 59 states have call successors, (59), 4 states have call predecessors, (59), 5 states have return successors, (59), 54 states have call predecessors, (59), 56 states have call successors, (59) [2022-10-17 10:27:10,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 981 transitions. [2022-10-17 10:27:10,693 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 981 transitions. Word has length 58 [2022-10-17 10:27:10,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:10,694 INFO L495 AbstractCegarLoop]: Abstraction has 744 states and 981 transitions. [2022-10-17 10:27:10,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:27:10,694 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 981 transitions. [2022-10-17 10:27:10,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-10-17 10:27:10,697 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:10,697 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-10-17 10:27:10,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-10-17 10:27:10,698 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:10,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:10,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1691045042, now seen corresponding path program 1 times [2022-10-17 10:27:10,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:10,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390453694] [2022-10-17 10:27:10,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:10,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:10,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:10,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:10,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:27:10,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:10,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-10-17 10:27:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:10,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-10-17 10:27:10,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:10,785 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:27:10,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:10,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390453694] [2022-10-17 10:27:10,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390453694] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:27:10,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:27:10,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:27:10,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050943289] [2022-10-17 10:27:10,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:10,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:27:10,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:10,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:27:10,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:27:10,788 INFO L87 Difference]: Start difference. First operand 744 states and 981 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:27:10,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:10,925 INFO L93 Difference]: Finished difference Result 1373 states and 1824 transitions. [2022-10-17 10:27:10,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:27:10,926 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (5), 3 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 59 [2022-10-17 10:27:10,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:10,930 INFO L225 Difference]: With dead ends: 1373 [2022-10-17 10:27:10,931 INFO L226 Difference]: Without dead ends: 764 [2022-10-17 10:27:10,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:27:10,933 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 55 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:10,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 355 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:27:10,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-10-17 10:27:10,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 745. [2022-10-17 10:27:10,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 680 states have (on average 1.2705882352941176) internal successors, (864), 690 states have internal predecessors, (864), 59 states have call successors, (59), 4 states have call predecessors, (59), 5 states have return successors, (59), 54 states have call predecessors, (59), 56 states have call successors, (59) [2022-10-17 10:27:11,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 982 transitions. [2022-10-17 10:27:11,006 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 982 transitions. Word has length 59 [2022-10-17 10:27:11,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:11,007 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 982 transitions. [2022-10-17 10:27:11,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:27:11,007 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 982 transitions. [2022-10-17 10:27:11,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-10-17 10:27:11,009 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:11,010 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-10-17 10:27:11,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-10-17 10:27:11,010 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:11,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:11,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1304426309, now seen corresponding path program 1 times [2022-10-17 10:27:11,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:11,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48799827] [2022-10-17 10:27:11,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:11,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:11,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:11,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:11,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:27:11,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:11,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-10-17 10:27:11,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:11,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-10-17 10:27:11,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:11,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:27:11,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:11,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48799827] [2022-10-17 10:27:11,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48799827] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:27:11,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497365118] [2022-10-17 10:27:11,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:11,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:11,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:27:11,305 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:27:11,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 10:27:11,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:11,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjunts are in the unsatisfiable core [2022-10-17 10:27:11,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:27:11,929 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 10:27:11,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:27:12,284 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:27:12,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497365118] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 10:27:12,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:27:12,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 11] total 26 [2022-10-17 10:27:12,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153852364] [2022-10-17 10:27:12,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:12,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 10:27:12,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:12,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 10:27:12,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-10-17 10:27:12,287 INFO L87 Difference]: Start difference. First operand 745 states and 982 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:27:12,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:12,937 INFO L93 Difference]: Finished difference Result 1182 states and 1559 transitions. [2022-10-17 10:27:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:27:12,937 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 3 states have call successors, (5), 2 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 60 [2022-10-17 10:27:12,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:12,945 INFO L225 Difference]: With dead ends: 1182 [2022-10-17 10:27:12,945 INFO L226 Difference]: Without dead ends: 1147 [2022-10-17 10:27:12,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-10-17 10:27:12,948 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 242 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 1707 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:12,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 1707 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:27:12,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-10-17 10:27:13,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1000. [2022-10-17 10:27:13,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 912 states have (on average 1.2763157894736843) internal successors, (1164), 923 states have internal predecessors, (1164), 81 states have call successors, (81), 4 states have call predecessors, (81), 6 states have return successors, (84), 77 states have call predecessors, (84), 78 states have call successors, (84) [2022-10-17 10:27:13,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1329 transitions. [2022-10-17 10:27:13,053 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1329 transitions. Word has length 60 [2022-10-17 10:27:13,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:13,053 INFO L495 AbstractCegarLoop]: Abstraction has 1000 states and 1329 transitions. [2022-10-17 10:27:13,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:27:13,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1329 transitions. [2022-10-17 10:27:13,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-10-17 10:27:13,056 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:13,056 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-10-17 10:27:13,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-17 10:27:13,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-10-17 10:27:13,285 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:13,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:13,286 INFO L85 PathProgramCache]: Analyzing trace with hash -339625375, now seen corresponding path program 1 times [2022-10-17 10:27:13,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:13,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838063918] [2022-10-17 10:27:13,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:13,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:13,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:13,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:13,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:27:13,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:13,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-10-17 10:27:13,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:13,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-10-17 10:27:13,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-10-17 10:27:13,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:13,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838063918] [2022-10-17 10:27:13,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838063918] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:27:13,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:27:13,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:27:13,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692416334] [2022-10-17 10:27:13,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:13,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:27:13,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:13,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:27:13,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:27:13,437 INFO L87 Difference]: Start difference. First operand 1000 states and 1329 transitions. Second operand has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:27:13,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:13,642 INFO L93 Difference]: Finished difference Result 1038 states and 1377 transitions. [2022-10-17 10:27:13,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:27:13,648 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2022-10-17 10:27:13,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:13,654 INFO L225 Difference]: With dead ends: 1038 [2022-10-17 10:27:13,655 INFO L226 Difference]: Without dead ends: 1034 [2022-10-17 10:27:13,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:27:13,656 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 63 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:13,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 820 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:27:13,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2022-10-17 10:27:13,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 995. [2022-10-17 10:27:13,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 906 states have (on average 1.2759381898454747) internal successors, (1156), 919 states have internal predecessors, (1156), 81 states have call successors, (81), 5 states have call predecessors, (81), 7 states have return successors, (84), 75 states have call predecessors, (84), 78 states have call successors, (84) [2022-10-17 10:27:13,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1321 transitions. [2022-10-17 10:27:13,760 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1321 transitions. Word has length 62 [2022-10-17 10:27:13,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:13,761 INFO L495 AbstractCegarLoop]: Abstraction has 995 states and 1321 transitions. [2022-10-17 10:27:13,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:27:13,761 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1321 transitions. [2022-10-17 10:27:13,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-10-17 10:27:13,763 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:13,764 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-10-17 10:27:13,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-10-17 10:27:13,765 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:13,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:13,766 INFO L85 PathProgramCache]: Analyzing trace with hash -282367073, now seen corresponding path program 1 times [2022-10-17 10:27:13,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:13,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819177515] [2022-10-17 10:27:13,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:13,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:13,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:13,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:27:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:13,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-10-17 10:27:13,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:13,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-10-17 10:27:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:13,905 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-10-17 10:27:13,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:13,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819177515] [2022-10-17 10:27:13,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819177515] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:27:13,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:27:13,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:27:13,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853064510] [2022-10-17 10:27:13,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:13,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:27:13,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:13,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:27:13,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:27:13,909 INFO L87 Difference]: Start difference. First operand 995 states and 1321 transitions. Second operand has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:27:14,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:14,105 INFO L93 Difference]: Finished difference Result 1028 states and 1362 transitions. [2022-10-17 10:27:14,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:27:14,106 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2022-10-17 10:27:14,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:14,112 INFO L225 Difference]: With dead ends: 1028 [2022-10-17 10:27:14,112 INFO L226 Difference]: Without dead ends: 1014 [2022-10-17 10:27:14,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:27:14,114 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 63 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:14,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 820 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:27:14,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2022-10-17 10:27:14,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 980. [2022-10-17 10:27:14,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 894 states have (on average 1.2706935123042506) internal successors, (1136), 905 states have internal predecessors, (1136), 78 states have call successors, (78), 5 states have call predecessors, (78), 7 states have return successors, (80), 74 states have call predecessors, (80), 74 states have call successors, (80) [2022-10-17 10:27:14,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1294 transitions. [2022-10-17 10:27:14,210 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1294 transitions. Word has length 62 [2022-10-17 10:27:14,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:14,210 INFO L495 AbstractCegarLoop]: Abstraction has 980 states and 1294 transitions. [2022-10-17 10:27:14,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:27:14,211 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1294 transitions. [2022-10-17 10:27:14,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-10-17 10:27:14,214 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:14,214 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-10-17 10:27:14,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-10-17 10:27:14,214 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:14,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:14,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1649289642, now seen corresponding path program 1 times [2022-10-17 10:27:14,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:14,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556092248] [2022-10-17 10:27:14,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:14,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:14,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:14,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:14,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:27:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:14,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-10-17 10:27:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:14,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-10-17 10:27:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:14,516 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:27:14,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:14,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556092248] [2022-10-17 10:27:14,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556092248] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:27:14,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557194761] [2022-10-17 10:27:14,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:14,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:14,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:27:14,518 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:27:14,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-17 10:27:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:14,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-17 10:27:14,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:27:14,801 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-10-17 10:27:14,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:27:14,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557194761] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:27:14,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:27:14,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2022-10-17 10:27:14,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273256417] [2022-10-17 10:27:14,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:14,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:27:14,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:14,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:27:14,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-10-17 10:27:14,804 INFO L87 Difference]: Start difference. First operand 980 states and 1294 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:27:15,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:15,103 INFO L93 Difference]: Finished difference Result 1229 states and 1635 transitions. [2022-10-17 10:27:15,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:27:15,103 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (5), 2 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 62 [2022-10-17 10:27:15,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:15,111 INFO L225 Difference]: With dead ends: 1229 [2022-10-17 10:27:15,111 INFO L226 Difference]: Without dead ends: 1213 [2022-10-17 10:27:15,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-10-17 10:27:15,113 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 218 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:15,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 527 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:27:15,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-10-17 10:27:15,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 980. [2022-10-17 10:27:15,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 894 states have (on average 1.2684563758389262) internal successors, (1134), 905 states have internal predecessors, (1134), 78 states have call successors, (78), 5 states have call predecessors, (78), 7 states have return successors, (80), 74 states have call predecessors, (80), 74 states have call successors, (80) [2022-10-17 10:27:15,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1292 transitions. [2022-10-17 10:27:15,226 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1292 transitions. Word has length 62 [2022-10-17 10:27:15,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:15,227 INFO L495 AbstractCegarLoop]: Abstraction has 980 states and 1292 transitions. [2022-10-17 10:27:15,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:27:15,227 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1292 transitions. [2022-10-17 10:27:15,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-10-17 10:27:15,229 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:15,230 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] [2022-10-17 10:27:15,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-17 10:27:15,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-10-17 10:27:15,457 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:15,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:15,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1828096048, now seen corresponding path program 1 times [2022-10-17 10:27:15,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:15,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367030168] [2022-10-17 10:27:15,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:15,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:15,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:15,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:27:15,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:15,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-10-17 10:27:15,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:15,688 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-17 10:27:15,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:15,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367030168] [2022-10-17 10:27:15,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367030168] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:27:15,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:27:15,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 10:27:15,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405466991] [2022-10-17 10:27:15,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:15,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 10:27:15,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:15,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 10:27:15,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:27:15,691 INFO L87 Difference]: Start difference. First operand 980 states and 1292 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 7 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:27:16,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:16,046 INFO L93 Difference]: Finished difference Result 1643 states and 2220 transitions. [2022-10-17 10:27:16,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 10:27:16,046 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 7 states have internal predecessors, (47), 2 states have call successors, (4), 2 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 62 [2022-10-17 10:27:16,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:16,054 INFO L225 Difference]: With dead ends: 1643 [2022-10-17 10:27:16,054 INFO L226 Difference]: Without dead ends: 1189 [2022-10-17 10:27:16,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:27:16,057 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 211 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:16,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 1060 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:27:16,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2022-10-17 10:27:16,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1055. [2022-10-17 10:27:16,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 969 states have (on average 1.2445820433436532) internal successors, (1206), 980 states have internal predecessors, (1206), 78 states have call successors, (78), 5 states have call predecessors, (78), 7 states have return successors, (80), 74 states have call predecessors, (80), 74 states have call successors, (80) [2022-10-17 10:27:16,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1364 transitions. [2022-10-17 10:27:16,160 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1364 transitions. Word has length 62 [2022-10-17 10:27:16,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:16,161 INFO L495 AbstractCegarLoop]: Abstraction has 1055 states and 1364 transitions. [2022-10-17 10:27:16,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 7 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:27:16,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1364 transitions. [2022-10-17 10:27:16,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-10-17 10:27:16,164 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:16,164 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] [2022-10-17 10:27:16,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-10-17 10:27:16,164 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:16,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:16,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1826249006, now seen corresponding path program 1 times [2022-10-17 10:27:16,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:16,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962900112] [2022-10-17 10:27:16,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:16,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:16,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:16,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:16,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:16,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:27:16,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:16,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-10-17 10:27:16,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-17 10:27:16,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:16,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962900112] [2022-10-17 10:27:16,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962900112] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:27:16,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:27:16,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-10-17 10:27:16,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255002940] [2022-10-17 10:27:16,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:16,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:27:16,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:16,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:27:16,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:27:16,736 INFO L87 Difference]: Start difference. First operand 1055 states and 1364 transitions. Second operand has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 10 states have internal predecessors, (46), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 10:27:17,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:17,594 INFO L93 Difference]: Finished difference Result 1118 states and 1440 transitions. [2022-10-17 10:27:17,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-17 10:27:17,595 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 10 states have internal predecessors, (46), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2022-10-17 10:27:17,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:17,602 INFO L225 Difference]: With dead ends: 1118 [2022-10-17 10:27:17,602 INFO L226 Difference]: Without dead ends: 1116 [2022-10-17 10:27:17,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-10-17 10:27:17,605 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 380 mSDsluCounter, 1793 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 1998 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:17,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 1998 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-17 10:27:17,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-10-17 10:27:17,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1065. [2022-10-17 10:27:17,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 977 states have (on average 1.2425793244626406) internal successors, (1214), 989 states have internal predecessors, (1214), 79 states have call successors, (79), 6 states have call predecessors, (79), 8 states have return successors, (81), 74 states have call predecessors, (81), 75 states have call successors, (81) [2022-10-17 10:27:17,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1374 transitions. [2022-10-17 10:27:17,717 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1374 transitions. Word has length 62 [2022-10-17 10:27:17,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:17,718 INFO L495 AbstractCegarLoop]: Abstraction has 1065 states and 1374 transitions. [2022-10-17 10:27:17,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 10 states have internal predecessors, (46), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 10:27:17,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1374 transitions. [2022-10-17 10:27:17,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-10-17 10:27:17,721 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:17,721 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-10-17 10:27:17,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-10-17 10:27:17,721 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:17,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:17,722 INFO L85 PathProgramCache]: Analyzing trace with hash -654456506, now seen corresponding path program 1 times [2022-10-17 10:27:17,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:17,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595281408] [2022-10-17 10:27:17,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:17,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:17,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:17,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:17,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:27:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:17,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:27:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:17,887 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:27:17,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:17,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595281408] [2022-10-17 10:27:17,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595281408] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:27:17,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661420097] [2022-10-17 10:27:17,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:17,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:17,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:27:17,893 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:27:17,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-17 10:27:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:17,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-17 10:27:17,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:27:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:27:18,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:27:18,150 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:27:18,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661420097] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:27:18,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:27:18,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-10-17 10:27:18,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173945966] [2022-10-17 10:27:18,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:27:18,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:27:18,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:18,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:27:18,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:27:18,152 INFO L87 Difference]: Start difference. First operand 1065 states and 1374 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 8 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 10:27:18,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:18,778 INFO L93 Difference]: Finished difference Result 3170 states and 4156 transitions. [2022-10-17 10:27:18,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-17 10:27:18,779 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 8 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-10-17 10:27:18,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:18,796 INFO L225 Difference]: With dead ends: 3170 [2022-10-17 10:27:18,796 INFO L226 Difference]: Without dead ends: 2732 [2022-10-17 10:27:18,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 130 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-10-17 10:27:18,800 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 286 mSDsluCounter, 1577 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 1824 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:18,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 1824 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:27:18,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2022-10-17 10:27:18,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 1170. [2022-10-17 10:27:18,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1080 states have (on average 1.2361111111111112) internal successors, (1335), 1090 states have internal predecessors, (1335), 80 states have call successors, (80), 6 states have call predecessors, (80), 9 states have return successors, (88), 78 states have call predecessors, (88), 76 states have call successors, (88) [2022-10-17 10:27:18,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 1503 transitions. [2022-10-17 10:27:18,933 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 1503 transitions. Word has length 65 [2022-10-17 10:27:18,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:18,934 INFO L495 AbstractCegarLoop]: Abstraction has 1170 states and 1503 transitions. [2022-10-17 10:27:18,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 8 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 10:27:18,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 1503 transitions. [2022-10-17 10:27:18,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-10-17 10:27:18,937 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:18,938 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-10-17 10:27:18,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-17 10:27:19,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:19,153 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:19,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:19,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1951567048, now seen corresponding path program 1 times [2022-10-17 10:27:19,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:19,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878637968] [2022-10-17 10:27:19,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:19,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:19,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:19,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:19,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:27:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:19,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:27:19,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:19,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:27:19,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:19,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878637968] [2022-10-17 10:27:19,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878637968] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:27:19,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315615551] [2022-10-17 10:27:19,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:19,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:19,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:27:19,314 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:27:19,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-17 10:27:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:19,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-17 10:27:19,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:27:19,553 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 10:27:19,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:27:19,767 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 10:27:19,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315615551] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:27:19,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:27:19,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 18 [2022-10-17 10:27:19,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444615475] [2022-10-17 10:27:19,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:27:19,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-17 10:27:19,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:19,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-17 10:27:19,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:27:19,770 INFO L87 Difference]: Start difference. First operand 1170 states and 1503 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 16 states have internal predecessors, (76), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-17 10:27:20,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:20,960 INFO L93 Difference]: Finished difference Result 3318 states and 4373 transitions. [2022-10-17 10:27:20,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-10-17 10:27:20,960 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 16 states have internal predecessors, (76), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2022-10-17 10:27:20,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:21,001 INFO L225 Difference]: With dead ends: 3318 [2022-10-17 10:27:21,001 INFO L226 Difference]: Without dead ends: 2835 [2022-10-17 10:27:21,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=252, Invalid=1154, Unknown=0, NotChecked=0, Total=1406 [2022-10-17 10:27:21,005 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 610 mSDsluCounter, 2086 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 2300 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:21,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 2300 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-17 10:27:21,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2022-10-17 10:27:21,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 1230. [2022-10-17 10:27:21,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1138 states have (on average 1.2319859402460458) internal successors, (1402), 1146 states have internal predecessors, (1402), 81 states have call successors, (81), 6 states have call predecessors, (81), 10 states have return successors, (97), 82 states have call predecessors, (97), 77 states have call successors, (97) [2022-10-17 10:27:21,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 1580 transitions. [2022-10-17 10:27:21,147 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 1580 transitions. Word has length 65 [2022-10-17 10:27:21,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:21,148 INFO L495 AbstractCegarLoop]: Abstraction has 1230 states and 1580 transitions. [2022-10-17 10:27:21,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 16 states have internal predecessors, (76), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-17 10:27:21,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 1580 transitions. [2022-10-17 10:27:21,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-10-17 10:27:21,152 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:21,152 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-10-17 10:27:21,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-17 10:27:21,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:21,365 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:21,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:21,366 INFO L85 PathProgramCache]: Analyzing trace with hash -520443000, now seen corresponding path program 1 times [2022-10-17 10:27:21,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:21,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581096029] [2022-10-17 10:27:21,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:21,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:21,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:21,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:21,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:27:21,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:21,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:27:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:21,555 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:27:21,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:21,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581096029] [2022-10-17 10:27:21,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581096029] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:27:21,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419006120] [2022-10-17 10:27:21,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:21,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:21,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:27:21,558 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:27:21,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d95808d-6dc6-4203-8931-bf410f8dbd9a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-17 10:27:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:21,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 10:27:21,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:27:21,681 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:27:21,682 INFO L328 TraceCheckSpWp]: Computing backward predicates...