./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2018/Problem10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b75538a-235b-447f-ad61-43440b998d19/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b75538a-235b-447f-ad61-43440b998d19/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b75538a-235b-447f-ad61-43440b998d19/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b75538a-235b-447f-ad61-43440b998d19/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2018/Problem10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b75538a-235b-447f-ad61-43440b998d19/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b75538a-235b-447f-ad61-43440b998d19/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --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 aec1fafbe63132c51323898caadb7f7b777fc751b19e58e74eab1930ebd68833 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:41:47,547 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:41:47,638 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b75538a-235b-447f-ad61-43440b998d19/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:41:47,644 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:41:47,645 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:41:47,671 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:41:47,672 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:41:47,672 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:41:47,673 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:41:47,674 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:41:47,674 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:41:47,675 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:41:47,676 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:41:47,676 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:41:47,677 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:41:47,678 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:41:47,678 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:41:47,679 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:41:47,679 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:41:47,679 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:41:47,680 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:41:47,680 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:41:47,681 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:41:47,681 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:41:47,682 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:41:47,682 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:41:47,682 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:41:47,683 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:41:47,683 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:41:47,684 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:41:47,684 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:41:47,684 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:41:47,685 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:41:47,685 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:41:47,685 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:41:47,686 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:41:47,686 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:41:47,686 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:41:47,686 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:41:47,686 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:41:47,687 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:41:47,687 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:41:47,687 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_5b75538a-235b-447f-ad61-43440b998d19/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b75538a-235b-447f-ad61-43440b998d19/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aec1fafbe63132c51323898caadb7f7b777fc751b19e58e74eab1930ebd68833 [2023-11-26 10:41:47,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:41:47,991 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:41:47,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:41:47,995 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:41:47,996 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:41:47,997 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b75538a-235b-447f-ad61-43440b998d19/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/eca-rers2018/Problem10.c [2023-11-26 10:41:51,051 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:41:51,362 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:41:51,362 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b75538a-235b-447f-ad61-43440b998d19/sv-benchmarks/c/eca-rers2018/Problem10.c [2023-11-26 10:41:51,389 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b75538a-235b-447f-ad61-43440b998d19/bin/uautomizer-verify-VRDe98Ueme/data/dda7eac08/b65182ac109d4a358f4d4b0afc905a92/FLAGb32dc918a [2023-11-26 10:41:51,405 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b75538a-235b-447f-ad61-43440b998d19/bin/uautomizer-verify-VRDe98Ueme/data/dda7eac08/b65182ac109d4a358f4d4b0afc905a92 [2023-11-26 10:41:51,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:41:51,409 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:41:51,411 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:41:51,411 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:41:51,417 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:41:51,418 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:41:51" (1/1) ... [2023-11-26 10:41:51,419 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@476385f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:51, skipping insertion in model container [2023-11-26 10:41:51,419 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:41:51" (1/1) ... [2023-11-26 10:41:51,496 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:41:51,667 WARN L240 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_5b75538a-235b-447f-ad61-43440b998d19/sv-benchmarks/c/eca-rers2018/Problem10.c[778,791] [2023-11-26 10:41:51,674 WARN L240 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_5b75538a-235b-447f-ad61-43440b998d19/sv-benchmarks/c/eca-rers2018/Problem10.c[817,830] [2023-11-26 10:41:52,293 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:41:52,311 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:41:52,324 WARN L240 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_5b75538a-235b-447f-ad61-43440b998d19/sv-benchmarks/c/eca-rers2018/Problem10.c[778,791] [2023-11-26 10:41:52,325 WARN L240 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_5b75538a-235b-447f-ad61-43440b998d19/sv-benchmarks/c/eca-rers2018/Problem10.c[817,830] [2023-11-26 10:41:52,445 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:41:52,538 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:41:52,539 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:52 WrapperNode [2023-11-26 10:41:52,539 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:41:52,541 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:41:52,541 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:41:52,541 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:41:52,549 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:52" (1/1) ... [2023-11-26 10:41:52,574 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:52" (1/1) ... [2023-11-26 10:41:52,663 INFO L138 Inliner]: procedures = 274, calls = 248, calls flagged for inlining = 144, calls inlined = 144, statements flattened = 866 [2023-11-26 10:41:52,664 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:41:52,664 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:41:52,665 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:41:52,665 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:41:52,691 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:52" (1/1) ... [2023-11-26 10:41:52,692 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:52" (1/1) ... [2023-11-26 10:41:52,699 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:52" (1/1) ... [2023-11-26 10:41:52,756 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 10:41:52,757 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:52" (1/1) ... [2023-11-26 10:41:52,757 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:52" (1/1) ... [2023-11-26 10:41:52,799 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:52" (1/1) ... [2023-11-26 10:41:52,817 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:52" (1/1) ... [2023-11-26 10:41:52,835 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:52" (1/1) ... [2023-11-26 10:41:52,848 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:52" (1/1) ... [2023-11-26 10:41:52,856 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:41:52,858 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:41:52,859 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:41:52,859 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:41:52,860 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:52" (1/1) ... [2023-11-26 10:41:52,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:41:52,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b75538a-235b-447f-ad61-43440b998d19/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:52,895 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b75538a-235b-447f-ad61-43440b998d19/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:41:52,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b75538a-235b-447f-ad61-43440b998d19/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:41:52,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:41:52,946 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2023-11-26 10:41:52,947 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2023-11-26 10:41:52,947 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2023-11-26 10:41:52,947 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2023-11-26 10:41:52,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:41:52,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:41:52,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:41:53,089 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:41:53,091 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:41:54,305 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:41:54,340 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:41:54,341 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 10:41:54,341 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:41:54 BoogieIcfgContainer [2023-11-26 10:41:54,341 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:41:54,344 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:41:54,344 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:41:54,348 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:41:54,348 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:41:51" (1/3) ... [2023-11-26 10:41:54,349 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f6aad7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:41:54, skipping insertion in model container [2023-11-26 10:41:54,349 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:52" (2/3) ... [2023-11-26 10:41:54,349 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f6aad7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:41:54, skipping insertion in model container [2023-11-26 10:41:54,349 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:41:54" (3/3) ... [2023-11-26 10:41:54,351 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem10.c [2023-11-26 10:41:54,372 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:41:54,372 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-26 10:41:54,438 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:41:54,445 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=LoopHeads, 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;@6c8c1498, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:41:54,446 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-26 10:41:54,453 INFO L276 IsEmpty]: Start isEmpty. Operand has 463 states, 358 states have (on average 1.600558659217877) internal successors, (573), 360 states have internal predecessors, (573), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2023-11-26 10:41:54,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-26 10:41:54,464 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:54,465 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:54,465 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:41:54,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:54,470 INFO L85 PathProgramCache]: Analyzing trace with hash -973882549, now seen corresponding path program 1 times [2023-11-26 10:41:54,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:54,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597843271] [2023-11-26 10:41:54,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:54,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:54,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:54,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597843271] [2023-11-26 10:41:54,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597843271] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:54,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:54,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:41:54,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199114451] [2023-11-26 10:41:54,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:54,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:41:54,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:54,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:41:54,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:41:54,809 INFO L87 Difference]: Start difference. First operand has 463 states, 358 states have (on average 1.600558659217877) internal successors, (573), 360 states have internal predecessors, (573), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:56,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:56,183 INFO L93 Difference]: Finished difference Result 1154 states and 2058 transitions. [2023-11-26 10:41:56,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:41:56,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-26 10:41:56,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:56,210 INFO L225 Difference]: With dead ends: 1154 [2023-11-26 10:41:56,210 INFO L226 Difference]: Without dead ends: 686 [2023-11-26 10:41:56,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:41:56,227 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 570 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:56,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 639 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-26 10:41:56,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2023-11-26 10:41:56,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 554. [2023-11-26 10:41:56,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 452 states have (on average 1.592920353982301) internal successors, (720), 551 states have internal predecessors, (720), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:56,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 820 transitions. [2023-11-26 10:41:56,333 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 820 transitions. Word has length 12 [2023-11-26 10:41:56,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:56,334 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 820 transitions. [2023-11-26 10:41:56,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:56,335 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 820 transitions. [2023-11-26 10:41:56,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-26 10:41:56,340 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:56,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:56,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:41:56,341 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:41:56,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:56,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1176212298, now seen corresponding path program 1 times [2023-11-26 10:41:56,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:56,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724314058] [2023-11-26 10:41:56,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:56,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:56,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:56,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724314058] [2023-11-26 10:41:56,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724314058] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:56,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:56,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:41:56,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116789788] [2023-11-26 10:41:56,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:56,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:41:56,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:56,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:41:56,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:41:56,479 INFO L87 Difference]: Start difference. First operand 554 states and 820 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:57,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:57,463 INFO L93 Difference]: Finished difference Result 1696 states and 2574 transitions. [2023-11-26 10:41:57,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:41:57,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-26 10:41:57,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:57,470 INFO L225 Difference]: With dead ends: 1696 [2023-11-26 10:41:57,470 INFO L226 Difference]: Without dead ends: 1143 [2023-11-26 10:41:57,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:41:57,474 INFO L413 NwaCegarLoop]: 530 mSDtfsCounter, 855 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 1108 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:57,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [855 Valid, 1108 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 10:41:57,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2023-11-26 10:41:57,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 883. [2023-11-26 10:41:57,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 781 states have (on average 1.555697823303457) internal successors, (1215), 880 states have internal predecessors, (1215), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:57,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1315 transitions. [2023-11-26 10:41:57,518 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1315 transitions. Word has length 20 [2023-11-26 10:41:57,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:57,518 INFO L495 AbstractCegarLoop]: Abstraction has 883 states and 1315 transitions. [2023-11-26 10:41:57,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:57,519 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1315 transitions. [2023-11-26 10:41:57,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-26 10:41:57,520 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:57,520 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:57,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:41:57,521 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:41:57,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:57,521 INFO L85 PathProgramCache]: Analyzing trace with hash 388531602, now seen corresponding path program 1 times [2023-11-26 10:41:57,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:57,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370398873] [2023-11-26 10:41:57,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:57,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:57,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:57,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:57,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:57,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370398873] [2023-11-26 10:41:57,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370398873] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:57,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:57,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:41:57,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203050912] [2023-11-26 10:41:57,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:57,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:41:57,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:57,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:41:57,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:41:57,792 INFO L87 Difference]: Start difference. First operand 883 states and 1315 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:57,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:57,839 INFO L93 Difference]: Finished difference Result 1766 states and 2630 transitions. [2023-11-26 10:41:57,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:41:57,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-26 10:41:57,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:57,846 INFO L225 Difference]: With dead ends: 1766 [2023-11-26 10:41:57,846 INFO L226 Difference]: Without dead ends: 884 [2023-11-26 10:41:57,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:41:57,850 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 3 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:57,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1119 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:41:57,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2023-11-26 10:41:57,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 883. [2023-11-26 10:41:57,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 781 states have (on average 1.5544174135723432) internal successors, (1214), 880 states have internal predecessors, (1214), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:57,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1314 transitions. [2023-11-26 10:41:57,883 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1314 transitions. Word has length 23 [2023-11-26 10:41:57,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:57,884 INFO L495 AbstractCegarLoop]: Abstraction has 883 states and 1314 transitions. [2023-11-26 10:41:57,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:57,884 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1314 transitions. [2023-11-26 10:41:57,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-26 10:41:57,885 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:57,885 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:57,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:41:57,886 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:41:57,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:57,886 INFO L85 PathProgramCache]: Analyzing trace with hash 646697040, now seen corresponding path program 1 times [2023-11-26 10:41:57,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:57,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914338778] [2023-11-26 10:41:57,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:57,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:57,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:57,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:57,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914338778] [2023-11-26 10:41:57,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914338778] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:57,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:57,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:41:57,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575831012] [2023-11-26 10:41:57,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:57,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:41:57,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:57,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:41:57,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:41:57,939 INFO L87 Difference]: Start difference. First operand 883 states and 1314 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:58,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:58,187 INFO L93 Difference]: Finished difference Result 2190 states and 3254 transitions. [2023-11-26 10:41:58,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:41:58,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-26 10:41:58,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:58,195 INFO L225 Difference]: With dead ends: 2190 [2023-11-26 10:41:58,196 INFO L226 Difference]: Without dead ends: 1308 [2023-11-26 10:41:58,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:41:58,200 INFO L413 NwaCegarLoop]: 935 mSDtfsCounter, 532 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:58,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 1373 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:41:58,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2023-11-26 10:41:58,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1224. [2023-11-26 10:41:58,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1122 states have (on average 1.552584670231729) internal successors, (1742), 1221 states have internal predecessors, (1742), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:58,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1842 transitions. [2023-11-26 10:41:58,254 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1842 transitions. Word has length 23 [2023-11-26 10:41:58,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:58,254 INFO L495 AbstractCegarLoop]: Abstraction has 1224 states and 1842 transitions. [2023-11-26 10:41:58,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:58,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1842 transitions. [2023-11-26 10:41:58,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-26 10:41:58,256 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:58,256 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:58,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:41:58,257 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:41:58,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:58,258 INFO L85 PathProgramCache]: Analyzing trace with hash -198274412, now seen corresponding path program 1 times [2023-11-26 10:41:58,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:58,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630647169] [2023-11-26 10:41:58,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:58,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:58,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:58,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:58,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630647169] [2023-11-26 10:41:58,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630647169] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:58,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:58,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:41:58,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112573079] [2023-11-26 10:41:58,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:58,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:41:58,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:58,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:41:58,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:41:58,398 INFO L87 Difference]: Start difference. First operand 1224 states and 1842 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:59,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:59,083 INFO L93 Difference]: Finished difference Result 3151 states and 4814 transitions. [2023-11-26 10:41:59,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:41:59,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-26 10:41:59,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:59,094 INFO L225 Difference]: With dead ends: 3151 [2023-11-26 10:41:59,095 INFO L226 Difference]: Without dead ends: 1928 [2023-11-26 10:41:59,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:41:59,099 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 309 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:59,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 792 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 10:41:59,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2023-11-26 10:41:59,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1390. [2023-11-26 10:41:59,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1288 states have (on average 1.454192546583851) internal successors, (1873), 1387 states have internal predecessors, (1873), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:59,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 1973 transitions. [2023-11-26 10:41:59,155 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 1973 transitions. Word has length 23 [2023-11-26 10:41:59,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:59,155 INFO L495 AbstractCegarLoop]: Abstraction has 1390 states and 1973 transitions. [2023-11-26 10:41:59,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:59,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 1973 transitions. [2023-11-26 10:41:59,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-26 10:41:59,157 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:59,157 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:59,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 10:41:59,157 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:41:59,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:59,158 INFO L85 PathProgramCache]: Analyzing trace with hash 502790166, now seen corresponding path program 1 times [2023-11-26 10:41:59,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:59,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847718602] [2023-11-26 10:41:59,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:59,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:59,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:59,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:59,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847718602] [2023-11-26 10:41:59,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847718602] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:59,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:59,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:41:59,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627202102] [2023-11-26 10:41:59,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:59,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:41:59,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:59,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:41:59,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:41:59,233 INFO L87 Difference]: Start difference. First operand 1390 states and 1973 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:59,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:59,425 INFO L93 Difference]: Finished difference Result 4121 states and 5861 transitions. [2023-11-26 10:41:59,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:41:59,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-26 10:41:59,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:59,442 INFO L225 Difference]: With dead ends: 4121 [2023-11-26 10:41:59,442 INFO L226 Difference]: Without dead ends: 2732 [2023-11-26 10:41:59,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:41:59,446 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 509 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:59,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 1067 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:41:59,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2023-11-26 10:41:59,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 2644. [2023-11-26 10:41:59,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2644 states, 2542 states have (on average 1.43705743509048) internal successors, (3653), 2641 states have internal predecessors, (3653), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:59,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2644 states to 2644 states and 3753 transitions. [2023-11-26 10:41:59,534 INFO L78 Accepts]: Start accepts. Automaton has 2644 states and 3753 transitions. Word has length 23 [2023-11-26 10:41:59,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:59,535 INFO L495 AbstractCegarLoop]: Abstraction has 2644 states and 3753 transitions. [2023-11-26 10:41:59,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:59,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2644 states and 3753 transitions. [2023-11-26 10:41:59,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-26 10:41:59,536 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:59,536 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:59,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 10:41:59,537 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:41:59,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:59,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1594090992, now seen corresponding path program 1 times [2023-11-26 10:41:59,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:59,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390109224] [2023-11-26 10:41:59,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:59,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:59,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:59,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:59,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390109224] [2023-11-26 10:41:59,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390109224] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:59,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:59,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:41:59,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253107317] [2023-11-26 10:41:59,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:59,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:41:59,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:59,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:41:59,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:41:59,582 INFO L87 Difference]: Start difference. First operand 2644 states and 3753 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:00,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:00,242 INFO L93 Difference]: Finished difference Result 6112 states and 8877 transitions. [2023-11-26 10:42:00,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:00,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-26 10:42:00,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:00,262 INFO L225 Difference]: With dead ends: 6112 [2023-11-26 10:42:00,262 INFO L226 Difference]: Without dead ends: 3469 [2023-11-26 10:42:00,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:00,269 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 229 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:00,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 713 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 10:42:00,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2023-11-26 10:42:00,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 3465. [2023-11-26 10:42:00,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3465 states, 3363 states have (on average 1.376746952126078) internal successors, (4630), 3462 states have internal predecessors, (4630), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:00,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3465 states to 3465 states and 4730 transitions. [2023-11-26 10:42:00,389 INFO L78 Accepts]: Start accepts. Automaton has 3465 states and 4730 transitions. Word has length 24 [2023-11-26 10:42:00,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:00,390 INFO L495 AbstractCegarLoop]: Abstraction has 3465 states and 4730 transitions. [2023-11-26 10:42:00,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:00,390 INFO L276 IsEmpty]: Start isEmpty. Operand 3465 states and 4730 transitions. [2023-11-26 10:42:00,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-26 10:42:00,391 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:00,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:00,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 10:42:00,392 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:00,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:00,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1855904852, now seen corresponding path program 1 times [2023-11-26 10:42:00,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:00,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432255353] [2023-11-26 10:42:00,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:00,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:00,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:00,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:00,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432255353] [2023-11-26 10:42:00,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432255353] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:00,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:00,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:42:00,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348839015] [2023-11-26 10:42:00,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:00,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:00,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:00,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:00,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:00,483 INFO L87 Difference]: Start difference. First operand 3465 states and 4730 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:01,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:01,276 INFO L93 Difference]: Finished difference Result 7770 states and 10847 transitions. [2023-11-26 10:42:01,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:01,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-26 10:42:01,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:01,301 INFO L225 Difference]: With dead ends: 7770 [2023-11-26 10:42:01,301 INFO L226 Difference]: Without dead ends: 4306 [2023-11-26 10:42:01,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:01,308 INFO L413 NwaCegarLoop]: 512 mSDtfsCounter, 298 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:01,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 673 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 10:42:01,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4306 states. [2023-11-26 10:42:01,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4306 to 4302. [2023-11-26 10:42:01,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4302 states, 4200 states have (on average 1.355952380952381) internal successors, (5695), 4299 states have internal predecessors, (5695), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:01,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4302 states to 4302 states and 5795 transitions. [2023-11-26 10:42:01,429 INFO L78 Accepts]: Start accepts. Automaton has 4302 states and 5795 transitions. Word has length 24 [2023-11-26 10:42:01,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:01,430 INFO L495 AbstractCegarLoop]: Abstraction has 4302 states and 5795 transitions. [2023-11-26 10:42:01,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:01,430 INFO L276 IsEmpty]: Start isEmpty. Operand 4302 states and 5795 transitions. [2023-11-26 10:42:01,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 10:42:01,433 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:01,433 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:01,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 10:42:01,434 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:01,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:01,434 INFO L85 PathProgramCache]: Analyzing trace with hash 2122076635, now seen corresponding path program 1 times [2023-11-26 10:42:01,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:01,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668915318] [2023-11-26 10:42:01,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:01,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:01,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:01,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:01,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668915318] [2023-11-26 10:42:01,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668915318] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:01,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:01,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:42:01,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996330888] [2023-11-26 10:42:01,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:01,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:01,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:01,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:01,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:01,495 INFO L87 Difference]: Start difference. First operand 4302 states and 5795 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:01,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:01,647 INFO L93 Difference]: Finished difference Result 8500 states and 11460 transitions. [2023-11-26 10:42:01,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:01,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-26 10:42:01,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:01,708 INFO L225 Difference]: With dead ends: 8500 [2023-11-26 10:42:01,708 INFO L226 Difference]: Without dead ends: 8493 [2023-11-26 10:42:01,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:01,712 INFO L413 NwaCegarLoop]: 999 mSDtfsCounter, 547 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 1546 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:01,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 1546 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:42:01,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8493 states. [2023-11-26 10:42:01,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8493 to 8392. [2023-11-26 10:42:01,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8392 states, 8290 states have (on average 1.351266586248492) internal successors, (11202), 8389 states have internal predecessors, (11202), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:01,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8392 states to 8392 states and 11302 transitions. [2023-11-26 10:42:01,954 INFO L78 Accepts]: Start accepts. Automaton has 8392 states and 11302 transitions. Word has length 25 [2023-11-26 10:42:01,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:01,956 INFO L495 AbstractCegarLoop]: Abstraction has 8392 states and 11302 transitions. [2023-11-26 10:42:01,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:01,956 INFO L276 IsEmpty]: Start isEmpty. Operand 8392 states and 11302 transitions. [2023-11-26 10:42:01,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 10:42:01,957 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:01,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:01,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 10:42:01,958 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:01,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:01,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1697765399, now seen corresponding path program 1 times [2023-11-26 10:42:01,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:01,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975048364] [2023-11-26 10:42:01,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:01,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:01,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:02,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:02,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:02,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975048364] [2023-11-26 10:42:02,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975048364] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:02,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:02,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:42:02,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933189099] [2023-11-26 10:42:02,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:02,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:02,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:02,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:02,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:02,024 INFO L87 Difference]: Start difference. First operand 8392 states and 11302 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:02,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:02,325 INFO L93 Difference]: Finished difference Result 16882 states and 22700 transitions. [2023-11-26 10:42:02,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:02,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-26 10:42:02,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:02,352 INFO L225 Difference]: With dead ends: 16882 [2023-11-26 10:42:02,353 INFO L226 Difference]: Without dead ends: 8491 [2023-11-26 10:42:02,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:02,365 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 532 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:02,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 1203 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:42:02,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8491 states. [2023-11-26 10:42:02,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8491 to 8390. [2023-11-26 10:42:02,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8390 states, 8290 states have (on average 1.3462002412545235) internal successors, (11160), 8387 states have internal predecessors, (11160), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:02,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8390 states to 8390 states and 11258 transitions. [2023-11-26 10:42:02,647 INFO L78 Accepts]: Start accepts. Automaton has 8390 states and 11258 transitions. Word has length 25 [2023-11-26 10:42:02,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:02,647 INFO L495 AbstractCegarLoop]: Abstraction has 8390 states and 11258 transitions. [2023-11-26 10:42:02,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:02,648 INFO L276 IsEmpty]: Start isEmpty. Operand 8390 states and 11258 transitions. [2023-11-26 10:42:02,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-26 10:42:02,649 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:02,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:02,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 10:42:02,649 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:02,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:02,650 INFO L85 PathProgramCache]: Analyzing trace with hash -816320605, now seen corresponding path program 1 times [2023-11-26 10:42:02,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:02,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530915757] [2023-11-26 10:42:02,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:02,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:02,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:02,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:02,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530915757] [2023-11-26 10:42:02,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530915757] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:02,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:02,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:42:02,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942401038] [2023-11-26 10:42:02,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:02,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:02,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:02,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:02,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:02,720 INFO L87 Difference]: Start difference. First operand 8390 states and 11258 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:03,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:03,053 INFO L93 Difference]: Finished difference Result 24997 states and 33577 transitions. [2023-11-26 10:42:03,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:03,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-26 10:42:03,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:03,094 INFO L225 Difference]: With dead ends: 24997 [2023-11-26 10:42:03,094 INFO L226 Difference]: Without dead ends: 16608 [2023-11-26 10:42:03,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:03,106 INFO L413 NwaCegarLoop]: 558 mSDtfsCounter, 525 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:03,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 1102 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:42:03,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16608 states. [2023-11-26 10:42:03,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16608 to 16510. [2023-11-26 10:42:03,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16510 states, 16410 states have (on average 1.3410115783059111) internal successors, (22006), 16507 states have internal predecessors, (22006), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:03,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16510 states to 16510 states and 22104 transitions. [2023-11-26 10:42:03,545 INFO L78 Accepts]: Start accepts. Automaton has 16510 states and 22104 transitions. Word has length 27 [2023-11-26 10:42:03,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:03,546 INFO L495 AbstractCegarLoop]: Abstraction has 16510 states and 22104 transitions. [2023-11-26 10:42:03,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:03,546 INFO L276 IsEmpty]: Start isEmpty. Operand 16510 states and 22104 transitions. [2023-11-26 10:42:03,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-26 10:42:03,547 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:03,547 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:03,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 10:42:03,548 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:03,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:03,548 INFO L85 PathProgramCache]: Analyzing trace with hash 682758120, now seen corresponding path program 1 times [2023-11-26 10:42:03,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:03,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345608642] [2023-11-26 10:42:03,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:03,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:03,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:03,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:03,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345608642] [2023-11-26 10:42:03,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345608642] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:03,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:03,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:42:03,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724108566] [2023-11-26 10:42:03,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:03,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:03,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:03,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:03,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:03,593 INFO L87 Difference]: Start difference. First operand 16510 states and 22104 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:04,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:04,086 INFO L93 Difference]: Finished difference Result 47949 states and 64443 transitions. [2023-11-26 10:42:04,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:04,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-26 10:42:04,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:04,156 INFO L225 Difference]: With dead ends: 47949 [2023-11-26 10:42:04,156 INFO L226 Difference]: Without dead ends: 31440 [2023-11-26 10:42:04,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:04,183 INFO L413 NwaCegarLoop]: 852 mSDtfsCounter, 503 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 1343 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:04,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 1343 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:42:04,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31440 states. [2023-11-26 10:42:04,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31440 to 31351. [2023-11-26 10:42:05,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31351 states, 31251 states have (on average 1.3338133179738247) internal successors, (41683), 31348 states have internal predecessors, (41683), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:05,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31351 states to 31351 states and 41781 transitions. [2023-11-26 10:42:05,088 INFO L78 Accepts]: Start accepts. Automaton has 31351 states and 41781 transitions. Word has length 32 [2023-11-26 10:42:05,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:05,089 INFO L495 AbstractCegarLoop]: Abstraction has 31351 states and 41781 transitions. [2023-11-26 10:42:05,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:05,089 INFO L276 IsEmpty]: Start isEmpty. Operand 31351 states and 41781 transitions. [2023-11-26 10:42:05,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-26 10:42:05,090 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:05,090 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:05,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 10:42:05,091 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:05,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:05,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1918149547, now seen corresponding path program 1 times [2023-11-26 10:42:05,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:05,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625861103] [2023-11-26 10:42:05,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:05,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:05,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:05,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:05,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625861103] [2023-11-26 10:42:05,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625861103] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:05,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:05,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:42:05,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247605904] [2023-11-26 10:42:05,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:05,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:05,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:05,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:05,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:05,148 INFO L87 Difference]: Start difference. First operand 31351 states and 41781 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:05,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:05,975 INFO L93 Difference]: Finished difference Result 72726 states and 96960 transitions. [2023-11-26 10:42:05,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:05,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-11-26 10:42:05,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:06,079 INFO L225 Difference]: With dead ends: 72726 [2023-11-26 10:42:06,079 INFO L226 Difference]: Without dead ends: 41376 [2023-11-26 10:42:06,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:06,118 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 481 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:06,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 959 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:42:06,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41376 states. [2023-11-26 10:42:07,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41376 to 41294. [2023-11-26 10:42:07,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41294 states, 41194 states have (on average 1.3173277661795406) internal successors, (54266), 41291 states have internal predecessors, (54266), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:07,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41294 states to 41294 states and 54364 transitions. [2023-11-26 10:42:07,332 INFO L78 Accepts]: Start accepts. Automaton has 41294 states and 54364 transitions. Word has length 33 [2023-11-26 10:42:07,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:07,333 INFO L495 AbstractCegarLoop]: Abstraction has 41294 states and 54364 transitions. [2023-11-26 10:42:07,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:07,333 INFO L276 IsEmpty]: Start isEmpty. Operand 41294 states and 54364 transitions. [2023-11-26 10:42:07,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-26 10:42:07,334 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:07,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:07,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 10:42:07,335 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:07,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:07,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1695664578, now seen corresponding path program 1 times [2023-11-26 10:42:07,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:07,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050780899] [2023-11-26 10:42:07,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:07,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:07,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:07,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:07,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050780899] [2023-11-26 10:42:07,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050780899] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:07,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:07,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:42:07,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191764142] [2023-11-26 10:42:07,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:07,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:07,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:07,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:07,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:07,426 INFO L87 Difference]: Start difference. First operand 41294 states and 54364 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:08,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:08,573 INFO L93 Difference]: Finished difference Result 104785 states and 137715 transitions. [2023-11-26 10:42:08,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:08,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-26 10:42:08,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:08,925 INFO L225 Difference]: With dead ends: 104785 [2023-11-26 10:42:08,925 INFO L226 Difference]: Without dead ends: 63492 [2023-11-26 10:42:08,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:08,957 INFO L413 NwaCegarLoop]: 974 mSDtfsCounter, 439 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 1436 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:08,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 1436 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:42:09,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63492 states. [2023-11-26 10:42:09,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63492 to 59564. [2023-11-26 10:42:10,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59564 states, 59464 states have (on average 1.2840542176779228) internal successors, (76355), 59561 states have internal predecessors, (76355), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:10,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59564 states to 59564 states and 76453 transitions. [2023-11-26 10:42:10,371 INFO L78 Accepts]: Start accepts. Automaton has 59564 states and 76453 transitions. Word has length 39 [2023-11-26 10:42:10,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:10,372 INFO L495 AbstractCegarLoop]: Abstraction has 59564 states and 76453 transitions. [2023-11-26 10:42:10,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:10,372 INFO L276 IsEmpty]: Start isEmpty. Operand 59564 states and 76453 transitions. [2023-11-26 10:42:10,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-26 10:42:10,373 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:10,373 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:10,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 10:42:10,374 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:10,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:10,375 INFO L85 PathProgramCache]: Analyzing trace with hash 166601594, now seen corresponding path program 1 times [2023-11-26 10:42:10,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:10,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886217069] [2023-11-26 10:42:10,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:10,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:10,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:10,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886217069] [2023-11-26 10:42:10,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886217069] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:10,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:10,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:42:10,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041247307] [2023-11-26 10:42:10,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:10,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:10,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:10,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:10,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:10,436 INFO L87 Difference]: Start difference. First operand 59564 states and 76453 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:11,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:11,747 INFO L93 Difference]: Finished difference Result 156090 states and 201786 transitions. [2023-11-26 10:42:11,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:11,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-26 10:42:11,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:12,001 INFO L225 Difference]: With dead ends: 156090 [2023-11-26 10:42:12,001 INFO L226 Difference]: Without dead ends: 96527 [2023-11-26 10:42:12,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:12,069 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 449 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:12,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 978 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:42:12,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96527 states. [2023-11-26 10:42:13,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96527 to 96448. [2023-11-26 10:42:14,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96448 states, 96348 states have (on average 1.276445800639349) internal successors, (122983), 96445 states have internal predecessors, (122983), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:14,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96448 states to 96448 states and 123081 transitions. [2023-11-26 10:42:14,767 INFO L78 Accepts]: Start accepts. Automaton has 96448 states and 123081 transitions. Word has length 39 [2023-11-26 10:42:14,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:14,767 INFO L495 AbstractCegarLoop]: Abstraction has 96448 states and 123081 transitions. [2023-11-26 10:42:14,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:14,768 INFO L276 IsEmpty]: Start isEmpty. Operand 96448 states and 123081 transitions. [2023-11-26 10:42:14,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-26 10:42:14,769 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:14,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:14,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-26 10:42:14,770 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:14,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:14,773 INFO L85 PathProgramCache]: Analyzing trace with hash -47031098, now seen corresponding path program 1 times [2023-11-26 10:42:14,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:14,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392135860] [2023-11-26 10:42:14,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:14,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:14,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:14,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:14,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392135860] [2023-11-26 10:42:14,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392135860] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:14,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:14,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:42:14,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061377261] [2023-11-26 10:42:14,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:14,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:14,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:14,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:14,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:14,900 INFO L87 Difference]: Start difference. First operand 96448 states and 123081 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:16,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:16,310 INFO L93 Difference]: Finished difference Result 172891 states and 219988 transitions. [2023-11-26 10:42:16,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:16,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-11-26 10:42:16,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:17,039 INFO L225 Difference]: With dead ends: 172891 [2023-11-26 10:42:17,040 INFO L226 Difference]: Without dead ends: 172888 [2023-11-26 10:42:17,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:17,084 INFO L413 NwaCegarLoop]: 1030 mSDtfsCounter, 526 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 1567 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:17,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 1567 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:42:17,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172888 states. [2023-11-26 10:42:19,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172888 to 172668. [2023-11-26 10:42:19,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172668 states, 172568 states have (on average 1.2715393352185804) internal successors, (219427), 172665 states have internal predecessors, (219427), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:20,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172668 states to 172668 states and 219525 transitions. [2023-11-26 10:42:20,768 INFO L78 Accepts]: Start accepts. Automaton has 172668 states and 219525 transitions. Word has length 44 [2023-11-26 10:42:20,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:20,768 INFO L495 AbstractCegarLoop]: Abstraction has 172668 states and 219525 transitions. [2023-11-26 10:42:20,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:20,769 INFO L276 IsEmpty]: Start isEmpty. Operand 172668 states and 219525 transitions. [2023-11-26 10:42:20,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-26 10:42:20,770 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:20,770 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:20,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-26 10:42:20,771 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:20,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:20,771 INFO L85 PathProgramCache]: Analyzing trace with hash 2000323693, now seen corresponding path program 1 times [2023-11-26 10:42:20,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:20,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794974806] [2023-11-26 10:42:20,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:20,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:20,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:20,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:20,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794974806] [2023-11-26 10:42:20,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794974806] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:20,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:20,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:42:20,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390245012] [2023-11-26 10:42:20,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:20,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:42:20,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:20,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:42:20,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:42:20,958 INFO L87 Difference]: Start difference. First operand 172668 states and 219525 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:24,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:24,211 INFO L93 Difference]: Finished difference Result 451351 states and 573250 transitions. [2023-11-26 10:42:24,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:42:24,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-11-26 10:42:24,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:24,787 INFO L225 Difference]: With dead ends: 451351 [2023-11-26 10:42:24,787 INFO L226 Difference]: Without dead ends: 278684 [2023-11-26 10:42:24,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:42:24,899 INFO L413 NwaCegarLoop]: 578 mSDtfsCounter, 862 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:24,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [862 Valid, 717 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-26 10:42:25,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278684 states. [2023-11-26 10:42:28,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278684 to 172663. [2023-11-26 10:42:28,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172663 states, 172568 states have (on average 1.2614563534374854) internal successors, (217687), 172660 states have internal predecessors, (217687), 93 states have call successors, (93), 2 states have call predecessors, (93), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:28,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172663 states to 172663 states and 217780 transitions. [2023-11-26 10:42:28,945 INFO L78 Accepts]: Start accepts. Automaton has 172663 states and 217780 transitions. Word has length 47 [2023-11-26 10:42:28,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:28,947 INFO L495 AbstractCegarLoop]: Abstraction has 172663 states and 217780 transitions. [2023-11-26 10:42:28,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:28,948 INFO L276 IsEmpty]: Start isEmpty. Operand 172663 states and 217780 transitions. [2023-11-26 10:42:28,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-26 10:42:28,948 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:28,948 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:28,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-26 10:42:28,949 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:28,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:28,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1428399207, now seen corresponding path program 1 times [2023-11-26 10:42:28,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:28,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902319370] [2023-11-26 10:42:28,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:28,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:28,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:29,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:29,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:29,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902319370] [2023-11-26 10:42:29,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902319370] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:29,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:29,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:42:29,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684719658] [2023-11-26 10:42:29,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:29,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:29,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:29,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:29,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:29,018 INFO L87 Difference]: Start difference. First operand 172663 states and 217780 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:31,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:31,351 INFO L93 Difference]: Finished difference Result 341099 states and 430506 transitions. [2023-11-26 10:42:31,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:31,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-11-26 10:42:31,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:31,650 INFO L225 Difference]: With dead ends: 341099 [2023-11-26 10:42:31,651 INFO L226 Difference]: Without dead ends: 168437 [2023-11-26 10:42:31,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:31,747 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 387 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:31,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 355 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:42:31,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168437 states.