./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label28.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label28.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 480af262cda4397eeb9e570da47990ce157a2b110ec643ba069b0968d8ba36a6 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 09:31:02,983 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 09:31:02,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 09:31:03,006 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 09:31:03,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 09:31:03,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 09:31:03,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 09:31:03,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 09:31:03,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 09:31:03,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 09:31:03,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 09:31:03,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 09:31:03,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 09:31:03,017 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 09:31:03,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 09:31:03,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 09:31:03,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 09:31:03,024 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 09:31:03,026 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 09:31:03,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 09:31:03,029 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 09:31:03,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 09:31:03,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 09:31:03,038 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 09:31:03,042 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 09:31:03,042 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 09:31:03,042 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 09:31:03,043 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 09:31:03,044 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 09:31:03,045 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 09:31:03,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 09:31:03,046 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 09:31:03,047 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 09:31:03,055 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 09:31:03,057 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 09:31:03,057 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 09:31:03,058 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 09:31:03,058 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 09:31:03,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 09:31:03,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 09:31:03,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 09:31:03,063 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 09:31:03,109 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 09:31:03,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 09:31:03,109 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 09:31:03,110 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 09:31:03,110 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 09:31:03,111 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 09:31:03,111 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 09:31:03,111 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 09:31:03,112 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 09:31:03,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 09:31:03,113 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 09:31:03,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 09:31:03,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 09:31:03,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 09:31:03,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 09:31:03,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 09:31:03,114 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 09:31:03,114 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 09:31:03,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 09:31:03,115 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 09:31:03,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 09:31:03,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 09:31:03,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 09:31:03,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 09:31:03,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:31:03,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 09:31:03,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 09:31:03,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 09:31:03,117 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 09:31:03,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 09:31:03,117 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 09:31:03,118 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 09:31:03,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 09:31:03,118 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 480af262cda4397eeb9e570da47990ce157a2b110ec643ba069b0968d8ba36a6 [2022-11-20 09:31:03,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 09:31:03,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 09:31:03,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 09:31:03,478 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 09:31:03,478 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 09:31:03,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/eca-rers2012/Problem03_label28.c [2022-11-20 09:31:06,477 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 09:31:06,873 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 09:31:06,873 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/sv-benchmarks/c/eca-rers2012/Problem03_label28.c [2022-11-20 09:31:06,891 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/data/64d854fd8/24b6f7927f554214866cdc5c42016110/FLAG78323c30f [2022-11-20 09:31:06,909 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/data/64d854fd8/24b6f7927f554214866cdc5c42016110 [2022-11-20 09:31:06,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 09:31:06,915 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 09:31:06,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 09:31:06,920 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 09:31:06,924 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 09:31:06,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:31:06" (1/1) ... [2022-11-20 09:31:06,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cc0dcfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:06, skipping insertion in model container [2022-11-20 09:31:06,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:31:06" (1/1) ... [2022-11-20 09:31:06,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 09:31:07,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:31:07,708 WARN L237 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_41f66db8-0a65-4713-b94e-c8ae4c014428/sv-benchmarks/c/eca-rers2012/Problem03_label28.c[54731,54744] [2022-11-20 09:31:07,750 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:31:07,761 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 09:31:08,069 WARN L237 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_41f66db8-0a65-4713-b94e-c8ae4c014428/sv-benchmarks/c/eca-rers2012/Problem03_label28.c[54731,54744] [2022-11-20 09:31:08,091 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:31:08,111 INFO L208 MainTranslator]: Completed translation [2022-11-20 09:31:08,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:08 WrapperNode [2022-11-20 09:31:08,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 09:31:08,113 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 09:31:08,113 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 09:31:08,113 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 09:31:08,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:08" (1/1) ... [2022-11-20 09:31:08,154 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:08" (1/1) ... [2022-11-20 09:31:08,256 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-20 09:31:08,256 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 09:31:08,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 09:31:08,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 09:31:08,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 09:31:08,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:08" (1/1) ... [2022-11-20 09:31:08,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:08" (1/1) ... [2022-11-20 09:31:08,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:08" (1/1) ... [2022-11-20 09:31:08,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:08" (1/1) ... [2022-11-20 09:31:08,330 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:08" (1/1) ... [2022-11-20 09:31:08,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:08" (1/1) ... [2022-11-20 09:31:08,372 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:08" (1/1) ... [2022-11-20 09:31:08,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:08" (1/1) ... [2022-11-20 09:31:08,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 09:31:08,395 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 09:31:08,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 09:31:08,396 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 09:31:08,397 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:08" (1/1) ... [2022-11-20 09:31:08,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:31:08,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:08,428 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 09:31:08,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 09:31:08,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 09:31:08,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 09:31:08,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 09:31:08,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 09:31:08,549 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 09:31:08,551 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 09:31:10,481 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 09:31:10,500 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 09:31:10,501 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 09:31:10,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:31:10 BoogieIcfgContainer [2022-11-20 09:31:10,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 09:31:10,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 09:31:10,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 09:31:10,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 09:31:10,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:31:06" (1/3) ... [2022-11-20 09:31:10,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3df049d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:31:10, skipping insertion in model container [2022-11-20 09:31:10,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:08" (2/3) ... [2022-11-20 09:31:10,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3df049d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:31:10, skipping insertion in model container [2022-11-20 09:31:10,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:31:10" (3/3) ... [2022-11-20 09:31:10,520 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label28.c [2022-11-20 09:31:10,539 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 09:31:10,539 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 09:31:10,597 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:31:10,603 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1a2e07e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:31:10,604 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 09:31:10,610 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:10,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-20 09:31:10,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:10,623 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:10,624 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:10,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:10,629 INFO L85 PathProgramCache]: Analyzing trace with hash 697342114, now seen corresponding path program 1 times [2022-11-20 09:31:10,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:10,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903347429] [2022-11-20 09:31:10,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:10,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:11,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:11,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:11,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903347429] [2022-11-20 09:31:11,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903347429] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:11,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:11,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:31:11,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552591923] [2022-11-20 09:31:11,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:11,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:31:11,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:11,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:31:11,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:31:11,738 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:13,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:13,014 INFO L93 Difference]: Finished difference Result 824 states and 1460 transitions. [2022-11-20 09:31:13,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:31:13,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-20 09:31:13,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:13,034 INFO L225 Difference]: With dead ends: 824 [2022-11-20 09:31:13,047 INFO L226 Difference]: Without dead ends: 445 [2022-11-20 09:31:13,051 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 [2022-11-20 09:31:13,055 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 78 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:13,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 247 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 09:31:13,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-11-20 09:31:13,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 444. [2022-11-20 09:31:13,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.417607223476298) internal successors, (628), 443 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:13,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 628 transitions. [2022-11-20 09:31:13,167 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 628 transitions. Word has length 152 [2022-11-20 09:31:13,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:13,168 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 628 transitions. [2022-11-20 09:31:13,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:13,169 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 628 transitions. [2022-11-20 09:31:13,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-20 09:31:13,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:13,173 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:13,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 09:31:13,176 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:13,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:13,177 INFO L85 PathProgramCache]: Analyzing trace with hash 233587009, now seen corresponding path program 1 times [2022-11-20 09:31:13,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:13,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526835111] [2022-11-20 09:31:13,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:13,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:13,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:13,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:13,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:13,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526835111] [2022-11-20 09:31:13,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526835111] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:13,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:13,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:31:13,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585026846] [2022-11-20 09:31:13,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:13,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:31:13,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:13,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:31:13,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:31:13,550 INFO L87 Difference]: Start difference. First operand 444 states and 628 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:14,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:14,539 INFO L93 Difference]: Finished difference Result 1313 states and 1864 transitions. [2022-11-20 09:31:14,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:31:14,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-20 09:31:14,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:14,551 INFO L225 Difference]: With dead ends: 1313 [2022-11-20 09:31:14,551 INFO L226 Difference]: Without dead ends: 871 [2022-11-20 09:31:14,553 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 [2022-11-20 09:31:14,555 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:14,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 90 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 09:31:14,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-11-20 09:31:14,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 857. [2022-11-20 09:31:14,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 1.3843457943925233) internal successors, (1185), 856 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:14,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1185 transitions. [2022-11-20 09:31:14,625 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1185 transitions. Word has length 160 [2022-11-20 09:31:14,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:14,636 INFO L495 AbstractCegarLoop]: Abstraction has 857 states and 1185 transitions. [2022-11-20 09:31:14,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:14,636 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1185 transitions. [2022-11-20 09:31:14,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-20 09:31:14,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:14,642 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:14,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 09:31:14,642 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:14,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:14,643 INFO L85 PathProgramCache]: Analyzing trace with hash 651701228, now seen corresponding path program 1 times [2022-11-20 09:31:14,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:14,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274268242] [2022-11-20 09:31:14,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:14,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:14,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:14,995 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:31:14,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:14,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274268242] [2022-11-20 09:31:14,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274268242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:14,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:14,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:31:14,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128490694] [2022-11-20 09:31:14,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:15,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:31:15,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:15,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:31:15,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:31:15,003 INFO L87 Difference]: Start difference. First operand 857 states and 1185 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:15,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:15,960 INFO L93 Difference]: Finished difference Result 2130 states and 3052 transitions. [2022-11-20 09:31:15,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:31:15,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2022-11-20 09:31:15,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:15,975 INFO L225 Difference]: With dead ends: 2130 [2022-11-20 09:31:15,975 INFO L226 Difference]: Without dead ends: 1275 [2022-11-20 09:31:15,983 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 [2022-11-20 09:31:15,986 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 126 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:15,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 346 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 09:31:15,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2022-11-20 09:31:16,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1273. [2022-11-20 09:31:16,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 1272 states have (on average 1.395440251572327) internal successors, (1775), 1272 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:16,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 1775 transitions. [2022-11-20 09:31:16,022 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 1775 transitions. Word has length 167 [2022-11-20 09:31:16,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:16,023 INFO L495 AbstractCegarLoop]: Abstraction has 1273 states and 1775 transitions. [2022-11-20 09:31:16,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:16,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 1775 transitions. [2022-11-20 09:31:16,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-20 09:31:16,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:16,029 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:16,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 09:31:16,030 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:16,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:16,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1455733754, now seen corresponding path program 1 times [2022-11-20 09:31:16,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:16,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160836190] [2022-11-20 09:31:16,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:16,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:16,361 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:31:16,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:16,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160836190] [2022-11-20 09:31:16,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160836190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:16,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:16,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:31:16,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040843065] [2022-11-20 09:31:16,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:16,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:31:16,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:16,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:31:16,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:31:16,364 INFO L87 Difference]: Start difference. First operand 1273 states and 1775 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:17,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:17,322 INFO L93 Difference]: Finished difference Result 3774 states and 5271 transitions. [2022-11-20 09:31:17,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:31:17,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2022-11-20 09:31:17,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:17,331 INFO L225 Difference]: With dead ends: 3774 [2022-11-20 09:31:17,332 INFO L226 Difference]: Without dead ends: 2503 [2022-11-20 09:31:17,334 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 [2022-11-20 09:31:17,335 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 216 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:17,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 365 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 09:31:17,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2022-11-20 09:31:17,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 2499. [2022-11-20 09:31:17,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2499 states, 2498 states have (on average 1.3062449959967974) internal successors, (3263), 2498 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:17,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2499 states to 2499 states and 3263 transitions. [2022-11-20 09:31:17,390 INFO L78 Accepts]: Start accepts. Automaton has 2499 states and 3263 transitions. Word has length 173 [2022-11-20 09:31:17,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:17,391 INFO L495 AbstractCegarLoop]: Abstraction has 2499 states and 3263 transitions. [2022-11-20 09:31:17,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:17,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2499 states and 3263 transitions. [2022-11-20 09:31:17,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-11-20 09:31:17,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:17,396 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:17,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 09:31:17,397 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:17,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:17,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1109508564, now seen corresponding path program 1 times [2022-11-20 09:31:17,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:17,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44353993] [2022-11-20 09:31:17,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:17,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:17,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:31:17,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:17,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44353993] [2022-11-20 09:31:17,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44353993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:17,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:17,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:31:17,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667971463] [2022-11-20 09:31:17,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:17,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:31:17,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:17,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:31:17,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:31:17,766 INFO L87 Difference]: Start difference. First operand 2499 states and 3263 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:18,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:18,716 INFO L93 Difference]: Finished difference Result 5818 states and 7631 transitions. [2022-11-20 09:31:18,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:31:18,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2022-11-20 09:31:18,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:18,727 INFO L225 Difference]: With dead ends: 5818 [2022-11-20 09:31:18,727 INFO L226 Difference]: Without dead ends: 3321 [2022-11-20 09:31:18,730 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 [2022-11-20 09:31:18,731 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 214 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:18,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 364 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 09:31:18,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2022-11-20 09:31:18,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 3312. [2022-11-20 09:31:18,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3312 states, 3311 states have (on average 1.266384778012685) internal successors, (4193), 3311 states have internal predecessors, (4193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:18,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3312 states to 3312 states and 4193 transitions. [2022-11-20 09:31:18,798 INFO L78 Accepts]: Start accepts. Automaton has 3312 states and 4193 transitions. Word has length 180 [2022-11-20 09:31:18,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:18,798 INFO L495 AbstractCegarLoop]: Abstraction has 3312 states and 4193 transitions. [2022-11-20 09:31:18,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:18,799 INFO L276 IsEmpty]: Start isEmpty. Operand 3312 states and 4193 transitions. [2022-11-20 09:31:18,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-11-20 09:31:18,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:18,806 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:18,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 09:31:18,807 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:18,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:18,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1324416253, now seen corresponding path program 1 times [2022-11-20 09:31:18,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:18,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603352836] [2022-11-20 09:31:18,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:18,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:19,342 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 09:31:19,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:19,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603352836] [2022-11-20 09:31:19,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603352836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:19,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:19,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:31:19,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013867463] [2022-11-20 09:31:19,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:19,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:31:19,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:19,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:31:19,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:31:19,345 INFO L87 Difference]: Start difference. First operand 3312 states and 4193 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:20,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:20,375 INFO L93 Difference]: Finished difference Result 8881 states and 11393 transitions. [2022-11-20 09:31:20,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:31:20,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2022-11-20 09:31:20,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:20,393 INFO L225 Difference]: With dead ends: 8881 [2022-11-20 09:31:20,394 INFO L226 Difference]: Without dead ends: 5571 [2022-11-20 09:31:20,398 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 [2022-11-20 09:31:20,400 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 211 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:20,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 238 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 09:31:20,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5571 states. [2022-11-20 09:31:20,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5571 to 5551. [2022-11-20 09:31:20,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5551 states, 5550 states have (on average 1.2855855855855856) internal successors, (7135), 5550 states have internal predecessors, (7135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:20,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5551 states to 5551 states and 7135 transitions. [2022-11-20 09:31:20,520 INFO L78 Accepts]: Start accepts. Automaton has 5551 states and 7135 transitions. Word has length 195 [2022-11-20 09:31:20,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:20,520 INFO L495 AbstractCegarLoop]: Abstraction has 5551 states and 7135 transitions. [2022-11-20 09:31:20,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:20,521 INFO L276 IsEmpty]: Start isEmpty. Operand 5551 states and 7135 transitions. [2022-11-20 09:31:20,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-11-20 09:31:20,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:20,529 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:20,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 09:31:20,530 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:20,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:20,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1341529967, now seen corresponding path program 1 times [2022-11-20 09:31:20,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:20,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440244147] [2022-11-20 09:31:20,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:20,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:20,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:20,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:20,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440244147] [2022-11-20 09:31:20,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440244147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:20,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:20,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:31:20,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746850532] [2022-11-20 09:31:20,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:20,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:31:20,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:20,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:31:20,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:31:20,944 INFO L87 Difference]: Start difference. First operand 5551 states and 7135 transitions. Second operand has 4 states, 4 states have (on average 49.0) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:22,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:22,490 INFO L93 Difference]: Finished difference Result 10714 states and 13855 transitions. [2022-11-20 09:31:22,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:31:22,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2022-11-20 09:31:22,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:22,507 INFO L225 Difference]: With dead ends: 10714 [2022-11-20 09:31:22,508 INFO L226 Difference]: Without dead ends: 5571 [2022-11-20 09:31:22,513 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 [2022-11-20 09:31:22,516 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 450 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:22,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 122 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-20 09:31:22,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5571 states. [2022-11-20 09:31:22,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5571 to 5348. [2022-11-20 09:31:22,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5348 states, 5347 states have (on average 1.2870768655320741) internal successors, (6882), 5347 states have internal predecessors, (6882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:22,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5348 states to 5348 states and 6882 transitions. [2022-11-20 09:31:22,628 INFO L78 Accepts]: Start accepts. Automaton has 5348 states and 6882 transitions. Word has length 196 [2022-11-20 09:31:22,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:22,628 INFO L495 AbstractCegarLoop]: Abstraction has 5348 states and 6882 transitions. [2022-11-20 09:31:22,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:22,629 INFO L276 IsEmpty]: Start isEmpty. Operand 5348 states and 6882 transitions. [2022-11-20 09:31:22,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-20 09:31:22,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:22,637 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:22,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 09:31:22,637 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:22,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:22,638 INFO L85 PathProgramCache]: Analyzing trace with hash 221221588, now seen corresponding path program 1 times [2022-11-20 09:31:22,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:22,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991106914] [2022-11-20 09:31:22,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:22,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 09:31:23,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:23,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991106914] [2022-11-20 09:31:23,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991106914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:23,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:23,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:31:23,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149585039] [2022-11-20 09:31:23,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:23,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:31:23,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:23,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:31:23,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:31:23,087 INFO L87 Difference]: Start difference. First operand 5348 states and 6882 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:24,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:24,099 INFO L93 Difference]: Finished difference Result 14176 states and 18488 transitions. [2022-11-20 09:31:24,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:31:24,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2022-11-20 09:31:24,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:24,127 INFO L225 Difference]: With dead ends: 14176 [2022-11-20 09:31:24,127 INFO L226 Difference]: Without dead ends: 9236 [2022-11-20 09:31:24,134 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 [2022-11-20 09:31:24,134 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 219 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:24,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 168 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 09:31:24,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9236 states. [2022-11-20 09:31:24,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9236 to 9226. [2022-11-20 09:31:24,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9226 states, 9225 states have (on average 1.272411924119241) internal successors, (11738), 9225 states have internal predecessors, (11738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:24,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9226 states to 9226 states and 11738 transitions. [2022-11-20 09:31:24,391 INFO L78 Accepts]: Start accepts. Automaton has 9226 states and 11738 transitions. Word has length 199 [2022-11-20 09:31:24,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:24,391 INFO L495 AbstractCegarLoop]: Abstraction has 9226 states and 11738 transitions. [2022-11-20 09:31:24,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:24,392 INFO L276 IsEmpty]: Start isEmpty. Operand 9226 states and 11738 transitions. [2022-11-20 09:31:24,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-11-20 09:31:24,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:24,405 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:24,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 09:31:24,407 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:24,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:24,407 INFO L85 PathProgramCache]: Analyzing trace with hash 399462554, now seen corresponding path program 1 times [2022-11-20 09:31:24,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:24,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622331160] [2022-11-20 09:31:24,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:24,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:24,850 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 09:31:24,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:24,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622331160] [2022-11-20 09:31:24,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622331160] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:24,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432232768] [2022-11-20 09:31:24,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:24,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:24,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:24,855 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:24,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 09:31:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:25,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 09:31:25,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:25,381 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 09:31:25,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:31:25,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432232768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:25,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:31:25,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-20 09:31:25,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400416352] [2022-11-20 09:31:25,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:25,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:31:25,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:25,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:31:25,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:31:25,384 INFO L87 Difference]: Start difference. First operand 9226 states and 11738 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:26,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:26,364 INFO L93 Difference]: Finished difference Result 18272 states and 23302 transitions. [2022-11-20 09:31:26,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:31:26,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2022-11-20 09:31:26,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:26,400 INFO L225 Difference]: With dead ends: 18272 [2022-11-20 09:31:26,400 INFO L226 Difference]: Without dead ends: 9048 [2022-11-20 09:31:26,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:31:26,410 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 86 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:26,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 350 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 09:31:26,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9048 states. [2022-11-20 09:31:26,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9048 to 9023. [2022-11-20 09:31:26,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9023 states, 9022 states have (on average 1.2631345599645312) internal successors, (11396), 9022 states have internal predecessors, (11396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:26,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9023 states to 9023 states and 11396 transitions. [2022-11-20 09:31:26,545 INFO L78 Accepts]: Start accepts. Automaton has 9023 states and 11396 transitions. Word has length 203 [2022-11-20 09:31:26,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:26,546 INFO L495 AbstractCegarLoop]: Abstraction has 9023 states and 11396 transitions. [2022-11-20 09:31:26,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:26,546 INFO L276 IsEmpty]: Start isEmpty. Operand 9023 states and 11396 transitions. [2022-11-20 09:31:26,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-11-20 09:31:26,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:26,559 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:26,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:26,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:26,766 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:26,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:26,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1333067857, now seen corresponding path program 1 times [2022-11-20 09:31:26,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:26,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772889515] [2022-11-20 09:31:26,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:26,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:26,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:27,246 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 93 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 09:31:27,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:27,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772889515] [2022-11-20 09:31:27,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772889515] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:27,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153631929] [2022-11-20 09:31:27,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:27,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:27,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:27,249 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:27,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 09:31:27,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:27,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 09:31:27,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 93 proven. 26 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 09:31:27,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 93 proven. 26 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 09:31:28,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153631929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:28,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:28,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 6 [2022-11-20 09:31:28,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244560227] [2022-11-20 09:31:28,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:28,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 09:31:28,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:28,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 09:31:28,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 09:31:28,125 INFO L87 Difference]: Start difference. First operand 9023 states and 11396 transitions. Second operand has 6 states, 6 states have (on average 65.0) internal successors, (390), 6 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:33,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:33,169 INFO L93 Difference]: Finished difference Result 50965 states and 65536 transitions. [2022-11-20 09:31:33,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 09:31:33,170 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 65.0) internal successors, (390), 6 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 237 [2022-11-20 09:31:33,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:33,242 INFO L225 Difference]: With dead ends: 50965 [2022-11-20 09:31:33,243 INFO L226 Difference]: Without dead ends: 42350 [2022-11-20 09:31:33,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:31:33,257 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 2820 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 3887 mSolverCounterSat, 941 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2820 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 4828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 941 IncrementalHoareTripleChecker+Valid, 3887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:33,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2820 Valid, 339 Invalid, 4828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [941 Valid, 3887 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-20 09:31:33,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42350 states. [2022-11-20 09:31:33,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42350 to 42295. [2022-11-20 09:31:33,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42295 states, 42294 states have (on average 1.2161772355416844) internal successors, (51437), 42294 states have internal predecessors, (51437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:33,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42295 states to 42295 states and 51437 transitions. [2022-11-20 09:31:33,943 INFO L78 Accepts]: Start accepts. Automaton has 42295 states and 51437 transitions. Word has length 237 [2022-11-20 09:31:33,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:33,943 INFO L495 AbstractCegarLoop]: Abstraction has 42295 states and 51437 transitions. [2022-11-20 09:31:33,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 65.0) internal successors, (390), 6 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:33,944 INFO L276 IsEmpty]: Start isEmpty. Operand 42295 states and 51437 transitions. [2022-11-20 09:31:33,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-11-20 09:31:33,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:33,977 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:33,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:34,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 09:31:34,183 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:34,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:34,184 INFO L85 PathProgramCache]: Analyzing trace with hash -879094002, now seen corresponding path program 1 times [2022-11-20 09:31:34,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:34,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320540202] [2022-11-20 09:31:34,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:34,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:34,647 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-20 09:31:34,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:34,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320540202] [2022-11-20 09:31:34,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320540202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:34,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:34,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:31:34,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122363991] [2022-11-20 09:31:34,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:34,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:31:34,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:34,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:31:34,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:31:34,650 INFO L87 Difference]: Start difference. First operand 42295 states and 51437 transitions. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:35,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:35,831 INFO L93 Difference]: Finished difference Result 79779 states and 97309 transitions. [2022-11-20 09:31:35,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:31:35,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 254 [2022-11-20 09:31:35,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:35,883 INFO L225 Difference]: With dead ends: 79779 [2022-11-20 09:31:35,883 INFO L226 Difference]: Without dead ends: 38095 [2022-11-20 09:31:35,908 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 [2022-11-20 09:31:35,909 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 464 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:35,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 55 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 09:31:35,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38095 states. [2022-11-20 09:31:36,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38095 to 36877. [2022-11-20 09:31:36,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36877 states, 36876 states have (on average 1.1884423473261743) internal successors, (43825), 36876 states have internal predecessors, (43825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:36,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36877 states to 36877 states and 43825 transitions. [2022-11-20 09:31:36,575 INFO L78 Accepts]: Start accepts. Automaton has 36877 states and 43825 transitions. Word has length 254 [2022-11-20 09:31:36,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:36,576 INFO L495 AbstractCegarLoop]: Abstraction has 36877 states and 43825 transitions. [2022-11-20 09:31:36,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:36,576 INFO L276 IsEmpty]: Start isEmpty. Operand 36877 states and 43825 transitions. [2022-11-20 09:31:36,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-11-20 09:31:36,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:36,603 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:36,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 09:31:36,604 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:36,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:36,605 INFO L85 PathProgramCache]: Analyzing trace with hash 222566490, now seen corresponding path program 1 times [2022-11-20 09:31:36,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:36,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417347759] [2022-11-20 09:31:36,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:36,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:36,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:37,448 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-20 09:31:37,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:37,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417347759] [2022-11-20 09:31:37,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417347759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:37,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:37,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:31:37,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123271200] [2022-11-20 09:31:37,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:37,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:31:37,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:37,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:31:37,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:31:37,451 INFO L87 Difference]: Start difference. First operand 36877 states and 43825 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:38,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:38,503 INFO L93 Difference]: Finished difference Result 89218 states and 106693 transitions. [2022-11-20 09:31:38,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:31:38,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 254 [2022-11-20 09:31:38,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:38,572 INFO L225 Difference]: With dead ends: 89218 [2022-11-20 09:31:38,572 INFO L226 Difference]: Without dead ends: 52952 [2022-11-20 09:31:38,595 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 [2022-11-20 09:31:38,596 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 224 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:38,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 119 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 09:31:38,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52952 states. [2022-11-20 09:31:39,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52952 to 52946. [2022-11-20 09:31:39,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52946 states, 52945 states have (on average 1.1929171782037964) internal successors, (63159), 52945 states have internal predecessors, (63159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:39,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52946 states to 52946 states and 63159 transitions. [2022-11-20 09:31:39,696 INFO L78 Accepts]: Start accepts. Automaton has 52946 states and 63159 transitions. Word has length 254 [2022-11-20 09:31:39,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:39,696 INFO L495 AbstractCegarLoop]: Abstraction has 52946 states and 63159 transitions. [2022-11-20 09:31:39,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:39,697 INFO L276 IsEmpty]: Start isEmpty. Operand 52946 states and 63159 transitions. [2022-11-20 09:31:39,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-20 09:31:39,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:39,727 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:39,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 09:31:39,727 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:39,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:39,728 INFO L85 PathProgramCache]: Analyzing trace with hash -52091255, now seen corresponding path program 1 times [2022-11-20 09:31:39,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:39,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532832079] [2022-11-20 09:31:39,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:39,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:40,240 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-20 09:31:40,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:40,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532832079] [2022-11-20 09:31:40,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532832079] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:40,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:40,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:31:40,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399593736] [2022-11-20 09:31:40,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:40,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:31:40,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:40,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:31:40,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:31:40,244 INFO L87 Difference]: Start difference. First operand 52946 states and 63159 transitions. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 2 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:41,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:41,515 INFO L93 Difference]: Finished difference Result 119085 states and 143041 transitions. [2022-11-20 09:31:41,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:31:41,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 2 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-20 09:31:41,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:41,592 INFO L225 Difference]: With dead ends: 119085 [2022-11-20 09:31:41,592 INFO L226 Difference]: Without dead ends: 67765 [2022-11-20 09:31:41,734 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 [2022-11-20 09:31:41,748 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 140 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:41,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 152 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 09:31:41,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67765 states. [2022-11-20 09:31:42,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67765 to 67765. [2022-11-20 09:31:42,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67765 states, 67764 states have (on average 1.1491942624402338) internal successors, (77874), 67764 states have internal predecessors, (77874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:42,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67765 states to 67765 states and 77874 transitions. [2022-11-20 09:31:42,707 INFO L78 Accepts]: Start accepts. Automaton has 67765 states and 77874 transitions. Word has length 266 [2022-11-20 09:31:42,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:42,707 INFO L495 AbstractCegarLoop]: Abstraction has 67765 states and 77874 transitions. [2022-11-20 09:31:42,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 2 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:42,708 INFO L276 IsEmpty]: Start isEmpty. Operand 67765 states and 77874 transitions. [2022-11-20 09:31:42,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-11-20 09:31:42,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:42,732 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:42,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 09:31:42,732 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:42,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:42,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1098622564, now seen corresponding path program 1 times [2022-11-20 09:31:42,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:42,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013757901] [2022-11-20 09:31:42,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:42,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-20 09:31:43,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:43,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013757901] [2022-11-20 09:31:43,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013757901] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:43,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:43,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:31:43,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130825620] [2022-11-20 09:31:43,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:43,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:31:43,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:43,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:31:43,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:31:43,405 INFO L87 Difference]: Start difference. First operand 67765 states and 77874 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:44,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:44,484 INFO L93 Difference]: Finished difference Result 116617 states and 133672 transitions. [2022-11-20 09:31:44,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:31:44,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 268 [2022-11-20 09:31:44,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:44,541 INFO L225 Difference]: With dead ends: 116617 [2022-11-20 09:31:44,541 INFO L226 Difference]: Without dead ends: 69795 [2022-11-20 09:31:44,570 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 [2022-11-20 09:31:44,570 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 161 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:44,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 359 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 09:31:44,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69795 states. [2022-11-20 09:31:45,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69795 to 69795. [2022-11-20 09:31:45,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69795 states, 69794 states have (on average 1.1438232512823452) internal successors, (79832), 69794 states have internal predecessors, (79832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:45,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69795 states to 69795 states and 79832 transitions. [2022-11-20 09:31:45,633 INFO L78 Accepts]: Start accepts. Automaton has 69795 states and 79832 transitions. Word has length 268 [2022-11-20 09:31:45,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:45,633 INFO L495 AbstractCegarLoop]: Abstraction has 69795 states and 79832 transitions. [2022-11-20 09:31:45,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:45,634 INFO L276 IsEmpty]: Start isEmpty. Operand 69795 states and 79832 transitions. [2022-11-20 09:31:45,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-11-20 09:31:45,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:45,844 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:45,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 09:31:45,844 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:45,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:45,845 INFO L85 PathProgramCache]: Analyzing trace with hash -170040178, now seen corresponding path program 1 times [2022-11-20 09:31:45,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:45,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548838841] [2022-11-20 09:31:45,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:45,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:45,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 09:31:46,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:46,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548838841] [2022-11-20 09:31:46,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548838841] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:46,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:46,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:31:46,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791635765] [2022-11-20 09:31:46,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:46,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:31:46,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:46,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:31:46,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:31:46,334 INFO L87 Difference]: Start difference. First operand 69795 states and 79832 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 2 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:47,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:47,598 INFO L93 Difference]: Finished difference Result 131685 states and 150641 transitions. [2022-11-20 09:31:47,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:31:47,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 2 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 273 [2022-11-20 09:31:47,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:47,665 INFO L225 Difference]: With dead ends: 131685 [2022-11-20 09:31:47,665 INFO L226 Difference]: Without dead ends: 83239 [2022-11-20 09:31:47,690 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 [2022-11-20 09:31:47,691 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 160 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:47,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 170 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 09:31:47,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83239 states. [2022-11-20 09:31:48,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83239 to 76709. [2022-11-20 09:31:48,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76709 states, 76708 states have (on average 1.151314074151327) internal successors, (88315), 76708 states have internal predecessors, (88315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:48,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76709 states to 76709 states and 88315 transitions. [2022-11-20 09:31:48,867 INFO L78 Accepts]: Start accepts. Automaton has 76709 states and 88315 transitions. Word has length 273 [2022-11-20 09:31:48,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:48,867 INFO L495 AbstractCegarLoop]: Abstraction has 76709 states and 88315 transitions. [2022-11-20 09:31:48,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 2 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:48,867 INFO L276 IsEmpty]: Start isEmpty. Operand 76709 states and 88315 transitions. [2022-11-20 09:31:48,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-11-20 09:31:48,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:48,895 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:48,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 09:31:48,895 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:48,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:48,896 INFO L85 PathProgramCache]: Analyzing trace with hash -752188596, now seen corresponding path program 1 times [2022-11-20 09:31:48,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:48,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672221453] [2022-11-20 09:31:48,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:48,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:49,923 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-20 09:31:49,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:49,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672221453] [2022-11-20 09:31:49,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672221453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:49,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:49,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:31:49,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035483126] [2022-11-20 09:31:49,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:49,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:31:49,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:49,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:31:49,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:31:49,926 INFO L87 Difference]: Start difference. First operand 76709 states and 88315 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 2 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:51,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:51,069 INFO L93 Difference]: Finished difference Result 151387 states and 174442 transitions. [2022-11-20 09:31:51,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:31:51,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 2 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 280 [2022-11-20 09:31:51,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:51,129 INFO L225 Difference]: With dead ends: 151387 [2022-11-20 09:31:51,130 INFO L226 Difference]: Without dead ends: 76710 [2022-11-20 09:31:51,155 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 [2022-11-20 09:31:51,156 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 133 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:51,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 151 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 09:31:51,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76710 states. [2022-11-20 09:31:51,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76710 to 76709. [2022-11-20 09:31:52,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76709 states, 76708 states have (on average 1.1512749648015852) internal successors, (88312), 76708 states have internal predecessors, (88312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:52,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76709 states to 76709 states and 88312 transitions. [2022-11-20 09:31:52,459 INFO L78 Accepts]: Start accepts. Automaton has 76709 states and 88312 transitions. Word has length 280 [2022-11-20 09:31:52,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:52,459 INFO L495 AbstractCegarLoop]: Abstraction has 76709 states and 88312 transitions. [2022-11-20 09:31:52,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 2 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:52,460 INFO L276 IsEmpty]: Start isEmpty. Operand 76709 states and 88312 transitions. [2022-11-20 09:31:52,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-11-20 09:31:52,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:52,484 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:52,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 09:31:52,484 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:52,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:52,485 INFO L85 PathProgramCache]: Analyzing trace with hash -428999522, now seen corresponding path program 1 times [2022-11-20 09:31:52,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:52,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998105687] [2022-11-20 09:31:52,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:52,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-20 09:31:52,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:52,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998105687] [2022-11-20 09:31:52,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998105687] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:52,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:52,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:31:52,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608921836] [2022-11-20 09:31:52,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:52,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:31:52,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:52,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:31:52,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:31:52,958 INFO L87 Difference]: Start difference. First operand 76709 states and 88312 transitions. Second operand has 4 states, 4 states have (on average 64.0) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:54,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:54,848 INFO L93 Difference]: Finished difference Result 159579 states and 184201 transitions. [2022-11-20 09:31:54,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:31:54,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 64.0) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 294 [2022-11-20 09:31:54,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:54,920 INFO L225 Difference]: With dead ends: 159579 [2022-11-20 09:31:54,920 INFO L226 Difference]: Without dead ends: 84902 [2022-11-20 09:31:54,945 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 [2022-11-20 09:31:54,946 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 373 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:54,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 86 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 09:31:55,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84902 states. [2022-11-20 09:31:55,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84902 to 81400. [2022-11-20 09:31:55,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81400 states, 81399 states have (on average 1.1520043243774494) internal successors, (93772), 81399 states have internal predecessors, (93772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:55,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81400 states to 81400 states and 93772 transitions. [2022-11-20 09:31:55,918 INFO L78 Accepts]: Start accepts. Automaton has 81400 states and 93772 transitions. Word has length 294 [2022-11-20 09:31:55,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:55,919 INFO L495 AbstractCegarLoop]: Abstraction has 81400 states and 93772 transitions. [2022-11-20 09:31:55,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.0) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:55,919 INFO L276 IsEmpty]: Start isEmpty. Operand 81400 states and 93772 transitions. [2022-11-20 09:31:55,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-11-20 09:31:55,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:55,938 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:55,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 09:31:55,939 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:55,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:55,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1433879905, now seen corresponding path program 1 times [2022-11-20 09:31:55,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:55,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836618968] [2022-11-20 09:31:55,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:55,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-11-20 09:31:56,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:56,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836618968] [2022-11-20 09:31:56,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836618968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:56,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:56,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:31:56,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604868438] [2022-11-20 09:31:56,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:56,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:31:56,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:56,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:31:56,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:31:56,679 INFO L87 Difference]: Start difference. First operand 81400 states and 93772 transitions. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:58,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:58,277 INFO L93 Difference]: Finished difference Result 181528 states and 209177 transitions. [2022-11-20 09:31:58,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:31:58,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 304 [2022-11-20 09:31:58,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:58,377 INFO L225 Difference]: With dead ends: 181528 [2022-11-20 09:31:58,377 INFO L226 Difference]: Without dead ends: 102160 [2022-11-20 09:31:58,397 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 [2022-11-20 09:31:58,398 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 208 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:58,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 179 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 09:31:58,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102160 states. [2022-11-20 09:31:59,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102160 to 102150. [2022-11-20 09:31:59,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102150 states, 102149 states have (on average 1.1487826606232072) internal successors, (117347), 102149 states have internal predecessors, (117347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:59,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102150 states to 102150 states and 117347 transitions. [2022-11-20 09:31:59,831 INFO L78 Accepts]: Start accepts. Automaton has 102150 states and 117347 transitions. Word has length 304 [2022-11-20 09:31:59,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:59,831 INFO L495 AbstractCegarLoop]: Abstraction has 102150 states and 117347 transitions. [2022-11-20 09:31:59,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:59,831 INFO L276 IsEmpty]: Start isEmpty. Operand 102150 states and 117347 transitions. [2022-11-20 09:31:59,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2022-11-20 09:31:59,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:59,853 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:59,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 09:31:59,854 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:59,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:59,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1079103819, now seen corresponding path program 1 times [2022-11-20 09:31:59,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:59,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084927723] [2022-11-20 09:31:59,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:59,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:00,865 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 09:32:00,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:00,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084927723] [2022-11-20 09:32:00,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084927723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:32:00,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:32:00,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:32:00,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135004008] [2022-11-20 09:32:00,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:32:00,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:32:00,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:00,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:32:00,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:32:00,868 INFO L87 Difference]: Start difference. First operand 102150 states and 117347 transitions. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 2 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:01,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:01,923 INFO L93 Difference]: Finished difference Result 179901 states and 206547 transitions. [2022-11-20 09:32:01,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:32:01,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 2 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 337 [2022-11-20 09:32:01,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:02,022 INFO L225 Difference]: With dead ends: 179901 [2022-11-20 09:32:02,022 INFO L226 Difference]: Without dead ends: 102151 [2022-11-20 09:32:02,056 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 [2022-11-20 09:32:02,057 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 70 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:02,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 150 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 09:32:02,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102151 states. [2022-11-20 09:32:03,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102151 to 102150. [2022-11-20 09:32:03,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102150 states, 102149 states have (on average 1.1487043436548572) internal successors, (117339), 102149 states have internal predecessors, (117339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:03,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102150 states to 102150 states and 117339 transitions. [2022-11-20 09:32:03,809 INFO L78 Accepts]: Start accepts. Automaton has 102150 states and 117339 transitions. Word has length 337 [2022-11-20 09:32:03,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:03,810 INFO L495 AbstractCegarLoop]: Abstraction has 102150 states and 117339 transitions. [2022-11-20 09:32:03,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 2 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:03,811 INFO L276 IsEmpty]: Start isEmpty. Operand 102150 states and 117339 transitions. [2022-11-20 09:32:03,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-11-20 09:32:03,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:03,856 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:03,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-20 09:32:03,856 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:32:03,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:03,857 INFO L85 PathProgramCache]: Analyzing trace with hash 251001855, now seen corresponding path program 1 times [2022-11-20 09:32:03,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:03,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414105481] [2022-11-20 09:32:03,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:03,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:03,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:04,850 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 213 proven. 9 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-20 09:32:04,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:04,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414105481] [2022-11-20 09:32:04,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414105481] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:04,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722996405] [2022-11-20 09:32:04,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:04,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:04,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:04,863 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:04,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 09:32:05,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:05,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 09:32:05,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:05,383 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-20 09:32:05,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:32:05,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722996405] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:32:05,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:32:05,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-20 09:32:05,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26370509] [2022-11-20 09:32:05,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:32:05,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:32:05,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:05,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:32:05,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 09:32:05,386 INFO L87 Difference]: Start difference. First operand 102150 states and 117339 transitions. Second operand has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:06,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:06,631 INFO L93 Difference]: Finished difference Result 199204 states and 229907 transitions. [2022-11-20 09:32:06,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:32:06,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 345 [2022-11-20 09:32:06,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:06,750 INFO L225 Difference]: With dead ends: 199204 [2022-11-20 09:32:06,750 INFO L226 Difference]: Without dead ends: 121454 [2022-11-20 09:32:06,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 09:32:06,788 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 98 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:06,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 292 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 09:32:06,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121454 states. [2022-11-20 09:32:08,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121454 to 117375. [2022-11-20 09:32:08,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117375 states, 117374 states have (on average 1.155801114386491) internal successors, (135661), 117374 states have internal predecessors, (135661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:08,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117375 states to 117375 states and 135661 transitions. [2022-11-20 09:32:08,785 INFO L78 Accepts]: Start accepts. Automaton has 117375 states and 135661 transitions. Word has length 345 [2022-11-20 09:32:08,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:08,785 INFO L495 AbstractCegarLoop]: Abstraction has 117375 states and 135661 transitions. [2022-11-20 09:32:08,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:08,785 INFO L276 IsEmpty]: Start isEmpty. Operand 117375 states and 135661 transitions. [2022-11-20 09:32:08,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-11-20 09:32:08,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:08,812 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:08,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:09,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-11-20 09:32:09,015 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:32:09,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:09,015 INFO L85 PathProgramCache]: Analyzing trace with hash 451988262, now seen corresponding path program 1 times [2022-11-20 09:32:09,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:09,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146637314] [2022-11-20 09:32:09,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:09,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 233 proven. 9 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-20 09:32:10,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:10,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146637314] [2022-11-20 09:32:10,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146637314] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:10,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716322886] [2022-11-20 09:32:10,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:10,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:10,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:10,012 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:10,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 09:32:10,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:10,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 09:32:10,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:10,442 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 289 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 09:32:10,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:32:10,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716322886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:32:10,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:32:10,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-20 09:32:10,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264526866] [2022-11-20 09:32:10,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:32:10,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:32:10,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:10,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:32:10,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 09:32:10,445 INFO L87 Difference]: Start difference. First operand 117375 states and 135661 transitions. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:12,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:12,488 INFO L93 Difference]: Finished difference Result 257980 states and 298859 transitions. [2022-11-20 09:32:12,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:32:12,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 365 [2022-11-20 09:32:12,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:12,632 INFO L225 Difference]: With dead ends: 257980 [2022-11-20 09:32:12,632 INFO L226 Difference]: Without dead ends: 143449 [2022-11-20 09:32:12,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 09:32:12,670 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 202 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:12,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 101 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 09:32:12,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143449 states. [2022-11-20 09:32:14,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143449 to 129792. [2022-11-20 09:32:14,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129792 states, 129791 states have (on average 1.1417894923376815) internal successors, (148194), 129791 states have internal predecessors, (148194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:14,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129792 states to 129792 states and 148194 transitions. [2022-11-20 09:32:14,499 INFO L78 Accepts]: Start accepts. Automaton has 129792 states and 148194 transitions. Word has length 365 [2022-11-20 09:32:14,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:14,499 INFO L495 AbstractCegarLoop]: Abstraction has 129792 states and 148194 transitions. [2022-11-20 09:32:14,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:14,499 INFO L276 IsEmpty]: Start isEmpty. Operand 129792 states and 148194 transitions. [2022-11-20 09:32:15,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2022-11-20 09:32:15,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:15,016 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:15,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-20 09:32:15,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f66db8-0a65-4713-b94e-c8ae4c014428/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:15,222 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:32:15,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:15,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1260477996, now seen corresponding path program 1 times [2022-11-20 09:32:15,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:15,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370051050] [2022-11-20 09:32:15,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:15,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:15,530 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-20 09:32:15,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:15,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370051050] [2022-11-20 09:32:15,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370051050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:32:15,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:32:15,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:32:15,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134864707] [2022-11-20 09:32:15,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:32:15,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:32:15,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:15,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:32:15,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:32:15,533 INFO L87 Difference]: Start difference. First operand 129792 states and 148194 transitions. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:17,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:17,266 INFO L93 Difference]: Finished difference Result 228067 states and 260839 transitions. [2022-11-20 09:32:17,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:32:17,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 382 [2022-11-20 09:32:17,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:17,381 INFO L225 Difference]: With dead ends: 228067 [2022-11-20 09:32:17,381 INFO L226 Difference]: Without dead ends: 98277 [2022-11-20 09:32:17,432 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 [2022-11-20 09:32:17,432 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 88 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:17,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 379 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 09:32:17,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98277 states.