./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.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_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/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_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/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_cdba2027-c395-4b6a-a602-fabfcff317cf/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 e3fe12f9ba7a27693660ab3b9c436489448c0880075d8a5a83d98427fc7a74d3 --- 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 12:26:20,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:26:20,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:26:20,139 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:26:20,140 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:26:20,143 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:26:20,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:26:20,149 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:26:20,151 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:26:20,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:26:20,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:26:20,158 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:26:20,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:26:20,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:26:20,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:26:20,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:26:20,163 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:26:20,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:26:20,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:26:20,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:26:20,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:26:20,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:26:20,181 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:26:20,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:26:20,192 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:26:20,192 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:26:20,193 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:26:20,194 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:26:20,195 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:26:20,196 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:26:20,196 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:26:20,197 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:26:20,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:26:20,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:26:20,201 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:26:20,201 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:26:20,203 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:26:20,204 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:26:20,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:26:20,206 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:26:20,206 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:26:20,207 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 12:26:20,246 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:26:20,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:26:20,247 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:26:20,247 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:26:20,248 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:26:20,249 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:26:20,249 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:26:20,250 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:26:20,250 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:26:20,250 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:26:20,251 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:26:20,252 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:26:20,252 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:26:20,252 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:26:20,252 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 12:26:20,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:26:20,253 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 12:26:20,253 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:26:20,253 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 12:26:20,254 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:26:20,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 12:26:20,254 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:26:20,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:26:20,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:26:20,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:26:20,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:26:20,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:26:20,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 12:26:20,256 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:26:20,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:26:20,257 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 12:26:20,257 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 12:26:20,258 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 12:26:20,258 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_cdba2027-c395-4b6a-a602-fabfcff317cf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3fe12f9ba7a27693660ab3b9c436489448c0880075d8a5a83d98427fc7a74d3 [2022-11-20 12:26:20,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:26:20,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:26:20,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:26:20,602 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:26:20,603 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:26:20,604 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c [2022-11-20 12:26:23,651 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:26:23,893 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:26:23,893 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c [2022-11-20 12:26:23,902 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/data/b34bd5c87/f98948d2262e4620a9daf7dcae9d3d72/FLAGd49e1b11a [2022-11-20 12:26:23,917 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/data/b34bd5c87/f98948d2262e4620a9daf7dcae9d3d72 [2022-11-20 12:26:23,919 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:26:23,921 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:26:23,923 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:26:23,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:26:23,927 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:26:23,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:26:23" (1/1) ... [2022-11-20 12:26:23,929 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2665df67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:26:23, skipping insertion in model container [2022-11-20 12:26:23,929 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:26:23" (1/1) ... [2022-11-20 12:26:23,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:26:23,963 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:26:24,199 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_cdba2027-c395-4b6a-a602-fabfcff317cf/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c[6899,6912] [2022-11-20 12:26:24,203 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:26:24,221 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:26:24,283 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_cdba2027-c395-4b6a-a602-fabfcff317cf/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c[6899,6912] [2022-11-20 12:26:24,283 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:26:24,307 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:26:24,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:26:24 WrapperNode [2022-11-20 12:26:24,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:26:24,309 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:26:24,309 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:26:24,309 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:26:24,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:26:24" (1/1) ... [2022-11-20 12:26:24,327 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:26:24" (1/1) ... [2022-11-20 12:26:24,356 INFO L138 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 228 [2022-11-20 12:26:24,356 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:26:24,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:26:24,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:26:24,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:26:24,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:26:24" (1/1) ... [2022-11-20 12:26:24,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:26:24" (1/1) ... [2022-11-20 12:26:24,370 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:26:24" (1/1) ... [2022-11-20 12:26:24,370 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:26:24" (1/1) ... [2022-11-20 12:26:24,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:26:24" (1/1) ... [2022-11-20 12:26:24,384 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:26:24" (1/1) ... [2022-11-20 12:26:24,386 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:26:24" (1/1) ... [2022-11-20 12:26:24,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:26:24" (1/1) ... [2022-11-20 12:26:24,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:26:24,393 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:26:24,393 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:26:24,393 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:26:24,394 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:26:24" (1/1) ... [2022-11-20 12:26:24,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:26:24,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:26:24,443 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:26:24,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:26:24,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:26:24,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:26:24,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:26:24,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:26:24,583 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:26:24,585 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:26:25,065 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:26:25,073 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:26:25,073 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 12:26:25,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:26:25 BoogieIcfgContainer [2022-11-20 12:26:25,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:26:25,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:26:25,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:26:25,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:26:25,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:26:23" (1/3) ... [2022-11-20 12:26:25,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dae5a9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:26:25, skipping insertion in model container [2022-11-20 12:26:25,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:26:24" (2/3) ... [2022-11-20 12:26:25,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dae5a9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:26:25, skipping insertion in model container [2022-11-20 12:26:25,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:26:25" (3/3) ... [2022-11-20 12:26:25,086 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c [2022-11-20 12:26:25,106 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:26:25,107 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 12:26:25,159 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:26:25,166 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;@1b63559c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:26:25,167 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 12:26:25,179 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 67 states have (on average 1.7014925373134329) internal successors, (114), 68 states have internal predecessors, (114), 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 12:26:25,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 12:26:25,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:26:25,188 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] [2022-11-20 12:26:25,189 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:26:25,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:26:25,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1425545932, now seen corresponding path program 1 times [2022-11-20 12:26:25,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:26:25,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658566195] [2022-11-20 12:26:25,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:26:25,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:26:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:26:25,623 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 12:26:25,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:26:25,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658566195] [2022-11-20 12:26:25,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658566195] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:26:25,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:26:25,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:26:25,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464395727] [2022-11-20 12:26:25,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:26:25,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:26:25,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:26:25,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:26:25,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:26:25,670 INFO L87 Difference]: Start difference. First operand has 69 states, 67 states have (on average 1.7014925373134329) internal successors, (114), 68 states have internal predecessors, (114), 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 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 12:26:25,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:26:25,765 INFO L93 Difference]: Finished difference Result 115 states and 189 transitions. [2022-11-20 12:26:25,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:26:25,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 25 [2022-11-20 12:26:25,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:26:25,778 INFO L225 Difference]: With dead ends: 115 [2022-11-20 12:26:25,778 INFO L226 Difference]: Without dead ends: 65 [2022-11-20 12:26:25,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:26:25,785 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 3 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:26:25,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 400 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:26:25,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-20 12:26:25,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-11-20 12:26:25,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.40625) internal successors, (90), 64 states have internal predecessors, (90), 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 12:26:25,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 90 transitions. [2022-11-20 12:26:25,831 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 90 transitions. Word has length 25 [2022-11-20 12:26:25,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:26:25,832 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 90 transitions. [2022-11-20 12:26:25,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 12:26:25,832 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 90 transitions. [2022-11-20 12:26:25,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 12:26:25,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:26:25,834 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] [2022-11-20 12:26:25,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 12:26:25,835 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:26:25,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:26:25,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1477219222, now seen corresponding path program 1 times [2022-11-20 12:26:25,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:26:25,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663534296] [2022-11-20 12:26:25,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:26:25,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:26:25,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:26:26,000 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 12:26:26,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:26:26,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663534296] [2022-11-20 12:26:26,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663534296] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:26:26,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:26:26,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:26:26,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920494663] [2022-11-20 12:26:26,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:26:26,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:26:26,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:26:26,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:26:26,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:26:26,013 INFO L87 Difference]: Start difference. First operand 65 states and 90 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 12:26:26,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:26:26,072 INFO L93 Difference]: Finished difference Result 141 states and 210 transitions. [2022-11-20 12:26:26,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:26:26,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 41 [2022-11-20 12:26:26,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:26:26,075 INFO L225 Difference]: With dead ends: 141 [2022-11-20 12:26:26,075 INFO L226 Difference]: Without dead ends: 99 [2022-11-20 12:26:26,076 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 12:26:26,077 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 51 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:26:26,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 187 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:26:26,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-20 12:26:26,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2022-11-20 12:26:26,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.46875) internal successors, (141), 96 states have internal predecessors, (141), 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 12:26:26,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 141 transitions. [2022-11-20 12:26:26,106 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 141 transitions. Word has length 41 [2022-11-20 12:26:26,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:26:26,107 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 141 transitions. [2022-11-20 12:26:26,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 12:26:26,108 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 141 transitions. [2022-11-20 12:26:26,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 12:26:26,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:26:26,110 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] [2022-11-20 12:26:26,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 12:26:26,110 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:26:26,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:26:26,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1000300971, now seen corresponding path program 1 times [2022-11-20 12:26:26,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:26:26,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162176741] [2022-11-20 12:26:26,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:26:26,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:26:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:26:26,245 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 12:26:26,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:26:26,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162176741] [2022-11-20 12:26:26,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162176741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:26:26,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:26:26,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:26:26,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340034146] [2022-11-20 12:26:26,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:26:26,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:26:26,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:26:26,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:26:26,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:26:26,248 INFO L87 Difference]: Start difference. First operand 97 states and 141 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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 12:26:26,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:26:26,337 INFO L93 Difference]: Finished difference Result 393 states and 613 transitions. [2022-11-20 12:26:26,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:26:26,338 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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 41 [2022-11-20 12:26:26,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:26:26,341 INFO L225 Difference]: With dead ends: 393 [2022-11-20 12:26:26,341 INFO L226 Difference]: Without dead ends: 319 [2022-11-20 12:26:26,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:26:26,343 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 397 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:26:26,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 370 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:26:26,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-11-20 12:26:26,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 169. [2022-11-20 12:26:26,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.5119047619047619) internal successors, (254), 168 states have internal predecessors, (254), 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 12:26:26,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 254 transitions. [2022-11-20 12:26:26,396 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 254 transitions. Word has length 41 [2022-11-20 12:26:26,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:26:26,397 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 254 transitions. [2022-11-20 12:26:26,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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 12:26:26,397 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 254 transitions. [2022-11-20 12:26:26,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 12:26:26,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:26:26,400 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] [2022-11-20 12:26:26,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 12:26:26,401 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:26:26,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:26:26,405 INFO L85 PathProgramCache]: Analyzing trace with hash 561235574, now seen corresponding path program 1 times [2022-11-20 12:26:26,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:26:26,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113928389] [2022-11-20 12:26:26,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:26:26,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:26:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:26:26,699 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 12:26:26,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:26:26,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113928389] [2022-11-20 12:26:26,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113928389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:26:26,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:26:26,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:26:26,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103281688] [2022-11-20 12:26:26,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:26:26,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:26:26,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:26:26,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:26:26,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:26:26,703 INFO L87 Difference]: Start difference. First operand 169 states and 254 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 12:26:26,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:26:26,810 INFO L93 Difference]: Finished difference Result 331 states and 501 transitions. [2022-11-20 12:26:26,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:26:26,811 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 42 [2022-11-20 12:26:26,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:26:26,818 INFO L225 Difference]: With dead ends: 331 [2022-11-20 12:26:26,819 INFO L226 Difference]: Without dead ends: 329 [2022-11-20 12:26:26,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:26:26,824 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 180 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:26:26,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 404 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:26:26,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-11-20 12:26:26,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 181. [2022-11-20 12:26:26,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.4777777777777779) internal successors, (266), 180 states have internal predecessors, (266), 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 12:26:26,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 266 transitions. [2022-11-20 12:26:26,847 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 266 transitions. Word has length 42 [2022-11-20 12:26:26,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:26:26,847 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 266 transitions. [2022-11-20 12:26:26,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 12:26:26,847 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 266 transitions. [2022-11-20 12:26:26,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 12:26:26,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:26:26,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:26:26,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 12:26:26,855 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:26:26,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:26:26,855 INFO L85 PathProgramCache]: Analyzing trace with hash 271012067, now seen corresponding path program 1 times [2022-11-20 12:26:26,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:26:26,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603648310] [2022-11-20 12:26:26,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:26:26,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:26:26,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:26:26,933 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 12:26:26,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:26:26,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603648310] [2022-11-20 12:26:26,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603648310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:26:26,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:26:26,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:26:26,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696863860] [2022-11-20 12:26:26,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:26:26,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:26:26,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:26:26,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:26:26,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:26:26,937 INFO L87 Difference]: Start difference. First operand 181 states and 266 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 12:26:26,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:26:26,984 INFO L93 Difference]: Finished difference Result 467 states and 702 transitions. [2022-11-20 12:26:26,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:26:26,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 43 [2022-11-20 12:26:26,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:26:26,988 INFO L225 Difference]: With dead ends: 467 [2022-11-20 12:26:26,988 INFO L226 Difference]: Without dead ends: 309 [2022-11-20 12:26:26,991 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 12:26:27,000 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 39 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:26:27,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 149 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:26:27,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-11-20 12:26:27,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 303. [2022-11-20 12:26:27,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.4768211920529801) internal successors, (446), 302 states have internal predecessors, (446), 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 12:26:27,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 446 transitions. [2022-11-20 12:26:27,039 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 446 transitions. Word has length 43 [2022-11-20 12:26:27,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:26:27,039 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 446 transitions. [2022-11-20 12:26:27,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 12:26:27,042 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 446 transitions. [2022-11-20 12:26:27,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 12:26:27,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:26:27,051 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] [2022-11-20 12:26:27,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 12:26:27,052 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:26:27,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:26:27,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1222671217, now seen corresponding path program 1 times [2022-11-20 12:26:27,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:26:27,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176202066] [2022-11-20 12:26:27,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:26:27,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:26:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:26:27,142 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 12:26:27,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:26:27,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176202066] [2022-11-20 12:26:27,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176202066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:26:27,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:26:27,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:26:27,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184643754] [2022-11-20 12:26:27,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:26:27,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:26:27,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:26:27,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:26:27,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:26:27,144 INFO L87 Difference]: Start difference. First operand 303 states and 446 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 12:26:27,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:26:27,203 INFO L93 Difference]: Finished difference Result 799 states and 1180 transitions. [2022-11-20 12:26:27,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:26:27,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 44 [2022-11-20 12:26:27,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:26:27,206 INFO L225 Difference]: With dead ends: 799 [2022-11-20 12:26:27,206 INFO L226 Difference]: Without dead ends: 519 [2022-11-20 12:26:27,208 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 12:26:27,210 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 47 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:26:27,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 185 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:26:27,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-11-20 12:26:27,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 517. [2022-11-20 12:26:27,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.449612403100775) internal successors, (748), 516 states have internal predecessors, (748), 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 12:26:27,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 748 transitions. [2022-11-20 12:26:27,314 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 748 transitions. Word has length 44 [2022-11-20 12:26:27,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:26:27,316 INFO L495 AbstractCegarLoop]: Abstraction has 517 states and 748 transitions. [2022-11-20 12:26:27,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 12:26:27,316 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 748 transitions. [2022-11-20 12:26:27,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 12:26:27,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:26:27,319 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:26:27,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 12:26:27,320 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:26:27,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:26:27,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1273029565, now seen corresponding path program 1 times [2022-11-20 12:26:27,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:26:27,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801723546] [2022-11-20 12:26:27,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:26:27,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:26:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:26:27,413 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 12:26:27,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:26:27,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801723546] [2022-11-20 12:26:27,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801723546] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:26:27,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:26:27,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:26:27,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825030179] [2022-11-20 12:26:27,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:26:27,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:26:27,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:26:27,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:26:27,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:26:27,416 INFO L87 Difference]: Start difference. First operand 517 states and 748 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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 12:26:27,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:26:27,503 INFO L93 Difference]: Finished difference Result 1004 states and 1466 transitions. [2022-11-20 12:26:27,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:26:27,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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 45 [2022-11-20 12:26:27,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:26:27,507 INFO L225 Difference]: With dead ends: 1004 [2022-11-20 12:26:27,507 INFO L226 Difference]: Without dead ends: 721 [2022-11-20 12:26:27,508 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 12:26:27,511 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 52 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:26:27,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 197 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:26:27,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-11-20 12:26:27,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 719. [2022-11-20 12:26:27,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 1.434540389972145) internal successors, (1030), 718 states have internal predecessors, (1030), 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 12:26:27,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1030 transitions. [2022-11-20 12:26:27,579 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1030 transitions. Word has length 45 [2022-11-20 12:26:27,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:26:27,580 INFO L495 AbstractCegarLoop]: Abstraction has 719 states and 1030 transitions. [2022-11-20 12:26:27,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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 12:26:27,580 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1030 transitions. [2022-11-20 12:26:27,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 12:26:27,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:26:27,581 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 12:26:27,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 12:26:27,582 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:26:27,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:26:27,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1258504631, now seen corresponding path program 1 times [2022-11-20 12:26:27,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:26:27,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361888104] [2022-11-20 12:26:27,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:26:27,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:26:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:26:27,727 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:26:27,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:26:27,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361888104] [2022-11-20 12:26:27,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361888104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:26:27,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:26:27,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:26:27,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338582472] [2022-11-20 12:26:27,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:26:27,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:26:27,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:26:27,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:26:27,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:26:27,729 INFO L87 Difference]: Start difference. First operand 719 states and 1030 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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 12:26:27,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:26:27,931 INFO L93 Difference]: Finished difference Result 1659 states and 2418 transitions. [2022-11-20 12:26:27,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:26:27,932 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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 63 [2022-11-20 12:26:27,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:26:27,938 INFO L225 Difference]: With dead ends: 1659 [2022-11-20 12:26:27,938 INFO L226 Difference]: Without dead ends: 1305 [2022-11-20 12:26:27,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:26:27,940 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 236 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:26:27,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 403 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:26:27,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2022-11-20 12:26:28,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 1059. [2022-11-20 12:26:28,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 1.438563327032136) internal successors, (1522), 1058 states have internal predecessors, (1522), 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 12:26:28,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 1522 transitions. [2022-11-20 12:26:28,052 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 1522 transitions. Word has length 63 [2022-11-20 12:26:28,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:26:28,053 INFO L495 AbstractCegarLoop]: Abstraction has 1059 states and 1522 transitions. [2022-11-20 12:26:28,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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 12:26:28,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 1522 transitions. [2022-11-20 12:26:28,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 12:26:28,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:26:28,055 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 12:26:28,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 12:26:28,057 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:26:28,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:26:28,057 INFO L85 PathProgramCache]: Analyzing trace with hash -26861640, now seen corresponding path program 1 times [2022-11-20 12:26:28,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:26:28,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674323584] [2022-11-20 12:26:28,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:26:28,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:26:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:26:28,200 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 12:26:28,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:26:28,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674323584] [2022-11-20 12:26:28,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674323584] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:26:28,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:26:28,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:26:28,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176475222] [2022-11-20 12:26:28,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:26:28,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:26:28,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:26:28,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:26:28,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:26:28,202 INFO L87 Difference]: Start difference. First operand 1059 states and 1522 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 12:26:28,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:26:28,440 INFO L93 Difference]: Finished difference Result 1999 states and 2910 transitions. [2022-11-20 12:26:28,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:26:28,440 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 63 [2022-11-20 12:26:28,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:26:28,446 INFO L225 Difference]: With dead ends: 1999 [2022-11-20 12:26:28,446 INFO L226 Difference]: Without dead ends: 1645 [2022-11-20 12:26:28,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:26:28,449 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 242 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:26:28,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 381 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:26:28,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2022-11-20 12:26:28,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1399. [2022-11-20 12:26:28,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 1.4406294706723892) internal successors, (2014), 1398 states have internal predecessors, (2014), 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 12:26:28,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 2014 transitions. [2022-11-20 12:26:28,606 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 2014 transitions. Word has length 63 [2022-11-20 12:26:28,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:26:28,606 INFO L495 AbstractCegarLoop]: Abstraction has 1399 states and 2014 transitions. [2022-11-20 12:26:28,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 12:26:28,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 2014 transitions. [2022-11-20 12:26:28,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-20 12:26:28,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:26:28,608 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 12:26:28,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 12:26:28,608 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:26:28,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:26:28,609 INFO L85 PathProgramCache]: Analyzing trace with hash -618172044, now seen corresponding path program 1 times [2022-11-20 12:26:28,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:26:28,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183759802] [2022-11-20 12:26:28,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:26:28,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:26:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:26:28,707 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:26:28,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:26:28,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183759802] [2022-11-20 12:26:28,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183759802] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:26:28,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:26:28,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:26:28,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410357894] [2022-11-20 12:26:28,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:26:28,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:26:28,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:26:28,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:26:28,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:26:28,710 INFO L87 Difference]: Start difference. First operand 1399 states and 2014 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 12:26:28,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:26:28,883 INFO L93 Difference]: Finished difference Result 2775 states and 4004 transitions. [2022-11-20 12:26:28,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:26:28,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2022-11-20 12:26:28,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:26:28,888 INFO L225 Difference]: With dead ends: 2775 [2022-11-20 12:26:28,888 INFO L226 Difference]: Without dead ends: 1401 [2022-11-20 12:26:28,890 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 12:26:28,890 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 42 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:26:28,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 185 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:26:28,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2022-11-20 12:26:29,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1399. [2022-11-20 12:26:29,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 1.4234620886981402) internal successors, (1990), 1398 states have internal predecessors, (1990), 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 12:26:29,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 1990 transitions. [2022-11-20 12:26:29,023 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 1990 transitions. Word has length 64 [2022-11-20 12:26:29,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:26:29,024 INFO L495 AbstractCegarLoop]: Abstraction has 1399 states and 1990 transitions. [2022-11-20 12:26:29,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 12:26:29,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 1990 transitions. [2022-11-20 12:26:29,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-20 12:26:29,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:26:29,026 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 12:26:29,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 12:26:29,026 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:26:29,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:26:29,027 INFO L85 PathProgramCache]: Analyzing trace with hash -231923725, now seen corresponding path program 1 times [2022-11-20 12:26:29,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:26:29,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643888540] [2022-11-20 12:26:29,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:26:29,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:26:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:26:30,456 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:26:30,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:26:30,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643888540] [2022-11-20 12:26:30,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643888540] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:26:30,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571611059] [2022-11-20 12:26:30,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:26:30,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:26:30,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:26:30,461 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:26:30,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:26:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:26:30,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 12:26:30,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:26:30,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:26:30,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:26:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:26:31,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571611059] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:26:31,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:26:31,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4, 4] total 17 [2022-11-20 12:26:31,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748194776] [2022-11-20 12:26:31,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:26:31,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 12:26:31,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:26:31,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 12:26:31,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-11-20 12:26:31,207 INFO L87 Difference]: Start difference. First operand 1399 states and 1990 transitions. Second operand has 17 states, 17 states have (on average 10.470588235294118) internal successors, (178), 17 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:26:38,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:26:38,902 INFO L93 Difference]: Finished difference Result 14917 states and 20982 transitions. [2022-11-20 12:26:38,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-20 12:26:38,903 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 10.470588235294118) internal successors, (178), 17 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-11-20 12:26:38,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:26:38,950 INFO L225 Difference]: With dead ends: 14917 [2022-11-20 12:26:38,950 INFO L226 Difference]: Without dead ends: 13955 [2022-11-20 12:26:38,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2310 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1234, Invalid=5408, Unknown=0, NotChecked=0, Total=6642 [2022-11-20 12:26:38,957 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 3935 mSDsluCounter, 2016 mSDsCounter, 0 mSdLazyCounter, 1756 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3935 SdHoareTripleChecker+Valid, 2283 SdHoareTripleChecker+Invalid, 1830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:26:38,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3935 Valid, 2283 Invalid, 1830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1756 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-20 12:26:38,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13955 states. [2022-11-20 12:26:39,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13955 to 6643. [2022-11-20 12:26:39,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6643 states, 6642 states have (on average 1.394459500150557) internal successors, (9262), 6642 states have internal predecessors, (9262), 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 12:26:39,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6643 states to 6643 states and 9262 transitions. [2022-11-20 12:26:39,719 INFO L78 Accepts]: Start accepts. Automaton has 6643 states and 9262 transitions. Word has length 64 [2022-11-20 12:26:39,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:26:39,719 INFO L495 AbstractCegarLoop]: Abstraction has 6643 states and 9262 transitions. [2022-11-20 12:26:39,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 10.470588235294118) internal successors, (178), 17 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:26:39,720 INFO L276 IsEmpty]: Start isEmpty. Operand 6643 states and 9262 transitions. [2022-11-20 12:26:39,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-20 12:26:39,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:26:39,721 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] [2022-11-20 12:26:39,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 12:26:39,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:26:39,938 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:26:39,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:26:39,938 INFO L85 PathProgramCache]: Analyzing trace with hash -812650598, now seen corresponding path program 1 times [2022-11-20 12:26:39,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:26:39,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728933025] [2022-11-20 12:26:39,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:26:39,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:26:39,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:26:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:26:40,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:26:40,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728933025] [2022-11-20 12:26:40,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728933025] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:26:40,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:26:40,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:26:40,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606518402] [2022-11-20 12:26:40,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:26:40,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:26:40,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:26:40,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:26:40,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:26:40,031 INFO L87 Difference]: Start difference. First operand 6643 states and 9262 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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 12:26:40,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:26:40,973 INFO L93 Difference]: Finished difference Result 10481 states and 14706 transitions. [2022-11-20 12:26:40,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:26:40,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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 65 [2022-11-20 12:26:40,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:26:41,002 INFO L225 Difference]: With dead ends: 10481 [2022-11-20 12:26:41,002 INFO L226 Difference]: Without dead ends: 9225 [2022-11-20 12:26:41,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:26:41,007 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 229 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:26:41,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 419 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:26:41,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9225 states. [2022-11-20 12:26:41,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9225 to 7889. [2022-11-20 12:26:41,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7889 states, 7888 states have (on average 1.3932555780933062) internal successors, (10990), 7888 states have internal predecessors, (10990), 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 12:26:41,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7889 states to 7889 states and 10990 transitions. [2022-11-20 12:26:41,886 INFO L78 Accepts]: Start accepts. Automaton has 7889 states and 10990 transitions. Word has length 65 [2022-11-20 12:26:41,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:26:41,887 INFO L495 AbstractCegarLoop]: Abstraction has 7889 states and 10990 transitions. [2022-11-20 12:26:41,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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 12:26:41,887 INFO L276 IsEmpty]: Start isEmpty. Operand 7889 states and 10990 transitions. [2022-11-20 12:26:41,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-20 12:26:41,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:26:41,889 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 12:26:41,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 12:26:41,889 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:26:41,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:26:41,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1363863293, now seen corresponding path program 1 times [2022-11-20 12:26:41,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:26:41,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442224675] [2022-11-20 12:26:41,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:26:41,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:26:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:26:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:26:41,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:26:41,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442224675] [2022-11-20 12:26:41,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442224675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:26:41,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:26:41,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:26:41,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539905968] [2022-11-20 12:26:41,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:26:41,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:26:41,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:26:41,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:26:41,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:26:41,972 INFO L87 Difference]: Start difference. First operand 7889 states and 10990 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 12:26:42,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:26:42,316 INFO L93 Difference]: Finished difference Result 11284 states and 15685 transitions. [2022-11-20 12:26:42,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:26:42,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2022-11-20 12:26:42,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:26:42,324 INFO L225 Difference]: With dead ends: 11284 [2022-11-20 12:26:42,325 INFO L226 Difference]: Without dead ends: 3420 [2022-11-20 12:26:42,331 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 12:26:42,332 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 34 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:26:42,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 172 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:26:42,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3420 states. [2022-11-20 12:26:42,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3420 to 3418. [2022-11-20 12:26:42,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3418 states, 3417 states have (on average 1.3590869183494294) internal successors, (4644), 3417 states have internal predecessors, (4644), 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 12:26:42,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3418 states to 3418 states and 4644 transitions. [2022-11-20 12:26:42,674 INFO L78 Accepts]: Start accepts. Automaton has 3418 states and 4644 transitions. Word has length 66 [2022-11-20 12:26:42,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:26:42,675 INFO L495 AbstractCegarLoop]: Abstraction has 3418 states and 4644 transitions. [2022-11-20 12:26:42,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 12:26:42,675 INFO L276 IsEmpty]: Start isEmpty. Operand 3418 states and 4644 transitions. [2022-11-20 12:26:42,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-20 12:26:42,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:26:42,677 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] [2022-11-20 12:26:42,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 12:26:42,677 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:26:42,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:26:42,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1441709853, now seen corresponding path program 1 times [2022-11-20 12:26:42,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:26:42,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533297301] [2022-11-20 12:26:42,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:26:42,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:26:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:26:43,176 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:26:43,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:26:43,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533297301] [2022-11-20 12:26:43,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533297301] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:26:43,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315472179] [2022-11-20 12:26:43,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:26:43,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:26:43,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:26:43,178 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:26:43,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:26:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:26:43,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 12:26:43,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:26:44,426 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:26:44,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:26:45,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:26:45,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315472179] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:26:45,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:26:45,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 28 [2022-11-20 12:26:45,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801410462] [2022-11-20 12:26:45,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:26:45,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 12:26:45,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:26:45,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 12:26:45,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2022-11-20 12:26:45,918 INFO L87 Difference]: Start difference. First operand 3418 states and 4644 transitions. Second operand has 28 states, 28 states have (on average 6.607142857142857) internal successors, (185), 28 states have internal predecessors, (185), 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 12:26:50,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:26:50,557 INFO L93 Difference]: Finished difference Result 21525 states and 28728 transitions. [2022-11-20 12:26:50,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-20 12:26:50,557 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.607142857142857) internal successors, (185), 28 states have internal predecessors, (185), 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 68 [2022-11-20 12:26:50,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:26:50,594 INFO L225 Difference]: With dead ends: 21525 [2022-11-20 12:26:50,594 INFO L226 Difference]: Without dead ends: 18144 [2022-11-20 12:26:50,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1290, Invalid=3822, Unknown=0, NotChecked=0, Total=5112 [2022-11-20 12:26:50,603 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 1945 mSDsluCounter, 1208 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1945 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:26:50,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1945 Valid, 1326 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 12:26:50,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18144 states. [2022-11-20 12:26:51,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18144 to 7763. [2022-11-20 12:26:51,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7763 states, 7762 states have (on average 1.3347075496006184) internal successors, (10360), 7762 states have internal predecessors, (10360), 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 12:26:51,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7763 states to 7763 states and 10360 transitions. [2022-11-20 12:26:51,586 INFO L78 Accepts]: Start accepts. Automaton has 7763 states and 10360 transitions. Word has length 68 [2022-11-20 12:26:51,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:26:51,586 INFO L495 AbstractCegarLoop]: Abstraction has 7763 states and 10360 transitions. [2022-11-20 12:26:51,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.607142857142857) internal successors, (185), 28 states have internal predecessors, (185), 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 12:26:51,587 INFO L276 IsEmpty]: Start isEmpty. Operand 7763 states and 10360 transitions. [2022-11-20 12:26:51,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-20 12:26:51,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:26:51,588 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] [2022-11-20 12:26:51,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:26:51,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 12:26:51,794 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:26:51,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:26:51,795 INFO L85 PathProgramCache]: Analyzing trace with hash -737912097, now seen corresponding path program 1 times [2022-11-20 12:26:51,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:26:51,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297032338] [2022-11-20 12:26:51,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:26:51,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:26:51,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:26:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:26:52,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:26:52,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297032338] [2022-11-20 12:26:52,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297032338] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:26:52,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204053172] [2022-11-20 12:26:52,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:26:52,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:26:52,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:26:52,251 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:26:52,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:26:52,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:26:52,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 12:26:52,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:26:53,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:26:53,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:26:54,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:26:54,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204053172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:26:54,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:26:54,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 29 [2022-11-20 12:26:54,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276666284] [2022-11-20 12:26:54,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:26:54,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 12:26:54,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:26:54,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 12:26:54,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-11-20 12:26:54,428 INFO L87 Difference]: Start difference. First operand 7763 states and 10360 transitions. Second operand has 29 states, 29 states have (on average 5.931034482758621) internal successors, (172), 29 states have internal predecessors, (172), 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 12:26:58,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:26:58,255 INFO L93 Difference]: Finished difference Result 24445 states and 32629 transitions. [2022-11-20 12:26:58,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 12:26:58,256 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.931034482758621) internal successors, (172), 29 states have internal predecessors, (172), 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 68 [2022-11-20 12:26:58,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:26:58,284 INFO L225 Difference]: With dead ends: 24445 [2022-11-20 12:26:58,284 INFO L226 Difference]: Without dead ends: 16750 [2022-11-20 12:26:58,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=991, Invalid=2915, Unknown=0, NotChecked=0, Total=3906 [2022-11-20 12:26:58,297 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 2036 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2036 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:26:58,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2036 Valid, 1300 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 12:26:58,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16750 states. [2022-11-20 12:26:59,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16750 to 7988. [2022-11-20 12:26:59,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7988 states, 7987 states have (on average 1.3342932264930512) internal successors, (10657), 7987 states have internal predecessors, (10657), 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 12:26:59,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7988 states to 7988 states and 10657 transitions. [2022-11-20 12:26:59,292 INFO L78 Accepts]: Start accepts. Automaton has 7988 states and 10657 transitions. Word has length 68 [2022-11-20 12:26:59,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:26:59,293 INFO L495 AbstractCegarLoop]: Abstraction has 7988 states and 10657 transitions. [2022-11-20 12:26:59,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.931034482758621) internal successors, (172), 29 states have internal predecessors, (172), 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 12:26:59,293 INFO L276 IsEmpty]: Start isEmpty. Operand 7988 states and 10657 transitions. [2022-11-20 12:26:59,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-20 12:26:59,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:26:59,295 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 12:26:59,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-20 12:26:59,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 12:26:59,500 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:26:59,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:26:59,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1946824194, now seen corresponding path program 1 times [2022-11-20 12:26:59,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:26:59,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014209012] [2022-11-20 12:26:59,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:26:59,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:26:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:26:59,578 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:26:59,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:26:59,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014209012] [2022-11-20 12:26:59,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014209012] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:26:59,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:26:59,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:26:59,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87369190] [2022-11-20 12:26:59,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:26:59,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:26:59,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:26:59,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:26:59,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:26:59,581 INFO L87 Difference]: Start difference. First operand 7988 states and 10657 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 12:27:00,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:27:00,124 INFO L93 Difference]: Finished difference Result 12065 states and 16074 transitions. [2022-11-20 12:27:00,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:27:00,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 68 [2022-11-20 12:27:00,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:27:00,131 INFO L225 Difference]: With dead ends: 12065 [2022-11-20 12:27:00,131 INFO L226 Difference]: Without dead ends: 5204 [2022-11-20 12:27:00,139 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 12:27:00,140 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 23 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:27:00,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 153 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:27:00,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5204 states. [2022-11-20 12:27:00,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5204 to 5202. [2022-11-20 12:27:00,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5202 states, 5201 states have (on average 1.2999423187848491) internal successors, (6761), 5201 states have internal predecessors, (6761), 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 12:27:00,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5202 states to 5202 states and 6761 transitions. [2022-11-20 12:27:00,771 INFO L78 Accepts]: Start accepts. Automaton has 5202 states and 6761 transitions. Word has length 68 [2022-11-20 12:27:00,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:27:00,771 INFO L495 AbstractCegarLoop]: Abstraction has 5202 states and 6761 transitions. [2022-11-20 12:27:00,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 12:27:00,772 INFO L276 IsEmpty]: Start isEmpty. Operand 5202 states and 6761 transitions. [2022-11-20 12:27:00,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-20 12:27:00,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:27:00,774 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] [2022-11-20 12:27:00,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 12:27:00,774 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:27:00,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:00,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1394499805, now seen corresponding path program 1 times [2022-11-20 12:27:00,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:00,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867331275] [2022-11-20 12:27:00,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:00,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:00,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:01,102 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:01,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:01,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867331275] [2022-11-20 12:27:01,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867331275] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:27:01,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96504208] [2022-11-20 12:27:01,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:01,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:27:01,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:27:01,105 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:27:01,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 12:27:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:01,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 12:27:01,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:27:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:01,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:27:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:03,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96504208] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:27:03,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:27:03,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12] total 28 [2022-11-20 12:27:03,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023481546] [2022-11-20 12:27:03,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:27:03,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 12:27:03,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:27:03,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 12:27:03,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2022-11-20 12:27:03,209 INFO L87 Difference]: Start difference. First operand 5202 states and 6761 transitions. Second operand has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 28 states have internal predecessors, (176), 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 12:27:07,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:27:07,846 INFO L93 Difference]: Finished difference Result 28902 states and 36533 transitions. [2022-11-20 12:27:07,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 12:27:07,847 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 28 states have internal predecessors, (176), 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 68 [2022-11-20 12:27:07,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:27:07,868 INFO L225 Difference]: With dead ends: 28902 [2022-11-20 12:27:07,868 INFO L226 Difference]: Without dead ends: 23757 [2022-11-20 12:27:07,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=562, Invalid=1790, Unknown=0, NotChecked=0, Total=2352 [2022-11-20 12:27:07,877 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 1461 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1461 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:27:07,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1461 Valid, 1125 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 12:27:07,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23757 states. [2022-11-20 12:27:09,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23757 to 11406. [2022-11-20 12:27:09,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11406 states, 11405 states have (on average 1.2590092064883822) internal successors, (14359), 11405 states have internal predecessors, (14359), 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 12:27:09,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11406 states to 11406 states and 14359 transitions. [2022-11-20 12:27:09,396 INFO L78 Accepts]: Start accepts. Automaton has 11406 states and 14359 transitions. Word has length 68 [2022-11-20 12:27:09,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:27:09,396 INFO L495 AbstractCegarLoop]: Abstraction has 11406 states and 14359 transitions. [2022-11-20 12:27:09,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 28 states have internal predecessors, (176), 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 12:27:09,397 INFO L276 IsEmpty]: Start isEmpty. Operand 11406 states and 14359 transitions. [2022-11-20 12:27:09,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-20 12:27:09,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:27:09,399 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] [2022-11-20 12:27:09,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 12:27:09,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 12:27:09,604 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:27:09,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:09,605 INFO L85 PathProgramCache]: Analyzing trace with hash -316968284, now seen corresponding path program 1 times [2022-11-20 12:27:09,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:09,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152592714] [2022-11-20 12:27:09,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:09,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:09,698 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:09,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:09,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152592714] [2022-11-20 12:27:09,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152592714] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:27:09,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:27:09,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:27:09,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788272592] [2022-11-20 12:27:09,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:27:09,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:27:09,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:27:09,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:27:09,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:27:09,701 INFO L87 Difference]: Start difference. First operand 11406 states and 14359 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 12:27:11,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:27:11,880 INFO L93 Difference]: Finished difference Result 27350 states and 34407 transitions. [2022-11-20 12:27:11,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:27:11,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 69 [2022-11-20 12:27:11,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:27:11,899 INFO L225 Difference]: With dead ends: 27350 [2022-11-20 12:27:11,899 INFO L226 Difference]: Without dead ends: 16213 [2022-11-20 12:27:11,908 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 12:27:11,909 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 34 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:27:11,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 215 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:27:11,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16213 states. [2022-11-20 12:27:13,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16213 to 15317. [2022-11-20 12:27:13,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15317 states, 15316 states have (on average 1.2449725776965266) internal successors, (19068), 15316 states have internal predecessors, (19068), 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 12:27:13,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15317 states to 15317 states and 19068 transitions. [2022-11-20 12:27:13,807 INFO L78 Accepts]: Start accepts. Automaton has 15317 states and 19068 transitions. Word has length 69 [2022-11-20 12:27:13,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:27:13,807 INFO L495 AbstractCegarLoop]: Abstraction has 15317 states and 19068 transitions. [2022-11-20 12:27:13,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 12:27:13,808 INFO L276 IsEmpty]: Start isEmpty. Operand 15317 states and 19068 transitions. [2022-11-20 12:27:13,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-20 12:27:13,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:27:13,810 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] [2022-11-20 12:27:13,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 12:27:13,810 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:27:13,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:13,811 INFO L85 PathProgramCache]: Analyzing trace with hash 524526898, now seen corresponding path program 1 times [2022-11-20 12:27:13,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:13,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32452075] [2022-11-20 12:27:13,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:13,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:13,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:13,852 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:13,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:13,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32452075] [2022-11-20 12:27:13,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32452075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:27:13,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:27:13,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:27:13,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160449285] [2022-11-20 12:27:13,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:27:13,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:27:13,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:27:13,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:27:13,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:27:13,855 INFO L87 Difference]: Start difference. First operand 15317 states and 19068 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 12:27:16,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:27:16,725 INFO L93 Difference]: Finished difference Result 34349 states and 42955 transitions. [2022-11-20 12:27:16,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:27:16,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 69 [2022-11-20 12:27:16,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:27:16,750 INFO L225 Difference]: With dead ends: 34349 [2022-11-20 12:27:16,750 INFO L226 Difference]: Without dead ends: 20612 [2022-11-20 12:27:16,762 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 12:27:16,763 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 41 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:27:16,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 171 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:27:16,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20612 states. [2022-11-20 12:27:19,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20612 to 20610. [2022-11-20 12:27:19,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20610 states, 20609 states have (on average 1.2339269251297977) internal successors, (25430), 20609 states have internal predecessors, (25430), 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 12:27:19,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20610 states to 20610 states and 25430 transitions. [2022-11-20 12:27:19,557 INFO L78 Accepts]: Start accepts. Automaton has 20610 states and 25430 transitions. Word has length 69 [2022-11-20 12:27:19,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:27:19,558 INFO L495 AbstractCegarLoop]: Abstraction has 20610 states and 25430 transitions. [2022-11-20 12:27:19,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 12:27:19,558 INFO L276 IsEmpty]: Start isEmpty. Operand 20610 states and 25430 transitions. [2022-11-20 12:27:19,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-20 12:27:19,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:27:19,561 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] [2022-11-20 12:27:19,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-20 12:27:19,561 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:27:19,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:19,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1554454534, now seen corresponding path program 1 times [2022-11-20 12:27:19,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:19,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373733376] [2022-11-20 12:27:19,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:19,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:19,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:19,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:19,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373733376] [2022-11-20 12:27:19,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373733376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:27:19,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:27:19,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:27:19,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396155216] [2022-11-20 12:27:19,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:27:19,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:27:19,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:27:19,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:27:19,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:27:19,607 INFO L87 Difference]: Start difference. First operand 20610 states and 25430 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 12:27:21,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:27:21,972 INFO L93 Difference]: Finished difference Result 26561 states and 32682 transitions. [2022-11-20 12:27:21,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:27:21,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 69 [2022-11-20 12:27:21,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:27:21,988 INFO L225 Difference]: With dead ends: 26561 [2022-11-20 12:27:21,988 INFO L226 Difference]: Without dead ends: 17264 [2022-11-20 12:27:21,995 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 12:27:21,995 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 38 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:27:21,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 179 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:27:22,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17264 states. [2022-11-20 12:27:24,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17264 to 17262. [2022-11-20 12:27:24,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17262 states, 17261 states have (on average 1.21707896413881) internal successors, (21008), 17261 states have internal predecessors, (21008), 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 12:27:24,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17262 states to 17262 states and 21008 transitions. [2022-11-20 12:27:24,844 INFO L78 Accepts]: Start accepts. Automaton has 17262 states and 21008 transitions. Word has length 69 [2022-11-20 12:27:24,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:27:24,845 INFO L495 AbstractCegarLoop]: Abstraction has 17262 states and 21008 transitions. [2022-11-20 12:27:24,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 12:27:24,845 INFO L276 IsEmpty]: Start isEmpty. Operand 17262 states and 21008 transitions. [2022-11-20 12:27:24,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-20 12:27:24,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:27:24,848 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] [2022-11-20 12:27:24,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-20 12:27:24,848 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:27:24,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:24,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1061524558, now seen corresponding path program 1 times [2022-11-20 12:27:24,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:24,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911367372] [2022-11-20 12:27:24,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:24,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:24,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:24,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:24,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911367372] [2022-11-20 12:27:24,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911367372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:27:24,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:27:24,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:27:24,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089398559] [2022-11-20 12:27:24,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:27:24,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:27:24,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:27:24,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:27:24,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:27:24,900 INFO L87 Difference]: Start difference. First operand 17262 states and 21008 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 12:27:28,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:27:28,494 INFO L93 Difference]: Finished difference Result 38053 states and 46429 transitions. [2022-11-20 12:27:28,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:27:28,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 69 [2022-11-20 12:27:28,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:27:28,514 INFO L225 Difference]: With dead ends: 38053 [2022-11-20 12:27:28,514 INFO L226 Difference]: Without dead ends: 22798 [2022-11-20 12:27:28,521 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 12:27:28,522 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 35 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:27:28,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 195 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:27:28,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22798 states. [2022-11-20 12:27:32,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22798 to 22796. [2022-11-20 12:27:32,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22796 states, 22795 states have (on average 1.191708708050011) internal successors, (27165), 22795 states have internal predecessors, (27165), 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 12:27:32,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22796 states to 22796 states and 27165 transitions. [2022-11-20 12:27:32,079 INFO L78 Accepts]: Start accepts. Automaton has 22796 states and 27165 transitions. Word has length 69 [2022-11-20 12:27:32,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:27:32,080 INFO L495 AbstractCegarLoop]: Abstraction has 22796 states and 27165 transitions. [2022-11-20 12:27:32,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 12:27:32,080 INFO L276 IsEmpty]: Start isEmpty. Operand 22796 states and 27165 transitions. [2022-11-20 12:27:32,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-20 12:27:32,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:27:32,083 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] [2022-11-20 12:27:32,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-20 12:27:32,083 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:27:32,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:32,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1094010052, now seen corresponding path program 1 times [2022-11-20 12:27:32,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:32,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198290808] [2022-11-20 12:27:32,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:32,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:32,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:32,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:32,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198290808] [2022-11-20 12:27:32,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198290808] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:27:32,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:27:32,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:27:32,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875738584] [2022-11-20 12:27:32,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:27:32,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:27:32,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:27:32,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:27:32,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:27:32,127 INFO L87 Difference]: Start difference. First operand 22796 states and 27165 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 12:27:35,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:27:35,591 INFO L93 Difference]: Finished difference Result 36398 states and 43239 transitions. [2022-11-20 12:27:35,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:27:35,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 69 [2022-11-20 12:27:35,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:27:35,616 INFO L225 Difference]: With dead ends: 36398 [2022-11-20 12:27:35,616 INFO L226 Difference]: Without dead ends: 22251 [2022-11-20 12:27:35,624 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 12:27:35,626 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 35 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:27:35,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 214 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:27:35,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22251 states. [2022-11-20 12:27:39,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22251 to 21232. [2022-11-20 12:27:39,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21232 states, 21231 states have (on average 1.17686401959399) internal successors, (24986), 21231 states have internal predecessors, (24986), 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 12:27:39,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21232 states to 21232 states and 24986 transitions. [2022-11-20 12:27:39,115 INFO L78 Accepts]: Start accepts. Automaton has 21232 states and 24986 transitions. Word has length 69 [2022-11-20 12:27:39,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:27:39,115 INFO L495 AbstractCegarLoop]: Abstraction has 21232 states and 24986 transitions. [2022-11-20 12:27:39,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 12:27:39,115 INFO L276 IsEmpty]: Start isEmpty. Operand 21232 states and 24986 transitions. [2022-11-20 12:27:39,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-20 12:27:39,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:27:39,118 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] [2022-11-20 12:27:39,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-20 12:27:39,119 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:27:39,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:39,119 INFO L85 PathProgramCache]: Analyzing trace with hash -275378682, now seen corresponding path program 1 times [2022-11-20 12:27:39,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:39,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490268476] [2022-11-20 12:27:39,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:39,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:39,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:39,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:39,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490268476] [2022-11-20 12:27:39,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490268476] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:27:39,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:27:39,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:27:39,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744233219] [2022-11-20 12:27:39,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:27:39,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:27:39,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:27:39,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:27:39,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:27:39,162 INFO L87 Difference]: Start difference. First operand 21232 states and 24986 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 12:27:42,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:27:42,272 INFO L93 Difference]: Finished difference Result 33468 states and 39278 transitions. [2022-11-20 12:27:42,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:27:42,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 69 [2022-11-20 12:27:42,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:27:42,290 INFO L225 Difference]: With dead ends: 33468 [2022-11-20 12:27:42,290 INFO L226 Difference]: Without dead ends: 19829 [2022-11-20 12:27:42,300 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 12:27:42,301 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 38 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:27:42,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 217 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:27:42,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19829 states. [2022-11-20 12:27:45,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19829 to 19023. [2022-11-20 12:27:45,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19023 states, 19022 states have (on average 1.1631269056881506) internal successors, (22125), 19022 states have internal predecessors, (22125), 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 12:27:45,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19023 states to 19023 states and 22125 transitions. [2022-11-20 12:27:45,215 INFO L78 Accepts]: Start accepts. Automaton has 19023 states and 22125 transitions. Word has length 69 [2022-11-20 12:27:45,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:27:45,215 INFO L495 AbstractCegarLoop]: Abstraction has 19023 states and 22125 transitions. [2022-11-20 12:27:45,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 12:27:45,216 INFO L276 IsEmpty]: Start isEmpty. Operand 19023 states and 22125 transitions. [2022-11-20 12:27:45,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-20 12:27:45,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:27:45,217 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] [2022-11-20 12:27:45,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-20 12:27:45,217 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:27:45,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:45,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1424960161, now seen corresponding path program 1 times [2022-11-20 12:27:45,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:45,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010548210] [2022-11-20 12:27:45,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:45,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:45,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:45,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:45,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010548210] [2022-11-20 12:27:45,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010548210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:27:45,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158653671] [2022-11-20 12:27:45,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:45,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:27:45,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:27:45,336 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:27:45,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 12:27:45,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:45,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 12:27:45,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:27:45,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:45,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:27:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:45,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158653671] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:27:45,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:27:45,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-11-20 12:27:45,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662661681] [2022-11-20 12:27:45,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:27:45,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 12:27:45,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:27:45,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 12:27:45,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:27:45,766 INFO L87 Difference]: Start difference. First operand 19023 states and 22125 transitions. Second operand has 11 states, 11 states have (on average 11.0) internal successors, (121), 10 states have internal predecessors, (121), 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 12:27:49,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:27:49,567 INFO L93 Difference]: Finished difference Result 25285 states and 29318 transitions. [2022-11-20 12:27:49,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:27:49,569 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.0) internal successors, (121), 10 states have internal predecessors, (121), 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 70 [2022-11-20 12:27:49,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:27:49,590 INFO L225 Difference]: With dead ends: 25285 [2022-11-20 12:27:49,590 INFO L226 Difference]: Without dead ends: 22173 [2022-11-20 12:27:49,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 130 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:27:49,595 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 484 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:27:49,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 245 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:27:49,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22173 states. [2022-11-20 12:27:52,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22173 to 18916. [2022-11-20 12:27:52,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18916 states, 18915 states have (on average 1.1601374570446736) internal successors, (21944), 18915 states have internal predecessors, (21944), 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 12:27:52,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18916 states to 18916 states and 21944 transitions. [2022-11-20 12:27:52,669 INFO L78 Accepts]: Start accepts. Automaton has 18916 states and 21944 transitions. Word has length 70 [2022-11-20 12:27:52,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:27:52,670 INFO L495 AbstractCegarLoop]: Abstraction has 18916 states and 21944 transitions. [2022-11-20 12:27:52,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.0) internal successors, (121), 10 states have internal predecessors, (121), 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 12:27:52,670 INFO L276 IsEmpty]: Start isEmpty. Operand 18916 states and 21944 transitions. [2022-11-20 12:27:52,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-20 12:27:52,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:27:52,672 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] [2022-11-20 12:27:52,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-20 12:27:52,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 12:27:52,877 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:27:52,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:52,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1355477905, now seen corresponding path program 1 times [2022-11-20 12:27:52,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:52,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620721904] [2022-11-20 12:27:52,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:52,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:54,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:54,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620721904] [2022-11-20 12:27:54,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620721904] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:27:54,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178358525] [2022-11-20 12:27:54,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:54,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:27:54,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:27:54,594 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:27:54,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 12:27:54,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:54,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 12:27:54,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:27:55,627 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:55,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:00,027 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:00,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178358525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:28:00,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:28:00,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 15] total 43 [2022-11-20 12:28:00,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651805687] [2022-11-20 12:28:00,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:28:00,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 12:28:00,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:00,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 12:28:00,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 12:28:00,030 INFO L87 Difference]: Start difference. First operand 18916 states and 21944 transitions. Second operand has 43 states, 43 states have (on average 4.511627906976744) internal successors, (194), 43 states have internal predecessors, (194), 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 12:29:28,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:29:28,000 INFO L93 Difference]: Finished difference Result 56097 states and 65024 transitions. [2022-11-20 12:29:28,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 395 states. [2022-11-20 12:29:28,000 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.511627906976744) internal successors, (194), 43 states have internal predecessors, (194), 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 70 [2022-11-20 12:29:28,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:29:28,049 INFO L225 Difference]: With dead ends: 56097 [2022-11-20 12:29:28,049 INFO L226 Difference]: Without dead ends: 50074 [2022-11-20 12:29:28,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 106 SyntacticMatches, 11 SemanticMatches, 434 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82635 ImplicationChecksByTransitivity, 73.4s TimeCoverageRelationStatistics Valid=25999, Invalid=163661, Unknown=0, NotChecked=0, Total=189660 [2022-11-20 12:29:28,083 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 12618 mSDsluCounter, 5396 mSDsCounter, 0 mSdLazyCounter, 4053 mSolverCounterSat, 497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12618 SdHoareTripleChecker+Valid, 5667 SdHoareTripleChecker+Invalid, 4550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 4053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:29:28,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12618 Valid, 5667 Invalid, 4550 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [497 Valid, 4053 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-20 12:29:28,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50074 states. [2022-11-20 12:29:32,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50074 to 17334. [2022-11-20 12:29:32,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17334 states, 17333 states have (on average 1.1573876420700397) internal successors, (20061), 17333 states have internal predecessors, (20061), 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 12:29:32,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17334 states to 17334 states and 20061 transitions. [2022-11-20 12:29:32,060 INFO L78 Accepts]: Start accepts. Automaton has 17334 states and 20061 transitions. Word has length 70 [2022-11-20 12:29:32,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:29:32,060 INFO L495 AbstractCegarLoop]: Abstraction has 17334 states and 20061 transitions. [2022-11-20 12:29:32,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.511627906976744) internal successors, (194), 43 states have internal predecessors, (194), 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 12:29:32,060 INFO L276 IsEmpty]: Start isEmpty. Operand 17334 states and 20061 transitions. [2022-11-20 12:29:32,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-20 12:29:32,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:29:32,061 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] [2022-11-20 12:29:32,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 12:29:32,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:29:32,265 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:29:32,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:29:32,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1404516557, now seen corresponding path program 1 times [2022-11-20 12:29:32,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:29:32,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931276099] [2022-11-20 12:29:32,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:29:32,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:29:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:29:33,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:33,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:29:33,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931276099] [2022-11-20 12:29:33,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931276099] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:29:33,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082909882] [2022-11-20 12:29:33,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:29:33,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:29:33,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:29:33,132 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:29:33,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 12:29:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:29:33,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 12:29:33,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:29:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:35,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:29:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:38,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082909882] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:29:38,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:29:38,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 38 [2022-11-20 12:29:38,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322769335] [2022-11-20 12:29:38,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:29:38,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-20 12:29:38,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:29:38,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-20 12:29:38,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 12:29:38,134 INFO L87 Difference]: Start difference. First operand 17334 states and 20061 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 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 12:30:21,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:30:21,050 INFO L93 Difference]: Finished difference Result 40088 states and 45841 transitions. [2022-11-20 12:30:21,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2022-11-20 12:30:21,051 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 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 70 [2022-11-20 12:30:21,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:30:21,081 INFO L225 Difference]: With dead ends: 40088 [2022-11-20 12:30:21,081 INFO L226 Difference]: Without dead ends: 33135 [2022-11-20 12:30:21,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23229 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=9720, Invalid=43872, Unknown=0, NotChecked=0, Total=53592 [2022-11-20 12:30:21,090 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 4880 mSDsluCounter, 5179 mSDsCounter, 0 mSdLazyCounter, 3343 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4880 SdHoareTripleChecker+Valid, 5414 SdHoareTripleChecker+Invalid, 3549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 3343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:30:21,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4880 Valid, 5414 Invalid, 3549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 3343 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-20 12:30:21,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33135 states. [2022-11-20 12:30:24,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33135 to 14286. [2022-11-20 12:30:24,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14286 states, 14285 states have (on average 1.152397619880994) internal successors, (16462), 14285 states have internal predecessors, (16462), 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 12:30:24,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14286 states to 14286 states and 16462 transitions. [2022-11-20 12:30:24,536 INFO L78 Accepts]: Start accepts. Automaton has 14286 states and 16462 transitions. Word has length 70 [2022-11-20 12:30:24,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:30:24,537 INFO L495 AbstractCegarLoop]: Abstraction has 14286 states and 16462 transitions. [2022-11-20 12:30:24,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 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 12:30:24,537 INFO L276 IsEmpty]: Start isEmpty. Operand 14286 states and 16462 transitions. [2022-11-20 12:30:24,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-20 12:30:24,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:30:24,541 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2022-11-20 12:30:24,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 12:30:24,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-20 12:30:24,747 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:30:24,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:30:24,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1853227704, now seen corresponding path program 1 times [2022-11-20 12:30:24,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:30:24,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647768245] [2022-11-20 12:30:24,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:30:24,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:30:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:30:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-20 12:30:24,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:30:24,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647768245] [2022-11-20 12:30:24,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647768245] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:30:24,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900881927] [2022-11-20 12:30:24,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:30:24,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:30:24,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:30:24,885 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:30:24,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 12:30:24,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:30:24,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 12:30:24,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:30:25,204 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-20 12:30:25,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:30:25,329 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-20 12:30:25,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900881927] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:30:25,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:30:25,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-11-20 12:30:25,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720100088] [2022-11-20 12:30:25,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:30:25,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:30:25,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:30:25,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:30:25,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:30:25,332 INFO L87 Difference]: Start difference. First operand 14286 states and 16462 transitions. Second operand has 16 states, 16 states have (on average 11.8125) internal successors, (189), 15 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 12:30:30,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:30:30,791 INFO L93 Difference]: Finished difference Result 20711 states and 24121 transitions. [2022-11-20 12:30:30,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 12:30:30,792 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.8125) internal successors, (189), 15 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 115 [2022-11-20 12:30:30,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:30:30,806 INFO L225 Difference]: With dead ends: 20711 [2022-11-20 12:30:30,806 INFO L226 Difference]: Without dead ends: 18437 [2022-11-20 12:30:30,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2022-11-20 12:30:30,809 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 868 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:30:30,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [868 Valid, 340 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:30:30,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18437 states. [2022-11-20 12:30:34,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18437 to 13822. [2022-11-20 12:30:34,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13822 states, 13821 states have (on average 1.15107445192099) internal successors, (15909), 13821 states have internal predecessors, (15909), 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 12:30:34,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13822 states to 13822 states and 15909 transitions. [2022-11-20 12:30:34,171 INFO L78 Accepts]: Start accepts. Automaton has 13822 states and 15909 transitions. Word has length 115 [2022-11-20 12:30:34,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:30:34,171 INFO L495 AbstractCegarLoop]: Abstraction has 13822 states and 15909 transitions. [2022-11-20 12:30:34,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.8125) internal successors, (189), 15 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 12:30:34,171 INFO L276 IsEmpty]: Start isEmpty. Operand 13822 states and 15909 transitions. [2022-11-20 12:30:34,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-20 12:30:34,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:30:34,176 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2022-11-20 12:30:34,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 12:30:34,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-20 12:30:34,377 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:30:34,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:30:34,377 INFO L85 PathProgramCache]: Analyzing trace with hash 690536508, now seen corresponding path program 1 times [2022-11-20 12:30:34,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:30:34,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307140003] [2022-11-20 12:30:34,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:30:34,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:30:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:30:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 55 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-20 12:30:34,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:30:34,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307140003] [2022-11-20 12:30:34,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307140003] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:30:34,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7748556] [2022-11-20 12:30:34,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:30:34,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:30:34,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:30:34,511 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:30:34,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 12:30:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:30:34,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 12:30:34,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:30:34,820 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 55 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-20 12:30:34,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:30:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 55 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-20 12:30:34,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7748556] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:30:34,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:30:34,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-11-20 12:30:34,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63930573] [2022-11-20 12:30:34,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:30:34,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:30:34,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:30:34,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:30:34,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:30:34,955 INFO L87 Difference]: Start difference. First operand 13822 states and 15909 transitions. Second operand has 16 states, 16 states have (on average 12.375) internal successors, (198), 15 states have internal predecessors, (198), 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 12:30:40,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:30:40,302 INFO L93 Difference]: Finished difference Result 21096 states and 24385 transitions. [2022-11-20 12:30:40,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 12:30:40,303 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 12.375) internal successors, (198), 15 states have internal predecessors, (198), 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 115 [2022-11-20 12:30:40,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:30:40,318 INFO L225 Difference]: With dead ends: 21096 [2022-11-20 12:30:40,318 INFO L226 Difference]: Without dead ends: 18253 [2022-11-20 12:30:40,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2022-11-20 12:30:40,321 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 624 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:30:40,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 417 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:30:40,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18253 states. [2022-11-20 12:30:43,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18253 to 13427. [2022-11-20 12:30:43,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13427 states, 13426 states have (on average 1.1474005660658424) internal successors, (15405), 13426 states have internal predecessors, (15405), 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 12:30:43,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13427 states to 13427 states and 15405 transitions. [2022-11-20 12:30:43,706 INFO L78 Accepts]: Start accepts. Automaton has 13427 states and 15405 transitions. Word has length 115 [2022-11-20 12:30:43,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:30:43,706 INFO L495 AbstractCegarLoop]: Abstraction has 13427 states and 15405 transitions. [2022-11-20 12:30:43,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.375) internal successors, (198), 15 states have internal predecessors, (198), 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 12:30:43,707 INFO L276 IsEmpty]: Start isEmpty. Operand 13427 states and 15405 transitions. [2022-11-20 12:30:43,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-20 12:30:43,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:30:43,710 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 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 12:30:43,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 12:30:43,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-20 12:30:43,913 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:30:43,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:30:43,914 INFO L85 PathProgramCache]: Analyzing trace with hash -2029584764, now seen corresponding path program 1 times [2022-11-20 12:30:43,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:30:43,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165648802] [2022-11-20 12:30:43,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:30:43,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:30:43,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:30:45,204 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:30:45,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:30:45,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165648802] [2022-11-20 12:30:45,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165648802] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:30:45,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744114291] [2022-11-20 12:30:45,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:30:45,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:30:45,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:30:45,206 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:30:45,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 12:30:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:30:45,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 12:30:45,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:30:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:30:47,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:30:52,950 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:30:52,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744114291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:30:52,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:30:52,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 52 [2022-11-20 12:30:52,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116033551] [2022-11-20 12:30:52,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:30:52,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-20 12:30:52,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:30:52,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-20 12:30:52,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=2375, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 12:30:52,953 INFO L87 Difference]: Start difference. First operand 13427 states and 15405 transitions. Second operand has 52 states, 52 states have (on average 6.4423076923076925) internal successors, (335), 52 states have internal predecessors, (335), 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 12:31:40,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:31:40,900 INFO L93 Difference]: Finished difference Result 31864 states and 36216 transitions. [2022-11-20 12:31:40,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2022-11-20 12:31:40,901 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 6.4423076923076925) internal successors, (335), 52 states have internal predecessors, (335), 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 117 [2022-11-20 12:31:40,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:31:40,926 INFO L225 Difference]: With dead ends: 31864 [2022-11-20 12:31:40,926 INFO L226 Difference]: Without dead ends: 30377 [2022-11-20 12:31:40,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19625 ImplicationChecksByTransitivity, 33.7s TimeCoverageRelationStatistics Valid=8212, Invalid=46310, Unknown=0, NotChecked=0, Total=54522 [2022-11-20 12:31:40,933 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 5657 mSDsluCounter, 7202 mSDsCounter, 0 mSdLazyCounter, 5177 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5657 SdHoareTripleChecker+Valid, 7646 SdHoareTripleChecker+Invalid, 5476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 5177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:31:40,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5657 Valid, 7646 Invalid, 5476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 5177 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-20 12:31:40,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30377 states. [2022-11-20 12:31:45,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30377 to 14322. [2022-11-20 12:31:45,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14322 states, 14321 states have (on average 1.1456602192584318) internal successors, (16407), 14321 states have internal predecessors, (16407), 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 12:31:45,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14322 states to 14322 states and 16407 transitions. [2022-11-20 12:31:45,412 INFO L78 Accepts]: Start accepts. Automaton has 14322 states and 16407 transitions. Word has length 117 [2022-11-20 12:31:45,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:31:45,412 INFO L495 AbstractCegarLoop]: Abstraction has 14322 states and 16407 transitions. [2022-11-20 12:31:45,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 6.4423076923076925) internal successors, (335), 52 states have internal predecessors, (335), 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 12:31:45,412 INFO L276 IsEmpty]: Start isEmpty. Operand 14322 states and 16407 transitions. [2022-11-20 12:31:45,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-20 12:31:45,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:31:45,415 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 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 12:31:45,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 12:31:45,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 12:31:45,616 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:31:45,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:31:45,616 INFO L85 PathProgramCache]: Analyzing trace with hash 43675942, now seen corresponding path program 1 times [2022-11-20 12:31:45,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:31:45,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360311270] [2022-11-20 12:31:45,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:31:45,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:31:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:31:47,527 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:31:47,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:31:47,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360311270] [2022-11-20 12:31:47,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360311270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:31:47,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633865934] [2022-11-20 12:31:47,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:31:47,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:31:47,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:31:47,528 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:31:47,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdba2027-c395-4b6a-a602-fabfcff317cf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 12:31:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:31:47,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 12:31:47,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:32:00,885 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:32:00,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:32:11,482 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:32:11,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633865934] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:32:11,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:32:11,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22, 22] total 65 [2022-11-20 12:32:11,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100702548] [2022-11-20 12:32:11,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:32:11,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-20 12:32:11,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:32:11,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-20 12:32:11,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=3836, Unknown=2, NotChecked=0, Total=4160 [2022-11-20 12:32:11,485 INFO L87 Difference]: Start difference. First operand 14322 states and 16407 transitions. Second operand has 65 states, 65 states have (on average 5.153846153846154) internal successors, (335), 65 states have internal predecessors, (335), 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)