./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02350721-be76-4bd5-991f-48d729bcbdcd/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02350721-be76-4bd5-991f-48d729bcbdcd/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_02350721-be76-4bd5-991f-48d729bcbdcd/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02350721-be76-4bd5-991f-48d729bcbdcd/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02350721-be76-4bd5-991f-48d729bcbdcd/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_02350721-be76-4bd5-991f-48d729bcbdcd/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 5cbdd74a230613e4bdaea53735767d2cb8a557f2fb27b4c6d6d20587e28e4a0f --- 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 11:53:05,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:53:05,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:53:05,139 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:53:05,139 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:53:05,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:53:05,142 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:53:05,144 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:53:05,145 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:53:05,146 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:53:05,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:53:05,148 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:53:05,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:53:05,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:53:05,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:53:05,164 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:53:05,165 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:53:05,166 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:53:05,168 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:53:05,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:53:05,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:53:05,173 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:53:05,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:53:05,176 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:53:05,181 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:53:05,181 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:53:05,182 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:53:05,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:53:05,183 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:53:05,185 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:53:05,185 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:53:05,186 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:53:05,187 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:53:05,188 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:53:05,190 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:53:05,190 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:53:05,191 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:53:05,191 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:53:05,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:53:05,194 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:53:05,195 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:53:05,196 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02350721-be76-4bd5-991f-48d729bcbdcd/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:53:05,220 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:53:05,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:53:05,222 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:53:05,223 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:53:05,224 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:53:05,224 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:53:05,225 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:53:05,225 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:53:05,225 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:53:05,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:53:05,227 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:53:05,227 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:53:05,227 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:53:05,228 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:53:05,228 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:53:05,228 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:53:05,228 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:53:05,229 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:53:05,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:53:05,229 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:53:05,229 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:53:05,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:53:05,230 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:53:05,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:53:05,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:53:05,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:53:05,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:53:05,231 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:53:05,231 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:53:05,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:53:05,232 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:53:05,232 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:53:05,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:53:05,233 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_02350721-be76-4bd5-991f-48d729bcbdcd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02350721-be76-4bd5-991f-48d729bcbdcd/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5cbdd74a230613e4bdaea53735767d2cb8a557f2fb27b4c6d6d20587e28e4a0f [2022-11-20 11:53:05,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:53:05,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:53:05,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:53:05,559 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:53:05,560 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:53:05,561 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02350721-be76-4bd5-991f-48d729bcbdcd/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c [2022-11-20 11:53:08,736 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:53:08,989 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:53:08,990 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02350721-be76-4bd5-991f-48d729bcbdcd/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c [2022-11-20 11:53:08,999 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02350721-be76-4bd5-991f-48d729bcbdcd/bin/uautomizer-ug76WZFUDN/data/2d64e84d6/607c261b8cee4029baf2ca1a151167fd/FLAG7ba177be6 [2022-11-20 11:53:09,015 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02350721-be76-4bd5-991f-48d729bcbdcd/bin/uautomizer-ug76WZFUDN/data/2d64e84d6/607c261b8cee4029baf2ca1a151167fd [2022-11-20 11:53:09,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:53:09,023 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:53:09,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:53:09,030 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:53:09,034 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:53:09,035 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:53:09" (1/1) ... [2022-11-20 11:53:09,036 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50c8b412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:53:09, skipping insertion in model container [2022-11-20 11:53:09,036 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:53:09" (1/1) ... [2022-11-20 11:53:09,045 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:53:09,101 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:53:09,348 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_02350721-be76-4bd5-991f-48d729bcbdcd/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c[16977,16990] [2022-11-20 11:53:09,352 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:53:09,364 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:53:09,423 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_02350721-be76-4bd5-991f-48d729bcbdcd/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c[16977,16990] [2022-11-20 11:53:09,424 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:53:09,439 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:53:09,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:53:09 WrapperNode [2022-11-20 11:53:09,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:53:09,441 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:53:09,442 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:53:09,442 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:53:09,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:53:09" (1/1) ... [2022-11-20 11:53:09,461 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:53:09" (1/1) ... [2022-11-20 11:53:09,497 INFO L138 Inliner]: procedures = 25, calls = 17, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 414 [2022-11-20 11:53:09,498 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:53:09,498 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:53:09,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:53:09,499 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:53:09,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:53:09" (1/1) ... [2022-11-20 11:53:09,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:53:09" (1/1) ... [2022-11-20 11:53:09,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:53:09" (1/1) ... [2022-11-20 11:53:09,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:53:09" (1/1) ... [2022-11-20 11:53:09,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:53:09" (1/1) ... [2022-11-20 11:53:09,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:53:09" (1/1) ... [2022-11-20 11:53:09,533 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:53:09" (1/1) ... [2022-11-20 11:53:09,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:53:09" (1/1) ... [2022-11-20 11:53:09,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:53:09,540 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:53:09,540 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:53:09,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:53:09,541 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:53:09" (1/1) ... [2022-11-20 11:53:09,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:53:09,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02350721-be76-4bd5-991f-48d729bcbdcd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:53:09,601 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02350721-be76-4bd5-991f-48d729bcbdcd/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:53:09,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02350721-be76-4bd5-991f-48d729bcbdcd/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:53:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:53:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:53:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:53:09,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:53:09,800 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:53:09,802 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:53:10,487 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:53:10,509 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:53:10,510 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 11:53:10,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:53:10 BoogieIcfgContainer [2022-11-20 11:53:10,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:53:10,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:53:10,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:53:10,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:53:10,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:53:09" (1/3) ... [2022-11-20 11:53:10,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e700aeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:53:10, skipping insertion in model container [2022-11-20 11:53:10,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:53:09" (2/3) ... [2022-11-20 11:53:10,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e700aeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:53:10, skipping insertion in model container [2022-11-20 11:53:10,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:53:10" (3/3) ... [2022-11-20 11:53:10,526 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c [2022-11-20 11:53:10,562 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:53:10,563 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:53:10,625 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:53:10,632 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;@4365166e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:53:10,633 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 11:53:10,640 INFO L276 IsEmpty]: Start isEmpty. Operand has 121 states, 119 states have (on average 1.7647058823529411) internal successors, (210), 120 states have internal predecessors, (210), 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 11:53:10,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 11:53:10,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:10,650 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] [2022-11-20 11:53:10,651 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:10,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:10,660 INFO L85 PathProgramCache]: Analyzing trace with hash 89596463, now seen corresponding path program 1 times [2022-11-20 11:53:10,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:10,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229721973] [2022-11-20 11:53:10,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:10,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:11,102 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 11:53:11,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:11,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229721973] [2022-11-20 11:53:11,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229721973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:53:11,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:53:11,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:53:11,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527029628] [2022-11-20 11:53:11,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:53:11,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:53:11,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:11,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:53:11,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:53:11,162 INFO L87 Difference]: Start difference. First operand has 121 states, 119 states have (on average 1.7647058823529411) internal successors, (210), 120 states have internal predecessors, (210), 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 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 11:53:11,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:11,315 INFO L93 Difference]: Finished difference Result 199 states and 336 transitions. [2022-11-20 11:53:11,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:53:11,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 37 [2022-11-20 11:53:11,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:11,327 INFO L225 Difference]: With dead ends: 199 [2022-11-20 11:53:11,330 INFO L226 Difference]: Without dead ends: 117 [2022-11-20 11:53:11,333 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 11:53:11,337 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 3 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:53:11,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 776 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:53:11,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-20 11:53:11,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-11-20 11:53:11,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.396551724137931) internal successors, (162), 116 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:53:11,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 162 transitions. [2022-11-20 11:53:11,380 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 162 transitions. Word has length 37 [2022-11-20 11:53:11,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:53:11,381 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 162 transitions. [2022-11-20 11:53:11,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 11:53:11,381 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 162 transitions. [2022-11-20 11:53:11,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-20 11:53:11,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:11,384 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:53:11,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:53:11,384 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:11,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:11,385 INFO L85 PathProgramCache]: Analyzing trace with hash 446628089, now seen corresponding path program 1 times [2022-11-20 11:53:11,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:11,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017759585] [2022-11-20 11:53:11,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:11,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:11,579 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 11:53:11,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:11,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017759585] [2022-11-20 11:53:11,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017759585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:53:11,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:53:11,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:53:11,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362767013] [2022-11-20 11:53:11,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:53:11,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:53:11,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:11,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:53:11,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:53:11,583 INFO L87 Difference]: Start difference. First operand 117 states and 162 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 11:53:11,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:11,623 INFO L93 Difference]: Finished difference Result 249 states and 378 transitions. [2022-11-20 11:53:11,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:53:11,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 77 [2022-11-20 11:53:11,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:11,626 INFO L225 Difference]: With dead ends: 249 [2022-11-20 11:53:11,626 INFO L226 Difference]: Without dead ends: 179 [2022-11-20 11:53:11,627 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 11:53:11,628 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 91 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 332 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 11:53:11,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 332 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:53:11,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-11-20 11:53:11,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2022-11-20 11:53:11,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.4829545454545454) internal successors, (261), 176 states have internal predecessors, (261), 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 11:53:11,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 261 transitions. [2022-11-20 11:53:11,649 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 261 transitions. Word has length 77 [2022-11-20 11:53:11,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:53:11,650 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 261 transitions. [2022-11-20 11:53:11,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 11:53:11,651 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 261 transitions. [2022-11-20 11:53:11,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-20 11:53:11,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:11,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:53:11,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:53:11,653 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:11,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:11,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1625058746, now seen corresponding path program 1 times [2022-11-20 11:53:11,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:11,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249234581] [2022-11-20 11:53:11,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:11,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:11,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:12,055 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 11:53:12,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:12,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249234581] [2022-11-20 11:53:12,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249234581] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:53:12,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:53:12,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 11:53:12,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981258921] [2022-11-20 11:53:12,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:53:12,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:53:12,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:12,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:53:12,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:53:12,060 INFO L87 Difference]: Start difference. First operand 177 states and 261 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 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 11:53:12,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:12,377 INFO L93 Difference]: Finished difference Result 1087 states and 1759 transitions. [2022-11-20 11:53:12,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:53:12,379 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 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 77 [2022-11-20 11:53:12,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:12,385 INFO L225 Difference]: With dead ends: 1087 [2022-11-20 11:53:12,385 INFO L226 Difference]: Without dead ends: 957 [2022-11-20 11:53:12,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:53:12,388 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 2030 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2030 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:53:12,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2030 Valid, 1179 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:53:12,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-11-20 11:53:12,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 305. [2022-11-20 11:53:12,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.5460526315789473) internal successors, (470), 304 states have internal predecessors, (470), 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 11:53:12,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 470 transitions. [2022-11-20 11:53:12,477 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 470 transitions. Word has length 77 [2022-11-20 11:53:12,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:53:12,481 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 470 transitions. [2022-11-20 11:53:12,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 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 11:53:12,481 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 470 transitions. [2022-11-20 11:53:12,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-20 11:53:12,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:12,487 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:53:12,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:53:12,488 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:12,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:12,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1546109612, now seen corresponding path program 1 times [2022-11-20 11:53:12,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:12,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814683488] [2022-11-20 11:53:12,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:12,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:12,811 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 11:53:12,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:12,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814683488] [2022-11-20 11:53:12,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814683488] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:53:12,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:53:12,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:53:12,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440229186] [2022-11-20 11:53:12,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:53:12,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:53:12,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:12,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:53:12,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:53:12,820 INFO L87 Difference]: Start difference. First operand 305 states and 470 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 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 11:53:12,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:12,959 INFO L93 Difference]: Finished difference Result 579 states and 909 transitions. [2022-11-20 11:53:12,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:53:12,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 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 78 [2022-11-20 11:53:12,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:12,965 INFO L225 Difference]: With dead ends: 579 [2022-11-20 11:53:12,965 INFO L226 Difference]: Without dead ends: 577 [2022-11-20 11:53:12,967 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 11:53:12,970 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 324 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 740 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 11:53:12,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 740 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:53:12,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-11-20 11:53:13,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 317. [2022-11-20 11:53:13,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 1.5253164556962024) internal successors, (482), 316 states have internal predecessors, (482), 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 11:53:13,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 482 transitions. [2022-11-20 11:53:13,034 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 482 transitions. Word has length 78 [2022-11-20 11:53:13,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:53:13,035 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 482 transitions. [2022-11-20 11:53:13,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 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 11:53:13,035 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 482 transitions. [2022-11-20 11:53:13,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-20 11:53:13,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:13,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:53:13,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:53:13,044 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:13,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:13,045 INFO L85 PathProgramCache]: Analyzing trace with hash -632178990, now seen corresponding path program 1 times [2022-11-20 11:53:13,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:13,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558055278] [2022-11-20 11:53:13,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:13,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:13,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:13,218 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 11:53:13,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:13,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558055278] [2022-11-20 11:53:13,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558055278] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:53:13,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:53:13,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:53:13,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729575665] [2022-11-20 11:53:13,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:53:13,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:53:13,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:13,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:53:13,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:53:13,224 INFO L87 Difference]: Start difference. First operand 317 states and 482 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 11:53:13,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:13,301 INFO L93 Difference]: Finished difference Result 827 states and 1302 transitions. [2022-11-20 11:53:13,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:53:13,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 79 [2022-11-20 11:53:13,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:13,306 INFO L225 Difference]: With dead ends: 827 [2022-11-20 11:53:13,306 INFO L226 Difference]: Without dead ends: 557 [2022-11-20 11:53:13,310 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 11:53:13,312 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 76 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:53:13,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 274 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:53:13,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-11-20 11:53:13,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 555. [2022-11-20 11:53:13,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 1.555956678700361) internal successors, (862), 554 states have internal predecessors, (862), 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 11:53:13,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 862 transitions. [2022-11-20 11:53:13,377 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 862 transitions. Word has length 79 [2022-11-20 11:53:13,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:53:13,379 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 862 transitions. [2022-11-20 11:53:13,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 11:53:13,382 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 862 transitions. [2022-11-20 11:53:13,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-20 11:53:13,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:13,385 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:53:13,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:53:13,385 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:13,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:13,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1939222481, now seen corresponding path program 1 times [2022-11-20 11:53:13,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:13,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966891385] [2022-11-20 11:53:13,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:13,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:13,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:13,505 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 11:53:13,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:13,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966891385] [2022-11-20 11:53:13,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966891385] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:53:13,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:53:13,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:53:13,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824722632] [2022-11-20 11:53:13,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:53:13,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:53:13,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:13,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:53:13,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:53:13,509 INFO L87 Difference]: Start difference. First operand 555 states and 862 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 11:53:13,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:13,595 INFO L93 Difference]: Finished difference Result 1065 states and 1679 transitions. [2022-11-20 11:53:13,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:53:13,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 79 [2022-11-20 11:53:13,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:13,600 INFO L225 Difference]: With dead ends: 1065 [2022-11-20 11:53:13,600 INFO L226 Difference]: Without dead ends: 795 [2022-11-20 11:53:13,601 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 11:53:13,603 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 103 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 368 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 11:53:13,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 368 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:53:13,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-11-20 11:53:13,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 793. [2022-11-20 11:53:13,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 1.5631313131313131) internal successors, (1238), 792 states have internal predecessors, (1238), 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 11:53:13,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1238 transitions. [2022-11-20 11:53:13,715 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1238 transitions. Word has length 79 [2022-11-20 11:53:13,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:53:13,715 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 1238 transitions. [2022-11-20 11:53:13,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 11:53:13,715 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1238 transitions. [2022-11-20 11:53:13,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-20 11:53:13,722 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:13,723 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:53:13,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:53:13,723 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:13,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:13,724 INFO L85 PathProgramCache]: Analyzing trace with hash 843177357, now seen corresponding path program 1 times [2022-11-20 11:53:13,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:13,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947164740] [2022-11-20 11:53:13,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:13,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:13,822 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 11:53:13,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:13,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947164740] [2022-11-20 11:53:13,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947164740] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:53:13,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:53:13,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:53:13,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532756583] [2022-11-20 11:53:13,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:53:13,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:53:13,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:13,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:53:13,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:53:13,826 INFO L87 Difference]: Start difference. First operand 793 states and 1238 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 11:53:13,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:13,989 INFO L93 Difference]: Finished difference Result 2185 states and 3448 transitions. [2022-11-20 11:53:13,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:53:13,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 80 [2022-11-20 11:53:13,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:13,995 INFO L225 Difference]: With dead ends: 2185 [2022-11-20 11:53:13,995 INFO L226 Difference]: Without dead ends: 1441 [2022-11-20 11:53:13,997 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 11:53:14,000 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 83 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 326 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 11:53:14,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 326 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:53:14,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2022-11-20 11:53:14,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 1439. [2022-11-20 11:53:14,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 1.5618915159944367) internal successors, (2246), 1438 states have internal predecessors, (2246), 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 11:53:14,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 2246 transitions. [2022-11-20 11:53:14,174 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 2246 transitions. Word has length 80 [2022-11-20 11:53:14,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:53:14,174 INFO L495 AbstractCegarLoop]: Abstraction has 1439 states and 2246 transitions. [2022-11-20 11:53:14,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 11:53:14,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 2246 transitions. [2022-11-20 11:53:14,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-20 11:53:14,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:14,176 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:53:14,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 11:53:14,176 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:14,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:14,177 INFO L85 PathProgramCache]: Analyzing trace with hash -957511571, now seen corresponding path program 1 times [2022-11-20 11:53:14,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:14,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228670509] [2022-11-20 11:53:14,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:14,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:14,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:14,276 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 11:53:14,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:14,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228670509] [2022-11-20 11:53:14,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228670509] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:53:14,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:53:14,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:53:14,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057706693] [2022-11-20 11:53:14,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:53:14,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:53:14,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:14,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:53:14,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:53:14,279 INFO L87 Difference]: Start difference. First operand 1439 states and 2246 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 11:53:14,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:14,561 INFO L93 Difference]: Finished difference Result 4027 states and 6304 transitions. [2022-11-20 11:53:14,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:53:14,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 80 [2022-11-20 11:53:14,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:14,572 INFO L225 Difference]: With dead ends: 4027 [2022-11-20 11:53:14,572 INFO L226 Difference]: Without dead ends: 2637 [2022-11-20 11:53:14,575 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 11:53:14,576 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 87 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 339 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 11:53:14,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 339 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:53:14,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2022-11-20 11:53:14,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 2635. [2022-11-20 11:53:14,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 2634 states have (on average 1.5497342444950646) internal successors, (4082), 2634 states have internal predecessors, (4082), 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 11:53:14,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 4082 transitions. [2022-11-20 11:53:14,878 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 4082 transitions. Word has length 80 [2022-11-20 11:53:14,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:53:14,879 INFO L495 AbstractCegarLoop]: Abstraction has 2635 states and 4082 transitions. [2022-11-20 11:53:14,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 11:53:14,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 4082 transitions. [2022-11-20 11:53:14,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-20 11:53:14,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:14,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:53:14,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 11:53:14,881 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:14,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:14,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1565232685, now seen corresponding path program 1 times [2022-11-20 11:53:14,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:14,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490809215] [2022-11-20 11:53:14,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:14,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:14,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:14,947 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 11:53:14,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:14,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490809215] [2022-11-20 11:53:14,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490809215] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:53:14,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:53:14,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:53:14,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846676567] [2022-11-20 11:53:14,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:53:14,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:53:14,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:14,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:53:14,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:53:14,949 INFO L87 Difference]: Start difference. First operand 2635 states and 4082 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 11:53:15,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:15,509 INFO L93 Difference]: Finished difference Result 7423 states and 11476 transitions. [2022-11-20 11:53:15,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:53:15,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 80 [2022-11-20 11:53:15,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:15,526 INFO L225 Difference]: With dead ends: 7423 [2022-11-20 11:53:15,526 INFO L226 Difference]: Without dead ends: 4837 [2022-11-20 11:53:15,528 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 11:53:15,529 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 95 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 355 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 11:53:15,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 355 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:53:15,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4837 states. [2022-11-20 11:53:16,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4837 to 4835. [2022-11-20 11:53:16,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4835 states, 4834 states have (on average 1.5295821266032272) internal successors, (7394), 4834 states have internal predecessors, (7394), 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 11:53:16,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4835 states to 4835 states and 7394 transitions. [2022-11-20 11:53:16,037 INFO L78 Accepts]: Start accepts. Automaton has 4835 states and 7394 transitions. Word has length 80 [2022-11-20 11:53:16,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:53:16,037 INFO L495 AbstractCegarLoop]: Abstraction has 4835 states and 7394 transitions. [2022-11-20 11:53:16,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 11:53:16,038 INFO L276 IsEmpty]: Start isEmpty. Operand 4835 states and 7394 transitions. [2022-11-20 11:53:16,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-20 11:53:16,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:16,039 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:53:16,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 11:53:16,039 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:16,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:16,040 INFO L85 PathProgramCache]: Analyzing trace with hash -26351347, now seen corresponding path program 1 times [2022-11-20 11:53:16,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:16,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430459915] [2022-11-20 11:53:16,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:16,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:16,113 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 11:53:16,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:16,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430459915] [2022-11-20 11:53:16,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430459915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:53:16,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:53:16,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:53:16,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048479373] [2022-11-20 11:53:16,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:53:16,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:53:16,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:16,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:53:16,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:53:16,115 INFO L87 Difference]: Start difference. First operand 4835 states and 7394 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 11:53:17,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:17,067 INFO L93 Difference]: Finished difference Result 13639 states and 20740 transitions. [2022-11-20 11:53:17,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:53:17,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 80 [2022-11-20 11:53:17,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:17,096 INFO L225 Difference]: With dead ends: 13639 [2022-11-20 11:53:17,097 INFO L226 Difference]: Without dead ends: 8853 [2022-11-20 11:53:17,103 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 11:53:17,103 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 99 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 368 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 11:53:17,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 368 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:53:17,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8853 states. [2022-11-20 11:53:17,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8853 to 8851. [2022-11-20 11:53:18,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8851 states, 8850 states have (on average 1.5025988700564972) internal successors, (13298), 8850 states have internal predecessors, (13298), 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 11:53:18,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8851 states to 8851 states and 13298 transitions. [2022-11-20 11:53:18,032 INFO L78 Accepts]: Start accepts. Automaton has 8851 states and 13298 transitions. Word has length 80 [2022-11-20 11:53:18,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:53:18,033 INFO L495 AbstractCegarLoop]: Abstraction has 8851 states and 13298 transitions. [2022-11-20 11:53:18,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 11:53:18,033 INFO L276 IsEmpty]: Start isEmpty. Operand 8851 states and 13298 transitions. [2022-11-20 11:53:18,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-20 11:53:18,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:18,039 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:53:18,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 11:53:18,039 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:18,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:18,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1785241918, now seen corresponding path program 1 times [2022-11-20 11:53:18,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:18,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833326512] [2022-11-20 11:53:18,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:18,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:18,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:18,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833326512] [2022-11-20 11:53:18,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833326512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:53:18,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:53:18,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:53:18,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576840154] [2022-11-20 11:53:18,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:53:18,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:53:18,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:18,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:53:18,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:53:18,217 INFO L87 Difference]: Start difference. First operand 8851 states and 13298 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 11:53:19,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:19,245 INFO L93 Difference]: Finished difference Result 17655 states and 26548 transitions. [2022-11-20 11:53:19,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:53:19,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 110 [2022-11-20 11:53:19,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:19,336 INFO L225 Difference]: With dead ends: 17655 [2022-11-20 11:53:19,336 INFO L226 Difference]: Without dead ends: 8853 [2022-11-20 11:53:19,345 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 11:53:19,346 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 80 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 362 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 11:53:19,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 362 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:53:19,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8853 states. [2022-11-20 11:53:20,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8853 to 8851. [2022-11-20 11:53:20,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8851 states, 8850 states have (on average 1.4917514124293785) internal successors, (13202), 8850 states have internal predecessors, (13202), 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 11:53:20,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8851 states to 8851 states and 13202 transitions. [2022-11-20 11:53:20,213 INFO L78 Accepts]: Start accepts. Automaton has 8851 states and 13202 transitions. Word has length 110 [2022-11-20 11:53:20,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:53:20,213 INFO L495 AbstractCegarLoop]: Abstraction has 8851 states and 13202 transitions. [2022-11-20 11:53:20,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 11:53:20,214 INFO L276 IsEmpty]: Start isEmpty. Operand 8851 states and 13202 transitions. [2022-11-20 11:53:20,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-20 11:53:20,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:20,218 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:53:20,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 11:53:20,218 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:20,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:20,220 INFO L85 PathProgramCache]: Analyzing trace with hash 2076585793, now seen corresponding path program 1 times [2022-11-20 11:53:20,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:20,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56054357] [2022-11-20 11:53:20,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:20,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:20,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:20,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:20,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56054357] [2022-11-20 11:53:20,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56054357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:53:20,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:53:20,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:53:20,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613953153] [2022-11-20 11:53:20,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:53:20,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:53:20,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:20,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:53:20,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:53:20,394 INFO L87 Difference]: Start difference. First operand 8851 states and 13202 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 11:53:20,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:20,829 INFO L93 Difference]: Finished difference Result 13255 states and 19780 transitions. [2022-11-20 11:53:20,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:53:20,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 110 [2022-11-20 11:53:20,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:20,841 INFO L225 Difference]: With dead ends: 13255 [2022-11-20 11:53:20,841 INFO L226 Difference]: Without dead ends: 4453 [2022-11-20 11:53:20,849 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 11:53:20,850 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 74 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 343 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 11:53:20,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 343 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:53:20,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4453 states. [2022-11-20 11:53:21,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4453 to 4451. [2022-11-20 11:53:21,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4451 states, 4450 states have (on average 1.4782022471910112) internal successors, (6578), 4450 states have internal predecessors, (6578), 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 11:53:21,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4451 states to 4451 states and 6578 transitions. [2022-11-20 11:53:21,200 INFO L78 Accepts]: Start accepts. Automaton has 4451 states and 6578 transitions. Word has length 110 [2022-11-20 11:53:21,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:53:21,200 INFO L495 AbstractCegarLoop]: Abstraction has 4451 states and 6578 transitions. [2022-11-20 11:53:21,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 11:53:21,200 INFO L276 IsEmpty]: Start isEmpty. Operand 4451 states and 6578 transitions. [2022-11-20 11:53:21,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-20 11:53:21,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:21,203 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:53:21,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 11:53:21,203 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:21,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:21,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1799940288, now seen corresponding path program 1 times [2022-11-20 11:53:21,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:21,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538487995] [2022-11-20 11:53:21,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:21,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:21,338 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:21,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:21,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538487995] [2022-11-20 11:53:21,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538487995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:53:21,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:53:21,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:53:21,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91238267] [2022-11-20 11:53:21,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:53:21,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:53:21,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:21,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:53:21,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:53:21,341 INFO L87 Difference]: Start difference. First operand 4451 states and 6578 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 11:53:21,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:21,596 INFO L93 Difference]: Finished difference Result 6655 states and 9844 transitions. [2022-11-20 11:53:21,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:53:21,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 110 [2022-11-20 11:53:21,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:21,601 INFO L225 Difference]: With dead ends: 6655 [2022-11-20 11:53:21,602 INFO L226 Difference]: Without dead ends: 2253 [2022-11-20 11:53:21,606 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 11:53:21,607 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 68 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 321 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 11:53:21,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 321 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:53:21,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2022-11-20 11:53:21,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 2251. [2022-11-20 11:53:21,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2251 states, 2250 states have (on average 1.4622222222222223) internal successors, (3290), 2250 states have internal predecessors, (3290), 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 11:53:21,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2251 states to 2251 states and 3290 transitions. [2022-11-20 11:53:21,882 INFO L78 Accepts]: Start accepts. Automaton has 2251 states and 3290 transitions. Word has length 110 [2022-11-20 11:53:21,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:53:21,883 INFO L495 AbstractCegarLoop]: Abstraction has 2251 states and 3290 transitions. [2022-11-20 11:53:21,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 11:53:21,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2251 states and 3290 transitions. [2022-11-20 11:53:21,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-20 11:53:21,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:21,885 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:53:21,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 11:53:21,886 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:21,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:21,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1010003519, now seen corresponding path program 1 times [2022-11-20 11:53:21,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:21,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140369502] [2022-11-20 11:53:21,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:21,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:21,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:22,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:22,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140369502] [2022-11-20 11:53:22,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140369502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:53:22,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:53:22,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:53:22,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790860160] [2022-11-20 11:53:22,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:53:22,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:53:22,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:22,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:53:22,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:53:22,053 INFO L87 Difference]: Start difference. First operand 2251 states and 3290 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 11:53:22,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:22,209 INFO L93 Difference]: Finished difference Result 3355 states and 4912 transitions. [2022-11-20 11:53:22,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:53:22,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 110 [2022-11-20 11:53:22,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:22,213 INFO L225 Difference]: With dead ends: 3355 [2022-11-20 11:53:22,214 INFO L226 Difference]: Without dead ends: 1153 [2022-11-20 11:53:22,216 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 11:53:22,217 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 62 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 302 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 11:53:22,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 302 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:53:22,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2022-11-20 11:53:22,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1151. [2022-11-20 11:53:22,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 1150 states have (on average 1.4417391304347826) internal successors, (1658), 1150 states have internal predecessors, (1658), 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 11:53:22,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1658 transitions. [2022-11-20 11:53:22,361 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1658 transitions. Word has length 110 [2022-11-20 11:53:22,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:53:22,362 INFO L495 AbstractCegarLoop]: Abstraction has 1151 states and 1658 transitions. [2022-11-20 11:53:22,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 11:53:22,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1658 transitions. [2022-11-20 11:53:22,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-20 11:53:22,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:22,364 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:22,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 11:53:22,365 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:22,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:22,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1396251838, now seen corresponding path program 1 times [2022-11-20 11:53:22,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:22,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042657327] [2022-11-20 11:53:22,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:22,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:22,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:23,839 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:23,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:23,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042657327] [2022-11-20 11:53:23,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042657327] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:53:23,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766473873] [2022-11-20 11:53:23,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:23,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:53:23,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02350721-be76-4bd5-991f-48d729bcbdcd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:53:23,847 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02350721-be76-4bd5-991f-48d729bcbdcd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:53:23,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02350721-be76-4bd5-991f-48d729bcbdcd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:53:24,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:24,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 11:53:24,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:53:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:53:24,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:53:24,848 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:53:24,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766473873] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:53:24,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:53:24,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 4] total 19 [2022-11-20 11:53:24,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449855467] [2022-11-20 11:53:24,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:53:24,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:53:24,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:24,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:53:24,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:53:24,851 INFO L87 Difference]: Start difference. First operand 1151 states and 1658 transitions. Second operand has 19 states, 19 states have (on average 16.63157894736842) internal successors, (316), 19 states have internal predecessors, (316), 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 11:53:33,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:33,668 INFO L93 Difference]: Finished difference Result 12580 states and 18061 transitions. [2022-11-20 11:53:33,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-11-20 11:53:33,668 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 16.63157894736842) internal successors, (316), 19 states have internal predecessors, (316), 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 110 [2022-11-20 11:53:33,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:33,692 INFO L225 Difference]: With dead ends: 12580 [2022-11-20 11:53:33,692 INFO L226 Difference]: Without dead ends: 11826 [2022-11-20 11:53:33,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4289 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1828, Invalid=9514, Unknown=0, NotChecked=0, Total=11342 [2022-11-20 11:53:33,699 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 7266 mSDsluCounter, 2568 mSDsCounter, 0 mSdLazyCounter, 2199 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7266 SdHoareTripleChecker+Valid, 2840 SdHoareTripleChecker+Invalid, 2275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:53:33,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7266 Valid, 2840 Invalid, 2275 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [76 Valid, 2199 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-20 11:53:33,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11826 states. [2022-11-20 11:53:34,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11826 to 5767. [2022-11-20 11:53:34,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5767 states, 5766 states have (on average 1.4419007977800902) internal successors, (8314), 5766 states have internal predecessors, (8314), 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 11:53:34,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5767 states to 5767 states and 8314 transitions. [2022-11-20 11:53:34,478 INFO L78 Accepts]: Start accepts. Automaton has 5767 states and 8314 transitions. Word has length 110 [2022-11-20 11:53:34,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:53:34,478 INFO L495 AbstractCegarLoop]: Abstraction has 5767 states and 8314 transitions. [2022-11-20 11:53:34,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 16.63157894736842) internal successors, (316), 19 states have internal predecessors, (316), 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 11:53:34,479 INFO L276 IsEmpty]: Start isEmpty. Operand 5767 states and 8314 transitions. [2022-11-20 11:53:34,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-20 11:53:34,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:34,481 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:34,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02350721-be76-4bd5-991f-48d729bcbdcd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:53:34,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02350721-be76-4bd5-991f-48d729bcbdcd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 11:53:34,688 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:34,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:34,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1668141927, now seen corresponding path program 1 times [2022-11-20 11:53:34,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:34,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747590705] [2022-11-20 11:53:34,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:34,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:34,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:34,943 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 11:53:34,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:34,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747590705] [2022-11-20 11:53:34,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747590705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:53:34,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:53:34,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 11:53:34,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134361414] [2022-11-20 11:53:34,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:53:34,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:53:34,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:34,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:53:34,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:53:34,946 INFO L87 Difference]: Start difference. First operand 5767 states and 8314 transitions. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 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 11:53:37,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:37,118 INFO L93 Difference]: Finished difference Result 22875 states and 33166 transitions. [2022-11-20 11:53:37,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:53:37,118 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 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 111 [2022-11-20 11:53:37,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:37,152 INFO L225 Difference]: With dead ends: 22875 [2022-11-20 11:53:37,153 INFO L226 Difference]: Without dead ends: 19919 [2022-11-20 11:53:37,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:53:37,159 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 1251 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:53:37,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1251 Valid, 1460 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:53:37,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19919 states. [2022-11-20 11:53:38,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19919 to 8583. [2022-11-20 11:53:38,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8583 states, 8582 states have (on average 1.4399906781635983) internal successors, (12358), 8582 states have internal predecessors, (12358), 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 11:53:38,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8583 states to 8583 states and 12358 transitions. [2022-11-20 11:53:38,115 INFO L78 Accepts]: Start accepts. Automaton has 8583 states and 12358 transitions. Word has length 111 [2022-11-20 11:53:38,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:53:38,115 INFO L495 AbstractCegarLoop]: Abstraction has 8583 states and 12358 transitions. [2022-11-20 11:53:38,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 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 11:53:38,116 INFO L276 IsEmpty]: Start isEmpty. Operand 8583 states and 12358 transitions. [2022-11-20 11:53:38,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-20 11:53:38,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:38,119 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:38,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 11:53:38,120 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:38,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:38,120 INFO L85 PathProgramCache]: Analyzing trace with hash 12117595, now seen corresponding path program 1 times [2022-11-20 11:53:38,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:38,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050055577] [2022-11-20 11:53:38,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:38,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:38,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:38,390 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 11:53:38,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:38,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050055577] [2022-11-20 11:53:38,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050055577] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:53:38,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:53:38,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 11:53:38,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359789014] [2022-11-20 11:53:38,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:53:38,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:53:38,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:38,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:53:38,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:53:38,393 INFO L87 Difference]: Start difference. First operand 8583 states and 12358 transitions. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 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 11:53:40,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:40,594 INFO L93 Difference]: Finished difference Result 25691 states and 37210 transitions. [2022-11-20 11:53:40,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:53:40,594 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 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 111 [2022-11-20 11:53:40,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:40,634 INFO L225 Difference]: With dead ends: 25691 [2022-11-20 11:53:40,635 INFO L226 Difference]: Without dead ends: 22735 [2022-11-20 11:53:40,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:53:40,642 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 1335 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1335 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:53:40,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1335 Valid, 1314 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:53:40,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22735 states. [2022-11-20 11:53:42,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22735 to 11399. [2022-11-20 11:53:42,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11399 states, 11398 states have (on average 1.4390243902439024) internal successors, (16402), 11398 states have internal predecessors, (16402), 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 11:53:42,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11399 states to 11399 states and 16402 transitions. [2022-11-20 11:53:42,163 INFO L78 Accepts]: Start accepts. Automaton has 11399 states and 16402 transitions. Word has length 111 [2022-11-20 11:53:42,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:53:42,163 INFO L495 AbstractCegarLoop]: Abstraction has 11399 states and 16402 transitions. [2022-11-20 11:53:42,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 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 11:53:42,164 INFO L276 IsEmpty]: Start isEmpty. Operand 11399 states and 16402 transitions. [2022-11-20 11:53:42,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-20 11:53:42,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:42,166 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:42,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 11:53:42,166 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:42,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:42,167 INFO L85 PathProgramCache]: Analyzing trace with hash -13184739, now seen corresponding path program 1 times [2022-11-20 11:53:42,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:42,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082154059] [2022-11-20 11:53:42,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:42,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 11:53:42,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:42,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082154059] [2022-11-20 11:53:42,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082154059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:53:42,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:53:42,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 11:53:42,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471684099] [2022-11-20 11:53:42,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:53:42,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:53:42,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:42,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:53:42,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:53:42,362 INFO L87 Difference]: Start difference. First operand 11399 states and 16402 transitions. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 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 11:53:45,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:45,366 INFO L93 Difference]: Finished difference Result 28507 states and 41254 transitions. [2022-11-20 11:53:45,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:53:45,366 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 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 111 [2022-11-20 11:53:45,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:45,398 INFO L225 Difference]: With dead ends: 28507 [2022-11-20 11:53:45,398 INFO L226 Difference]: Without dead ends: 25551 [2022-11-20 11:53:45,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:53:45,405 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 1426 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1426 SdHoareTripleChecker+Valid, 1347 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:53:45,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1426 Valid, 1347 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:53:45,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25551 states. [2022-11-20 11:53:47,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25551 to 14215. [2022-11-20 11:53:47,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14215 states, 14214 states have (on average 1.4384409736879133) internal successors, (20446), 14214 states have internal predecessors, (20446), 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 11:53:47,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14215 states to 14215 states and 20446 transitions. [2022-11-20 11:53:47,322 INFO L78 Accepts]: Start accepts. Automaton has 14215 states and 20446 transitions. Word has length 111 [2022-11-20 11:53:47,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:53:47,322 INFO L495 AbstractCegarLoop]: Abstraction has 14215 states and 20446 transitions. [2022-11-20 11:53:47,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 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 11:53:47,323 INFO L276 IsEmpty]: Start isEmpty. Operand 14215 states and 20446 transitions. [2022-11-20 11:53:47,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-20 11:53:47,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:47,326 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:47,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 11:53:47,326 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:47,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:47,327 INFO L85 PathProgramCache]: Analyzing trace with hash 2102160607, now seen corresponding path program 1 times [2022-11-20 11:53:47,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:47,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888036619] [2022-11-20 11:53:47,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:47,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:47,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 11:53:47,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:47,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888036619] [2022-11-20 11:53:47,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888036619] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:53:47,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:53:47,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 11:53:47,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030598580] [2022-11-20 11:53:47,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:53:47,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:53:47,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:47,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:53:47,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:53:47,519 INFO L87 Difference]: Start difference. First operand 14215 states and 20446 transitions. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 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 11:53:50,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:50,458 INFO L93 Difference]: Finished difference Result 31323 states and 45298 transitions. [2022-11-20 11:53:50,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:53:50,459 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 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 111 [2022-11-20 11:53:50,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:50,492 INFO L225 Difference]: With dead ends: 31323 [2022-11-20 11:53:50,492 INFO L226 Difference]: Without dead ends: 28367 [2022-11-20 11:53:50,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:53:50,501 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 1229 mSDsluCounter, 1292 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1229 SdHoareTripleChecker+Valid, 1573 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:53:50,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1229 Valid, 1573 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:53:50,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28367 states. [2022-11-20 11:53:52,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28367 to 17031. [2022-11-20 11:53:52,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17031 states, 17030 states have (on average 1.4380504991192014) internal successors, (24490), 17030 states have internal predecessors, (24490), 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 11:53:52,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17031 states to 17031 states and 24490 transitions. [2022-11-20 11:53:52,606 INFO L78 Accepts]: Start accepts. Automaton has 17031 states and 24490 transitions. Word has length 111 [2022-11-20 11:53:52,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:53:52,606 INFO L495 AbstractCegarLoop]: Abstraction has 17031 states and 24490 transitions. [2022-11-20 11:53:52,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 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 11:53:52,607 INFO L276 IsEmpty]: Start isEmpty. Operand 17031 states and 24490 transitions. [2022-11-20 11:53:52,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-20 11:53:52,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:52,611 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:52,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-20 11:53:52,611 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:52,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:52,612 INFO L85 PathProgramCache]: Analyzing trace with hash -2117983273, now seen corresponding path program 1 times [2022-11-20 11:53:52,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:52,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329604978] [2022-11-20 11:53:52,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:52,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:52,802 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:53:52,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:52,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329604978] [2022-11-20 11:53:52,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329604978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:53:52,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:53:52,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 11:53:52,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366213930] [2022-11-20 11:53:52,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:53:52,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:53:52,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:52,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:53:52,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:53:52,804 INFO L87 Difference]: Start difference. First operand 17031 states and 24490 transitions. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 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 11:53:57,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:57,860 INFO L93 Difference]: Finished difference Result 34139 states and 49342 transitions. [2022-11-20 11:53:57,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:53:57,861 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 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 111 [2022-11-20 11:53:57,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:57,893 INFO L225 Difference]: With dead ends: 34139 [2022-11-20 11:53:57,893 INFO L226 Difference]: Without dead ends: 31183 [2022-11-20 11:53:57,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:53:57,903 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 1169 mSDsluCounter, 1587 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1169 SdHoareTripleChecker+Valid, 1870 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:53:57,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1169 Valid, 1870 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:53:57,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31183 states. [2022-11-20 11:54:00,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31183 to 19847. [2022-11-20 11:54:00,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19847 states, 19846 states have (on average 1.437770835432833) internal successors, (28534), 19846 states have internal predecessors, (28534), 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 11:54:00,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19847 states to 19847 states and 28534 transitions. [2022-11-20 11:54:00,817 INFO L78 Accepts]: Start accepts. Automaton has 19847 states and 28534 transitions. Word has length 111 [2022-11-20 11:54:00,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:54:00,817 INFO L495 AbstractCegarLoop]: Abstraction has 19847 states and 28534 transitions. [2022-11-20 11:54:00,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 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 11:54:00,817 INFO L276 IsEmpty]: Start isEmpty. Operand 19847 states and 28534 transitions. [2022-11-20 11:54:00,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-20 11:54:00,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:54:00,821 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:54:00,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-20 11:54:00,821 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:54:00,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:54:00,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1657991926, now seen corresponding path program 1 times [2022-11-20 11:54:00,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:54:00,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920740787] [2022-11-20 11:54:00,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:00,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:54:00,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:54:01,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:54:01,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920740787] [2022-11-20 11:54:01,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920740787] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:54:01,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:54:01,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 11:54:01,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524744522] [2022-11-20 11:54:01,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:54:01,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:54:01,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:54:01,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:54:01,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:54:01,009 INFO L87 Difference]: Start difference. First operand 19847 states and 28534 transitions. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 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 11:54:06,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:54:06,456 INFO L93 Difference]: Finished difference Result 35705 states and 51552 transitions. [2022-11-20 11:54:06,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:54:06,457 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 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 111 [2022-11-20 11:54:06,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:54:06,494 INFO L225 Difference]: With dead ends: 35705 [2022-11-20 11:54:06,494 INFO L226 Difference]: Without dead ends: 33537 [2022-11-20 11:54:06,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:54:06,503 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 1165 mSDsluCounter, 1395 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1165 SdHoareTripleChecker+Valid, 1672 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:54:06,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1165 Valid, 1672 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:54:06,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33537 states. [2022-11-20 11:54:09,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33537 to 22201. [2022-11-20 11:54:09,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22201 states, 22200 states have (on average 1.4371621621621622) internal successors, (31905), 22200 states have internal predecessors, (31905), 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 11:54:09,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22201 states to 22201 states and 31905 transitions. [2022-11-20 11:54:09,951 INFO L78 Accepts]: Start accepts. Automaton has 22201 states and 31905 transitions. Word has length 111 [2022-11-20 11:54:09,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:54:09,952 INFO L495 AbstractCegarLoop]: Abstraction has 22201 states and 31905 transitions. [2022-11-20 11:54:09,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 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 11:54:09,952 INFO L276 IsEmpty]: Start isEmpty. Operand 22201 states and 31905 transitions. [2022-11-20 11:54:09,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-20 11:54:09,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:54:09,955 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:54:09,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-20 11:54:09,956 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:54:09,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:54:09,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1861031529, now seen corresponding path program 1 times [2022-11-20 11:54:09,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:54:09,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495428943] [2022-11-20 11:54:09,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:09,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:54:09,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:10,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:54:10,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495428943] [2022-11-20 11:54:10,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495428943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:54:10,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:54:10,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:54:10,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333185337] [2022-11-20 11:54:10,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:54:10,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:54:10,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:54:10,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:54:10,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:54:10,058 INFO L87 Difference]: Start difference. First operand 22201 states and 31905 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 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 11:54:11,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:54:11,528 INFO L93 Difference]: Finished difference Result 31943 states and 45713 transitions. [2022-11-20 11:54:11,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:54:11,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 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) Word has length 114 [2022-11-20 11:54:11,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:54:11,539 INFO L225 Difference]: With dead ends: 31943 [2022-11-20 11:54:11,539 INFO L226 Difference]: Without dead ends: 9791 [2022-11-20 11:54:11,556 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 11:54:11,557 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 40 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 301 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 11:54:11,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 301 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:54:11,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9791 states. [2022-11-20 11:54:13,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9791 to 9501. [2022-11-20 11:54:13,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9501 states, 9500 states have (on average 1.412421052631579) internal successors, (13418), 9500 states have internal predecessors, (13418), 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 11:54:13,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9501 states to 9501 states and 13418 transitions. [2022-11-20 11:54:13,203 INFO L78 Accepts]: Start accepts. Automaton has 9501 states and 13418 transitions. Word has length 114 [2022-11-20 11:54:13,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:54:13,204 INFO L495 AbstractCegarLoop]: Abstraction has 9501 states and 13418 transitions. [2022-11-20 11:54:13,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 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 11:54:13,204 INFO L276 IsEmpty]: Start isEmpty. Operand 9501 states and 13418 transitions. [2022-11-20 11:54:13,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-20 11:54:13,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:54:13,206 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:54:13,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-20 11:54:13,206 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:54:13,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:54:13,207 INFO L85 PathProgramCache]: Analyzing trace with hash -156099286, now seen corresponding path program 1 times [2022-11-20 11:54:13,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:54:13,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991192693] [2022-11-20 11:54:13,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:13,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:54:13,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:14,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:54:14,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991192693] [2022-11-20 11:54:14,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991192693] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:54:14,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161902861] [2022-11-20 11:54:14,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:14,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:54:14,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02350721-be76-4bd5-991f-48d729bcbdcd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:54:14,031 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02350721-be76-4bd5-991f-48d729bcbdcd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:54:14,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02350721-be76-4bd5-991f-48d729bcbdcd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:54:14,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:14,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:54:14,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:54:15,312 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:15,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:54:16,837 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:16,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161902861] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:54:16,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:54:16,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2022-11-20 11:54:16,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36358159] [2022-11-20 11:54:16,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:54:16,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 11:54:16,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:54:16,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 11:54:16,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-11-20 11:54:16,843 INFO L87 Difference]: Start difference. First operand 9501 states and 13418 transitions. Second operand has 26 states, 26 states have (on average 11.884615384615385) internal successors, (309), 25 states have internal predecessors, (309), 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 11:54:26,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:54:26,243 INFO L93 Difference]: Finished difference Result 54125 states and 75303 transitions. [2022-11-20 11:54:26,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:54:26,244 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 11.884615384615385) internal successors, (309), 25 states have internal predecessors, (309), 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 114 [2022-11-20 11:54:26,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:54:26,285 INFO L225 Difference]: With dead ends: 54125 [2022-11-20 11:54:26,285 INFO L226 Difference]: Without dead ends: 45647 [2022-11-20 11:54:26,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=464, Invalid=1428, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 11:54:26,296 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 2230 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2230 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:54:26,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2230 Valid, 1299 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 11:54:26,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45647 states. [2022-11-20 11:54:30,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45647 to 23690. [2022-11-20 11:54:30,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23690 states, 23689 states have (on average 1.4002279539026552) internal successors, (33170), 23689 states have internal predecessors, (33170), 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 11:54:30,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23690 states to 23690 states and 33170 transitions. [2022-11-20 11:54:30,418 INFO L78 Accepts]: Start accepts. Automaton has 23690 states and 33170 transitions. Word has length 114 [2022-11-20 11:54:30,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:54:30,418 INFO L495 AbstractCegarLoop]: Abstraction has 23690 states and 33170 transitions. [2022-11-20 11:54:30,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 11.884615384615385) internal successors, (309), 25 states have internal predecessors, (309), 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 11:54:30,419 INFO L276 IsEmpty]: Start isEmpty. Operand 23690 states and 33170 transitions. [2022-11-20 11:54:30,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-20 11:54:30,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:54:30,422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:54:30,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02350721-be76-4bd5-991f-48d729bcbdcd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:54:30,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02350721-be76-4bd5-991f-48d729bcbdcd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-20 11:54:30,628 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:54:30,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:54:30,629 INFO L85 PathProgramCache]: Analyzing trace with hash -680764048, now seen corresponding path program 1 times [2022-11-20 11:54:30,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:54:30,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190171084] [2022-11-20 11:54:30,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:30,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:54:30,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:31,169 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:31,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:54:31,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190171084] [2022-11-20 11:54:31,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190171084] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:54:31,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746438888] [2022-11-20 11:54:31,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:31,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:54:31,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02350721-be76-4bd5-991f-48d729bcbdcd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:54:31,171 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02350721-be76-4bd5-991f-48d729bcbdcd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:54:31,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02350721-be76-4bd5-991f-48d729bcbdcd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:54:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:31,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 11:54:31,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:54:33,461 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:33,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:54:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:42,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746438888] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:54:42,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:54:42,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 20] total 41 [2022-11-20 11:54:42,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189531029] [2022-11-20 11:54:42,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:54:42,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-20 11:54:42,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:54:42,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-20 11:54:42,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1388, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 11:54:42,347 INFO L87 Difference]: Start difference. First operand 23690 states and 33170 transitions. Second operand has 41 states, 41 states have (on average 7.536585365853658) internal successors, (309), 41 states have internal predecessors, (309), 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)