./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/seq-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/seq-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a --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 6c770a3141edeab927df0da4e8c2152e1fb2e87b0c43a352500a7e3d3cff4533 --- 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-b5237d8 [2022-11-21 16:10:43,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:10:43,117 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:10:43,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:10:43,147 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:10:43,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:10:43,149 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:10:43,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:10:43,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:10:43,154 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:10:43,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:10:43,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:10:43,157 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:10:43,158 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:10:43,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:10:43,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:10:43,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:10:43,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:10:43,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:10:43,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:10:43,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:10:43,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:10:43,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:10:43,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:10:43,176 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:10:43,176 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:10:43,177 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:10:43,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:10:43,178 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:10:43,179 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:10:43,180 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:10:43,181 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:10:43,182 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:10:43,183 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:10:43,184 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:10:43,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:10:43,186 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:10:43,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:10:43,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:10:43,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:10:43,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:10:43,190 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:10:43,215 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:10:43,215 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:10:43,216 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:10:43,216 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:10:43,217 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:10:43,217 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:10:43,218 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:10:43,218 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:10:43,219 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:10:43,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:10:43,219 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:10:43,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:10:43,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:10:43,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:10:43,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:10:43,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:10:43,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:10:43,221 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:10:43,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:10:43,222 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:10:43,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:10:43,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:10:43,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:10:43,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:10:43,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:10:43,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:10:43,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:10:43,224 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:10:43,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:10:43,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:10:43,224 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:10:43,225 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:10:43,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:10:43,225 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_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c770a3141edeab927df0da4e8c2152e1fb2e87b0c43a352500a7e3d3cff4533 [2022-11-21 16:10:43,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:10:43,556 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:10:43,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:10:43,561 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:10:43,561 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:10:43,562 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/loop-invgen/seq-3.i [2022-11-21 16:10:46,796 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:10:47,013 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:10:47,013 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/sv-benchmarks/c/loop-invgen/seq-3.i [2022-11-21 16:10:47,020 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/data/e894879a1/4b08a6d722d8432784d98cc6bb1d983f/FLAGc197e3101 [2022-11-21 16:10:47,037 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/data/e894879a1/4b08a6d722d8432784d98cc6bb1d983f [2022-11-21 16:10:47,043 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:10:47,045 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:10:47,049 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:10:47,049 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:10:47,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:10:47,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:10:47" (1/1) ... [2022-11-21 16:10:47,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10c76e39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:10:47, skipping insertion in model container [2022-11-21 16:10:47,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:10:47" (1/1) ... [2022-11-21 16:10:47,063 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:10:47,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:10:47,284 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_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/sv-benchmarks/c/loop-invgen/seq-3.i[893,906] [2022-11-21 16:10:47,310 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:10:47,323 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:10:47,339 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_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/sv-benchmarks/c/loop-invgen/seq-3.i[893,906] [2022-11-21 16:10:47,356 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:10:47,377 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:10:47,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:10:47 WrapperNode [2022-11-21 16:10:47,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:10:47,379 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:10:47,379 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:10:47,379 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:10:47,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:10:47" (1/1) ... [2022-11-21 16:10:47,394 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:10:47" (1/1) ... [2022-11-21 16:10:47,420 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-11-21 16:10:47,421 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:10:47,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:10:47,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:10:47,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:10:47,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:10:47" (1/1) ... [2022-11-21 16:10:47,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:10:47" (1/1) ... [2022-11-21 16:10:47,447 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:10:47" (1/1) ... [2022-11-21 16:10:47,448 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:10:47" (1/1) ... [2022-11-21 16:10:47,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:10:47" (1/1) ... [2022-11-21 16:10:47,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:10:47" (1/1) ... [2022-11-21 16:10:47,455 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:10:47" (1/1) ... [2022-11-21 16:10:47,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:10:47" (1/1) ... [2022-11-21 16:10:47,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:10:47,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:10:47,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:10:47,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:10:47,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:10:47" (1/1) ... [2022-11-21 16:10:47,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:10:47,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:10:47,498 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:10:47,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:10:47,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:10:47,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:10:47,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:10:47,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:10:47,633 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:10:47,634 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:10:47,783 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:10:47,790 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:10:47,790 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-21 16:10:47,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:10:47 BoogieIcfgContainer [2022-11-21 16:10:47,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:10:47,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:10:47,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:10:47,800 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:10:47,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:10:47" (1/3) ... [2022-11-21 16:10:47,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69b636a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:10:47, skipping insertion in model container [2022-11-21 16:10:47,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:10:47" (2/3) ... [2022-11-21 16:10:47,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69b636a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:10:47, skipping insertion in model container [2022-11-21 16:10:47,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:10:47" (3/3) ... [2022-11-21 16:10:47,804 INFO L112 eAbstractionObserver]: Analyzing ICFG seq-3.i [2022-11-21 16:10:47,825 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:10:47,825 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:10:47,874 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:10:47,881 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;@45a4072a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:10:47,881 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 16:10:47,886 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:47,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-21 16:10:47,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:10:47,894 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:10:47,894 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:10:47,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:10:47,899 INFO L85 PathProgramCache]: Analyzing trace with hash -163175075, now seen corresponding path program 1 times [2022-11-21 16:10:47,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:10:47,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984356002] [2022-11-21 16:10:47,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:10:47,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:10:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:10:48,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:48,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:10:48,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984356002] [2022-11-21 16:10:48,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984356002] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:10:48,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:10:48,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 16:10:48,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551723156] [2022-11-21 16:10:48,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:10:48,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:10:48,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:10:48,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:10:48,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:10:48,458 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 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 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:48,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:10:48,666 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2022-11-21 16:10:48,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:10:48,668 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-21 16:10:48,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:10:48,677 INFO L225 Difference]: With dead ends: 48 [2022-11-21 16:10:48,677 INFO L226 Difference]: Without dead ends: 23 [2022-11-21 16:10:48,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:10:48,690 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 49 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:10:48,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 60 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:10:48,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-21 16:10:48,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2022-11-21 16:10:48,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:48,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-21 16:10:48,739 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2022-11-21 16:10:48,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:10:48,740 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-21 16:10:48,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:48,740 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-21 16:10:48,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-21 16:10:48,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:10:48,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:10:48,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:10:48,743 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:10:48,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:10:48,744 INFO L85 PathProgramCache]: Analyzing trace with hash -712013865, now seen corresponding path program 1 times [2022-11-21 16:10:48,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:10:48,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786465021] [2022-11-21 16:10:48,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:10:48,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:10:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:10:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:48,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:10:48,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786465021] [2022-11-21 16:10:48,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786465021] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:10:48,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146811095] [2022-11-21 16:10:48,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:10:48,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:10:48,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:10:48,879 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:10:48,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:10:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:10:48,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 16:10:48,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:10:49,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:49,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:10:49,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146811095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:10:49,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:10:49,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-21 16:10:49,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519591340] [2022-11-21 16:10:49,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:10:49,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:10:49,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:10:49,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:10:49,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:10:49,046 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:49,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:10:49,098 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-11-21 16:10:49,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:10:49,099 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2022-11-21 16:10:49,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:10:49,100 INFO L225 Difference]: With dead ends: 26 [2022-11-21 16:10:49,100 INFO L226 Difference]: Without dead ends: 24 [2022-11-21 16:10:49,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:10:49,102 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:10:49,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 34 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:10:49,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-21 16:10:49,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2022-11-21 16:10:49,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:49,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-11-21 16:10:49,109 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2022-11-21 16:10:49,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:10:49,109 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-11-21 16:10:49,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:49,110 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-11-21 16:10:49,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-21 16:10:49,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:10:49,111 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:10:49,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:10:49,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:10:49,318 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:10:49,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:10:49,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1243265849, now seen corresponding path program 1 times [2022-11-21 16:10:49,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:10:49,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594329061] [2022-11-21 16:10:49,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:10:49,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:10:49,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:10:49,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:49,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:10:49,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594329061] [2022-11-21 16:10:49,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594329061] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:10:49,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045634811] [2022-11-21 16:10:49,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:10:49,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:10:49,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:10:49,511 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:10:49,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:10:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:10:49,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 16:10:49,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:10:49,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:49,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:10:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:49,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045634811] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:10:49,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:10:49,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-21 16:10:49,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378519368] [2022-11-21 16:10:49,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:10:49,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-21 16:10:49,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:10:49,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-21 16:10:49,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-21 16:10:49,973 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:50,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:10:50,134 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-11-21 16:10:50,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:10:50,134 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 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 15 [2022-11-21 16:10:50,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:10:50,135 INFO L225 Difference]: With dead ends: 38 [2022-11-21 16:10:50,136 INFO L226 Difference]: Without dead ends: 28 [2022-11-21 16:10:50,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2022-11-21 16:10:50,138 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:10:50,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 100 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:10:50,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-21 16:10:50,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2022-11-21 16:10:50,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:50,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-11-21 16:10:50,144 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 15 [2022-11-21 16:10:50,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:10:50,144 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-11-21 16:10:50,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:50,145 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-11-21 16:10:50,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-21 16:10:50,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:10:50,146 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:10:50,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:10:50,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:10:50,352 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:10:50,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:10:50,353 INFO L85 PathProgramCache]: Analyzing trace with hash -2084334856, now seen corresponding path program 1 times [2022-11-21 16:10:50,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:10:50,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768402197] [2022-11-21 16:10:50,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:10:50,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:10:50,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:10:50,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:50,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:10:50,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768402197] [2022-11-21 16:10:50,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768402197] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:10:50,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134992657] [2022-11-21 16:10:50,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:10:50,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:10:50,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:10:50,516 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:10:50,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:10:50,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:10:50,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 16:10:50,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:10:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:50,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:10:50,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:50,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134992657] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:10:50,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:10:50,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-21 16:10:50,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546659865] [2022-11-21 16:10:50,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:10:50,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 16:10:50,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:10:50,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 16:10:50,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-21 16:10:50,836 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:50,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:10:50,999 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-11-21 16:10:51,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 16:10:51,001 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 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 15 [2022-11-21 16:10:51,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:10:51,004 INFO L225 Difference]: With dead ends: 50 [2022-11-21 16:10:51,004 INFO L226 Difference]: Without dead ends: 40 [2022-11-21 16:10:51,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2022-11-21 16:10:51,008 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 79 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:10:51,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 60 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:10:51,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-21 16:10:51,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 21. [2022-11-21 16:10:51,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:51,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-11-21 16:10:51,022 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2022-11-21 16:10:51,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:10:51,022 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-11-21 16:10:51,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:51,022 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-11-21 16:10:51,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-21 16:10:51,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:10:51,023 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:10:51,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:10:51,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:10:51,227 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:10:51,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:10:51,228 INFO L85 PathProgramCache]: Analyzing trace with hash -929410893, now seen corresponding path program 2 times [2022-11-21 16:10:51,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:10:51,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945998494] [2022-11-21 16:10:51,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:10:51,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:10:51,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:10:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:51,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:10:51,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945998494] [2022-11-21 16:10:51,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945998494] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:10:51,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681290556] [2022-11-21 16:10:51,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:10:51,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:10:51,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:10:51,341 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:10:51,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:10:51,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:10:51,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:10:51,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 16:10:51,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:10:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:51,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:10:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:51,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681290556] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:10:51,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:10:51,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-11-21 16:10:51,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466466434] [2022-11-21 16:10:51,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:10:51,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:10:51,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:10:51,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:10:51,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:10:51,505 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:51,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:10:51,592 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-11-21 16:10:51,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 16:10:51,593 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 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 16 [2022-11-21 16:10:51,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:10:51,595 INFO L225 Difference]: With dead ends: 32 [2022-11-21 16:10:51,596 INFO L226 Difference]: Without dead ends: 30 [2022-11-21 16:10:51,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:10:51,597 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:10:51,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 61 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:10:51,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-21 16:10:51,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2022-11-21 16:10:51,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:51,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-21 16:10:51,610 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2022-11-21 16:10:51,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:10:51,611 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-21 16:10:51,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:51,611 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-21 16:10:51,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-21 16:10:51,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:10:51,613 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:10:51,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 16:10:51,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:10:51,819 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:10:51,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:10:51,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1579087069, now seen corresponding path program 3 times [2022-11-21 16:10:51,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:10:51,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627442216] [2022-11-21 16:10:51,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:10:51,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:10:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:10:51,982 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:51,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:10:51,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627442216] [2022-11-21 16:10:51,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627442216] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:10:51,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749178024] [2022-11-21 16:10:51,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:10:51,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:10:51,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:10:51,985 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:10:51,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 16:10:52,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-21 16:10:52,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:10:52,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 16:10:52,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:10:52,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:52,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:10:52,341 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:52,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749178024] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:10:52,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:10:52,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-11-21 16:10:52,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153743491] [2022-11-21 16:10:52,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:10:52,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-21 16:10:52,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:10:52,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-21 16:10:52,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-11-21 16:10:52,344 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:52,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:10:52,561 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2022-11-21 16:10:52,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 16:10:52,562 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-21 16:10:52,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:10:52,562 INFO L225 Difference]: With dead ends: 51 [2022-11-21 16:10:52,562 INFO L226 Difference]: Without dead ends: 38 [2022-11-21 16:10:52,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2022-11-21 16:10:52,564 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:10:52,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 90 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:10:52,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-21 16:10:52,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2022-11-21 16:10:52,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:52,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-11-21 16:10:52,570 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 19 [2022-11-21 16:10:52,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:10:52,570 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-11-21 16:10:52,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:52,573 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-11-21 16:10:52,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-21 16:10:52,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:10:52,574 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:10:52,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 16:10:52,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-21 16:10:52,784 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:10:52,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:10:52,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1678234908, now seen corresponding path program 1 times [2022-11-21 16:10:52,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:10:52,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597540941] [2022-11-21 16:10:52,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:10:52,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:10:52,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:10:52,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:52,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:10:52,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597540941] [2022-11-21 16:10:52,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597540941] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:10:52,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134803136] [2022-11-21 16:10:52,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:10:52,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:10:52,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:10:52,941 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:10:52,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 16:10:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:10:52,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 16:10:52,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:10:53,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:53,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:10:53,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:53,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134803136] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:10:53,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:10:53,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-11-21 16:10:53,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112973334] [2022-11-21 16:10:53,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:10:53,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-21 16:10:53,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:10:53,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-21 16:10:53,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-11-21 16:10:53,264 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:53,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:10:53,483 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2022-11-21 16:10:53,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 16:10:53,483 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 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 19 [2022-11-21 16:10:53,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:10:53,484 INFO L225 Difference]: With dead ends: 64 [2022-11-21 16:10:53,484 INFO L226 Difference]: Without dead ends: 51 [2022-11-21 16:10:53,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2022-11-21 16:10:53,485 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 89 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:10:53,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 102 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:10:53,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-21 16:10:53,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 25. [2022-11-21 16:10:53,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:53,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-11-21 16:10:53,492 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 19 [2022-11-21 16:10:53,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:10:53,493 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-11-21 16:10:53,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:53,493 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-11-21 16:10:53,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-21 16:10:53,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:10:53,494 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:10:53,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 16:10:53,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-21 16:10:53,700 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:10:53,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:10:53,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1265791229, now seen corresponding path program 2 times [2022-11-21 16:10:53,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:10:53,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291175948] [2022-11-21 16:10:53,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:10:53,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:10:53,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:10:53,856 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:53,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:10:53,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291175948] [2022-11-21 16:10:53,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291175948] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:10:53,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625640124] [2022-11-21 16:10:53,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:10:53,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:10:53,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:10:53,858 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:10:53,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 16:10:53,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:10:53,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:10:53,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 16:10:53,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:10:54,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:54,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:10:54,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:54,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625640124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:10:54,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:10:54,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-11-21 16:10:54,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106163129] [2022-11-21 16:10:54,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:10:54,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-21 16:10:54,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:10:54,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-21 16:10:54,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-11-21 16:10:54,163 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:54,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:10:54,377 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2022-11-21 16:10:54,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 16:10:54,377 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 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 19 [2022-11-21 16:10:54,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:10:54,378 INFO L225 Difference]: With dead ends: 79 [2022-11-21 16:10:54,378 INFO L226 Difference]: Without dead ends: 66 [2022-11-21 16:10:54,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=627, Unknown=0, NotChecked=0, Total=812 [2022-11-21 16:10:54,379 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 99 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:10:54,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 106 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:10:54,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-21 16:10:54,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 27. [2022-11-21 16:10:54,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:54,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-11-21 16:10:54,387 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 19 [2022-11-21 16:10:54,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:10:54,387 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-11-21 16:10:54,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:54,388 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-11-21 16:10:54,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-21 16:10:54,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:10:54,389 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:10:54,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 16:10:54,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:10:54,602 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:10:54,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:10:54,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1081918121, now seen corresponding path program 4 times [2022-11-21 16:10:54,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:10:54,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634301629] [2022-11-21 16:10:54,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:10:54,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:10:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:10:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:54,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:10:54,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634301629] [2022-11-21 16:10:54,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634301629] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:10:54,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327551246] [2022-11-21 16:10:54,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:10:54,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:10:54,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:10:54,702 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:10:54,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 16:10:54,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:10:54,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:10:54,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 16:10:54,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:10:54,792 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:54,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:10:54,854 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:54,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327551246] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:10:54,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:10:54,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-11-21 16:10:54,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126247980] [2022-11-21 16:10:54,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:10:54,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 16:10:54,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:10:54,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 16:10:54,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:10:54,857 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:54,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:10:54,959 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-11-21 16:10:54,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:10:54,960 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 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 20 [2022-11-21 16:10:54,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:10:54,961 INFO L225 Difference]: With dead ends: 38 [2022-11-21 16:10:54,961 INFO L226 Difference]: Without dead ends: 36 [2022-11-21 16:10:54,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:10:54,962 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 34 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:10:54,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:10:54,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-21 16:10:54,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2022-11-21 16:10:54,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:54,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-11-21 16:10:54,971 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 20 [2022-11-21 16:10:54,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:10:54,972 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-11-21 16:10:54,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:54,972 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-11-21 16:10:54,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-21 16:10:54,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:10:54,973 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:10:54,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-21 16:10:55,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-21 16:10:55,180 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:10:55,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:10:55,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1983310407, now seen corresponding path program 5 times [2022-11-21 16:10:55,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:10:55,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677603320] [2022-11-21 16:10:55,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:10:55,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:10:55,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:10:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:55,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:10:55,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677603320] [2022-11-21 16:10:55,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677603320] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:10:55,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92860242] [2022-11-21 16:10:55,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:10:55,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:10:55,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:10:55,352 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:10:55,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 16:10:55,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-21 16:10:55,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:10:55,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 16:10:55,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:10:55,665 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:55,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:10:55,797 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:55,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92860242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:10:55,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:10:55,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-11-21 16:10:55,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635701603] [2022-11-21 16:10:55,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:10:55,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-21 16:10:55,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:10:55,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-21 16:10:55,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-11-21 16:10:55,800 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:56,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:10:56,038 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2022-11-21 16:10:56,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:10:56,038 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 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 23 [2022-11-21 16:10:56,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:10:56,041 INFO L225 Difference]: With dead ends: 64 [2022-11-21 16:10:56,041 INFO L226 Difference]: Without dead ends: 48 [2022-11-21 16:10:56,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=930, Unknown=0, NotChecked=0, Total=1190 [2022-11-21 16:10:56,044 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 59 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:10:56,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 121 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:10:56,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-21 16:10:56,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2022-11-21 16:10:56,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:56,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-11-21 16:10:56,062 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2022-11-21 16:10:56,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:10:56,063 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-11-21 16:10:56,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:56,063 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-11-21 16:10:56,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-21 16:10:56,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:10:56,064 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:10:56,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 16:10:56,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-21 16:10:56,271 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:10:56,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:10:56,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1279672712, now seen corresponding path program 2 times [2022-11-21 16:10:56,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:10:56,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228854930] [2022-11-21 16:10:56,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:10:56,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:10:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:10:56,429 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:56,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:10:56,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228854930] [2022-11-21 16:10:56,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228854930] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:10:56,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731645174] [2022-11-21 16:10:56,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:10:56,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:10:56,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:10:56,431 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:10:56,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 16:10:56,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:10:56,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:10:56,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 16:10:56,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:10:56,720 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:56,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:10:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:56,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731645174] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:10:56,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:10:56,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2022-11-21 16:10:56,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998061741] [2022-11-21 16:10:56,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:10:56,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 16:10:56,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:10:56,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 16:10:56,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:10:56,866 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:57,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:10:57,175 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2022-11-21 16:10:57,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-21 16:10:57,175 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 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 23 [2022-11-21 16:10:57,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:10:57,176 INFO L225 Difference]: With dead ends: 81 [2022-11-21 16:10:57,176 INFO L226 Difference]: Without dead ends: 65 [2022-11-21 16:10:57,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=274, Invalid=1058, Unknown=0, NotChecked=0, Total=1332 [2022-11-21 16:10:57,177 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 87 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:10:57,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 133 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:10:57,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-21 16:10:57,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 31. [2022-11-21 16:10:57,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:57,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-11-21 16:10:57,188 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2022-11-21 16:10:57,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:10:57,189 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-11-21 16:10:57,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:57,189 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-11-21 16:10:57,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-21 16:10:57,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:10:57,190 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:10:57,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 16:10:57,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-21 16:10:57,390 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:10:57,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:10:57,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1791066585, now seen corresponding path program 3 times [2022-11-21 16:10:57,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:10:57,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910516840] [2022-11-21 16:10:57,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:10:57,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:10:57,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:10:57,548 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:57,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:10:57,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910516840] [2022-11-21 16:10:57,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910516840] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:10:57,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332133839] [2022-11-21 16:10:57,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:10:57,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:10:57,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:10:57,550 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:10:57,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 16:10:57,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-21 16:10:57,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:10:57,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 16:10:57,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:10:57,830 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:57,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:10:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:57,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332133839] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:10:57,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:10:57,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2022-11-21 16:10:57,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970871191] [2022-11-21 16:10:57,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:10:57,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-21 16:10:57,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:10:57,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-21 16:10:57,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-11-21 16:10:57,964 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:58,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:10:58,325 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2022-11-21 16:10:58,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-21 16:10:58,326 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 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 23 [2022-11-21 16:10:58,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:10:58,327 INFO L225 Difference]: With dead ends: 97 [2022-11-21 16:10:58,327 INFO L226 Difference]: Without dead ends: 81 [2022-11-21 16:10:58,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=273, Invalid=1059, Unknown=0, NotChecked=0, Total=1332 [2022-11-21 16:10:58,329 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 120 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:10:58,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 152 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:10:58,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-21 16:10:58,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 31. [2022-11-21 16:10:58,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:58,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-11-21 16:10:58,347 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2022-11-21 16:10:58,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:10:58,347 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-11-21 16:10:58,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:58,347 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-11-21 16:10:58,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-21 16:10:58,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:10:58,350 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:10:58,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 16:10:58,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:10:58,557 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:10:58,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:10:58,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1712107944, now seen corresponding path program 3 times [2022-11-21 16:10:58,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:10:58,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656728196] [2022-11-21 16:10:58,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:10:58,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:10:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:10:58,707 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:58,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:10:58,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656728196] [2022-11-21 16:10:58,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656728196] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:10:58,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703631743] [2022-11-21 16:10:58,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:10:58,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:10:58,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:10:58,711 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:10:58,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 16:10:58,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-21 16:10:58,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:10:58,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 16:10:58,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:10:58,966 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:58,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:10:59,113 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:59,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703631743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:10:59,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:10:59,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2022-11-21 16:10:59,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144507661] [2022-11-21 16:10:59,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:10:59,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-21 16:10:59,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:10:59,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-21 16:10:59,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-11-21 16:10:59,116 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:59,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:10:59,404 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2022-11-21 16:10:59,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-21 16:10:59,405 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 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 23 [2022-11-21 16:10:59,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:10:59,406 INFO L225 Difference]: With dead ends: 115 [2022-11-21 16:10:59,406 INFO L226 Difference]: Without dead ends: 99 [2022-11-21 16:10:59,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=933, Unknown=0, NotChecked=0, Total=1190 [2022-11-21 16:10:59,407 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 149 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:10:59,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 119 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:10:59,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-21 16:10:59,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 33. [2022-11-21 16:10:59,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:59,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-11-21 16:10:59,417 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 23 [2022-11-21 16:10:59,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:10:59,417 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-11-21 16:10:59,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:59,418 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-11-21 16:10:59,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-21 16:10:59,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:10:59,419 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:10:59,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-21 16:10:59,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-21 16:10:59,630 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:10:59,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:10:59,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1769959117, now seen corresponding path program 6 times [2022-11-21 16:10:59,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:10:59,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124690815] [2022-11-21 16:10:59,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:10:59,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:10:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:10:59,774 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:59,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:10:59,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124690815] [2022-11-21 16:10:59,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124690815] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:10:59,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196104525] [2022-11-21 16:10:59,775 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:10:59,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:10:59,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:10:59,777 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:10:59,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 16:10:59,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-21 16:10:59,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:10:59,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 16:10:59,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:10:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:59,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:10:59,973 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:59,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196104525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:10:59,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:10:59,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2022-11-21 16:10:59,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368925596] [2022-11-21 16:10:59,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:10:59,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:10:59,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:10:59,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:10:59,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:10:59,976 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:00,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:00,095 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-11-21 16:11:00,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 16:11:00,095 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 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 24 [2022-11-21 16:11:00,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:00,096 INFO L225 Difference]: With dead ends: 44 [2022-11-21 16:11:00,096 INFO L226 Difference]: Without dead ends: 42 [2022-11-21 16:11:00,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 8 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2022-11-21 16:11:00,097 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 36 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:00,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 84 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:00,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-21 16:11:00,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2022-11-21 16:11:00,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:00,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-11-21 16:11:00,108 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 24 [2022-11-21 16:11:00,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:00,108 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-11-21 16:11:00,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:00,109 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-11-21 16:11:00,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-21 16:11:00,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:00,109 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:00,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-21 16:11:00,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-21 16:11:00,316 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:00,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:00,316 INFO L85 PathProgramCache]: Analyzing trace with hash 466281565, now seen corresponding path program 7 times [2022-11-21 16:11:00,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:00,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712763598] [2022-11-21 16:11:00,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:00,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:00,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:00,509 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:00,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:00,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712763598] [2022-11-21 16:11:00,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712763598] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:00,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784713863] [2022-11-21 16:11:00,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:11:00,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:00,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:00,512 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:00,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-21 16:11:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:00,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 16:11:00,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:00,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:01,082 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:01,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784713863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:01,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:01,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2022-11-21 16:11:01,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742443906] [2022-11-21 16:11:01,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:01,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-21 16:11:01,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:01,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-21 16:11:01,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2022-11-21 16:11:01,084 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:01,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:01,389 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2022-11-21 16:11:01,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 16:11:01,389 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-21 16:11:01,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:01,390 INFO L225 Difference]: With dead ends: 77 [2022-11-21 16:11:01,390 INFO L226 Difference]: Without dead ends: 58 [2022-11-21 16:11:01,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=345, Invalid=1295, Unknown=0, NotChecked=0, Total=1640 [2022-11-21 16:11:01,392 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 68 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:01,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 147 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:01,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-21 16:11:01,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2022-11-21 16:11:01,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:01,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-11-21 16:11:01,404 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2022-11-21 16:11:01,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:01,404 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-11-21 16:11:01,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:01,405 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-11-21 16:11:01,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-21 16:11:01,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:01,406 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:01,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-21 16:11:01,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-21 16:11:01,612 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:01,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:01,612 INFO L85 PathProgramCache]: Analyzing trace with hash 397088156, now seen corresponding path program 4 times [2022-11-21 16:11:01,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:01,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946890282] [2022-11-21 16:11:01,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:01,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:01,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:01,823 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:01,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:01,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946890282] [2022-11-21 16:11:01,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946890282] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:01,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609462080] [2022-11-21 16:11:01,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:11:01,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:01,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:01,825 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:01,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-21 16:11:01,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:11:01,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:01,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 16:11:01,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:02,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:02,353 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:02,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609462080] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:02,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:02,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 28 [2022-11-21 16:11:02,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593774235] [2022-11-21 16:11:02,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:02,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-21 16:11:02,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:02,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-21 16:11:02,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2022-11-21 16:11:02,355 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:02,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:02,682 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2022-11-21 16:11:02,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-21 16:11:02,682 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 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 27 [2022-11-21 16:11:02,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:02,683 INFO L225 Difference]: With dead ends: 98 [2022-11-21 16:11:02,683 INFO L226 Difference]: Without dead ends: 79 [2022-11-21 16:11:02,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 11 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=374, Invalid=1518, Unknown=0, NotChecked=0, Total=1892 [2022-11-21 16:11:02,684 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 118 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:02,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 104 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:02,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-21 16:11:02,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 37. [2022-11-21 16:11:02,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:02,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-11-21 16:11:02,696 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2022-11-21 16:11:02,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:02,696 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-11-21 16:11:02,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:02,697 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-11-21 16:11:02,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-21 16:11:02,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:02,698 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:02,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-21 16:11:02,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-21 16:11:02,904 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:02,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:02,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1267711875, now seen corresponding path program 5 times [2022-11-21 16:11:02,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:02,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554266523] [2022-11-21 16:11:02,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:02,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:02,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:03,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:03,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554266523] [2022-11-21 16:11:03,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554266523] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:03,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828445339] [2022-11-21 16:11:03,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:11:03,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:03,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:03,096 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:03,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-21 16:11:03,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-21 16:11:03,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:03,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 16:11:03,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:03,417 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:03,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:03,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828445339] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:03,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:03,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2022-11-21 16:11:03,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539365999] [2022-11-21 16:11:03,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:03,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-21 16:11:03,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:03,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-21 16:11:03,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2022-11-21 16:11:03,587 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:03,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:03,989 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2022-11-21 16:11:03,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-21 16:11:03,990 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 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 27 [2022-11-21 16:11:03,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:03,991 INFO L225 Difference]: With dead ends: 118 [2022-11-21 16:11:03,991 INFO L226 Difference]: Without dead ends: 99 [2022-11-21 16:11:03,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 31 SyntacticMatches, 11 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=386, Invalid=1594, Unknown=0, NotChecked=0, Total=1980 [2022-11-21 16:11:03,992 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 104 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:03,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 171 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:03,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-21 16:11:04,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 37. [2022-11-21 16:11:04,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:04,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-11-21 16:11:04,006 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2022-11-21 16:11:04,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:04,006 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-11-21 16:11:04,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:04,007 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-11-21 16:11:04,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-21 16:11:04,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:04,008 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:04,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-21 16:11:04,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-21 16:11:04,214 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:04,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:04,214 INFO L85 PathProgramCache]: Analyzing trace with hash 618247548, now seen corresponding path program 6 times [2022-11-21 16:11:04,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:04,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767076128] [2022-11-21 16:11:04,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:04,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:04,398 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:04,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:04,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767076128] [2022-11-21 16:11:04,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767076128] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:04,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136509956] [2022-11-21 16:11:04,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:11:04,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:04,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:04,400 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:04,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-21 16:11:04,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-21 16:11:04,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:04,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 16:11:04,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:04,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:04,880 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:04,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136509956] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:04,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:04,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 26 [2022-11-21 16:11:04,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835681347] [2022-11-21 16:11:04,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:04,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-21 16:11:04,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:04,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-21 16:11:04,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-11-21 16:11:04,883 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:05,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:05,262 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2022-11-21 16:11:05,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 16:11:05,262 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 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 27 [2022-11-21 16:11:05,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:05,263 INFO L225 Difference]: With dead ends: 137 [2022-11-21 16:11:05,263 INFO L226 Difference]: Without dead ends: 118 [2022-11-21 16:11:05,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 32 SyntacticMatches, 11 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=372, Invalid=1520, Unknown=0, NotChecked=0, Total=1892 [2022-11-21 16:11:05,264 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 173 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:05,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 133 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:05,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-21 16:11:05,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 37. [2022-11-21 16:11:05,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:05,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-11-21 16:11:05,278 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2022-11-21 16:11:05,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:05,278 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-11-21 16:11:05,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:05,279 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-11-21 16:11:05,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-21 16:11:05,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:05,280 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:05,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-21 16:11:05,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:05,485 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:05,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:05,486 INFO L85 PathProgramCache]: Analyzing trace with hash 956179613, now seen corresponding path program 4 times [2022-11-21 16:11:05,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:05,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482820482] [2022-11-21 16:11:05,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:05,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:05,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:05,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:05,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482820482] [2022-11-21 16:11:05,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482820482] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:05,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212746825] [2022-11-21 16:11:05,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:11:05,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:05,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:05,693 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:05,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-21 16:11:05,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:11:05,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:05,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 16:11:05,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:05,997 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:05,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:06,157 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:06,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212746825] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:06,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:06,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 25 [2022-11-21 16:11:06,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226288905] [2022-11-21 16:11:06,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:06,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-21 16:11:06,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:06,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-21 16:11:06,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-11-21 16:11:06,159 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:06,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:06,522 INFO L93 Difference]: Finished difference Result 158 states and 171 transitions. [2022-11-21 16:11:06,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-21 16:11:06,523 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 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 27 [2022-11-21 16:11:06,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:06,523 INFO L225 Difference]: With dead ends: 158 [2022-11-21 16:11:06,524 INFO L226 Difference]: Without dead ends: 139 [2022-11-21 16:11:06,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 33 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=341, Invalid=1299, Unknown=0, NotChecked=0, Total=1640 [2022-11-21 16:11:06,525 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 151 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:06,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 150 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:06,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-21 16:11:06,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 39. [2022-11-21 16:11:06,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 38 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:06,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-11-21 16:11:06,539 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 27 [2022-11-21 16:11:06,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:06,540 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-11-21 16:11:06,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:06,540 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-11-21 16:11:06,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-21 16:11:06,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:06,541 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:06,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-21 16:11:06,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:06,747 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:06,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:06,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1056697641, now seen corresponding path program 8 times [2022-11-21 16:11:06,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:06,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072440770] [2022-11-21 16:11:06,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:06,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:06,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:06,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:06,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072440770] [2022-11-21 16:11:06,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072440770] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:06,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108538364] [2022-11-21 16:11:06,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:11:06,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:06,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:06,885 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:06,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-21 16:11:06,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:11:06,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:06,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-21 16:11:06,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:07,008 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:07,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:07,108 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:07,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108538364] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:07,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:07,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-11-21 16:11:07,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858708834] [2022-11-21 16:11:07,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:07,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:11:07,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:07,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:11:07,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:11:07,110 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:07,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:07,257 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-11-21 16:11:07,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-21 16:11:07,258 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 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 28 [2022-11-21 16:11:07,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:07,258 INFO L225 Difference]: With dead ends: 50 [2022-11-21 16:11:07,258 INFO L226 Difference]: Without dead ends: 48 [2022-11-21 16:11:07,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 10 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:11:07,260 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 52 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:07,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 80 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:07,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-21 16:11:07,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2022-11-21 16:11:07,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:07,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2022-11-21 16:11:07,279 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 28 [2022-11-21 16:11:07,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:07,280 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2022-11-21 16:11:07,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:07,280 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2022-11-21 16:11:07,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-21 16:11:07,281 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:07,281 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:07,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-21 16:11:07,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:07,487 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:07,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:07,488 INFO L85 PathProgramCache]: Analyzing trace with hash 2035699769, now seen corresponding path program 9 times [2022-11-21 16:11:07,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:07,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503088705] [2022-11-21 16:11:07,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:07,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:07,717 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:07,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:07,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503088705] [2022-11-21 16:11:07,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503088705] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:07,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796065807] [2022-11-21 16:11:07,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:11:07,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:07,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:07,719 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:07,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-21 16:11:07,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-21 16:11:07,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:07,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-21 16:11:07,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:08,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:08,369 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:08,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796065807] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:08,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:08,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-11-21 16:11:08,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986895455] [2022-11-21 16:11:08,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:08,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 16:11:08,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:08,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 16:11:08,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 16:11:08,371 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:08,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:08,735 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2022-11-21 16:11:08,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-21 16:11:08,735 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 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 31 [2022-11-21 16:11:08,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:08,736 INFO L225 Difference]: With dead ends: 90 [2022-11-21 16:11:08,736 INFO L226 Difference]: Without dead ends: 68 [2022-11-21 16:11:08,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 33 SyntacticMatches, 13 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=442, Invalid=1720, Unknown=0, NotChecked=0, Total=2162 [2022-11-21 16:11:08,738 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:08,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 157 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:08,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-21 16:11:08,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 43. [2022-11-21 16:11:08,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:08,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-11-21 16:11:08,756 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2022-11-21 16:11:08,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:08,756 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-11-21 16:11:08,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:08,757 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-11-21 16:11:08,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-21 16:11:08,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:08,757 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:08,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-21 16:11:08,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-21 16:11:08,958 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:08,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:08,959 INFO L85 PathProgramCache]: Analyzing trace with hash 992856568, now seen corresponding path program 7 times [2022-11-21 16:11:08,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:08,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470876568] [2022-11-21 16:11:08,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:08,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:09,186 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:09,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:09,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470876568] [2022-11-21 16:11:09,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470876568] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:09,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951853525] [2022-11-21 16:11:09,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:11:09,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:09,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:09,188 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:09,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-21 16:11:09,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:09,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-21 16:11:09,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:09,591 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:09,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:09,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951853525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:09,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:09,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2022-11-21 16:11:09,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151968546] [2022-11-21 16:11:09,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:09,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-21 16:11:09,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:09,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-21 16:11:09,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2022-11-21 16:11:09,808 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:10,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:10,267 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2022-11-21 16:11:10,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-21 16:11:10,267 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-21 16:11:10,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:10,268 INFO L225 Difference]: With dead ends: 115 [2022-11-21 16:11:10,268 INFO L226 Difference]: Without dead ends: 93 [2022-11-21 16:11:10,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 13 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=490, Invalid=2060, Unknown=0, NotChecked=0, Total=2550 [2022-11-21 16:11:10,270 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 93 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:10,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 225 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:10,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-21 16:11:10,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 43. [2022-11-21 16:11:10,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:10,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-11-21 16:11:10,287 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2022-11-21 16:11:10,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:10,287 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-11-21 16:11:10,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:10,288 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-11-21 16:11:10,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-21 16:11:10,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:10,288 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:10,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-21 16:11:10,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:10,490 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:10,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:10,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1236311129, now seen corresponding path program 8 times [2022-11-21 16:11:10,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:10,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253957218] [2022-11-21 16:11:10,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:10,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:10,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:10,788 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:10,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:10,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253957218] [2022-11-21 16:11:10,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253957218] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:10,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124207829] [2022-11-21 16:11:10,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:11:10,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:10,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:10,791 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:10,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-21 16:11:10,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:11:10,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:10,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-21 16:11:10,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:11,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:11,373 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:11,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124207829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:11,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:11,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 31 [2022-11-21 16:11:11,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828564444] [2022-11-21 16:11:11,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:11,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-21 16:11:11,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:11,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-21 16:11:11,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2022-11-21 16:11:11,376 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:11,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:11,835 INFO L93 Difference]: Finished difference Result 139 states and 150 transitions. [2022-11-21 16:11:11,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-21 16:11:11,835 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 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 31 [2022-11-21 16:11:11,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:11,836 INFO L225 Difference]: With dead ends: 139 [2022-11-21 16:11:11,836 INFO L226 Difference]: Without dead ends: 117 [2022-11-21 16:11:11,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 35 SyntacticMatches, 13 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=520, Invalid=2236, Unknown=0, NotChecked=0, Total=2756 [2022-11-21 16:11:11,838 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 152 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:11,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 173 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:11,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-21 16:11:11,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 43. [2022-11-21 16:11:11,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:11,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-11-21 16:11:11,852 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2022-11-21 16:11:11,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:11,853 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-11-21 16:11:11,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:11,853 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-11-21 16:11:11,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-21 16:11:11,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:11,853 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:11,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-21 16:11:12,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-21 16:11:12,054 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:12,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:12,055 INFO L85 PathProgramCache]: Analyzing trace with hash -834045480, now seen corresponding path program 9 times [2022-11-21 16:11:12,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:12,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086451731] [2022-11-21 16:11:12,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:12,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:12,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:12,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:12,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086451731] [2022-11-21 16:11:12,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086451731] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:12,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749528216] [2022-11-21 16:11:12,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:11:12,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:12,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:12,279 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:12,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-21 16:11:12,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-21 16:11:12,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:12,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-21 16:11:12,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:12,653 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:12,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:12,833 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:12,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749528216] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:12,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:12,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 30 [2022-11-21 16:11:12,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511965311] [2022-11-21 16:11:12,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:12,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-21 16:11:12,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:12,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-21 16:11:12,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2022-11-21 16:11:12,836 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:13,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:13,312 INFO L93 Difference]: Finished difference Result 162 states and 174 transitions. [2022-11-21 16:11:13,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-21 16:11:13,312 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 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 31 [2022-11-21 16:11:13,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:13,313 INFO L225 Difference]: With dead ends: 162 [2022-11-21 16:11:13,314 INFO L226 Difference]: Without dead ends: 140 [2022-11-21 16:11:13,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 36 SyntacticMatches, 13 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=519, Invalid=2237, Unknown=0, NotChecked=0, Total=2756 [2022-11-21 16:11:13,315 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 173 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:13,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 171 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:13,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-21 16:11:13,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 43. [2022-11-21 16:11:13,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:13,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-11-21 16:11:13,330 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2022-11-21 16:11:13,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:13,330 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-11-21 16:11:13,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:13,330 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-11-21 16:11:13,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-21 16:11:13,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:13,331 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:13,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-21 16:11:13,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-21 16:11:13,531 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:13,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:13,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1315926137, now seen corresponding path program 10 times [2022-11-21 16:11:13,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:13,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426740457] [2022-11-21 16:11:13,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:13,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:13,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:13,750 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:13,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:13,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426740457] [2022-11-21 16:11:13,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426740457] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:13,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600515607] [2022-11-21 16:11:13,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:11:13,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:13,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:13,753 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:13,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-21 16:11:13,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:11:13,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:13,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-21 16:11:13,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:14,130 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:14,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:14,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600515607] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:14,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:14,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-11-21 16:11:14,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831438093] [2022-11-21 16:11:14,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:14,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-21 16:11:14,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:14,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-21 16:11:14,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2022-11-21 16:11:14,328 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:14,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:14,822 INFO L93 Difference]: Finished difference Result 184 states and 197 transitions. [2022-11-21 16:11:14,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-21 16:11:14,823 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 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 31 [2022-11-21 16:11:14,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:14,824 INFO L225 Difference]: With dead ends: 184 [2022-11-21 16:11:14,824 INFO L226 Difference]: Without dead ends: 162 [2022-11-21 16:11:14,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 37 SyntacticMatches, 13 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=487, Invalid=2063, Unknown=0, NotChecked=0, Total=2550 [2022-11-21 16:11:14,826 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 177 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:14,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 165 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:14,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-21 16:11:14,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 43. [2022-11-21 16:11:14,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:14,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-11-21 16:11:14,848 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2022-11-21 16:11:14,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:14,848 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-11-21 16:11:14,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:14,849 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-11-21 16:11:14,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-21 16:11:14,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:14,849 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:14,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-21 16:11:15,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:15,055 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:15,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:15,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1246732728, now seen corresponding path program 5 times [2022-11-21 16:11:15,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:15,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431047930] [2022-11-21 16:11:15,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:15,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:15,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:15,287 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:15,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:15,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431047930] [2022-11-21 16:11:15,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431047930] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:15,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150193009] [2022-11-21 16:11:15,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:11:15,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:15,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:15,289 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:15,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-21 16:11:15,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-21 16:11:15,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:15,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-21 16:11:15,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:15,640 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:15,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:15,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150193009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:15,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:15,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 28 [2022-11-21 16:11:15,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295257665] [2022-11-21 16:11:15,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:15,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-21 16:11:15,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:15,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-21 16:11:15,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2022-11-21 16:11:15,819 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:16,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:16,276 INFO L93 Difference]: Finished difference Result 208 states and 223 transitions. [2022-11-21 16:11:16,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-21 16:11:16,276 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 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 31 [2022-11-21 16:11:16,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:16,277 INFO L225 Difference]: With dead ends: 208 [2022-11-21 16:11:16,277 INFO L226 Difference]: Without dead ends: 186 [2022-11-21 16:11:16,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 38 SyntacticMatches, 13 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=1725, Unknown=0, NotChecked=0, Total=2162 [2022-11-21 16:11:16,279 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 255 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:16,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 129 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:16,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-11-21 16:11:16,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 45. [2022-11-21 16:11:16,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:16,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-11-21 16:11:16,295 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 31 [2022-11-21 16:11:16,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:16,295 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-11-21 16:11:16,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:16,295 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-11-21 16:11:16,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-21 16:11:16,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:16,296 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:16,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-11-21 16:11:16,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:16,496 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:16,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:16,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1761587635, now seen corresponding path program 10 times [2022-11-21 16:11:16,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:16,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421157321] [2022-11-21 16:11:16,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:16,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:16,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:16,631 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:16,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:16,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421157321] [2022-11-21 16:11:16,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421157321] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:16,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558942942] [2022-11-21 16:11:16,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:11:16,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:16,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:16,634 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:16,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-21 16:11:16,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:11:16,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:16,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 16:11:16,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:16,757 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:16,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:16,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558942942] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:16,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:16,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-11-21 16:11:16,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684052506] [2022-11-21 16:11:16,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:16,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 16:11:16,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:16,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 16:11:16,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:11:16,867 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:17,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:17,035 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2022-11-21 16:11:17,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-21 16:11:17,036 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 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 32 [2022-11-21 16:11:17,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:17,044 INFO L225 Difference]: With dead ends: 56 [2022-11-21 16:11:17,044 INFO L226 Difference]: Without dead ends: 54 [2022-11-21 16:11:17,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 12 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2022-11-21 16:11:17,046 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:17,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 100 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:17,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-21 16:11:17,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2022-11-21 16:11:17,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:17,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-11-21 16:11:17,071 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 32 [2022-11-21 16:11:17,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:17,072 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-11-21 16:11:17,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:17,072 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-11-21 16:11:17,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-21 16:11:17,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:17,073 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:17,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-21 16:11:17,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:17,279 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:17,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:17,279 INFO L85 PathProgramCache]: Analyzing trace with hash -743312419, now seen corresponding path program 11 times [2022-11-21 16:11:17,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:17,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718156383] [2022-11-21 16:11:17,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:17,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:17,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:17,554 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:17,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:17,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718156383] [2022-11-21 16:11:17,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718156383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:17,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036776981] [2022-11-21 16:11:17,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:11:17,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:17,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:17,556 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:17,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-21 16:11:17,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-21 16:11:17,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:17,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 16:11:17,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:18,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:18,314 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:18,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036776981] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:18,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:18,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2022-11-21 16:11:18,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474216806] [2022-11-21 16:11:18,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:18,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-21 16:11:18,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:18,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-21 16:11:18,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2022-11-21 16:11:18,318 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:18,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:18,719 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2022-11-21 16:11:18,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-21 16:11:18,719 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 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 35 [2022-11-21 16:11:18,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:18,719 INFO L225 Difference]: With dead ends: 103 [2022-11-21 16:11:18,720 INFO L226 Difference]: Without dead ends: 78 [2022-11-21 16:11:18,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 15 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=551, Invalid=2205, Unknown=0, NotChecked=0, Total=2756 [2022-11-21 16:11:18,721 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 85 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:18,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 142 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:18,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-21 16:11:18,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2022-11-21 16:11:18,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:18,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-11-21 16:11:18,741 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2022-11-21 16:11:18,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:18,741 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-11-21 16:11:18,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:18,741 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-11-21 16:11:18,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-21 16:11:18,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:18,742 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:18,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-11-21 16:11:18,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-21 16:11:18,942 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:18,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:18,943 INFO L85 PathProgramCache]: Analyzing trace with hash -2052557284, now seen corresponding path program 11 times [2022-11-21 16:11:18,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:18,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233404634] [2022-11-21 16:11:18,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:18,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:19,200 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 41 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:19,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:19,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233404634] [2022-11-21 16:11:19,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233404634] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:19,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592911563] [2022-11-21 16:11:19,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:11:19,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:19,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:19,203 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:19,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-21 16:11:19,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-21 16:11:19,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:19,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 16:11:19,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:19,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:19,927 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:19,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592911563] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:19,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:19,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 36 [2022-11-21 16:11:19,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279115865] [2022-11-21 16:11:19,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:19,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-21 16:11:19,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:19,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-21 16:11:19,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1023, Unknown=0, NotChecked=0, Total=1260 [2022-11-21 16:11:19,929 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:20,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:20,472 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2022-11-21 16:11:20,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-21 16:11:20,472 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 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 35 [2022-11-21 16:11:20,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:20,472 INFO L225 Difference]: With dead ends: 132 [2022-11-21 16:11:20,472 INFO L226 Difference]: Without dead ends: 107 [2022-11-21 16:11:20,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 38 SyntacticMatches, 15 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=622, Invalid=2684, Unknown=0, NotChecked=0, Total=3306 [2022-11-21 16:11:20,474 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 123 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:20,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 182 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:20,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-21 16:11:20,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 49. [2022-11-21 16:11:20,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:20,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-11-21 16:11:20,503 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2022-11-21 16:11:20,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:20,503 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-11-21 16:11:20,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:20,503 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-11-21 16:11:20,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-21 16:11:20,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:20,504 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:20,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-21 16:11:20,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-21 16:11:20,705 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:20,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:20,705 INFO L85 PathProgramCache]: Analyzing trace with hash 399060989, now seen corresponding path program 12 times [2022-11-21 16:11:20,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:20,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940391489] [2022-11-21 16:11:20,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:20,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:20,951 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:20,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:20,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940391489] [2022-11-21 16:11:20,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940391489] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:20,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135131572] [2022-11-21 16:11:20,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:11:20,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:20,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:20,953 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:20,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-21 16:11:21,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-21 16:11:21,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:21,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 16:11:21,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:21,408 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:21,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:21,601 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:21,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135131572] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:21,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:21,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 35 [2022-11-21 16:11:21,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638041582] [2022-11-21 16:11:21,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:21,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-21 16:11:21,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:21,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-21 16:11:21,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2022-11-21 16:11:21,604 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:22,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:22,221 INFO L93 Difference]: Finished difference Result 160 states and 172 transitions. [2022-11-21 16:11:22,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-21 16:11:22,222 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 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 35 [2022-11-21 16:11:22,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:22,223 INFO L225 Difference]: With dead ends: 160 [2022-11-21 16:11:22,223 INFO L226 Difference]: Without dead ends: 135 [2022-11-21 16:11:22,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 39 SyntacticMatches, 15 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=675, Invalid=2985, Unknown=0, NotChecked=0, Total=3660 [2022-11-21 16:11:22,224 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 134 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:22,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 167 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:22,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-21 16:11:22,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 49. [2022-11-21 16:11:22,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:22,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-11-21 16:11:22,247 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2022-11-21 16:11:22,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:22,247 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-11-21 16:11:22,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:22,248 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-11-21 16:11:22,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-21 16:11:22,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:22,249 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:22,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-21 16:11:22,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:22,455 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:22,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:22,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1045875204, now seen corresponding path program 13 times [2022-11-21 16:11:22,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:22,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283098791] [2022-11-21 16:11:22,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:22,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:22,696 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:22,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:22,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283098791] [2022-11-21 16:11:22,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283098791] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:22,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637974242] [2022-11-21 16:11:22,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:11:22,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:22,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:22,699 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:22,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-21 16:11:22,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:22,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 16:11:22,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:23,138 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:23,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:23,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637974242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:23,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:23,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 34 [2022-11-21 16:11:23,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415918739] [2022-11-21 16:11:23,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:23,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 16:11:23,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:23,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 16:11:23,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 16:11:23,335 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:24,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:24,045 INFO L93 Difference]: Finished difference Result 187 states and 200 transitions. [2022-11-21 16:11:24,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-21 16:11:24,045 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 35 [2022-11-21 16:11:24,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:24,046 INFO L225 Difference]: With dead ends: 187 [2022-11-21 16:11:24,046 INFO L226 Difference]: Without dead ends: 162 [2022-11-21 16:11:24,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 15 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=693, Invalid=3089, Unknown=0, NotChecked=0, Total=3782 [2022-11-21 16:11:24,047 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 174 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:24,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 207 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:11:24,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-21 16:11:24,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 49. [2022-11-21 16:11:24,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:24,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-11-21 16:11:24,079 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2022-11-21 16:11:24,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:24,079 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-11-21 16:11:24,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:24,080 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-11-21 16:11:24,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-21 16:11:24,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:24,080 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:24,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-11-21 16:11:24,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-21 16:11:24,285 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:24,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:24,285 INFO L85 PathProgramCache]: Analyzing trace with hash 985723933, now seen corresponding path program 14 times [2022-11-21 16:11:24,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:24,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745447636] [2022-11-21 16:11:24,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:24,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:24,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:24,529 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:24,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:24,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745447636] [2022-11-21 16:11:24,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745447636] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:24,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628556419] [2022-11-21 16:11:24,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:11:24,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:24,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:24,532 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:24,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-21 16:11:24,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:11:24,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:24,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 16:11:24,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:24,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:25,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628556419] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:25,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:25,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 33 [2022-11-21 16:11:25,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445129975] [2022-11-21 16:11:25,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:25,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 16:11:25,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:25,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 16:11:25,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 16:11:25,144 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:25,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:25,819 INFO L93 Difference]: Finished difference Result 213 states and 227 transitions. [2022-11-21 16:11:25,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-21 16:11:25,819 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-21 16:11:25,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:25,820 INFO L225 Difference]: With dead ends: 213 [2022-11-21 16:11:25,820 INFO L226 Difference]: Without dead ends: 188 [2022-11-21 16:11:25,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 15 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1405 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=673, Invalid=2987, Unknown=0, NotChecked=0, Total=3660 [2022-11-21 16:11:25,822 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 208 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:25,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 163 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:25,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-21 16:11:25,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 49. [2022-11-21 16:11:25,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:25,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-11-21 16:11:25,850 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2022-11-21 16:11:25,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:25,850 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-11-21 16:11:25,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:25,850 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-11-21 16:11:25,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-21 16:11:25,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:25,851 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:25,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-21 16:11:26,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:26,051 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:26,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:26,052 INFO L85 PathProgramCache]: Analyzing trace with hash -57119268, now seen corresponding path program 15 times [2022-11-21 16:11:26,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:26,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024621768] [2022-11-21 16:11:26,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:26,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 41 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:26,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:26,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024621768] [2022-11-21 16:11:26,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024621768] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:26,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912240989] [2022-11-21 16:11:26,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:11:26,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:26,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:26,311 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:26,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-21 16:11:26,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-21 16:11:26,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:26,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 16:11:26,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:26,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:26,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912240989] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:26,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:26,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 32 [2022-11-21 16:11:26,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247983925] [2022-11-21 16:11:26,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:26,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-21 16:11:26,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:26,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-21 16:11:26,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-11-21 16:11:26,879 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:27,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:27,535 INFO L93 Difference]: Finished difference Result 238 states and 253 transitions. [2022-11-21 16:11:27,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-21 16:11:27,535 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-21 16:11:27,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:27,536 INFO L225 Difference]: With dead ends: 238 [2022-11-21 16:11:27,536 INFO L226 Difference]: Without dead ends: 213 [2022-11-21 16:11:27,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 42 SyntacticMatches, 15 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=618, Invalid=2688, Unknown=0, NotChecked=0, Total=3306 [2022-11-21 16:11:27,538 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 204 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:27,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 184 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:27,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-11-21 16:11:27,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 49. [2022-11-21 16:11:27,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:27,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-11-21 16:11:27,565 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2022-11-21 16:11:27,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:27,565 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-11-21 16:11:27,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:27,565 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-11-21 16:11:27,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-21 16:11:27,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:27,566 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:27,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-11-21 16:11:27,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-21 16:11:27,766 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:27,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:27,767 INFO L85 PathProgramCache]: Analyzing trace with hash 186335293, now seen corresponding path program 6 times [2022-11-21 16:11:27,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:27,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389487421] [2022-11-21 16:11:27,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:27,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:28,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:28,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389487421] [2022-11-21 16:11:28,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389487421] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:28,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580265615] [2022-11-21 16:11:28,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:11:28,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:28,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:28,017 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:28,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-21 16:11:28,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-21 16:11:28,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:28,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 16:11:28,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:28,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:28,619 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:28,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580265615] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:28,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:28,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 31 [2022-11-21 16:11:28,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435207695] [2022-11-21 16:11:28,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:28,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-21 16:11:28,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:28,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-21 16:11:28,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2022-11-21 16:11:28,621 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:29,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:29,231 INFO L93 Difference]: Finished difference Result 265 states and 282 transitions. [2022-11-21 16:11:29,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-21 16:11:29,231 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 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 35 [2022-11-21 16:11:29,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:29,232 INFO L225 Difference]: With dead ends: 265 [2022-11-21 16:11:29,232 INFO L226 Difference]: Without dead ends: 240 [2022-11-21 16:11:29,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 43 SyntacticMatches, 15 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=545, Invalid=2211, Unknown=0, NotChecked=0, Total=2756 [2022-11-21 16:11:29,233 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 231 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:29,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 184 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:29,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-21 16:11:29,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 51. [2022-11-21 16:11:29,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:29,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2022-11-21 16:11:29,260 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 35 [2022-11-21 16:11:29,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:29,260 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2022-11-21 16:11:29,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:29,261 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2022-11-21 16:11:29,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-21 16:11:29,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:29,261 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:29,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-21 16:11:29,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:29,467 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:29,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:29,468 INFO L85 PathProgramCache]: Analyzing trace with hash 611977303, now seen corresponding path program 12 times [2022-11-21 16:11:29,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:29,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844916947] [2022-11-21 16:11:29,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:29,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:29,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:29,618 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:29,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:29,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844916947] [2022-11-21 16:11:29,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844916947] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:29,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318172679] [2022-11-21 16:11:29,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:11:29,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:29,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:29,620 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:29,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-21 16:11:29,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-21 16:11:29,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:29,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 16:11:29,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:29,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:29,868 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:29,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318172679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:29,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:29,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2022-11-21 16:11:29,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013212339] [2022-11-21 16:11:29,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:29,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-21 16:11:29,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:29,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-21 16:11:29,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-11-21 16:11:29,871 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:30,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:30,086 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2022-11-21 16:11:30,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-21 16:11:30,087 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-21 16:11:30,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:30,088 INFO L225 Difference]: With dead ends: 62 [2022-11-21 16:11:30,088 INFO L226 Difference]: Without dead ends: 60 [2022-11-21 16:11:30,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 62 SyntacticMatches, 14 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2022-11-21 16:11:30,089 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 68 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:30,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 123 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:30,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-21 16:11:30,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2022-11-21 16:11:30,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:30,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-11-21 16:11:30,142 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 36 [2022-11-21 16:11:30,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:30,142 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-11-21 16:11:30,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:30,143 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-11-21 16:11:30,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-21 16:11:30,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:30,143 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:30,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-21 16:11:30,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-21 16:11:30,349 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:30,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:30,350 INFO L85 PathProgramCache]: Analyzing trace with hash -715494727, now seen corresponding path program 13 times [2022-11-21 16:11:30,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:30,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482615550] [2022-11-21 16:11:30,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:30,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:30,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:30,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482615550] [2022-11-21 16:11:30,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482615550] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:30,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230844429] [2022-11-21 16:11:30,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:11:30,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:30,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:30,663 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:30,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-21 16:11:30,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:30,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 16:11:30,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:31,208 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:31,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:31,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230844429] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:31,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:31,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2022-11-21 16:11:31,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282053876] [2022-11-21 16:11:31,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:31,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-21 16:11:31,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:31,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-21 16:11:31,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1323, Unknown=0, NotChecked=0, Total=1640 [2022-11-21 16:11:31,462 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:31,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:31,954 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2022-11-21 16:11:31,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-21 16:11:31,954 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 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 39 [2022-11-21 16:11:31,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:31,955 INFO L225 Difference]: With dead ends: 116 [2022-11-21 16:11:31,955 INFO L226 Difference]: Without dead ends: 88 [2022-11-21 16:11:31,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 17 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=672, Invalid=2750, Unknown=0, NotChecked=0, Total=3422 [2022-11-21 16:11:31,956 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 52 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:31,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 177 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:31,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-21 16:11:31,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 55. [2022-11-21 16:11:31,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:31,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-11-21 16:11:31,989 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2022-11-21 16:11:31,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:31,990 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-11-21 16:11:31,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:31,990 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-11-21 16:11:31,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-21 16:11:31,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:31,990 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:31,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-11-21 16:11:32,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:32,191 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:32,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:32,191 INFO L85 PathProgramCache]: Analyzing trace with hash -944261768, now seen corresponding path program 16 times [2022-11-21 16:11:32,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:32,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091916614] [2022-11-21 16:11:32,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:32,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:32,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:32,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091916614] [2022-11-21 16:11:32,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091916614] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:32,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215204679] [2022-11-21 16:11:32,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:11:32,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:32,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:32,490 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:32,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-21 16:11:32,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:11:32,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:32,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 16:11:32,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:33,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:33,263 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:33,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215204679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:33,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:33,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 40 [2022-11-21 16:11:33,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873890647] [2022-11-21 16:11:33,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:33,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-21 16:11:33,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:33,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-21 16:11:33,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2022-11-21 16:11:33,265 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 40 states, 40 states have (on average 2.0) internal successors, (80), 40 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) [2022-11-21 16:11:33,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:33,946 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2022-11-21 16:11:33,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-21 16:11:33,947 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 40 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 39 [2022-11-21 16:11:33,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:33,948 INFO L225 Difference]: With dead ends: 149 [2022-11-21 16:11:33,948 INFO L226 Difference]: Without dead ends: 121 [2022-11-21 16:11:33,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 42 SyntacticMatches, 17 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1822 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=770, Invalid=3390, Unknown=0, NotChecked=0, Total=4160 [2022-11-21 16:11:33,949 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 108 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:33,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 179 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:33,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-21 16:11:33,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 55. [2022-11-21 16:11:33,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:33,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-11-21 16:11:33,985 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2022-11-21 16:11:33,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:33,985 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-11-21 16:11:33,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 40 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) [2022-11-21 16:11:33,986 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-11-21 16:11:33,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-21 16:11:33,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:33,986 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:33,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-11-21 16:11:34,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-21 16:11:34,187 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:34,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:34,187 INFO L85 PathProgramCache]: Analyzing trace with hash -2060020007, now seen corresponding path program 17 times [2022-11-21 16:11:34,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:34,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393604187] [2022-11-21 16:11:34,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:34,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:34,502 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 58 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:34,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:34,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393604187] [2022-11-21 16:11:34,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393604187] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:34,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452352377] [2022-11-21 16:11:34,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:11:34,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:34,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:34,505 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:34,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-21 16:11:34,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-21 16:11:34,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:34,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 16:11:34,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:35,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:35,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452352377] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:35,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:35,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 39 [2022-11-21 16:11:35,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598084521] [2022-11-21 16:11:35,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:35,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-21 16:11:35,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:35,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-21 16:11:35,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2022-11-21 16:11:35,255 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 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) [2022-11-21 16:11:36,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:36,066 INFO L93 Difference]: Finished difference Result 181 states and 194 transitions. [2022-11-21 16:11:36,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-21 16:11:36,067 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 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 39 [2022-11-21 16:11:36,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:36,068 INFO L225 Difference]: With dead ends: 181 [2022-11-21 16:11:36,068 INFO L226 Difference]: Without dead ends: 153 [2022-11-21 16:11:36,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 43 SyntacticMatches, 17 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=851, Invalid=3841, Unknown=0, NotChecked=0, Total=4692 [2022-11-21 16:11:36,069 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 118 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:36,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 275 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:11:36,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-21 16:11:36,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 55. [2022-11-21 16:11:36,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:36,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-11-21 16:11:36,112 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2022-11-21 16:11:36,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:36,112 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-11-21 16:11:36,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 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) [2022-11-21 16:11:36,112 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-11-21 16:11:36,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-21 16:11:36,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:36,113 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:36,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-11-21 16:11:36,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-21 16:11:36,313 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:36,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:36,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1818917544, now seen corresponding path program 18 times [2022-11-21 16:11:36,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:36,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643828849] [2022-11-21 16:11:36,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:36,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 58 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:36,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:36,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643828849] [2022-11-21 16:11:36,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643828849] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:36,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395612934] [2022-11-21 16:11:36,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:11:36,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:36,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:36,619 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:36,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-21 16:11:36,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-11-21 16:11:36,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:36,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 16:11:36,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:37,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:37,380 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:37,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395612934] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:37,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:37,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 38 [2022-11-21 16:11:37,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379364480] [2022-11-21 16:11:37,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:37,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-21 16:11:37,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:37,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-21 16:11:37,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2022-11-21 16:11:37,383 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 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) [2022-11-21 16:11:38,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:38,231 INFO L93 Difference]: Finished difference Result 212 states and 226 transitions. [2022-11-21 16:11:38,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-21 16:11:38,231 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 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 39 [2022-11-21 16:11:38,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:38,232 INFO L225 Difference]: With dead ends: 212 [2022-11-21 16:11:38,232 INFO L226 Difference]: Without dead ends: 184 [2022-11-21 16:11:38,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 44 SyntacticMatches, 17 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2013 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=894, Invalid=4076, Unknown=0, NotChecked=0, Total=4970 [2022-11-21 16:11:38,239 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 181 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:38,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 195 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:38,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-21 16:11:38,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 55. [2022-11-21 16:11:38,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:38,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-11-21 16:11:38,289 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2022-11-21 16:11:38,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:38,289 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-11-21 16:11:38,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 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) [2022-11-21 16:11:38,290 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-11-21 16:11:38,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-21 16:11:38,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:38,290 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:38,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-11-21 16:11:38,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-21 16:11:38,495 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:38,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:38,495 INFO L85 PathProgramCache]: Analyzing trace with hash 544164601, now seen corresponding path program 19 times [2022-11-21 16:11:38,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:38,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352937322] [2022-11-21 16:11:38,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:38,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:38,791 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 58 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:38,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:38,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352937322] [2022-11-21 16:11:38,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352937322] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:38,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702351170] [2022-11-21 16:11:38,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:11:38,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:38,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:38,794 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:38,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-21 16:11:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:38,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 16:11:38,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:39,262 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:39,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:39,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702351170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:39,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:39,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 37 [2022-11-21 16:11:39,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702852665] [2022-11-21 16:11:39,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:39,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-21 16:11:39,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:39,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-21 16:11:39,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2022-11-21 16:11:39,503 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 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) [2022-11-21 16:11:40,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:40,387 INFO L93 Difference]: Finished difference Result 242 states and 257 transitions. [2022-11-21 16:11:40,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-21 16:11:40,387 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 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 39 [2022-11-21 16:11:40,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:40,388 INFO L225 Difference]: With dead ends: 242 [2022-11-21 16:11:40,388 INFO L226 Difference]: Without dead ends: 214 [2022-11-21 16:11:40,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 45 SyntacticMatches, 17 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1970 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=893, Invalid=4077, Unknown=0, NotChecked=0, Total=4970 [2022-11-21 16:11:40,389 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 225 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:40,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 184 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:40,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-21 16:11:40,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 55. [2022-11-21 16:11:40,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:40,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-11-21 16:11:40,437 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2022-11-21 16:11:40,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:40,437 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-11-21 16:11:40,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 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) [2022-11-21 16:11:40,437 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-11-21 16:11:40,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-21 16:11:40,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:40,438 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:40,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-21 16:11:40,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-21 16:11:40,639 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:40,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:40,639 INFO L85 PathProgramCache]: Analyzing trace with hash -765080264, now seen corresponding path program 20 times [2022-11-21 16:11:40,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:40,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793499144] [2022-11-21 16:11:40,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:40,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 58 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:40,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:40,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793499144] [2022-11-21 16:11:40,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793499144] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:40,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998352715] [2022-11-21 16:11:40,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:11:40,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:40,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:40,931 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:40,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-21 16:11:40,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:11:40,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:40,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 16:11:40,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:41,374 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:41,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:41,607 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:41,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998352715] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:41,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:41,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 36 [2022-11-21 16:11:41,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888866129] [2022-11-21 16:11:41,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:41,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-21 16:11:41,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:41,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-21 16:11:41,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2022-11-21 16:11:41,609 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:42,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:42,539 INFO L93 Difference]: Finished difference Result 271 states and 287 transitions. [2022-11-21 16:11:42,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-21 16:11:42,539 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 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 39 [2022-11-21 16:11:42,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:42,540 INFO L225 Difference]: With dead ends: 271 [2022-11-21 16:11:42,540 INFO L226 Difference]: Without dead ends: 243 [2022-11-21 16:11:42,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 46 SyntacticMatches, 17 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1827 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=848, Invalid=3844, Unknown=0, NotChecked=0, Total=4692 [2022-11-21 16:11:42,542 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 212 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:42,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 237 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:11:42,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-21 16:11:42,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 55. [2022-11-21 16:11:42,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:42,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-11-21 16:11:42,603 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2022-11-21 16:11:42,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:42,604 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-11-21 16:11:42,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:42,604 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-11-21 16:11:42,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-21 16:11:42,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:42,605 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:42,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-21 16:11:42,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:42,811 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:42,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:42,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1686538009, now seen corresponding path program 21 times [2022-11-21 16:11:42,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:42,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141296274] [2022-11-21 16:11:42,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:42,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:43,091 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:43,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:43,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141296274] [2022-11-21 16:11:43,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141296274] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:43,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494918892] [2022-11-21 16:11:43,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:11:43,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:43,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:43,095 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:43,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-21 16:11:43,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-21 16:11:43,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:43,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 16:11:43,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:43,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:43,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494918892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:43,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:43,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 35 [2022-11-21 16:11:43,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871871080] [2022-11-21 16:11:43,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:43,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-21 16:11:43,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:43,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-21 16:11:43,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=963, Unknown=0, NotChecked=0, Total=1190 [2022-11-21 16:11:43,794 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:44,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:44,709 INFO L93 Difference]: Finished difference Result 299 states and 316 transitions. [2022-11-21 16:11:44,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-21 16:11:44,709 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 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 39 [2022-11-21 16:11:44,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:44,710 INFO L225 Difference]: With dead ends: 299 [2022-11-21 16:11:44,710 INFO L226 Difference]: Without dead ends: 271 [2022-11-21 16:11:44,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 47 SyntacticMatches, 17 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1568 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=765, Invalid=3395, Unknown=0, NotChecked=0, Total=4160 [2022-11-21 16:11:44,712 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 257 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:44,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 219 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:44,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-11-21 16:11:44,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 55. [2022-11-21 16:11:44,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:44,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-11-21 16:11:44,764 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2022-11-21 16:11:44,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:44,764 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-11-21 16:11:44,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:44,764 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-11-21 16:11:44,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-21 16:11:44,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:44,765 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:44,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-21 16:11:44,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:44,970 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:44,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:44,971 INFO L85 PathProgramCache]: Analyzing trace with hash 241601816, now seen corresponding path program 7 times [2022-11-21 16:11:44,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:44,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717805243] [2022-11-21 16:11:44,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:44,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:44,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:45,248 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:45,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:45,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717805243] [2022-11-21 16:11:45,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717805243] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:45,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053468273] [2022-11-21 16:11:45,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:11:45,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:45,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:45,250 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:45,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-21 16:11:45,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:45,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 16:11:45,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:45,666 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:45,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:45,881 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:45,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053468273] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:45,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:45,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 34 [2022-11-21 16:11:45,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984296289] [2022-11-21 16:11:45,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:45,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 16:11:45,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:45,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 16:11:45,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 16:11:45,884 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:46,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:46,697 INFO L93 Difference]: Finished difference Result 329 states and 348 transitions. [2022-11-21 16:11:46,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-21 16:11:46,697 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 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 39 [2022-11-21 16:11:46,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:46,699 INFO L225 Difference]: With dead ends: 329 [2022-11-21 16:11:46,699 INFO L226 Difference]: Without dead ends: 301 [2022-11-21 16:11:46,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 48 SyntacticMatches, 17 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=665, Invalid=2757, Unknown=0, NotChecked=0, Total=3422 [2022-11-21 16:11:46,700 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 331 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:46,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 148 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:46,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-11-21 16:11:46,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 57. [2022-11-21 16:11:46,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:46,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-11-21 16:11:46,780 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 39 [2022-11-21 16:11:46,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:46,780 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-11-21 16:11:46,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:46,781 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-11-21 16:11:46,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-21 16:11:46,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:46,781 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:46,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-21 16:11:46,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-21 16:11:46,987 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:46,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:46,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1565543885, now seen corresponding path program 14 times [2022-11-21 16:11:46,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:46,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886133388] [2022-11-21 16:11:46,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:46,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:47,161 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:47,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:47,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886133388] [2022-11-21 16:11:47,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886133388] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:47,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844592319] [2022-11-21 16:11:47,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:11:47,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:47,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:47,163 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:47,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-21 16:11:47,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:11:47,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:47,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-21 16:11:47,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:47,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:47,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844592319] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:47,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:47,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2022-11-21 16:11:47,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269672810] [2022-11-21 16:11:47,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:47,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 16:11:47,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:47,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 16:11:47,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:11:47,408 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:47,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:47,683 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2022-11-21 16:11:47,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-21 16:11:47,685 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 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 40 [2022-11-21 16:11:47,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:47,686 INFO L225 Difference]: With dead ends: 68 [2022-11-21 16:11:47,686 INFO L226 Difference]: Without dead ends: 66 [2022-11-21 16:11:47,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 69 SyntacticMatches, 16 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:11:47,687 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 78 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:47,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 149 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:47,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-21 16:11:47,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2022-11-21 16:11:47,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:47,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-11-21 16:11:47,741 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 40 [2022-11-21 16:11:47,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:47,741 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-11-21 16:11:47,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:47,742 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-11-21 16:11:47,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-21 16:11:47,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:47,742 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:47,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-21 16:11:47,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:47,943 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:47,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:47,943 INFO L85 PathProgramCache]: Analyzing trace with hash -63167651, now seen corresponding path program 15 times [2022-11-21 16:11:47,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:47,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031747872] [2022-11-21 16:11:47,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:47,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:47,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:48,291 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:48,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:48,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031747872] [2022-11-21 16:11:48,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031747872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:48,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861290676] [2022-11-21 16:11:48,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:11:48,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:48,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:48,293 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:48,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-21 16:11:48,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-21 16:11:48,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:48,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-21 16:11:48,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:48,922 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:48,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:49,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861290676] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:49,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:49,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2022-11-21 16:11:49,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214080296] [2022-11-21 16:11:49,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:49,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-21 16:11:49,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:49,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-21 16:11:49,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1599, Unknown=0, NotChecked=0, Total=1980 [2022-11-21 16:11:49,198 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:49,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:49,809 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2022-11-21 16:11:49,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-21 16:11:49,809 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-21 16:11:49,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:49,810 INFO L225 Difference]: With dead ends: 129 [2022-11-21 16:11:49,810 INFO L226 Difference]: Without dead ends: 98 [2022-11-21 16:11:49,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 45 SyntacticMatches, 19 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2013 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=805, Invalid=3355, Unknown=0, NotChecked=0, Total=4160 [2022-11-21 16:11:49,811 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 64 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:49,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 153 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:49,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-21 16:11:49,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2022-11-21 16:11:49,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:49,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-11-21 16:11:49,868 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-11-21 16:11:49,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:49,868 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-11-21 16:11:49,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:49,868 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-11-21 16:11:49,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-21 16:11:49,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:49,869 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:49,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-11-21 16:11:50,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:50,070 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:50,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:50,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1788348772, now seen corresponding path program 22 times [2022-11-21 16:11:50,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:50,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972105646] [2022-11-21 16:11:50,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:50,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 78 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:50,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:50,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972105646] [2022-11-21 16:11:50,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972105646] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:50,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176575525] [2022-11-21 16:11:50,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:11:50,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:50,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:50,415 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:50,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-21 16:11:50,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:11:50,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:50,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-21 16:11:50,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:51,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:51,286 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:51,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176575525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:51,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:51,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 44 [2022-11-21 16:11:51,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807230253] [2022-11-21 16:11:51,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:51,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-21 16:11:51,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:51,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-21 16:11:51,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1539, Unknown=0, NotChecked=0, Total=1892 [2022-11-21 16:11:51,288 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:52,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:52,112 INFO L93 Difference]: Finished difference Result 166 states and 179 transitions. [2022-11-21 16:11:52,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-21 16:11:52,112 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-21 16:11:52,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:52,113 INFO L225 Difference]: With dead ends: 166 [2022-11-21 16:11:52,113 INFO L226 Difference]: Without dead ends: 135 [2022-11-21 16:11:52,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 46 SyntacticMatches, 19 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2291 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=934, Invalid=4178, Unknown=0, NotChecked=0, Total=5112 [2022-11-21 16:11:52,114 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 121 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:52,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 178 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:52,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-21 16:11:52,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 61. [2022-11-21 16:11:52,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:52,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-11-21 16:11:52,179 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-11-21 16:11:52,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:52,179 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-11-21 16:11:52,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:52,179 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-11-21 16:11:52,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-21 16:11:52,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:52,180 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:52,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-11-21 16:11:52,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-21 16:11:52,380 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:52,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:52,381 INFO L85 PathProgramCache]: Analyzing trace with hash -874168451, now seen corresponding path program 23 times [2022-11-21 16:11:52,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:52,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174575960] [2022-11-21 16:11:52,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:52,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:52,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 78 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:52,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:52,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174575960] [2022-11-21 16:11:52,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174575960] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:52,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667420914] [2022-11-21 16:11:52,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:11:52,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:52,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:52,724 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:52,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-21 16:11:52,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-21 16:11:52,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:52,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-21 16:11:52,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:53,382 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:53,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:53,703 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:53,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667420914] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:53,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:53,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 43 [2022-11-21 16:11:53,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733562484] [2022-11-21 16:11:53,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:53,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-21 16:11:53,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:53,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-21 16:11:53,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1477, Unknown=0, NotChecked=0, Total=1806 [2022-11-21 16:11:53,705 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:54,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:54,740 INFO L93 Difference]: Finished difference Result 202 states and 216 transitions. [2022-11-21 16:11:54,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-21 16:11:54,741 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-21 16:11:54,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:54,741 INFO L225 Difference]: With dead ends: 202 [2022-11-21 16:11:54,741 INFO L226 Difference]: Without dead ends: 171 [2022-11-21 16:11:54,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 19 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2502 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1048, Invalid=4804, Unknown=0, NotChecked=0, Total=5852 [2022-11-21 16:11:54,742 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 140 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:54,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 230 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:11:54,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-21 16:11:54,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 61. [2022-11-21 16:11:54,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:54,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-11-21 16:11:54,808 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-11-21 16:11:54,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:54,808 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-11-21 16:11:54,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:54,809 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-11-21 16:11:54,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-21 16:11:54,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:54,809 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:54,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-11-21 16:11:55,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-21 16:11:55,011 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:55,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:55,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1675962756, now seen corresponding path program 24 times [2022-11-21 16:11:55,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:55,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519541131] [2022-11-21 16:11:55,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:55,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:55,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:55,330 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:55,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:55,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519541131] [2022-11-21 16:11:55,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519541131] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:55,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407491638] [2022-11-21 16:11:55,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:11:55,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:55,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:55,332 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:55,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-21 16:11:55,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-21 16:11:55,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:55,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-21 16:11:55,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:55,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:56,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407491638] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:56,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:56,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 42 [2022-11-21 16:11:56,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256693682] [2022-11-21 16:11:56,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:56,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-21 16:11:56,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:56,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-21 16:11:56,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2022-11-21 16:11:56,232 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:57,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:57,350 INFO L93 Difference]: Finished difference Result 237 states and 252 transitions. [2022-11-21 16:11:57,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-21 16:11:57,350 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-21 16:11:57,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:57,351 INFO L225 Difference]: With dead ends: 237 [2022-11-21 16:11:57,352 INFO L226 Difference]: Without dead ends: 206 [2022-11-21 16:11:57,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 48 SyntacticMatches, 19 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2618 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1122, Invalid=5198, Unknown=0, NotChecked=0, Total=6320 [2022-11-21 16:11:57,353 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 200 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:57,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 202 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:11:57,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-21 16:11:57,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 61. [2022-11-21 16:11:57,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:57,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-11-21 16:11:57,454 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-11-21 16:11:57,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:57,454 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-11-21 16:11:57,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:57,454 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-11-21 16:11:57,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-21 16:11:57,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:57,455 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:57,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-21 16:11:57,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-21 16:11:57,661 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:11:57,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:57,661 INFO L85 PathProgramCache]: Analyzing trace with hash -177806435, now seen corresponding path program 25 times [2022-11-21 16:11:57,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:57,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463496921] [2022-11-21 16:11:57,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:57,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:57,989 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:57,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:57,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463496921] [2022-11-21 16:11:57,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463496921] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:57,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55359004] [2022-11-21 16:11:57,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:11:57,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:57,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:57,993 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:58,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-21 16:11:58,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:58,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-21 16:11:58,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 100 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:58,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:58,849 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 100 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:58,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55359004] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:58,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:58,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 41 [2022-11-21 16:11:58,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050552816] [2022-11-21 16:11:58,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:58,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-21 16:11:58,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:58,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-21 16:11:58,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1347, Unknown=0, NotChecked=0, Total=1640 [2022-11-21 16:11:58,851 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:00,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:00,033 INFO L93 Difference]: Finished difference Result 271 states and 287 transitions. [2022-11-21 16:12:00,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-21 16:12:00,033 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-21 16:12:00,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:00,035 INFO L225 Difference]: With dead ends: 271 [2022-11-21 16:12:00,035 INFO L226 Difference]: Without dead ends: 240 [2022-11-21 16:12:00,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 19 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1147, Invalid=5333, Unknown=0, NotChecked=0, Total=6480 [2022-11-21 16:12:00,036 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 232 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:00,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 195 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:12:00,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-21 16:12:00,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 61. [2022-11-21 16:12:00,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:00,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-11-21 16:12:00,128 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-11-21 16:12:00,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:00,129 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-11-21 16:12:00,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:00,129 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-11-21 16:12:00,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-21 16:12:00,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:00,129 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:00,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-21 16:12:00,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-21 16:12:00,330 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:00,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:00,330 INFO L85 PathProgramCache]: Analyzing trace with hash -406573476, now seen corresponding path program 26 times [2022-11-21 16:12:00,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:00,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559052132] [2022-11-21 16:12:00,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:00,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:00,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:00,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559052132] [2022-11-21 16:12:00,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559052132] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:12:00,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092272814] [2022-11-21 16:12:00,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:12:00,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:00,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:00,631 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:00,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-21 16:12:00,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:12:00,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:12:00,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-21 16:12:00,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:01,198 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:01,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:01,478 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:01,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092272814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:01,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:12:01,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 40 [2022-11-21 16:12:01,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211525016] [2022-11-21 16:12:01,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:01,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-21 16:12:01,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:01,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-21 16:12:01,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1279, Unknown=0, NotChecked=0, Total=1560 [2022-11-21 16:12:01,480 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:02,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:02,672 INFO L93 Difference]: Finished difference Result 304 states and 321 transitions. [2022-11-21 16:12:02,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-21 16:12:02,672 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-21 16:12:02,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:02,673 INFO L225 Difference]: With dead ends: 304 [2022-11-21 16:12:02,673 INFO L226 Difference]: Without dead ends: 273 [2022-11-21 16:12:02,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 50 SyntacticMatches, 19 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2526 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1120, Invalid=5200, Unknown=0, NotChecked=0, Total=6320 [2022-11-21 16:12:02,674 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 304 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:02,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 227 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:12:02,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-11-21 16:12:02,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 61. [2022-11-21 16:12:02,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:02,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-11-21 16:12:02,766 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-11-21 16:12:02,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:02,766 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-11-21 16:12:02,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:02,766 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-11-21 16:12:02,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-21 16:12:02,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:02,767 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:02,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-21 16:12:02,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-21 16:12:02,967 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:02,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:02,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1522331715, now seen corresponding path program 27 times [2022-11-21 16:12:02,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:02,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613789319] [2022-11-21 16:12:02,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:02,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 78 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:03,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:03,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613789319] [2022-11-21 16:12:03,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613789319] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:12:03,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56986793] [2022-11-21 16:12:03,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:12:03,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:03,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:03,290 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:03,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-21 16:12:03,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-21 16:12:03,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:12:03,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-21 16:12:03,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:03,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:04,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56986793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:04,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:12:04,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 39 [2022-11-21 16:12:04,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048198955] [2022-11-21 16:12:04,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:04,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-21 16:12:04,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:04,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-21 16:12:04,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1209, Unknown=0, NotChecked=0, Total=1482 [2022-11-21 16:12:04,104 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:05,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:05,390 INFO L93 Difference]: Finished difference Result 336 states and 354 transitions. [2022-11-21 16:12:05,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-21 16:12:05,390 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-21 16:12:05,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:05,392 INFO L225 Difference]: With dead ends: 336 [2022-11-21 16:12:05,392 INFO L226 Difference]: Without dead ends: 305 [2022-11-21 16:12:05,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 51 SyntacticMatches, 19 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2306 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1044, Invalid=4808, Unknown=0, NotChecked=0, Total=5852 [2022-11-21 16:12:05,393 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 299 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:05,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 206 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:12:05,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-11-21 16:12:05,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 61. [2022-11-21 16:12:05,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:05,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-11-21 16:12:05,464 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-11-21 16:12:05,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:05,464 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-11-21 16:12:05,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:05,465 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-11-21 16:12:05,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-21 16:12:05,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:05,465 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:05,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-21 16:12:05,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:05,667 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:05,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:05,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1281229252, now seen corresponding path program 28 times [2022-11-21 16:12:05,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:05,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590492553] [2022-11-21 16:12:05,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:05,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:05,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:05,960 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 78 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:05,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:05,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590492553] [2022-11-21 16:12:05,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590492553] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:12:05,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213736546] [2022-11-21 16:12:05,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:12:05,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:05,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:05,962 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:05,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-21 16:12:06,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:12:06,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:12:06,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-21 16:12:06,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:06,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:06,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213736546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:06,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:12:06,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 38 [2022-11-21 16:12:06,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039379228] [2022-11-21 16:12:06,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:06,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-21 16:12:06,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:06,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-21 16:12:06,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2022-11-21 16:12:06,694 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:07,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:07,923 INFO L93 Difference]: Finished difference Result 367 states and 386 transitions. [2022-11-21 16:12:07,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-21 16:12:07,924 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-21 16:12:07,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:07,925 INFO L225 Difference]: With dead ends: 367 [2022-11-21 16:12:07,925 INFO L226 Difference]: Without dead ends: 336 [2022-11-21 16:12:07,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 52 SyntacticMatches, 19 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1957 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=928, Invalid=4184, Unknown=0, NotChecked=0, Total=5112 [2022-11-21 16:12:07,927 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 251 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:07,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 254 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:12:07,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-11-21 16:12:08,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 61. [2022-11-21 16:12:08,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:08,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-11-21 16:12:08,011 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-11-21 16:12:08,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:08,012 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-11-21 16:12:08,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:08,012 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-11-21 16:12:08,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-21 16:12:08,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:08,013 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:08,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-11-21 16:12:08,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-11-21 16:12:08,218 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:08,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:08,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1081852893, now seen corresponding path program 8 times [2022-11-21 16:12:08,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:08,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142535815] [2022-11-21 16:12:08,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:08,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:08,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:08,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:08,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142535815] [2022-11-21 16:12:08,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142535815] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:12:08,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827165607] [2022-11-21 16:12:08,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:12:08,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:08,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:08,544 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:08,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-21 16:12:08,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:12:08,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:12:08,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-21 16:12:08,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:09,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:09,262 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:09,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827165607] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:09,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:12:09,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 37 [2022-11-21 16:12:09,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656128717] [2022-11-21 16:12:09,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:09,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-21 16:12:09,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:09,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-21 16:12:09,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1063, Unknown=0, NotChecked=0, Total=1332 [2022-11-21 16:12:09,264 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:10,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:10,464 INFO L93 Difference]: Finished difference Result 400 states and 421 transitions. [2022-11-21 16:12:10,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-21 16:12:10,465 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-21 16:12:10,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:10,466 INFO L225 Difference]: With dead ends: 400 [2022-11-21 16:12:10,466 INFO L226 Difference]: Without dead ends: 369 [2022-11-21 16:12:10,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 53 SyntacticMatches, 19 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=797, Invalid=3363, Unknown=0, NotChecked=0, Total=4160 [2022-11-21 16:12:10,467 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 334 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:10,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 180 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:12:10,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-11-21 16:12:10,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 63. [2022-11-21 16:12:10,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 62 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:10,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2022-11-21 16:12:10,575 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 43 [2022-11-21 16:12:10,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:10,575 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2022-11-21 16:12:10,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:10,575 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2022-11-21 16:12:10,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-21 16:12:10,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:10,577 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:10,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-11-21 16:12:10,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-11-21 16:12:10,782 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:10,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:10,782 INFO L85 PathProgramCache]: Analyzing trace with hash 105717207, now seen corresponding path program 16 times [2022-11-21 16:12:10,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:10,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619774755] [2022-11-21 16:12:10,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:10,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 36 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:10,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:10,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619774755] [2022-11-21 16:12:10,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619774755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:12:10,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896069545] [2022-11-21 16:12:10,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:12:10,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:10,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:10,983 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:10,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-21 16:12:11,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:12:11,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:12:11,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 16:12:11,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:11,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:11,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896069545] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:11,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:12:11,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2022-11-21 16:12:11,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178742667] [2022-11-21 16:12:11,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:11,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-21 16:12:11,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:11,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-21 16:12:11,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-11-21 16:12:11,259 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:11,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:11,580 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2022-11-21 16:12:11,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-21 16:12:11,581 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-21 16:12:11,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:11,582 INFO L225 Difference]: With dead ends: 74 [2022-11-21 16:12:11,582 INFO L226 Difference]: Without dead ends: 72 [2022-11-21 16:12:11,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 76 SyntacticMatches, 18 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=422, Unknown=0, NotChecked=0, Total=650 [2022-11-21 16:12:11,582 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 66 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:11,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 154 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:12:11,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-21 16:12:11,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2022-11-21 16:12:11,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 65 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) [2022-11-21 16:12:11,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2022-11-21 16:12:11,676 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 44 [2022-11-21 16:12:11,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:11,676 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2022-11-21 16:12:11,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:11,676 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2022-11-21 16:12:11,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-21 16:12:11,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:11,677 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:11,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-11-21 16:12:11,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:11,882 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:11,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:11,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1215128889, now seen corresponding path program 17 times [2022-11-21 16:12:11,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:11,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642585940] [2022-11-21 16:12:11,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:11,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:12,203 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:12,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:12,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642585940] [2022-11-21 16:12:12,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642585940] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:12:12,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929388765] [2022-11-21 16:12:12,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:12:12,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:12,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:12,205 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:12,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-21 16:12:12,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-21 16:12:12,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:12:12,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 16:12:12,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:12,947 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:12,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:13,256 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:13,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929388765] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:13,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:12:13,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-11-21 16:12:13,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776920429] [2022-11-21 16:12:13,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:13,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-21 16:12:13,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:13,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-21 16:12:13,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=1901, Unknown=0, NotChecked=0, Total=2352 [2022-11-21 16:12:13,258 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 49 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:13,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:13,992 INFO L93 Difference]: Finished difference Result 142 states and 155 transitions. [2022-11-21 16:12:13,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-21 16:12:13,992 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 49 states have internal predecessors, (97), 0 states have call successors, (0), 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 47 [2022-11-21 16:12:13,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:13,993 INFO L225 Difference]: With dead ends: 142 [2022-11-21 16:12:13,993 INFO L226 Difference]: Without dead ends: 108 [2022-11-21 16:12:13,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 49 SyntacticMatches, 21 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2453 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=950, Invalid=4020, Unknown=0, NotChecked=0, Total=4970 [2022-11-21 16:12:13,993 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 91 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:13,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 165 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:12:13,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-21 16:12:14,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 67. [2022-11-21 16:12:14,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 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) [2022-11-21 16:12:14,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-11-21 16:12:14,097 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-11-21 16:12:14,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:14,097 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-11-21 16:12:14,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 49 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:14,098 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-11-21 16:12:14,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-21 16:12:14,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:14,098 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:14,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-11-21 16:12:14,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-11-21 16:12:14,304 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:14,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:14,304 INFO L85 PathProgramCache]: Analyzing trace with hash -185630472, now seen corresponding path program 29 times [2022-11-21 16:12:14,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:14,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671068085] [2022-11-21 16:12:14,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:14,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 101 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:14,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:14,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671068085] [2022-11-21 16:12:14,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671068085] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:12:14,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489589359] [2022-11-21 16:12:14,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:12:14,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:14,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:14,675 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:14,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-21 16:12:14,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-21 16:12:14,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:12:14,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 16:12:14,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:15,378 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:15,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:15,707 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:15,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489589359] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:15,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:12:15,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2022-11-21 16:12:15,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862130804] [2022-11-21 16:12:15,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:15,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-21 16:12:15,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:15,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-21 16:12:15,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2022-11-21 16:12:15,710 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:16,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:16,738 INFO L93 Difference]: Finished difference Result 183 states and 197 transitions. [2022-11-21 16:12:16,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-21 16:12:16,738 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 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 47 [2022-11-21 16:12:16,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:16,739 INFO L225 Difference]: With dead ends: 183 [2022-11-21 16:12:16,739 INFO L226 Difference]: Without dead ends: 149 [2022-11-21 16:12:16,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 50 SyntacticMatches, 21 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2813 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1114, Invalid=5048, Unknown=0, NotChecked=0, Total=6162 [2022-11-21 16:12:16,739 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 110 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:16,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 215 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:12:16,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-21 16:12:16,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 67. [2022-11-21 16:12:16,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 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) [2022-11-21 16:12:16,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-11-21 16:12:16,877 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-11-21 16:12:16,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:16,877 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-11-21 16:12:16,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:16,877 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-11-21 16:12:16,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-21 16:12:16,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:16,878 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:16,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-11-21 16:12:17,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-11-21 16:12:17,078 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:17,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:17,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1477742247, now seen corresponding path program 30 times [2022-11-21 16:12:17,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:17,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419143661] [2022-11-21 16:12:17,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:17,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 101 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:17,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:17,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419143661] [2022-11-21 16:12:17,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419143661] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:12:17,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209226221] [2022-11-21 16:12:17,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:12:17,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:17,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:17,390 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:17,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-21 16:12:17,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-11-21 16:12:17,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:12:17,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 16:12:17,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:18,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:18,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209226221] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:18,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:12:18,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 47 [2022-11-21 16:12:18,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044902368] [2022-11-21 16:12:18,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:18,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-21 16:12:18,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:18,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-21 16:12:18,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1769, Unknown=0, NotChecked=0, Total=2162 [2022-11-21 16:12:18,385 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:19,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:19,590 INFO L93 Difference]: Finished difference Result 223 states and 238 transitions. [2022-11-21 16:12:19,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-21 16:12:19,590 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 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 47 [2022-11-21 16:12:19,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:19,591 INFO L225 Difference]: With dead ends: 223 [2022-11-21 16:12:19,591 INFO L226 Difference]: Without dead ends: 189 [2022-11-21 16:12:19,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 51 SyntacticMatches, 21 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3107 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1266, Invalid=5874, Unknown=0, NotChecked=0, Total=7140 [2022-11-21 16:12:19,592 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 129 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:19,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 232 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:12:19,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-21 16:12:19,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 67. [2022-11-21 16:12:19,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 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) [2022-11-21 16:12:19,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-11-21 16:12:19,682 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-11-21 16:12:19,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:19,682 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-11-21 16:12:19,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:19,683 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-11-21 16:12:19,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-21 16:12:19,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:19,683 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:19,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-11-21 16:12:19,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:19,889 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:19,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:19,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1519423272, now seen corresponding path program 31 times [2022-11-21 16:12:19,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:19,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025416390] [2022-11-21 16:12:19,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:19,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:20,223 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 101 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:20,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:20,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025416390] [2022-11-21 16:12:20,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025416390] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:12:20,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219928251] [2022-11-21 16:12:20,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:12:20,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:20,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:20,225 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:20,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-21 16:12:20,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:20,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 16:12:20,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:20,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:21,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219928251] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:21,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:12:21,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 46 [2022-11-21 16:12:21,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085810674] [2022-11-21 16:12:21,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:21,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-21 16:12:21,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:21,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-21 16:12:21,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1700, Unknown=0, NotChecked=0, Total=2070 [2022-11-21 16:12:21,151 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:22,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:22,565 INFO L93 Difference]: Finished difference Result 262 states and 278 transitions. [2022-11-21 16:12:22,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-21 16:12:22,565 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 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 47 [2022-11-21 16:12:22,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:22,566 INFO L225 Difference]: With dead ends: 262 [2022-11-21 16:12:22,567 INFO L226 Difference]: Without dead ends: 228 [2022-11-21 16:12:22,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 52 SyntacticMatches, 21 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3302 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1377, Invalid=6455, Unknown=0, NotChecked=0, Total=7832 [2022-11-21 16:12:22,568 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 171 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:22,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 257 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:12:22,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-11-21 16:12:22,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 67. [2022-11-21 16:12:22,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 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) [2022-11-21 16:12:22,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-11-21 16:12:22,673 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-11-21 16:12:22,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:22,673 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-11-21 16:12:22,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:22,674 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-11-21 16:12:22,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-21 16:12:22,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:22,674 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:22,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-11-21 16:12:22,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-11-21 16:12:22,875 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:22,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:22,875 INFO L85 PathProgramCache]: Analyzing trace with hash 834536825, now seen corresponding path program 32 times [2022-11-21 16:12:22,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:22,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729218775] [2022-11-21 16:12:22,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:22,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:22,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 101 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:23,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:23,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729218775] [2022-11-21 16:12:23,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729218775] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:12:23,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092082122] [2022-11-21 16:12:23,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:12:23,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:23,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:23,175 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:23,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-21 16:12:23,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:12:23,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:12:23,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 16:12:23,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:23,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:24,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092082122] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:24,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:12:24,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 45 [2022-11-21 16:12:24,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163237485] [2022-11-21 16:12:24,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:24,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-21 16:12:24,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:24,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-21 16:12:24,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1629, Unknown=0, NotChecked=0, Total=1980 [2022-11-21 16:12:24,085 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:25,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:25,588 INFO L93 Difference]: Finished difference Result 300 states and 317 transitions. [2022-11-21 16:12:25,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-21 16:12:25,588 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 0 states have call successors, (0), 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 47 [2022-11-21 16:12:25,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:25,590 INFO L225 Difference]: With dead ends: 300 [2022-11-21 16:12:25,590 INFO L226 Difference]: Without dead ends: 266 [2022-11-21 16:12:25,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 53 SyntacticMatches, 21 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3383 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1435, Invalid=6755, Unknown=0, NotChecked=0, Total=8190 [2022-11-21 16:12:25,591 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 246 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:25,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 256 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:12:25,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-21 16:12:25,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 67. [2022-11-21 16:12:25,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 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) [2022-11-21 16:12:25,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-11-21 16:12:25,697 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-11-21 16:12:25,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:25,697 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-11-21 16:12:25,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:25,697 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-11-21 16:12:25,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-21 16:12:25,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:25,698 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:25,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-11-21 16:12:25,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-11-21 16:12:25,899 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:25,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:25,899 INFO L85 PathProgramCache]: Analyzing trace with hash -890644296, now seen corresponding path program 33 times [2022-11-21 16:12:25,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:25,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226945444] [2022-11-21 16:12:25,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:25,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:26,226 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 101 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:26,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:26,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226945444] [2022-11-21 16:12:26,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226945444] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:12:26,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994793660] [2022-11-21 16:12:26,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:12:26,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:26,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:26,230 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:26,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-21 16:12:26,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-21 16:12:26,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:12:26,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 16:12:26,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:26,822 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:26,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:27,112 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:27,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994793660] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:27,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:12:27,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 44 [2022-11-21 16:12:27,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696355534] [2022-11-21 16:12:27,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:27,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-21 16:12:27,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:27,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-21 16:12:27,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=1556, Unknown=0, NotChecked=0, Total=1892 [2022-11-21 16:12:27,114 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:28,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:28,743 INFO L93 Difference]: Finished difference Result 337 states and 355 transitions. [2022-11-21 16:12:28,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-21 16:12:28,743 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2022-11-21 16:12:28,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:28,744 INFO L225 Difference]: With dead ends: 337 [2022-11-21 16:12:28,744 INFO L226 Difference]: Without dead ends: 303 [2022-11-21 16:12:28,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 54 SyntacticMatches, 21 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3336 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1434, Invalid=6756, Unknown=0, NotChecked=0, Total=8190 [2022-11-21 16:12:28,745 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 267 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:28,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 236 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:12:28,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-11-21 16:12:28,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 67. [2022-11-21 16:12:28,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 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) [2022-11-21 16:12:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-11-21 16:12:28,839 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-11-21 16:12:28,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:28,840 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-11-21 16:12:28,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:28,840 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-11-21 16:12:28,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-21 16:12:28,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:28,840 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:28,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-11-21 16:12:29,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-11-21 16:12:29,043 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:29,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:29,043 INFO L85 PathProgramCache]: Analyzing trace with hash 23536025, now seen corresponding path program 34 times [2022-11-21 16:12:29,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:29,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069422879] [2022-11-21 16:12:29,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:29,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:29,399 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 101 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:29,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:29,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069422879] [2022-11-21 16:12:29,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069422879] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:12:29,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833601772] [2022-11-21 16:12:29,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:12:29,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:29,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:29,401 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:29,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-21 16:12:29,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:12:29,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:12:29,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 16:12:29,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:30,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:30,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833601772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:30,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:12:30,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 43 [2022-11-21 16:12:30,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426409945] [2022-11-21 16:12:30,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:30,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-21 16:12:30,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:30,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-21 16:12:30,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1481, Unknown=0, NotChecked=0, Total=1806 [2022-11-21 16:12:30,305 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:31,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:31,940 INFO L93 Difference]: Finished difference Result 373 states and 392 transitions. [2022-11-21 16:12:31,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-21 16:12:31,940 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 0 states have call successors, (0), 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 47 [2022-11-21 16:12:31,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:31,941 INFO L225 Difference]: With dead ends: 373 [2022-11-21 16:12:31,941 INFO L226 Difference]: Without dead ends: 339 [2022-11-21 16:12:31,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 55 SyntacticMatches, 21 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3155 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1374, Invalid=6458, Unknown=0, NotChecked=0, Total=7832 [2022-11-21 16:12:31,941 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 269 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:31,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 247 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:12:31,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-11-21 16:12:32,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 67. [2022-11-21 16:12:32,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 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) [2022-11-21 16:12:32,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-11-21 16:12:32,034 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-11-21 16:12:32,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:32,034 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-11-21 16:12:32,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:32,034 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-11-21 16:12:32,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-21 16:12:32,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:32,035 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:32,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-11-21 16:12:32,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:32,235 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:32,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:32,236 INFO L85 PathProgramCache]: Analyzing trace with hash -778258280, now seen corresponding path program 35 times [2022-11-21 16:12:32,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:32,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929140234] [2022-11-21 16:12:32,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:32,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:32,573 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 101 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:32,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:32,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929140234] [2022-11-21 16:12:32,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929140234] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:12:32,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918004834] [2022-11-21 16:12:32,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:12:32,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:32,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:32,575 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:32,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-21 16:12:32,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-21 16:12:32,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:12:32,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 16:12:32,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:33,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:33,456 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:33,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918004834] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:33,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:12:33,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 42 [2022-11-21 16:12:33,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728648938] [2022-11-21 16:12:33,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:33,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-21 16:12:33,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:33,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-21 16:12:33,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1404, Unknown=0, NotChecked=0, Total=1722 [2022-11-21 16:12:33,458 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:35,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:35,140 INFO L93 Difference]: Finished difference Result 408 states and 428 transitions. [2022-11-21 16:12:35,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-21 16:12:35,140 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-21 16:12:35,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:35,142 INFO L225 Difference]: With dead ends: 408 [2022-11-21 16:12:35,142 INFO L226 Difference]: Without dead ends: 374 [2022-11-21 16:12:35,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 56 SyntacticMatches, 21 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2842 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1261, Invalid=5879, Unknown=0, NotChecked=0, Total=7140 [2022-11-21 16:12:35,143 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 287 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:35,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 265 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:12:35,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-11-21 16:12:35,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 67. [2022-11-21 16:12:35,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 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) [2022-11-21 16:12:35,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-11-21 16:12:35,255 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-11-21 16:12:35,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:35,255 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-11-21 16:12:35,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:35,255 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-11-21 16:12:35,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-21 16:12:35,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:35,256 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:35,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-11-21 16:12:35,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:35,456 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:35,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:35,457 INFO L85 PathProgramCache]: Analyzing trace with hash 719898041, now seen corresponding path program 36 times [2022-11-21 16:12:35,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:35,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097708542] [2022-11-21 16:12:35,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:35,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:35,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:35,762 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 101 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:35,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:35,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097708542] [2022-11-21 16:12:35,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097708542] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:12:35,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359978572] [2022-11-21 16:12:35,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:12:35,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:35,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:35,764 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:35,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-21 16:12:35,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-11-21 16:12:35,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:12:35,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 16:12:35,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:36,329 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:36,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:36,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359978572] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:36,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:12:36,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 41 [2022-11-21 16:12:36,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881346161] [2022-11-21 16:12:36,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:36,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-21 16:12:36,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:36,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-21 16:12:36,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1325, Unknown=0, NotChecked=0, Total=1640 [2022-11-21 16:12:36,640 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:38,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:38,337 INFO L93 Difference]: Finished difference Result 442 states and 463 transitions. [2022-11-21 16:12:38,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-21 16:12:38,337 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 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 47 [2022-11-21 16:12:38,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:38,338 INFO L225 Difference]: With dead ends: 442 [2022-11-21 16:12:38,338 INFO L226 Difference]: Without dead ends: 408 [2022-11-21 16:12:38,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 57 SyntacticMatches, 21 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2389 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1107, Invalid=5055, Unknown=0, NotChecked=0, Total=6162 [2022-11-21 16:12:38,339 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 338 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:38,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 236 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:12:38,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-11-21 16:12:38,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 67. [2022-11-21 16:12:38,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 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) [2022-11-21 16:12:38,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-11-21 16:12:38,450 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-11-21 16:12:38,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:38,450 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-11-21 16:12:38,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:38,450 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-11-21 16:12:38,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-21 16:12:38,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:38,451 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:38,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-11-21 16:12:38,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:38,654 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:38,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:38,654 INFO L85 PathProgramCache]: Analyzing trace with hash 491131000, now seen corresponding path program 9 times [2022-11-21 16:12:38,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:38,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780460838] [2022-11-21 16:12:38,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:38,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:38,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:38,968 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:38,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:38,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780460838] [2022-11-21 16:12:38,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780460838] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:12:38,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809153700] [2022-11-21 16:12:38,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:12:38,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:38,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:38,970 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:38,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-21 16:12:39,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-21 16:12:39,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:12:39,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 16:12:39,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:39,492 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:39,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:39,777 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:39,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809153700] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:39,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:12:39,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 40 [2022-11-21 16:12:39,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60493854] [2022-11-21 16:12:39,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:39,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-21 16:12:39,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:39,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-21 16:12:39,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1244, Unknown=0, NotChecked=0, Total=1560 [2022-11-21 16:12:39,780 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 40 states, 40 states have (on average 2.2) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:41,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:41,388 INFO L93 Difference]: Finished difference Result 478 states and 501 transitions. [2022-11-21 16:12:41,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-21 16:12:41,389 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 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 47 [2022-11-21 16:12:41,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:41,391 INFO L225 Difference]: With dead ends: 478 [2022-11-21 16:12:41,391 INFO L226 Difference]: Without dead ends: 444 [2022-11-21 16:12:41,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 58 SyntacticMatches, 21 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1871 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=941, Invalid=4029, Unknown=0, NotChecked=0, Total=4970 [2022-11-21 16:12:41,392 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 438 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:41,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 211 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:12:41,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-11-21 16:12:41,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 69. [2022-11-21 16:12:41,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 68 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:41,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2022-11-21 16:12:41,516 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 47 [2022-11-21 16:12:41,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:41,516 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2022-11-21 16:12:41,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:41,517 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2022-11-21 16:12:41,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-21 16:12:41,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:41,517 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:41,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-11-21 16:12:41,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:41,718 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:41,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:41,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1809280333, now seen corresponding path program 18 times [2022-11-21 16:12:41,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:41,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347376130] [2022-11-21 16:12:41,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:41,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:41,877 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 45 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:41,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:41,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347376130] [2022-11-21 16:12:41,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347376130] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:12:41,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024258005] [2022-11-21 16:12:41,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:12:41,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:41,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:41,879 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:41,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-21 16:12:41,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-11-21 16:12:41,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:12:41,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-21 16:12:41,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:42,023 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:42,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:42,189 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:42,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024258005] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:42,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:12:42,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 16 [2022-11-21 16:12:42,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710314049] [2022-11-21 16:12:42,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:42,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 16:12:42,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:42,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 16:12:42,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-11-21 16:12:42,192 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:42,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:42,616 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2022-11-21 16:12:42,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-21 16:12:42,616 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 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 48 [2022-11-21 16:12:42,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:42,617 INFO L225 Difference]: With dead ends: 80 [2022-11-21 16:12:42,617 INFO L226 Difference]: Without dead ends: 78 [2022-11-21 16:12:42,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 83 SyntacticMatches, 20 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2022-11-21 16:12:42,618 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 92 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:42,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 182 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:12:42,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-21 16:12:42,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2022-11-21 16:12:42,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 71 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:42,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2022-11-21 16:12:42,733 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 48 [2022-11-21 16:12:42,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:42,733 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2022-11-21 16:12:42,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:42,733 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2022-11-21 16:12:42,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-21 16:12:42,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:42,734 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:42,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-11-21 16:12:42,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:42,935 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:42,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:42,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1574007517, now seen corresponding path program 19 times [2022-11-21 16:12:42,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:42,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547707702] [2022-11-21 16:12:42,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:42,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:43,331 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:43,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:43,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547707702] [2022-11-21 16:12:43,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547707702] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:12:43,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290237077] [2022-11-21 16:12:43,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:12:43,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:43,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:43,333 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:43,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-21 16:12:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:43,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-21 16:12:43,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:44,113 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:44,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:44,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290237077] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:44,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:12:44,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2022-11-21 16:12:44,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353085252] [2022-11-21 16:12:44,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:44,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-21 16:12:44,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:44,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-21 16:12:44,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=2229, Unknown=0, NotChecked=0, Total=2756 [2022-11-21 16:12:44,471 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 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) [2022-11-21 16:12:45,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:45,392 INFO L93 Difference]: Finished difference Result 155 states and 169 transitions. [2022-11-21 16:12:45,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-21 16:12:45,393 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 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 51 [2022-11-21 16:12:45,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:45,393 INFO L225 Difference]: With dead ends: 155 [2022-11-21 16:12:45,393 INFO L226 Difference]: Without dead ends: 118 [2022-11-21 16:12:45,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 53 SyntacticMatches, 23 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2936 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1107, Invalid=4745, Unknown=0, NotChecked=0, Total=5852 [2022-11-21 16:12:45,394 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 75 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:45,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 188 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:12:45,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-21 16:12:45,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 73. [2022-11-21 16:12:45,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:45,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-11-21 16:12:45,599 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-11-21 16:12:45,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:45,599 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-11-21 16:12:45,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 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) [2022-11-21 16:12:45,600 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-11-21 16:12:45,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-21 16:12:45,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:45,600 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:45,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-11-21 16:12:45,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:45,806 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:45,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:45,807 INFO L85 PathProgramCache]: Analyzing trace with hash -2142136548, now seen corresponding path program 37 times [2022-11-21 16:12:45,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:45,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117951475] [2022-11-21 16:12:45,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:45,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:45,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 127 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:46,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:46,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117951475] [2022-11-21 16:12:46,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117951475] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:12:46,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974402649] [2022-11-21 16:12:46,158 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:12:46,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:46,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:46,167 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:46,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-11-21 16:12:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:46,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-21 16:12:46,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:46,940 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:46,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:47,332 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:47,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974402649] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:47,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:12:47,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 52 [2022-11-21 16:12:47,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855591618] [2022-11-21 16:12:47,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:47,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-21 16:12:47,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:47,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-21 16:12:47,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=2159, Unknown=0, NotChecked=0, Total=2652 [2022-11-21 16:12:47,334 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 52 states, 52 states have (on average 2.0) internal successors, (104), 52 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) [2022-11-21 16:12:48,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:48,614 INFO L93 Difference]: Finished difference Result 200 states and 215 transitions. [2022-11-21 16:12:48,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-21 16:12:48,614 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 52 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 51 [2022-11-21 16:12:48,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:48,615 INFO L225 Difference]: With dead ends: 200 [2022-11-21 16:12:48,615 INFO L226 Difference]: Without dead ends: 163 [2022-11-21 16:12:48,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 54 SyntacticMatches, 23 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3388 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1310, Invalid=6000, Unknown=0, NotChecked=0, Total=7310 [2022-11-21 16:12:48,616 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 123 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:48,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 215 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:12:48,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-21 16:12:48,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 73. [2022-11-21 16:12:48,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:48,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-11-21 16:12:48,768 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-11-21 16:12:48,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:48,768 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-11-21 16:12:48,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 52 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) [2022-11-21 16:12:48,768 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-11-21 16:12:48,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-21 16:12:48,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:48,769 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:48,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-11-21 16:12:48,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-11-21 16:12:48,969 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:48,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:48,969 INFO L85 PathProgramCache]: Analyzing trace with hash 2032955133, now seen corresponding path program 38 times [2022-11-21 16:12:48,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:48,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617401429] [2022-11-21 16:12:48,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:48,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:48,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:49,322 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 127 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:49,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:49,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617401429] [2022-11-21 16:12:49,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617401429] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:12:49,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236909003] [2022-11-21 16:12:49,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:12:49,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:49,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:49,325 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:49,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-11-21 16:12:49,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:12:49,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:12:49,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-21 16:12:49,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:50,067 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:50,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:50,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236909003] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:50,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:12:50,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 51 [2022-11-21 16:12:50,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816913273] [2022-11-21 16:12:50,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:50,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-21 16:12:50,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:50,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-21 16:12:50,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=2087, Unknown=0, NotChecked=0, Total=2550 [2022-11-21 16:12:50,411 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 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) [2022-11-21 16:12:51,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:51,932 INFO L93 Difference]: Finished difference Result 244 states and 260 transitions. [2022-11-21 16:12:51,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-21 16:12:51,932 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 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 51 [2022-11-21 16:12:51,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:51,933 INFO L225 Difference]: With dead ends: 244 [2022-11-21 16:12:51,933 INFO L226 Difference]: Without dead ends: 207 [2022-11-21 16:12:51,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 55 SyntacticMatches, 23 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3777 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1505, Invalid=7051, Unknown=0, NotChecked=0, Total=8556 [2022-11-21 16:12:51,933 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 200 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:51,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 280 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:12:51,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-21 16:12:52,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 73. [2022-11-21 16:12:52,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:52,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-11-21 16:12:52,077 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-11-21 16:12:52,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:52,078 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-11-21 16:12:52,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 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) [2022-11-21 16:12:52,078 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-11-21 16:12:52,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-21 16:12:52,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:52,078 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:52,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-11-21 16:12:52,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-11-21 16:12:52,279 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:52,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:52,279 INFO L85 PathProgramCache]: Analyzing trace with hash 227972860, now seen corresponding path program 39 times [2022-11-21 16:12:52,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:52,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119649787] [2022-11-21 16:12:52,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:52,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:52,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 127 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:52,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:52,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119649787] [2022-11-21 16:12:52,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119649787] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:12:52,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111800750] [2022-11-21 16:12:52,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:12:52,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:52,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:52,683 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:52,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-11-21 16:12:52,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-21 16:12:52,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:12:52,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-21 16:12:52,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:53,401 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:53,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:53,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111800750] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:53,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:12:53,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 50 [2022-11-21 16:12:53,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560392157] [2022-11-21 16:12:53,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:53,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-21 16:12:53,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:53,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-21 16:12:53,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=2013, Unknown=0, NotChecked=0, Total=2450 [2022-11-21 16:12:53,737 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 50 states, 50 states have (on average 2.04) internal successors, (102), 50 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) [2022-11-21 16:12:55,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:55,540 INFO L93 Difference]: Finished difference Result 287 states and 304 transitions. [2022-11-21 16:12:55,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-21 16:12:55,540 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 50 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 51 [2022-11-21 16:12:55,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:55,542 INFO L225 Difference]: With dead ends: 287 [2022-11-21 16:12:55,542 INFO L226 Difference]: Without dead ends: 250 [2022-11-21 16:12:55,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 56 SyntacticMatches, 23 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4065 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1659, Invalid=7847, Unknown=0, NotChecked=0, Total=9506 [2022-11-21 16:12:55,543 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 188 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:55,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 258 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:12:55,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-11-21 16:12:55,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 73. [2022-11-21 16:12:55,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:55,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-11-21 16:12:55,731 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-11-21 16:12:55,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:55,732 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-11-21 16:12:55,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 50 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) [2022-11-21 16:12:55,732 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-11-21 16:12:55,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-21 16:12:55,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:55,732 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:55,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-11-21 16:12:55,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-11-21 16:12:55,933 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:55,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:55,933 INFO L85 PathProgramCache]: Analyzing trace with hash -245894371, now seen corresponding path program 40 times [2022-11-21 16:12:55,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:55,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905611491] [2022-11-21 16:12:55,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:55,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:56,277 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 127 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:56,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:56,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905611491] [2022-11-21 16:12:56,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905611491] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:12:56,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582817863] [2022-11-21 16:12:56,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:12:56,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:56,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:56,280 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:56,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-11-21 16:12:56,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:12:56,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:12:56,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-21 16:12:56,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:56,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:57,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582817863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:57,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:12:57,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 49 [2022-11-21 16:12:57,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661549011] [2022-11-21 16:12:57,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:57,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-21 16:12:57,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:57,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-21 16:12:57,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=1937, Unknown=0, NotChecked=0, Total=2352 [2022-11-21 16:12:57,301 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:59,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:59,306 INFO L93 Difference]: Finished difference Result 329 states and 347 transitions. [2022-11-21 16:12:59,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-21 16:12:59,307 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 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 51 [2022-11-21 16:12:59,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:59,307 INFO L225 Difference]: With dead ends: 329 [2022-11-21 16:12:59,307 INFO L226 Difference]: Without dead ends: 292 [2022-11-21 16:12:59,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 57 SyntacticMatches, 23 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4232 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1757, Invalid=8343, Unknown=0, NotChecked=0, Total=10100 [2022-11-21 16:12:59,308 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 233 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:59,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 302 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:12:59,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-11-21 16:12:59,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 73. [2022-11-21 16:12:59,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:59,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-11-21 16:12:59,459 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-11-21 16:12:59,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:59,459 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-11-21 16:12:59,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:59,459 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-11-21 16:12:59,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-21 16:12:59,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:59,460 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:59,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-11-21 16:12:59,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-11-21 16:12:59,663 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:59,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:59,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1646653732, now seen corresponding path program 41 times [2022-11-21 16:12:59,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:59,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476366813] [2022-11-21 16:12:59,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:59,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:59,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:13:00,002 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 127 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:00,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:13:00,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476366813] [2022-11-21 16:13:00,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476366813] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:13:00,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518432898] [2022-11-21 16:13:00,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:13:00,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:13:00,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:13:00,003 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:13:00,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-11-21 16:13:00,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-11-21 16:13:00,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:13:00,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-21 16:13:00,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:13:00,726 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 155 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:00,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:13:01,066 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 155 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:01,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518432898] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:13:01,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:13:01,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 48 [2022-11-21 16:13:01,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312762052] [2022-11-21 16:13:01,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:13:01,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-21 16:13:01,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:13:01,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-21 16:13:01,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1859, Unknown=0, NotChecked=0, Total=2256 [2022-11-21 16:13:01,068 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 48 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:03,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:13:03,222 INFO L93 Difference]: Finished difference Result 370 states and 389 transitions. [2022-11-21 16:13:03,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-21 16:13:03,222 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 48 states have internal predecessors, (100), 0 states have call successors, (0), 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 51 [2022-11-21 16:13:03,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:13:03,223 INFO L225 Difference]: With dead ends: 370 [2022-11-21 16:13:03,223 INFO L226 Difference]: Without dead ends: 333 [2022-11-21 16:13:03,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 58 SyntacticMatches, 23 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4258 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1790, Invalid=8512, Unknown=0, NotChecked=0, Total=10302 [2022-11-21 16:13:03,224 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 314 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:13:03,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 270 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:13:03,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-11-21 16:13:03,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 73. [2022-11-21 16:13:03,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:03,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-11-21 16:13:03,371 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-11-21 16:13:03,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:13:03,371 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-11-21 16:13:03,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 48 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:03,371 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-11-21 16:13:03,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-21 16:13:03,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:13:03,372 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:13:03,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-11-21 16:13:03,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-11-21 16:13:03,575 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:13:03,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:13:03,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1356201789, now seen corresponding path program 42 times [2022-11-21 16:13:03,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:13:03,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234651436] [2022-11-21 16:13:03,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:13:03,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:13:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:13:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 127 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:03,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:13:03,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234651436] [2022-11-21 16:13:03,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234651436] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:13:03,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100079134] [2022-11-21 16:13:03,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:13:03,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:13:03,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:13:03,926 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:13:03,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-21 16:13:03,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-11-21 16:13:03,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:13:03,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-21 16:13:03,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:13:04,604 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:04,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:13:04,949 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:04,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100079134] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:13:04,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:13:04,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 47 [2022-11-21 16:13:04,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552794734] [2022-11-21 16:13:04,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:13:04,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-21 16:13:04,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:13:04,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-21 16:13:04,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=1779, Unknown=0, NotChecked=0, Total=2162 [2022-11-21 16:13:04,950 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:07,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:13:07,208 INFO L93 Difference]: Finished difference Result 410 states and 430 transitions. [2022-11-21 16:13:07,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-21 16:13:07,208 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 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 51 [2022-11-21 16:13:07,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:13:07,209 INFO L225 Difference]: With dead ends: 410 [2022-11-21 16:13:07,209 INFO L226 Difference]: Without dead ends: 373 [2022-11-21 16:13:07,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 59 SyntacticMatches, 23 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4134 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1755, Invalid=8345, Unknown=0, NotChecked=0, Total=10100 [2022-11-21 16:13:07,210 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 293 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:13:07,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 238 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:13:07,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-11-21 16:13:07,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 73. [2022-11-21 16:13:07,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:07,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-11-21 16:13:07,368 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-11-21 16:13:07,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:13:07,368 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-11-21 16:13:07,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:07,368 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-11-21 16:13:07,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-21 16:13:07,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:13:07,369 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:13:07,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-11-21 16:13:07,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:13:07,569 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:13:07,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:13:07,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1314520764, now seen corresponding path program 43 times [2022-11-21 16:13:07,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:13:07,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033101090] [2022-11-21 16:13:07,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:13:07,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:13:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:13:07,903 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 127 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:07,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:13:07,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033101090] [2022-11-21 16:13:07,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033101090] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:13:07,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563925516] [2022-11-21 16:13:07,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:13:07,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:13:07,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:13:07,904 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:13:07,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-21 16:13:07,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:13:07,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-21 16:13:07,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:13:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:08,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:13:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:08,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563925516] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:13:08,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:13:08,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 46 [2022-11-21 16:13:08,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934101020] [2022-11-21 16:13:08,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:13:08,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-21 16:13:08,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:13:08,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-21 16:13:08,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1697, Unknown=0, NotChecked=0, Total=2070 [2022-11-21 16:13:08,866 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:11,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:13:11,146 INFO L93 Difference]: Finished difference Result 449 states and 470 transitions. [2022-11-21 16:13:11,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-21 16:13:11,146 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 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 51 [2022-11-21 16:13:11,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:13:11,147 INFO L225 Difference]: With dead ends: 449 [2022-11-21 16:13:11,147 INFO L226 Difference]: Without dead ends: 412 [2022-11-21 16:13:11,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 60 SyntacticMatches, 23 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3857 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1655, Invalid=7851, Unknown=0, NotChecked=0, Total=9506 [2022-11-21 16:13:11,148 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 417 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:13:11,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 281 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:13:11,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-11-21 16:13:11,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 73. [2022-11-21 16:13:11,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:11,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-11-21 16:13:11,306 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-11-21 16:13:11,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:13:11,306 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-11-21 16:13:11,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:11,306 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-11-21 16:13:11,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-21 16:13:11,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:13:11,306 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:13:11,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-11-21 16:13:11,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:13:11,507 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:13:11,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:13:11,507 INFO L85 PathProgramCache]: Analyzing trace with hash -626486435, now seen corresponding path program 44 times [2022-11-21 16:13:11,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:13:11,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393113700] [2022-11-21 16:13:11,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:13:11,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:13:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:13:11,841 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 127 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:11,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:13:11,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393113700] [2022-11-21 16:13:11,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393113700] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:13:11,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277237406] [2022-11-21 16:13:11,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:13:11,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:13:11,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:13:11,842 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:13:11,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-11-21 16:13:11,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:13:11,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:13:11,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-21 16:13:11,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:13:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:12,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:13:12,773 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:12,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277237406] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:13:12,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:13:12,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 45 [2022-11-21 16:13:12,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164289335] [2022-11-21 16:13:12,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:13:12,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-21 16:13:12,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:13:12,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-21 16:13:12,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1613, Unknown=0, NotChecked=0, Total=1980 [2022-11-21 16:13:12,775 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:15,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:13:15,126 INFO L93 Difference]: Finished difference Result 487 states and 509 transitions. [2022-11-21 16:13:15,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-21 16:13:15,126 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 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 51 [2022-11-21 16:13:15,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:13:15,127 INFO L225 Difference]: With dead ends: 487 [2022-11-21 16:13:15,127 INFO L226 Difference]: Without dead ends: 450 [2022-11-21 16:13:15,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 61 SyntacticMatches, 23 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3435 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1499, Invalid=7057, Unknown=0, NotChecked=0, Total=8556 [2022-11-21 16:13:15,128 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 404 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:13:15,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 323 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:13:15,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-11-21 16:13:15,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 73. [2022-11-21 16:13:15,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:15,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-11-21 16:13:15,289 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-11-21 16:13:15,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:13:15,289 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-11-21 16:13:15,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:15,289 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-11-21 16:13:15,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-21 16:13:15,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:13:15,290 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:13:15,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-11-21 16:13:15,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:13:15,490 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:13:15,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:13:15,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1943299740, now seen corresponding path program 45 times [2022-11-21 16:13:15,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:13:15,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129589683] [2022-11-21 16:13:15,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:13:15,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:13:15,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:13:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 127 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:15,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:13:15,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129589683] [2022-11-21 16:13:15,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129589683] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:13:15,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216991460] [2022-11-21 16:13:15,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:13:15,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:13:15,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:13:15,856 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:13:15,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-11-21 16:13:15,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-21 16:13:15,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:13:15,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-21 16:13:15,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:13:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:16,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:13:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:16,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216991460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:13:16,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:13:16,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 44 [2022-11-21 16:13:16,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902187019] [2022-11-21 16:13:16,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:13:16,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-21 16:13:16,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:13:16,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-21 16:13:16,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1527, Unknown=0, NotChecked=0, Total=1892 [2022-11-21 16:13:16,777 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:19,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:13:19,110 INFO L93 Difference]: Finished difference Result 524 states and 547 transitions. [2022-11-21 16:13:19,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-21 16:13:19,110 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 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 51 [2022-11-21 16:13:19,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:13:19,111 INFO L225 Difference]: With dead ends: 524 [2022-11-21 16:13:19,111 INFO L226 Difference]: Without dead ends: 487 [2022-11-21 16:13:19,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 62 SyntacticMatches, 23 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2864 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1302, Invalid=6008, Unknown=0, NotChecked=0, Total=7310 [2022-11-21 16:13:19,112 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 453 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:13:19,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 287 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:13:19,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-11-21 16:13:19,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 73. [2022-11-21 16:13:19,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:19,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-11-21 16:13:19,277 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-11-21 16:13:19,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:13:19,278 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-11-21 16:13:19,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:19,278 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-11-21 16:13:19,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-21 16:13:19,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:13:19,278 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:13:19,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-11-21 16:13:19,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-11-21 16:13:19,479 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:13:19,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:13:19,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1437487235, now seen corresponding path program 10 times [2022-11-21 16:13:19,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:13:19,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209822407] [2022-11-21 16:13:19,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:13:19,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:13:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:13:19,820 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:19,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:13:19,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209822407] [2022-11-21 16:13:19,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209822407] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:13:19,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994709174] [2022-11-21 16:13:19,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:13:19,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:13:19,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:13:19,822 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:13:19,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-21 16:13:19,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:13:19,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:13:19,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-21 16:13:19,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:13:20,401 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:20,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:13:20,725 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:20,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994709174] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:13:20,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:13:20,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 43 [2022-11-21 16:13:20,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933450346] [2022-11-21 16:13:20,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:13:20,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-21 16:13:20,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:13:20,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-21 16:13:20,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1439, Unknown=0, NotChecked=0, Total=1806 [2022-11-21 16:13:20,727 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:23,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:13:23,047 INFO L93 Difference]: Finished difference Result 563 states and 588 transitions. [2022-11-21 16:13:23,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-21 16:13:23,047 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 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 51 [2022-11-21 16:13:23,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:13:23,048 INFO L225 Difference]: With dead ends: 563 [2022-11-21 16:13:23,048 INFO L226 Difference]: Without dead ends: 526 [2022-11-21 16:13:23,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 63 SyntacticMatches, 23 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2229 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1097, Invalid=4755, Unknown=0, NotChecked=0, Total=5852 [2022-11-21 16:13:23,049 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 364 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:13:23,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 266 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:13:23,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-11-21 16:13:23,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 75. [2022-11-21 16:13:23,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 74 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:23,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2022-11-21 16:13:23,222 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 51 [2022-11-21 16:13:23,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:13:23,222 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2022-11-21 16:13:23,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:23,223 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2022-11-21 16:13:23,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-21 16:13:23,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:13:23,223 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:13:23,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-11-21 16:13:23,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-11-21 16:13:23,425 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:13:23,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:13:23,426 INFO L85 PathProgramCache]: Analyzing trace with hash -723168425, now seen corresponding path program 20 times [2022-11-21 16:13:23,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:13:23,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521610118] [2022-11-21 16:13:23,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:13:23,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:13:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:13:23,619 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 55 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:23,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:13:23,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521610118] [2022-11-21 16:13:23,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521610118] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:13:23,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889601349] [2022-11-21 16:13:23,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:13:23,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:13:23,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:13:23,621 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:13:23,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-11-21 16:13:23,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:13:23,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:13:23,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-21 16:13:23,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:13:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:23,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:13:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:23,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889601349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:13:23,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:13:23,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 17 [2022-11-21 16:13:23,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517773400] [2022-11-21 16:13:23,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:13:23,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-21 16:13:23,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:13:23,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-21 16:13:23,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2022-11-21 16:13:23,968 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:24,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:13:24,499 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2022-11-21 16:13:24,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-21 16:13:24,500 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 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 52 [2022-11-21 16:13:24,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:13:24,500 INFO L225 Difference]: With dead ends: 86 [2022-11-21 16:13:24,500 INFO L226 Difference]: Without dead ends: 84 [2022-11-21 16:13:24,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 90 SyntacticMatches, 22 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2022-11-21 16:13:24,501 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 100 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:13:24,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 168 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:13:24,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-21 16:13:24,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2022-11-21 16:13:24,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 77 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:24,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2022-11-21 16:13:24,683 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 52 [2022-11-21 16:13:24,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:13:24,683 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2022-11-21 16:13:24,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:24,683 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2022-11-21 16:13:24,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-21 16:13:24,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:13:24,684 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:13:24,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-11-21 16:13:24,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-11-21 16:13:24,884 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:13:24,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:13:24,885 INFO L85 PathProgramCache]: Analyzing trace with hash -349749319, now seen corresponding path program 21 times [2022-11-21 16:13:24,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:13:24,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722532403] [2022-11-21 16:13:24,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:13:24,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:13:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:13:25,291 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:25,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:13:25,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722532403] [2022-11-21 16:13:25,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722532403] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:13:25,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717940202] [2022-11-21 16:13:25,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:13:25,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:13:25,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:13:25,293 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:13:25,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-11-21 16:13:25,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-21 16:13:25,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:13:25,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-21 16:13:25,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:13:26,181 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:26,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:13:26,579 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:26,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717940202] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:13:26,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:13:26,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2022-11-21 16:13:26,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118919504] [2022-11-21 16:13:26,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:13:26,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-21 16:13:26,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:13:26,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-21 16:13:26,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=2583, Unknown=0, NotChecked=0, Total=3192 [2022-11-21 16:13:26,581 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:27,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:13:27,730 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2022-11-21 16:13:27,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-21 16:13:27,730 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 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 55 [2022-11-21 16:13:27,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:13:27,731 INFO L225 Difference]: With dead ends: 168 [2022-11-21 16:13:27,731 INFO L226 Difference]: Without dead ends: 128 [2022-11-21 16:13:27,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 57 SyntacticMatches, 25 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3462 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1276, Invalid=5530, Unknown=0, NotChecked=0, Total=6806 [2022-11-21 16:13:27,731 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:13:27,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 218 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:13:27,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-21 16:13:27,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 79. [2022-11-21 16:13:27,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:27,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-11-21 16:13:27,915 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-11-21 16:13:27,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:13:27,915 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-11-21 16:13:27,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:27,916 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-11-21 16:13:27,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-21 16:13:27,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:13:27,916 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:13:27,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-11-21 16:13:28,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-11-21 16:13:28,117 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:13:28,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:13:28,117 INFO L85 PathProgramCache]: Analyzing trace with hash -865260424, now seen corresponding path program 46 times [2022-11-21 16:13:28,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:13:28,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455972074] [2022-11-21 16:13:28,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:13:28,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:13:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:13:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 156 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:28,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:13:28,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455972074] [2022-11-21 16:13:28,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455972074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:13:28,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762642154] [2022-11-21 16:13:28,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:13:28,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:13:28,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:13:28,521 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:13:28,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-11-21 16:13:28,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:13:28,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:13:28,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-21 16:13:28,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:13:29,365 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:29,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:13:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:29,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762642154] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:13:29,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:13:29,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 56 [2022-11-21 16:13:29,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458320211] [2022-11-21 16:13:29,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:13:29,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-21 16:13:29,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:13:29,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-21 16:13:29,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=2508, Unknown=0, NotChecked=0, Total=3080 [2022-11-21 16:13:29,763 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 56 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:31,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:13:31,330 INFO L93 Difference]: Finished difference Result 217 states and 233 transitions. [2022-11-21 16:13:31,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-21 16:13:31,330 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 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 55 [2022-11-21 16:13:31,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:13:31,331 INFO L225 Difference]: With dead ends: 217 [2022-11-21 16:13:31,331 INFO L226 Difference]: Without dead ends: 177 [2022-11-21 16:13:31,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 25 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4016 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1522, Invalid=7034, Unknown=0, NotChecked=0, Total=8556 [2022-11-21 16:13:31,332 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 129 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:13:31,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 227 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:13:31,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-21 16:13:31,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 79. [2022-11-21 16:13:31,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:31,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-11-21 16:13:31,536 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-11-21 16:13:31,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:13:31,537 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-11-21 16:13:31,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:31,537 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-11-21 16:13:31,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-21 16:13:31,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:13:31,537 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:13:31,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-11-21 16:13:31,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:13:31,738 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:13:31,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:13:31,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1436079143, now seen corresponding path program 47 times [2022-11-21 16:13:31,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:13:31,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238012948] [2022-11-21 16:13:31,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:13:31,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:13:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:13:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 156 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:32,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:13:32,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238012948] [2022-11-21 16:13:32,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238012948] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:13:32,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9057682] [2022-11-21 16:13:32,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:13:32,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:13:32,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:13:32,135 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:13:32,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-11-21 16:13:32,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-21 16:13:32,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:13:32,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-21 16:13:32,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:13:32,967 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:32,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:13:33,348 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:33,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9057682] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:13:33,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:13:33,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 55 [2022-11-21 16:13:33,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824261037] [2022-11-21 16:13:33,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:13:33,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-21 16:13:33,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:13:33,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-21 16:13:33,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=2431, Unknown=0, NotChecked=0, Total=2970 [2022-11-21 16:13:33,350 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:35,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:13:35,355 INFO L93 Difference]: Finished difference Result 265 states and 282 transitions. [2022-11-21 16:13:35,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-21 16:13:35,355 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 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 55 [2022-11-21 16:13:35,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:13:35,356 INFO L225 Difference]: With dead ends: 265 [2022-11-21 16:13:35,356 INFO L226 Difference]: Without dead ends: 225 [2022-11-21 16:13:35,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 59 SyntacticMatches, 25 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4512 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1765, Invalid=8335, Unknown=0, NotChecked=0, Total=10100 [2022-11-21 16:13:35,357 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 141 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:13:35,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 304 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:13:35,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-21 16:13:35,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 79. [2022-11-21 16:13:35,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:35,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-11-21 16:13:35,571 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-11-21 16:13:35,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:13:35,571 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-11-21 16:13:35,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:35,571 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-11-21 16:13:35,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-21 16:13:35,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:13:35,572 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:13:35,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-11-21 16:13:35,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-11-21 16:13:35,772 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:13:35,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:13:35,773 INFO L85 PathProgramCache]: Analyzing trace with hash 762264664, now seen corresponding path program 48 times [2022-11-21 16:13:35,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:13:35,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32449417] [2022-11-21 16:13:35,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:13:35,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:13:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:13:36,164 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 156 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:36,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:13:36,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32449417] [2022-11-21 16:13:36,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32449417] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:13:36,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116703775] [2022-11-21 16:13:36,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:13:36,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:13:36,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:13:36,166 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:13:36,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-11-21 16:13:36,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-11-21 16:13:36,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:13:36,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-21 16:13:36,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:13:36,980 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:36,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:13:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:37,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116703775] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:13:37,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:13:37,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 54 [2022-11-21 16:13:37,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807191513] [2022-11-21 16:13:37,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:13:37,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-21 16:13:37,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:13:37,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-21 16:13:37,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=2352, Unknown=0, NotChecked=0, Total=2862 [2022-11-21 16:13:37,356 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 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) [2022-11-21 16:13:39,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:13:39,688 INFO L93 Difference]: Finished difference Result 312 states and 330 transitions. [2022-11-21 16:13:39,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-21 16:13:39,688 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 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 55 [2022-11-21 16:13:39,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:13:39,689 INFO L225 Difference]: With dead ends: 312 [2022-11-21 16:13:39,689 INFO L226 Difference]: Without dead ends: 272 [2022-11-21 16:13:39,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 60 SyntacticMatches, 25 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4907 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1968, Invalid=9374, Unknown=0, NotChecked=0, Total=11342 [2022-11-21 16:13:39,690 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 190 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:13:39,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 286 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:13:39,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-21 16:13:39,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 79. [2022-11-21 16:13:39,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:39,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-11-21 16:13:39,903 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-11-21 16:13:39,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:13:39,903 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-11-21 16:13:39,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 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) [2022-11-21 16:13:39,903 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-11-21 16:13:39,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-21 16:13:39,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:13:39,904 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:13:39,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-11-21 16:13:40,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:13:40,104 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:13:40,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:13:40,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1525915641, now seen corresponding path program 49 times [2022-11-21 16:13:40,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:13:40,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534354986] [2022-11-21 16:13:40,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:13:40,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:13:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:13:40,493 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 156 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:40,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:13:40,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534354986] [2022-11-21 16:13:40,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534354986] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:13:40,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929309416] [2022-11-21 16:13:40,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:13:40,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:13:40,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:13:40,494 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:13:40,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-11-21 16:13:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:13:40,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-21 16:13:40,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:13:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:41,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:13:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:41,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929309416] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:13:41,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:13:41,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 53 [2022-11-21 16:13:41,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930055505] [2022-11-21 16:13:41,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:13:41,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-21 16:13:41,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:13:41,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-21 16:13:41,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=2271, Unknown=0, NotChecked=0, Total=2756 [2022-11-21 16:13:41,636 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:44,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:13:44,276 INFO L93 Difference]: Finished difference Result 358 states and 377 transitions. [2022-11-21 16:13:44,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-21 16:13:44,276 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 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 55 [2022-11-21 16:13:44,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:13:44,277 INFO L225 Difference]: With dead ends: 358 [2022-11-21 16:13:44,277 INFO L226 Difference]: Without dead ends: 318 [2022-11-21 16:13:44,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 61 SyntacticMatches, 25 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5176 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2113, Invalid=10097, Unknown=0, NotChecked=0, Total=12210 [2022-11-21 16:13:44,278 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 325 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:13:44,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 331 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:13:44,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-11-21 16:13:44,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 79. [2022-11-21 16:13:44,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:44,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-11-21 16:13:44,491 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-11-21 16:13:44,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:13:44,491 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-11-21 16:13:44,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:44,491 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-11-21 16:13:44,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-21 16:13:44,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:13:44,492 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:13:44,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-11-21 16:13:44,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:13:44,695 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:13:44,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:13:44,695 INFO L85 PathProgramCache]: Analyzing trace with hash 2104738872, now seen corresponding path program 50 times [2022-11-21 16:13:44,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:13:44,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800710661] [2022-11-21 16:13:44,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:13:44,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:13:44,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:13:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 156 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:45,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:13:45,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800710661] [2022-11-21 16:13:45,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800710661] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:13:45,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936468626] [2022-11-21 16:13:45,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:13:45,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:13:45,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:13:45,099 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:13:45,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-11-21 16:13:45,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:13:45,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:13:45,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-21 16:13:45,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:13:45,856 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:45,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:13:46,240 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:46,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936468626] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:13:46,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:13:46,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 52 [2022-11-21 16:13:46,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999171617] [2022-11-21 16:13:46,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:13:46,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-21 16:13:46,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:13:46,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-21 16:13:46,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=2188, Unknown=0, NotChecked=0, Total=2652 [2022-11-21 16:13:46,242 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 52 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:49,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:13:49,201 INFO L93 Difference]: Finished difference Result 403 states and 423 transitions. [2022-11-21 16:13:49,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-21 16:13:49,201 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 52 states have internal predecessors, (108), 0 states have call successors, (0), 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 55 [2022-11-21 16:13:49,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:13:49,202 INFO L225 Difference]: With dead ends: 403 [2022-11-21 16:13:49,202 INFO L226 Difference]: Without dead ends: 363 [2022-11-21 16:13:49,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 62 SyntacticMatches, 25 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5293 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2188, Invalid=10468, Unknown=0, NotChecked=0, Total=12656 [2022-11-21 16:13:49,203 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 287 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:13:49,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 300 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:13:49,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-11-21 16:13:49,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 79. [2022-11-21 16:13:49,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:49,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-11-21 16:13:49,452 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-11-21 16:13:49,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:13:49,452 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-11-21 16:13:49,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 52 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:49,452 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-11-21 16:13:49,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-21 16:13:49,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:13:49,453 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:13:49,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-11-21 16:13:49,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:13:49,654 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:13:49,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:13:49,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1984863257, now seen corresponding path program 51 times [2022-11-21 16:13:49,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:13:49,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381404171] [2022-11-21 16:13:49,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:13:49,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:13:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:13:50,084 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 156 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:50,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:13:50,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381404171] [2022-11-21 16:13:50,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381404171] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:13:50,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363922963] [2022-11-21 16:13:50,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:13:50,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:13:50,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:13:50,087 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:13:50,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-11-21 16:13:50,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-21 16:13:50,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:13:50,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-21 16:13:50,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:13:50,914 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:50,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:13:51,334 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:51,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363922963] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:13:51,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:13:51,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 51 [2022-11-21 16:13:51,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619640172] [2022-11-21 16:13:51,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:13:51,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-21 16:13:51,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:13:51,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-21 16:13:51,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=2103, Unknown=0, NotChecked=0, Total=2550 [2022-11-21 16:13:51,336 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:54,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:13:54,680 INFO L93 Difference]: Finished difference Result 447 states and 468 transitions. [2022-11-21 16:13:54,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-21 16:13:54,680 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 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 55 [2022-11-21 16:13:54,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:13:54,682 INFO L225 Difference]: With dead ends: 447 [2022-11-21 16:13:54,682 INFO L226 Difference]: Without dead ends: 407 [2022-11-21 16:13:54,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 63 SyntacticMatches, 25 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5244 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2187, Invalid=10469, Unknown=0, NotChecked=0, Total=12656 [2022-11-21 16:13:54,683 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 329 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:13:54,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 324 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:13:54,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-11-21 16:13:54,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 79. [2022-11-21 16:13:54,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:54,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-11-21 16:13:54,923 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-11-21 16:13:54,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:13:54,924 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-11-21 16:13:54,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:54,924 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-11-21 16:13:54,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-21 16:13:54,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:13:54,925 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:13:54,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-11-21 16:13:55,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-11-21 16:13:55,130 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:13:55,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:13:55,131 INFO L85 PathProgramCache]: Analyzing trace with hash 179880984, now seen corresponding path program 52 times [2022-11-21 16:13:55,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:13:55,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650193193] [2022-11-21 16:13:55,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:13:55,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:13:55,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:13:55,569 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 156 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:55,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:13:55,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650193193] [2022-11-21 16:13:55,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650193193] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:13:55,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825690337] [2022-11-21 16:13:55,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:13:55,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:13:55,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:13:55,571 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:13:55,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-11-21 16:13:55,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:13:55,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:13:55,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-21 16:13:55,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:13:56,355 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:56,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:13:56,754 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:56,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825690337] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:13:56,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:13:56,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 50 [2022-11-21 16:13:56,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098763368] [2022-11-21 16:13:56,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:13:56,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-21 16:13:56,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:13:56,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-21 16:13:56,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=2016, Unknown=0, NotChecked=0, Total=2450 [2022-11-21 16:13:56,761 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 50 states, 50 states have (on average 2.12) internal successors, (106), 50 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) [2022-11-21 16:14:00,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:14:00,348 INFO L93 Difference]: Finished difference Result 490 states and 512 transitions. [2022-11-21 16:14:00,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-21 16:14:00,348 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 50 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 55 [2022-11-21 16:14:00,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:14:00,350 INFO L225 Difference]: With dead ends: 490 [2022-11-21 16:14:00,351 INFO L226 Difference]: Without dead ends: 450 [2022-11-21 16:14:00,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 64 SyntacticMatches, 25 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5023 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2110, Invalid=10100, Unknown=0, NotChecked=0, Total=12210 [2022-11-21 16:14:00,352 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 355 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:14:00,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 290 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:14:00,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-11-21 16:14:00,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 79. [2022-11-21 16:14:00,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:00,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-11-21 16:14:00,633 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-11-21 16:14:00,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:14:00,633 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-11-21 16:14:00,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 50 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) [2022-11-21 16:14:00,634 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-11-21 16:14:00,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-21 16:14:00,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:14:00,635 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:14:00,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-11-21 16:14:00,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-11-21 16:14:00,839 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:14:00,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:14:00,839 INFO L85 PathProgramCache]: Analyzing trace with hash -293986247, now seen corresponding path program 53 times [2022-11-21 16:14:00,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:14:00,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999201931] [2022-11-21 16:14:00,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:14:00,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:14:00,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:14:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 156 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:01,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:14:01,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999201931] [2022-11-21 16:14:01,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999201931] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:14:01,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336230118] [2022-11-21 16:14:01,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:14:01,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:14:01,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:14:01,298 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:14:01,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-11-21 16:14:01,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-21 16:14:01,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:14:01,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-21 16:14:01,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:14:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:02,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:14:02,591 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:02,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336230118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:14:02,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:14:02,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 49 [2022-11-21 16:14:02,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414260614] [2022-11-21 16:14:02,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:14:02,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-21 16:14:02,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:14:02,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-21 16:14:02,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1927, Unknown=0, NotChecked=0, Total=2352 [2022-11-21 16:14:02,593 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 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) [2022-11-21 16:14:06,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:14:06,369 INFO L93 Difference]: Finished difference Result 532 states and 555 transitions. [2022-11-21 16:14:06,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-21 16:14:06,369 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 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 55 [2022-11-21 16:14:06,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:14:06,371 INFO L225 Difference]: With dead ends: 532 [2022-11-21 16:14:06,371 INFO L226 Difference]: Without dead ends: 492 [2022-11-21 16:14:06,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 65 SyntacticMatches, 25 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4632 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1963, Invalid=9379, Unknown=0, NotChecked=0, Total=11342 [2022-11-21 16:14:06,372 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 382 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:14:06,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 290 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:14:06,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-11-21 16:14:06,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 79. [2022-11-21 16:14:06,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:06,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-11-21 16:14:06,642 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-11-21 16:14:06,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:14:06,642 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-11-21 16:14:06,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 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) [2022-11-21 16:14:06,643 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-11-21 16:14:06,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-21 16:14:06,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:14:06,643 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:14:06,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-11-21 16:14:06,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:14:06,844 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:14:06,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:14:06,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1694745608, now seen corresponding path program 54 times [2022-11-21 16:14:06,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:14:06,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768879961] [2022-11-21 16:14:06,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:14:06,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:14:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:14:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 156 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:07,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:14:07,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768879961] [2022-11-21 16:14:07,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768879961] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:14:07,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452013726] [2022-11-21 16:14:07,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:14:07,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:14:07,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:14:07,270 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:14:07,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-11-21 16:14:07,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-11-21 16:14:07,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:14:07,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-21 16:14:07,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:14:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:08,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:14:08,455 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:08,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452013726] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:14:08,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:14:08,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 48 [2022-11-21 16:14:08,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105511858] [2022-11-21 16:14:08,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:14:08,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-21 16:14:08,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:14:08,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-21 16:14:08,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2022-11-21 16:14:08,457 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 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) [2022-11-21 16:14:12,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:14:12,246 INFO L93 Difference]: Finished difference Result 573 states and 597 transitions. [2022-11-21 16:14:12,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-21 16:14:12,246 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 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 55 [2022-11-21 16:14:12,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:14:12,247 INFO L225 Difference]: With dead ends: 573 [2022-11-21 16:14:12,247 INFO L226 Difference]: Without dead ends: 533 [2022-11-21 16:14:12,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 66 SyntacticMatches, 25 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4085 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1758, Invalid=8342, Unknown=0, NotChecked=0, Total=10100 [2022-11-21 16:14:12,248 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 414 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:14:12,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 330 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:14:12,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-11-21 16:14:12,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 79. [2022-11-21 16:14:12,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:12,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-11-21 16:14:12,516 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-11-21 16:14:12,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:14:12,516 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-11-21 16:14:12,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 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) [2022-11-21 16:14:12,516 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-11-21 16:14:12,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-21 16:14:12,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:14:12,517 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:14:12,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-11-21 16:14:12,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:14:12,717 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:14:12,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:14:12,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1308109913, now seen corresponding path program 55 times [2022-11-21 16:14:12,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:14:12,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462422793] [2022-11-21 16:14:12,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:14:12,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:14:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:14:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 156 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:13,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:14:13,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462422793] [2022-11-21 16:14:13,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462422793] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:14:13,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24657950] [2022-11-21 16:14:13,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:14:13,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:14:13,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:14:13,119 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:14:13,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-11-21 16:14:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:14:13,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-21 16:14:13,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:14:13,813 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:13,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:14:14,196 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:14,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24657950] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:14:14,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:14:14,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 47 [2022-11-21 16:14:14,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918523966] [2022-11-21 16:14:14,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:14:14,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-21 16:14:14,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:14:14,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-21 16:14:14,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1743, Unknown=0, NotChecked=0, Total=2162 [2022-11-21 16:14:14,197 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 47 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) [2022-11-21 16:14:17,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:14:17,543 INFO L93 Difference]: Finished difference Result 613 states and 638 transitions. [2022-11-21 16:14:17,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-21 16:14:17,543 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 47 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 55 [2022-11-21 16:14:17,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:14:17,544 INFO L225 Difference]: With dead ends: 613 [2022-11-21 16:14:17,544 INFO L226 Difference]: Without dead ends: 573 [2022-11-21 16:14:17,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 67 SyntacticMatches, 25 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3382 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1513, Invalid=7043, Unknown=0, NotChecked=0, Total=8556 [2022-11-21 16:14:17,545 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 377 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:14:17,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 310 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:14:17,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-11-21 16:14:17,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 79. [2022-11-21 16:14:17,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:17,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-11-21 16:14:17,832 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-11-21 16:14:17,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:14:17,833 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-11-21 16:14:17,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 47 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) [2022-11-21 16:14:17,833 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-11-21 16:14:17,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-21 16:14:17,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:14:17,833 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:14:17,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-11-21 16:14:18,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:14:18,034 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:14:18,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:14:18,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1266428888, now seen corresponding path program 11 times [2022-11-21 16:14:18,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:14:18,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168886305] [2022-11-21 16:14:18,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:14:18,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:14:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:14:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:18,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:14:18,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168886305] [2022-11-21 16:14:18,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168886305] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:14:18,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869340665] [2022-11-21 16:14:18,446 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:14:18,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:14:18,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:14:18,447 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:14:18,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-11-21 16:14:18,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-21 16:14:18,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:14:18,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-21 16:14:18,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:14:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:19,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:14:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:19,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869340665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:14:19,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:14:19,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 46 [2022-11-21 16:14:19,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376186907] [2022-11-21 16:14:19,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:14:19,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-21 16:14:19,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:14:19,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-21 16:14:19,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=1648, Unknown=0, NotChecked=0, Total=2070 [2022-11-21 16:14:19,469 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 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) [2022-11-21 16:14:22,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:14:22,939 INFO L93 Difference]: Finished difference Result 655 states and 682 transitions. [2022-11-21 16:14:22,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-21 16:14:22,939 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 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 55 [2022-11-21 16:14:22,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:14:22,940 INFO L225 Difference]: With dead ends: 655 [2022-11-21 16:14:22,940 INFO L226 Difference]: Without dead ends: 615 [2022-11-21 16:14:22,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 68 SyntacticMatches, 25 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2618 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1265, Invalid=5541, Unknown=0, NotChecked=0, Total=6806 [2022-11-21 16:14:22,941 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 405 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:14:22,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 247 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:14:22,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-11-21 16:14:23,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 81. [2022-11-21 16:14:23,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1875) internal successors, (95), 80 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:23,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2022-11-21 16:14:23,291 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 55 [2022-11-21 16:14:23,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:14:23,291 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2022-11-21 16:14:23,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 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) [2022-11-21 16:14:23,291 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2022-11-21 16:14:23,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-21 16:14:23,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:14:23,292 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:14:23,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-11-21 16:14:23,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:14:23,492 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:14:23,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:14:23,492 INFO L85 PathProgramCache]: Analyzing trace with hash -66956493, now seen corresponding path program 22 times [2022-11-21 16:14:23,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:14:23,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307075294] [2022-11-21 16:14:23,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:14:23,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:14:23,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:14:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 66 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:23,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:14:23,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307075294] [2022-11-21 16:14:23,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307075294] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:14:23,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303355081] [2022-11-21 16:14:23,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:14:23,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:14:23,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:14:23,724 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:14:23,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-11-21 16:14:23,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:14:23,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:14:23,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-21 16:14:23,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:14:23,876 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:23,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:14:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:24,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303355081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:14:24,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:14:24,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 18 [2022-11-21 16:14:24,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055427819] [2022-11-21 16:14:24,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:14:24,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 16:14:24,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:14:24,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 16:14:24,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:14:24,118 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:24,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:14:24,814 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2022-11-21 16:14:24,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-21 16:14:24,815 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-21 16:14:24,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:14:24,816 INFO L225 Difference]: With dead ends: 92 [2022-11-21 16:14:24,816 INFO L226 Difference]: Without dead ends: 90 [2022-11-21 16:14:24,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 97 SyntacticMatches, 24 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=641, Unknown=0, NotChecked=0, Total=992 [2022-11-21 16:14:24,816 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 130 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:14:24,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 174 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:14:24,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-21 16:14:25,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2022-11-21 16:14:25,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.180722891566265) internal successors, (98), 83 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:25,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2022-11-21 16:14:25,105 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 56 [2022-11-21 16:14:25,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:14:25,105 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2022-11-21 16:14:25,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:25,105 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2022-11-21 16:14:25,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-21 16:14:25,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:14:25,106 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:14:25,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-11-21 16:14:25,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:14:25,307 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:14:25,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:14:25,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1831214499, now seen corresponding path program 23 times [2022-11-21 16:14:25,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:14:25,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574481202] [2022-11-21 16:14:25,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:14:25,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:14:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:14:25,807 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:25,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:14:25,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574481202] [2022-11-21 16:14:25,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574481202] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:14:25,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012683007] [2022-11-21 16:14:25,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:14:25,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:14:25,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:14:25,811 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:14:25,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-11-21 16:14:25,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-11-21 16:14:25,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:14:25,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-21 16:14:25,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:14:26,840 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:26,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:14:27,308 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:27,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012683007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:14:27,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:14:27,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2022-11-21 16:14:27,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657219211] [2022-11-21 16:14:27,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:14:27,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-21 16:14:27,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:14:27,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-21 16:14:27,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=697, Invalid=2963, Unknown=0, NotChecked=0, Total=3660 [2022-11-21 16:14:27,311 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 61 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:28,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:14:28,891 INFO L93 Difference]: Finished difference Result 181 states and 197 transitions. [2022-11-21 16:14:28,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-21 16:14:28,891 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 61 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-11-21 16:14:28,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:14:28,892 INFO L225 Difference]: With dead ends: 181 [2022-11-21 16:14:28,892 INFO L226 Difference]: Without dead ends: 138 [2022-11-21 16:14:28,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 61 SyntacticMatches, 27 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4031 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1457, Invalid=6375, Unknown=0, NotChecked=0, Total=7832 [2022-11-21 16:14:28,903 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 92 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:14:28,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 217 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:14:28,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-21 16:14:29,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 85. [2022-11-21 16:14:29,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:29,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-11-21 16:14:29,297 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-11-21 16:14:29,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:14:29,297 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-11-21 16:14:29,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 61 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:29,297 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-11-21 16:14:29,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-21 16:14:29,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:14:29,298 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:14:29,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-11-21 16:14:29,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:14:29,498 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:14:29,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:14:29,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1372411804, now seen corresponding path program 56 times [2022-11-21 16:14:29,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:14:29,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205738417] [2022-11-21 16:14:29,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:14:29,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:14:29,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:14:30,003 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 188 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:30,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:14:30,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205738417] [2022-11-21 16:14:30,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205738417] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:14:30,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143658259] [2022-11-21 16:14:30,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:14:30,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:14:30,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:14:30,013 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:14:30,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-11-21 16:14:30,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:14:30,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:14:30,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-21 16:14:30,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:14:31,035 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:31,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:14:31,489 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:31,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143658259] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:14:31,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:14:31,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 60 [2022-11-21 16:14:31,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592754438] [2022-11-21 16:14:31,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:14:31,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-21 16:14:31,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:14:31,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-21 16:14:31,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=657, Invalid=2883, Unknown=0, NotChecked=0, Total=3540 [2022-11-21 16:14:31,492 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 60 states, 60 states have (on average 2.0) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:33,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:14:33,625 INFO L93 Difference]: Finished difference Result 234 states and 251 transitions. [2022-11-21 16:14:33,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-21 16:14:33,625 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 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 59 [2022-11-21 16:14:33,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:14:33,625 INFO L225 Difference]: With dead ends: 234 [2022-11-21 16:14:33,626 INFO L226 Difference]: Without dead ends: 191 [2022-11-21 16:14:33,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 62 SyntacticMatches, 27 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4697 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1750, Invalid=8150, Unknown=0, NotChecked=0, Total=9900 [2022-11-21 16:14:33,626 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 106 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:14:33,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 255 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:14:33,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-21 16:14:33,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 85. [2022-11-21 16:14:33,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:33,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-11-21 16:14:33,934 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-11-21 16:14:33,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:14:33,934 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-11-21 16:14:33,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:33,934 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-11-21 16:14:33,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-21 16:14:33,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:14:33,935 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:14:33,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-11-21 16:14:34,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:14:34,141 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:14:34,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:14:34,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1710834051, now seen corresponding path program 57 times [2022-11-21 16:14:34,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:14:34,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380924410] [2022-11-21 16:14:34,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:14:34,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:14:34,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:14:34,616 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 188 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:34,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:14:34,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380924410] [2022-11-21 16:14:34,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380924410] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:14:34,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906264115] [2022-11-21 16:14:34,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:14:34,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:14:34,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:14:34,618 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:14:34,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-11-21 16:14:34,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-21 16:14:34,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:14:34,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-21 16:14:34,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:14:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:35,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:14:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:36,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906264115] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:14:36,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:14:36,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 59 [2022-11-21 16:14:36,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060389113] [2022-11-21 16:14:36,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:14:36,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-21 16:14:36,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:14:36,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-21 16:14:36,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=2801, Unknown=0, NotChecked=0, Total=3422 [2022-11-21 16:14:36,121 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:38,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:14:38,890 INFO L93 Difference]: Finished difference Result 286 states and 304 transitions. [2022-11-21 16:14:38,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-21 16:14:38,890 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 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 59 [2022-11-21 16:14:38,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:14:38,891 INFO L225 Difference]: With dead ends: 286 [2022-11-21 16:14:38,891 INFO L226 Difference]: Without dead ends: 243 [2022-11-21 16:14:38,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 63 SyntacticMatches, 27 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5312 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2046, Invalid=9726, Unknown=0, NotChecked=0, Total=11772 [2022-11-21 16:14:38,892 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 196 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:14:38,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 238 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:14:38,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-21 16:14:39,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 85. [2022-11-21 16:14:39,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:39,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-11-21 16:14:39,237 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-11-21 16:14:39,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:14:39,237 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-11-21 16:14:39,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:39,237 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-11-21 16:14:39,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-21 16:14:39,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:14:39,238 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:14:39,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-11-21 16:14:39,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:14:39,443 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:14:39,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:14:39,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1099200380, now seen corresponding path program 58 times [2022-11-21 16:14:39,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:14:39,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438051744] [2022-11-21 16:14:39,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:14:39,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:14:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:14:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 188 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:39,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:14:39,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438051744] [2022-11-21 16:14:39,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438051744] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:14:39,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193682361] [2022-11-21 16:14:39,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:14:39,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:14:39,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:14:39,967 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:14:39,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-11-21 16:14:40,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:14:40,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:14:40,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-21 16:14:40,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:14:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:40,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:14:41,415 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:41,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193682361] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:14:41,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:14:41,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 58 [2022-11-21 16:14:41,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753772878] [2022-11-21 16:14:41,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:14:41,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-21 16:14:41,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:14:41,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-21 16:14:41,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=589, Invalid=2717, Unknown=0, NotChecked=0, Total=3306 [2022-11-21 16:14:41,417 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:44,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:14:44,574 INFO L93 Difference]: Finished difference Result 337 states and 356 transitions. [2022-11-21 16:14:44,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-21 16:14:44,575 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 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 59 [2022-11-21 16:14:44,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:14:44,575 INFO L225 Difference]: With dead ends: 337 [2022-11-21 16:14:44,576 INFO L226 Difference]: Without dead ends: 294 [2022-11-21 16:14:44,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 64 SyntacticMatches, 27 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5828 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2304, Invalid=11036, Unknown=0, NotChecked=0, Total=13340 [2022-11-21 16:14:44,577 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 239 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:14:44,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 236 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:14:44,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-11-21 16:14:44,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 85. [2022-11-21 16:14:44,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:44,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-11-21 16:14:44,934 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-11-21 16:14:44,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:14:44,935 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-11-21 16:14:44,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:44,935 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-11-21 16:14:44,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-21 16:14:44,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:14:44,936 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:14:44,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-11-21 16:14:45,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2022-11-21 16:14:45,142 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:14:45,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:14:45,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1996741987, now seen corresponding path program 59 times [2022-11-21 16:14:45,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:14:45,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087635431] [2022-11-21 16:14:45,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:14:45,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:14:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:14:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 188 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:45,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:14:45,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087635431] [2022-11-21 16:14:45,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087635431] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:14:45,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790317815] [2022-11-21 16:14:45,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:14:45,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:14:45,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:14:45,633 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:14:45,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-11-21 16:14:45,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-11-21 16:14:45,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:14:45,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-21 16:14:45,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:14:46,621 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:46,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:14:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:47,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790317815] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:14:47,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:14:47,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 57 [2022-11-21 16:14:47,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377118213] [2022-11-21 16:14:47,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:14:47,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-21 16:14:47,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:14:47,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-21 16:14:47,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=2631, Unknown=0, NotChecked=0, Total=3192 [2022-11-21 16:14:47,083 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:50,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:14:50,800 INFO L93 Difference]: Finished difference Result 387 states and 407 transitions. [2022-11-21 16:14:50,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-21 16:14:50,800 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 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 59 [2022-11-21 16:14:50,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:14:50,801 INFO L225 Difference]: With dead ends: 387 [2022-11-21 16:14:50,801 INFO L226 Difference]: Without dead ends: 344 [2022-11-21 16:14:50,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 65 SyntacticMatches, 27 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2503, Invalid=12017, Unknown=0, NotChecked=0, Total=14520 [2022-11-21 16:14:50,802 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 390 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:14:50,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 262 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:14:50,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-11-21 16:14:51,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 85. [2022-11-21 16:14:51,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:51,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-11-21 16:14:51,200 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-11-21 16:14:51,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:14:51,200 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-11-21 16:14:51,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:51,200 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-11-21 16:14:51,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-21 16:14:51,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:14:51,201 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:14:51,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-11-21 16:14:51,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:14:51,402 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:14:51,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:14:51,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1782714204, now seen corresponding path program 60 times [2022-11-21 16:14:51,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:14:51,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756653542] [2022-11-21 16:14:51,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:14:51,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:14:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:14:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 188 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:51,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:14:51,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756653542] [2022-11-21 16:14:51,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756653542] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:14:51,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997458674] [2022-11-21 16:14:51,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:14:51,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:14:51,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:14:51,870 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:14:51,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-11-21 16:14:51,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-11-21 16:14:51,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:14:51,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-21 16:14:51,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:14:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:52,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:14:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:53,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997458674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:14:53,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:14:53,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 56 [2022-11-21 16:14:53,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630422966] [2022-11-21 16:14:53,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:14:53,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-21 16:14:53,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:14:53,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-21 16:14:53,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=2543, Unknown=0, NotChecked=0, Total=3080 [2022-11-21 16:14:53,284 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:57,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:14:57,637 INFO L93 Difference]: Finished difference Result 436 states and 457 transitions. [2022-11-21 16:14:57,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-21 16:14:57,637 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 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 59 [2022-11-21 16:14:57,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:14:57,639 INFO L225 Difference]: With dead ends: 436 [2022-11-21 16:14:57,639 INFO L226 Difference]: Without dead ends: 393 [2022-11-21 16:14:57,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 66 SyntacticMatches, 27 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6441 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2628, Invalid=12624, Unknown=0, NotChecked=0, Total=15252 [2022-11-21 16:14:57,640 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 345 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:14:57,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 329 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:14:57,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-11-21 16:14:58,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 85. [2022-11-21 16:14:58,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:58,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-11-21 16:14:58,251 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-11-21 16:14:58,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:14:58,252 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-11-21 16:14:58,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:58,252 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-11-21 16:14:58,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-21 16:14:58,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:14:58,253 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:14:58,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-11-21 16:14:58,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:14:58,454 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:14:58,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:14:58,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1211895485, now seen corresponding path program 61 times [2022-11-21 16:14:58,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:14:58,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549961591] [2022-11-21 16:14:58,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:14:58,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:14:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:14:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 188 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:58,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:14:58,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549961591] [2022-11-21 16:14:58,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549961591] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:14:58,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210058307] [2022-11-21 16:14:58,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:14:58,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:14:58,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:14:58,977 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:14:58,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-11-21 16:14:59,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:14:59,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-21 16:14:59,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:14:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 222 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:14:59,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:15:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 222 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:00,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210058307] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:15:00,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:15:00,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 55 [2022-11-21 16:15:00,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351844605] [2022-11-21 16:15:00,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:15:00,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-21 16:15:00,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:15:00,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-21 16:15:00,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2453, Unknown=0, NotChecked=0, Total=2970 [2022-11-21 16:15:00,287 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:04,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:15:04,759 INFO L93 Difference]: Finished difference Result 484 states and 506 transitions. [2022-11-21 16:15:04,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-21 16:15:04,760 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 states have internal predecessors, (115), 0 states have call successors, (0), 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 59 [2022-11-21 16:15:04,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:15:04,761 INFO L225 Difference]: With dead ends: 484 [2022-11-21 16:15:04,761 INFO L226 Difference]: Without dead ends: 441 [2022-11-21 16:15:04,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 67 SyntacticMatches, 27 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6486 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2670, Invalid=12830, Unknown=0, NotChecked=0, Total=15500 [2022-11-21 16:15:04,762 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 387 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:15:04,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 262 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:15:04,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-11-21 16:15:05,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 85. [2022-11-21 16:15:05,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:05,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-11-21 16:15:05,141 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-11-21 16:15:05,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:15:05,141 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-11-21 16:15:05,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:05,141 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-11-21 16:15:05,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-21 16:15:05,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:15:05,142 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:15:05,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-11-21 16:15:05,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-11-21 16:15:05,348 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:15:05,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:15:05,348 INFO L85 PathProgramCache]: Analyzing trace with hash -884728004, now seen corresponding path program 62 times [2022-11-21 16:15:05,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:15:05,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968621498] [2022-11-21 16:15:05,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:15:05,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:15:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:15:05,855 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 188 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:05,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:15:05,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968621498] [2022-11-21 16:15:05,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968621498] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:15:05,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548688447] [2022-11-21 16:15:05,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:15:05,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:15:05,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:15:05,856 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:15:05,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-11-21 16:15:05,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:15:05,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:15:05,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-21 16:15:05,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:15:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:06,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:15:07,171 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:07,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548688447] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:15:07,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:15:07,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 54 [2022-11-21 16:15:07,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901970719] [2022-11-21 16:15:07,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:15:07,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-21 16:15:07,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:15:07,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-21 16:15:07,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=2361, Unknown=0, NotChecked=0, Total=2862 [2022-11-21 16:15:07,173 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 54 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) [2022-11-21 16:15:11,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:15:11,967 INFO L93 Difference]: Finished difference Result 531 states and 554 transitions. [2022-11-21 16:15:11,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-21 16:15:11,968 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 54 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 59 [2022-11-21 16:15:11,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:15:11,968 INFO L225 Difference]: With dead ends: 531 [2022-11-21 16:15:11,969 INFO L226 Difference]: Without dead ends: 488 [2022-11-21 16:15:11,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 68 SyntacticMatches, 27 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6341 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2626, Invalid=12626, Unknown=0, NotChecked=0, Total=15252 [2022-11-21 16:15:11,970 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 366 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:15:11,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 313 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:15:11,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-11-21 16:15:12,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 85. [2022-11-21 16:15:12,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:12,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-11-21 16:15:12,350 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-11-21 16:15:12,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:15:12,350 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-11-21 16:15:12,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 54 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) [2022-11-21 16:15:12,351 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-11-21 16:15:12,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-21 16:15:12,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:15:12,351 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:15:12,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-11-21 16:15:12,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-11-21 16:15:12,557 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:15:12,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:15:12,557 INFO L85 PathProgramCache]: Analyzing trace with hash -121077027, now seen corresponding path program 63 times [2022-11-21 16:15:12,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:15:12,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564386619] [2022-11-21 16:15:12,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:15:12,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:15:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:15:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 188 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:13,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:15:13,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564386619] [2022-11-21 16:15:13,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564386619] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:15:13,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138644981] [2022-11-21 16:15:13,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:15:13,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:15:13,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:15:13,006 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:15:13,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-11-21 16:15:13,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-21 16:15:13,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:15:13,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-21 16:15:13,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:15:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:13,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:15:14,342 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:14,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138644981] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:15:14,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:15:14,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 53 [2022-11-21 16:15:14,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321680194] [2022-11-21 16:15:14,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:15:14,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-21 16:15:14,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:15:14,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-21 16:15:14,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=2267, Unknown=0, NotChecked=0, Total=2756 [2022-11-21 16:15:14,344 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:19,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:15:19,220 INFO L93 Difference]: Finished difference Result 577 states and 601 transitions. [2022-11-21 16:15:19,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-21 16:15:19,221 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 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 59 [2022-11-21 16:15:19,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:15:19,222 INFO L225 Difference]: With dead ends: 577 [2022-11-21 16:15:19,222 INFO L226 Difference]: Without dead ends: 534 [2022-11-21 16:15:19,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 69 SyntacticMatches, 27 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6003 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2499, Invalid=12021, Unknown=0, NotChecked=0, Total=14520 [2022-11-21 16:15:19,224 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 398 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:15:19,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 335 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:15:19,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-11-21 16:15:19,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 85. [2022-11-21 16:15:19,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:19,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-11-21 16:15:19,588 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-11-21 16:15:19,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:15:19,588 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-11-21 16:15:19,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:19,589 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-11-21 16:15:19,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-21 16:15:19,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:15:19,589 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:15:19,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-11-21 16:15:19,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-11-21 16:15:19,795 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:15:19,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:15:19,796 INFO L85 PathProgramCache]: Analyzing trace with hash 457746204, now seen corresponding path program 64 times [2022-11-21 16:15:19,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:15:19,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993137008] [2022-11-21 16:15:19,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:15:19,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:15:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:15:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 188 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:20,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:15:20,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993137008] [2022-11-21 16:15:20,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993137008] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:15:20,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300167155] [2022-11-21 16:15:20,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:15:20,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:15:20,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:15:20,291 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:15:20,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-11-21 16:15:20,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:15:20,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:15:20,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-21 16:15:20,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:15:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:21,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:15:21,534 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:21,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300167155] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:15:21,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:15:21,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 52 [2022-11-21 16:15:21,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53974298] [2022-11-21 16:15:21,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:15:21,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-21 16:15:21,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:15:21,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-21 16:15:21,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=2171, Unknown=0, NotChecked=0, Total=2652 [2022-11-21 16:15:21,536 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 52 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:26,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:15:26,805 INFO L93 Difference]: Finished difference Result 622 states and 647 transitions. [2022-11-21 16:15:26,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-21 16:15:26,805 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 52 states have internal predecessors, (112), 0 states have call successors, (0), 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 59 [2022-11-21 16:15:26,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:15:26,807 INFO L225 Difference]: With dead ends: 622 [2022-11-21 16:15:26,808 INFO L226 Difference]: Without dead ends: 579 [2022-11-21 16:15:26,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 70 SyntacticMatches, 27 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5480 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2298, Invalid=11042, Unknown=0, NotChecked=0, Total=13340 [2022-11-21 16:15:26,809 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 405 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:15:26,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 320 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:15:26,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-11-21 16:15:27,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 85. [2022-11-21 16:15:27,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:27,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-11-21 16:15:27,188 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-11-21 16:15:27,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:15:27,188 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-11-21 16:15:27,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 52 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:27,188 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-11-21 16:15:27,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-21 16:15:27,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:15:27,188 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:15:27,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-11-21 16:15:27,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-11-21 16:15:27,389 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:15:27,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:15:27,389 INFO L85 PathProgramCache]: Analyzing trace with hash 337870589, now seen corresponding path program 65 times [2022-11-21 16:15:27,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:15:27,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435495600] [2022-11-21 16:15:27,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:15:27,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:15:27,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:15:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 188 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:27,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:15:27,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435495600] [2022-11-21 16:15:27,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435495600] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:15:27,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765143599] [2022-11-21 16:15:27,941 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:15:27,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:15:27,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:15:27,942 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:15:27,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-11-21 16:15:28,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-11-21 16:15:28,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:15:28,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-21 16:15:28,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:15:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:28,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:15:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:29,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765143599] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:15:29,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:15:29,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 51 [2022-11-21 16:15:29,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315800286] [2022-11-21 16:15:29,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:15:29,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-21 16:15:29,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:15:29,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-21 16:15:29,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=2073, Unknown=0, NotChecked=0, Total=2550 [2022-11-21 16:15:29,170 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 51 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:34,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:15:34,368 INFO L93 Difference]: Finished difference Result 666 states and 692 transitions. [2022-11-21 16:15:34,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-21 16:15:34,369 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 51 states have internal predecessors, (111), 0 states have call successors, (0), 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 59 [2022-11-21 16:15:34,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:15:34,370 INFO L225 Difference]: With dead ends: 666 [2022-11-21 16:15:34,371 INFO L226 Difference]: Without dead ends: 623 [2022-11-21 16:15:34,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 71 SyntacticMatches, 27 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4792 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2038, Invalid=9734, Unknown=0, NotChecked=0, Total=11772 [2022-11-21 16:15:34,372 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 639 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:15:34,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 297 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:15:34,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-11-21 16:15:34,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 85. [2022-11-21 16:15:34,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:34,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-11-21 16:15:34,756 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-11-21 16:15:34,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:15:34,757 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-11-21 16:15:34,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 51 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:34,757 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-11-21 16:15:34,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-21 16:15:34,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:15:34,757 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:15:34,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-11-21 16:15:34,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-11-21 16:15:34,958 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:15:34,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:15:34,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1467111684, now seen corresponding path program 66 times [2022-11-21 16:15:34,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:15:34,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019574969] [2022-11-21 16:15:34,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:15:34,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:15:34,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:15:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 188 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:35,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:15:35,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019574969] [2022-11-21 16:15:35,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019574969] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:15:35,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734370510] [2022-11-21 16:15:35,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:15:35,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:15:35,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:15:35,430 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:15:35,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-11-21 16:15:35,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-11-21 16:15:35,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:15:35,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-21 16:15:35,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:15:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:36,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:15:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:36,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734370510] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:15:36,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:15:36,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 50 [2022-11-21 16:15:36,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716860687] [2022-11-21 16:15:36,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:15:36,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-21 16:15:36,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:15:36,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-21 16:15:36,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=1973, Unknown=0, NotChecked=0, Total=2450 [2022-11-21 16:15:36,641 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 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) [2022-11-21 16:15:42,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:15:42,052 INFO L93 Difference]: Finished difference Result 709 states and 736 transitions. [2022-11-21 16:15:42,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-21 16:15:42,053 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 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 59 [2022-11-21 16:15:42,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:15:42,054 INFO L225 Difference]: With dead ends: 709 [2022-11-21 16:15:42,055 INFO L226 Difference]: Without dead ends: 666 [2022-11-21 16:15:42,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 72 SyntacticMatches, 27 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3943 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1740, Invalid=8160, Unknown=0, NotChecked=0, Total=9900 [2022-11-21 16:15:42,056 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 534 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:15:42,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 307 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:15:42,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-11-21 16:15:42,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 85. [2022-11-21 16:15:42,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:42,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-11-21 16:15:42,728 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-11-21 16:15:42,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:15:42,728 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-11-21 16:15:42,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 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) [2022-11-21 16:15:42,729 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-11-21 16:15:42,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-21 16:15:42,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:15:42,729 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:15:42,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-11-21 16:15:42,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-11-21 16:15:42,934 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:15:42,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:15:42,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1940978915, now seen corresponding path program 12 times [2022-11-21 16:15:42,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:15:42,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046353273] [2022-11-21 16:15:42,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:15:42,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:15:42,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:15:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:43,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:15:43,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046353273] [2022-11-21 16:15:43,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046353273] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:15:43,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660610726] [2022-11-21 16:15:43,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:15:43,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:15:43,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:15:43,560 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:15:43,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-11-21 16:15:43,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-11-21 16:15:43,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:15:43,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-21 16:15:43,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:15:44,382 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:44,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:15:44,822 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:44,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660610726] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:15:44,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:15:44,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 49 [2022-11-21 16:15:44,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982011036] [2022-11-21 16:15:44,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:15:44,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-21 16:15:44,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:15:44,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-21 16:15:44,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=1871, Unknown=0, NotChecked=0, Total=2352 [2022-11-21 16:15:44,824 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:50,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:15:50,043 INFO L93 Difference]: Finished difference Result 754 states and 783 transitions. [2022-11-21 16:15:50,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-21 16:15:50,044 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 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 59 [2022-11-21 16:15:50,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:15:50,045 INFO L225 Difference]: With dead ends: 754 [2022-11-21 16:15:50,045 INFO L226 Difference]: Without dead ends: 711 [2022-11-21 16:15:50,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 73 SyntacticMatches, 27 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3038 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1445, Invalid=6387, Unknown=0, NotChecked=0, Total=7832 [2022-11-21 16:15:50,046 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 626 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:15:50,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [626 Valid, 263 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:15:50,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-11-21 16:15:50,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 87. [2022-11-21 16:15:50,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.186046511627907) internal successors, (102), 86 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) [2022-11-21 16:15:50,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2022-11-21 16:15:50,584 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 59 [2022-11-21 16:15:50,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:15:50,584 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2022-11-21 16:15:50,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:50,584 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2022-11-21 16:15:50,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-21 16:15:50,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:15:50,585 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:15:50,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-11-21 16:15:50,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-11-21 16:15:50,786 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:15:50,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:15:50,786 INFO L85 PathProgramCache]: Analyzing trace with hash -794122025, now seen corresponding path program 24 times [2022-11-21 16:15:50,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:15:50,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011228445] [2022-11-21 16:15:50,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:15:50,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:15:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:15:51,025 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 78 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:51,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:15:51,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011228445] [2022-11-21 16:15:51,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011228445] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:15:51,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372041743] [2022-11-21 16:15:51,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:15:51,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:15:51,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:15:51,035 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:15:51,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-11-21 16:15:51,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-11-21 16:15:51,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:15:51,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-21 16:15:51,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:15:51,230 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:51,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:15:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:51,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372041743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:15:51,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:15:51,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2022-11-21 16:15:51,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443386159] [2022-11-21 16:15:51,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:15:51,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-21 16:15:51,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:15:51,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-21 16:15:51,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2022-11-21 16:15:51,528 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:52,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:15:52,374 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2022-11-21 16:15:52,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-21 16:15:52,374 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-21 16:15:52,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:15:52,375 INFO L225 Difference]: With dead ends: 98 [2022-11-21 16:15:52,375 INFO L226 Difference]: Without dead ends: 96 [2022-11-21 16:15:52,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 104 SyntacticMatches, 26 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=398, Invalid=724, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 16:15:52,375 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 146 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:15:52,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 164 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:15:52,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-21 16:15:52,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2022-11-21 16:15:52,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 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) [2022-11-21 16:15:52,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 105 transitions. [2022-11-21 16:15:52,785 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 105 transitions. Word has length 60 [2022-11-21 16:15:52,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:15:52,786 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 105 transitions. [2022-11-21 16:15:52,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:52,786 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 105 transitions. [2022-11-21 16:15:52,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-21 16:15:52,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:15:52,786 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:15:52,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-11-21 16:15:52,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-11-21 16:15:52,987 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:15:52,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:15:52,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1004537287, now seen corresponding path program 25 times [2022-11-21 16:15:52,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:15:52,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244376296] [2022-11-21 16:15:52,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:15:52,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:15:53,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:15:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:53,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:15:53,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244376296] [2022-11-21 16:15:53,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244376296] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:15:53,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124223286] [2022-11-21 16:15:53,550 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:15:53,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:15:53,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:15:53,551 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:15:53,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-11-21 16:15:53,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:15:53,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-21 16:15:53,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:15:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:54,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:15:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:55,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124223286] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:15:55,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:15:55,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-11-21 16:15:55,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855157549] [2022-11-21 16:15:55,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:15:55,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-21 16:15:55,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:15:55,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-21 16:15:55,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=3369, Unknown=0, NotChecked=0, Total=4160 [2022-11-21 16:15:55,233 INFO L87 Difference]: Start difference. First operand 90 states and 105 transitions. Second operand has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:57,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:15:57,240 INFO L93 Difference]: Finished difference Result 194 states and 211 transitions. [2022-11-21 16:15:57,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-21 16:15:57,240 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-21 16:15:57,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:15:57,240 INFO L225 Difference]: With dead ends: 194 [2022-11-21 16:15:57,240 INFO L226 Difference]: Without dead ends: 148 [2022-11-21 16:15:57,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 65 SyntacticMatches, 29 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4643 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1650, Invalid=7280, Unknown=0, NotChecked=0, Total=8930 [2022-11-21 16:15:57,241 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 66 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:15:57,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 314 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:15:57,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-21 16:15:57,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 91. [2022-11-21 16:15:57,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 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) [2022-11-21 16:15:57,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-11-21 16:15:57,716 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-11-21 16:15:57,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:15:57,716 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-11-21 16:15:57,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:57,717 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-11-21 16:15:57,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-21 16:15:57,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:15:57,717 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:15:57,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-11-21 16:15:57,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-11-21 16:15:57,918 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:15:57,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:15:57,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1170782200, now seen corresponding path program 67 times [2022-11-21 16:15:57,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:15:57,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110301021] [2022-11-21 16:15:57,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:15:57,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:15:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:15:58,503 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 223 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:58,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:15:58,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110301021] [2022-11-21 16:15:58,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110301021] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:15:58,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544881327] [2022-11-21 16:15:58,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:15:58,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:15:58,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:15:58,504 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:15:58,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-11-21 16:15:58,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:15:58,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-21 16:15:58,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:15:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:59,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:16:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:00,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544881327] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:16:00,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:16:00,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 64 [2022-11-21 16:16:00,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964462932] [2022-11-21 16:16:00,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:16:00,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-21 16:16:00,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:16:00,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-21 16:16:00,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=748, Invalid=3284, Unknown=0, NotChecked=0, Total=4032 [2022-11-21 16:16:00,165 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 64 states, 64 states have (on average 2.0) internal successors, (128), 64 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:03,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:16:03,007 INFO L93 Difference]: Finished difference Result 251 states and 269 transitions. [2022-11-21 16:16:03,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-21 16:16:03,007 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 64 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-21 16:16:03,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:16:03,007 INFO L225 Difference]: With dead ends: 251 [2022-11-21 16:16:03,007 INFO L226 Difference]: Without dead ends: 205 [2022-11-21 16:16:03,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 66 SyntacticMatches, 29 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5431 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1994, Invalid=9348, Unknown=0, NotChecked=0, Total=11342 [2022-11-21 16:16:03,008 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 133 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:16:03,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 293 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:16:03,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-21 16:16:03,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 91. [2022-11-21 16:16:03,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 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) [2022-11-21 16:16:03,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-11-21 16:16:03,591 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-11-21 16:16:03,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:16:03,592 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-11-21 16:16:03,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 64 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:03,592 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-11-21 16:16:03,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-21 16:16:03,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:16:03,593 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:16:03,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-11-21 16:16:03,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-11-21 16:16:03,799 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:16:03,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:16:03,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1933690457, now seen corresponding path program 68 times [2022-11-21 16:16:03,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:16:03,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665083471] [2022-11-21 16:16:03,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:16:03,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:16:03,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:16:04,377 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 223 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:04,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:16:04,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665083471] [2022-11-21 16:16:04,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665083471] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:16:04,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316248625] [2022-11-21 16:16:04,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:16:04,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:16:04,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:16:04,379 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:16:04,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-11-21 16:16:04,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:16:04,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:16:04,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-21 16:16:04,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:16:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 260 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:05,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:16:06,195 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 260 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:06,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316248625] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:16:06,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:16:06,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 63 [2022-11-21 16:16:06,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581511806] [2022-11-21 16:16:06,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:16:06,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-21 16:16:06,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:16:06,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-21 16:16:06,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=3197, Unknown=0, NotChecked=0, Total=3906 [2022-11-21 16:16:06,197 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:09,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:16:09,743 INFO L93 Difference]: Finished difference Result 307 states and 326 transitions. [2022-11-21 16:16:09,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-21 16:16:09,744 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-21 16:16:09,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:16:09,744 INFO L225 Difference]: With dead ends: 307 [2022-11-21 16:16:09,744 INFO L226 Difference]: Without dead ends: 261 [2022-11-21 16:16:09,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 67 SyntacticMatches, 29 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6177 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2348, Invalid=11224, Unknown=0, NotChecked=0, Total=13572 [2022-11-21 16:16:09,745 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 247 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:16:09,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 236 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:16:09,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-21 16:16:10,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 91. [2022-11-21 16:16:10,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 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) [2022-11-21 16:16:10,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-11-21 16:16:10,365 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-11-21 16:16:10,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:16:10,366 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-11-21 16:16:10,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:10,366 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-11-21 16:16:10,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-21 16:16:10,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:16:10,367 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:16:10,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-11-21 16:16:10,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-11-21 16:16:10,573 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:16:10,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:16:10,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1127016408, now seen corresponding path program 69 times [2022-11-21 16:16:10,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:16:10,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206482948] [2022-11-21 16:16:10,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:16:10,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:16:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:16:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 223 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:11,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:16:11,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206482948] [2022-11-21 16:16:11,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206482948] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:16:11,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119992988] [2022-11-21 16:16:11,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:16:11,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:16:11,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:16:11,212 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:16:11,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-11-21 16:16:11,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-11-21 16:16:11,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:16:11,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-21 16:16:11,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:16:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 260 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:12,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:16:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 260 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:12,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119992988] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:16:12,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:16:12,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 62 [2022-11-21 16:16:12,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587783902] [2022-11-21 16:16:12,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:16:12,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-21 16:16:12,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:16:12,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-21 16:16:12,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=3108, Unknown=0, NotChecked=0, Total=3782 [2022-11-21 16:16:12,904 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:17,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:16:17,418 INFO L93 Difference]: Finished difference Result 362 states and 382 transitions. [2022-11-21 16:16:17,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-21 16:16:17,418 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-21 16:16:17,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:16:17,419 INFO L225 Difference]: With dead ends: 362 [2022-11-21 16:16:17,419 INFO L226 Difference]: Without dead ends: 316 [2022-11-21 16:16:17,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 68 SyntacticMatches, 29 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6828 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2667, Invalid=12833, Unknown=0, NotChecked=0, Total=15500 [2022-11-21 16:16:17,420 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 254 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:16:17,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 320 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:16:17,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-11-21 16:16:17,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 91. [2022-11-21 16:16:17,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 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) [2022-11-21 16:16:17,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-11-21 16:16:17,985 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-11-21 16:16:17,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:16:17,985 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-11-21 16:16:17,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:17,986 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-11-21 16:16:17,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-21 16:16:17,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:16:17,986 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:16:17,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-11-21 16:16:18,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-11-21 16:16:18,192 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:16:18,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:16:18,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1655183993, now seen corresponding path program 70 times [2022-11-21 16:16:18,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:16:18,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595317218] [2022-11-21 16:16:18,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:16:18,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:16:18,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:16:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 223 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:18,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:16:18,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595317218] [2022-11-21 16:16:18,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595317218] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:16:18,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324235686] [2022-11-21 16:16:18,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:16:18,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:16:18,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:16:18,832 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:16:18,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-11-21 16:16:18,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:16:18,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:16:18,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-21 16:16:18,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:16:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 260 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:19,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:16:20,473 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 260 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:20,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324235686] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:16:20,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:16:20,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 61 [2022-11-21 16:16:20,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104523360] [2022-11-21 16:16:20,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:16:20,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-21 16:16:20,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:16:20,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-21 16:16:20,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=643, Invalid=3017, Unknown=0, NotChecked=0, Total=3660 [2022-11-21 16:16:20,476 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:25,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:16:25,350 INFO L93 Difference]: Finished difference Result 416 states and 437 transitions. [2022-11-21 16:16:25,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-21 16:16:25,350 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-21 16:16:25,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:16:25,351 INFO L225 Difference]: With dead ends: 416 [2022-11-21 16:16:25,351 INFO L226 Difference]: Without dead ends: 370 [2022-11-21 16:16:25,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 69 SyntacticMatches, 29 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7349 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2927, Invalid=14103, Unknown=0, NotChecked=0, Total=17030 [2022-11-21 16:16:25,353 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 252 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:16:25,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 425 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:16:25,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-11-21 16:16:25,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 91. [2022-11-21 16:16:25,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 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) [2022-11-21 16:16:25,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-11-21 16:16:25,861 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-11-21 16:16:25,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:16:25,861 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-11-21 16:16:25,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:25,862 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-11-21 16:16:25,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-21 16:16:25,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:16:25,862 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:16:25,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-11-21 16:16:26,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:16:26,063 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:16:26,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:16:26,063 INFO L85 PathProgramCache]: Analyzing trace with hash 563843000, now seen corresponding path program 71 times [2022-11-21 16:16:26,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:16:26,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815317513] [2022-11-21 16:16:26,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:16:26,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:16:26,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:16:26,665 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 223 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:26,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:16:26,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815317513] [2022-11-21 16:16:26,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815317513] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:16:26,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17920604] [2022-11-21 16:16:26,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:16:26,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:16:26,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:16:26,667 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:16:26,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-11-21 16:16:26,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-11-21 16:16:26,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:16:26,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-21 16:16:26,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:16:27,802 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 260 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:27,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:16:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 260 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:28,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17920604] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:16:28,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:16:28,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 60 [2022-11-21 16:16:28,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018049224] [2022-11-21 16:16:28,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:16:28,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-21 16:16:28,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:16:28,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-21 16:16:28,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=2924, Unknown=0, NotChecked=0, Total=3540 [2022-11-21 16:16:28,305 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:33,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:16:33,936 INFO L93 Difference]: Finished difference Result 469 states and 491 transitions. [2022-11-21 16:16:33,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-21 16:16:33,937 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-21 16:16:33,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:16:33,937 INFO L225 Difference]: With dead ends: 469 [2022-11-21 16:16:33,937 INFO L226 Difference]: Without dead ends: 423 [2022-11-21 16:16:33,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 70 SyntacticMatches, 29 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7702 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3110, Invalid=14980, Unknown=0, NotChecked=0, Total=18090 [2022-11-21 16:16:33,939 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 329 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:16:33,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 316 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:16:33,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-11-21 16:16:34,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 91. [2022-11-21 16:16:34,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 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) [2022-11-21 16:16:34,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-11-21 16:16:34,639 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-11-21 16:16:34,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:16:34,640 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-11-21 16:16:34,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:34,640 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-11-21 16:16:34,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-21 16:16:34,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:16:34,641 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:16:34,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-11-21 16:16:34,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2022-11-21 16:16:34,848 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:16:34,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:16:34,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1775564441, now seen corresponding path program 72 times [2022-11-21 16:16:34,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:16:34,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049667010] [2022-11-21 16:16:34,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:16:34,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:16:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:16:35,372 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 223 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:35,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:16:35,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049667010] [2022-11-21 16:16:35,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049667010] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:16:35,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909559453] [2022-11-21 16:16:35,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:16:35,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:16:35,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:16:35,373 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:16:35,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-11-21 16:16:35,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-11-21 16:16:35,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:16:35,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-21 16:16:35,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:16:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 260 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:36,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:16:36,921 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 260 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:36,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909559453] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:16:36,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:16:36,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 59 [2022-11-21 16:16:36,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671953613] [2022-11-21 16:16:36,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:16:36,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-21 16:16:36,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:16:36,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-21 16:16:36,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=2829, Unknown=0, NotChecked=0, Total=3422 [2022-11-21 16:16:36,923 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:43,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:16:43,265 INFO L93 Difference]: Finished difference Result 521 states and 544 transitions. [2022-11-21 16:16:43,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-21 16:16:43,265 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-21 16:16:43,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:16:43,265 INFO L225 Difference]: With dead ends: 521 [2022-11-21 16:16:43,265 INFO L226 Difference]: Without dead ends: 475 [2022-11-21 16:16:43,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 71 SyntacticMatches, 29 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7861 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3204, Invalid=15428, Unknown=0, NotChecked=0, Total=18632 [2022-11-21 16:16:43,266 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 421 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:16:43,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 277 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:16:43,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-11-21 16:16:43,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 91. [2022-11-21 16:16:43,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 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) [2022-11-21 16:16:43,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-11-21 16:16:43,734 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-11-21 16:16:43,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:16:43,734 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-11-21 16:16:43,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:43,734 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-11-21 16:16:43,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-21 16:16:43,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:16:43,734 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:16:43,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-11-21 16:16:43,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:16:43,935 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:16:43,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:16:43,935 INFO L85 PathProgramCache]: Analyzing trace with hash 290631576, now seen corresponding path program 73 times [2022-11-21 16:16:43,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:16:43,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372528830] [2022-11-21 16:16:43,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:16:43,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:16:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:16:44,420 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 223 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:44,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:16:44,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372528830] [2022-11-21 16:16:44,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372528830] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:16:44,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585556693] [2022-11-21 16:16:44,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:16:44,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:16:44,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:16:44,422 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:16:44,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-11-21 16:16:44,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:16:44,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-21 16:16:44,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:16:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 260 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:45,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:16:45,873 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 260 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:45,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585556693] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:16:45,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:16:45,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 58 [2022-11-21 16:16:45,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601508682] [2022-11-21 16:16:45,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:16:45,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-21 16:16:45,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:16:45,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-21 16:16:45,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=2732, Unknown=0, NotChecked=0, Total=3306 [2022-11-21 16:16:45,875 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 58 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:52,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:16:52,564 INFO L93 Difference]: Finished difference Result 572 states and 596 transitions. [2022-11-21 16:16:52,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-11-21 16:16:52,565 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 58 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-21 16:16:52,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:16:52,566 INFO L225 Difference]: With dead ends: 572 [2022-11-21 16:16:52,566 INFO L226 Difference]: Without dead ends: 526 [2022-11-21 16:16:52,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 72 SyntacticMatches, 29 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7812 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3203, Invalid=15429, Unknown=0, NotChecked=0, Total=18632 [2022-11-21 16:16:52,567 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 449 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:16:52,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 397 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:16:52,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-11-21 16:16:53,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 91. [2022-11-21 16:16:53,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 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) [2022-11-21 16:16:53,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-11-21 16:16:53,599 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-11-21 16:16:53,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:16:53,599 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-11-21 16:16:53,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 58 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:53,599 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-11-21 16:16:53,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-21 16:16:53,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:16:53,600 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:16:53,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-11-21 16:16:53,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:16:53,807 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:16:53,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:16:53,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1489656505, now seen corresponding path program 74 times [2022-11-21 16:16:53,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:16:53,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004294699] [2022-11-21 16:16:53,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:16:53,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:16:53,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:16:54,386 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 223 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:54,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:16:54,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004294699] [2022-11-21 16:16:54,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004294699] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:16:54,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708407936] [2022-11-21 16:16:54,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:16:54,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:16:54,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:16:54,387 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:16:54,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-11-21 16:16:54,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:16:54,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:16:54,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-21 16:16:54,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:16:55,294 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 260 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:55,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:16:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 260 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:55,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708407936] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:16:55,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:16:55,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 57 [2022-11-21 16:16:55,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098573420] [2022-11-21 16:16:55,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:16:55,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-21 16:16:55,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:16:55,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-21 16:16:55,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=2633, Unknown=0, NotChecked=0, Total=3192 [2022-11-21 16:16:55,779 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:17:03,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:17:03,649 INFO L93 Difference]: Finished difference Result 622 states and 647 transitions. [2022-11-21 16:17:03,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-11-21 16:17:03,649 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-21 16:17:03,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:17:03,650 INFO L225 Difference]: With dead ends: 622 [2022-11-21 16:17:03,650 INFO L226 Difference]: Without dead ends: 576 [2022-11-21 16:17:03,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 73 SyntacticMatches, 29 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7549 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3107, Invalid=14983, Unknown=0, NotChecked=0, Total=18090 [2022-11-21 16:17:03,651 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 472 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:17:03,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 293 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:17:03,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-11-21 16:17:04,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 91. [2022-11-21 16:17:04,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 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) [2022-11-21 16:17:04,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-11-21 16:17:04,330 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-11-21 16:17:04,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:17:04,331 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-11-21 16:17:04,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:17:04,331 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-11-21 16:17:04,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-21 16:17:04,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:17:04,332 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:17:04,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-11-21 16:17:04,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-11-21 16:17:04,539 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:17:04,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:17:04,539 INFO L85 PathProgramCache]: Analyzing trace with hash 974145400, now seen corresponding path program 75 times [2022-11-21 16:17:04,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:17:04,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282416528] [2022-11-21 16:17:04,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:17:04,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:17:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:17:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 223 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:05,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:17:05,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282416528] [2022-11-21 16:17:05,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282416528] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:17:05,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574898124] [2022-11-21 16:17:05,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:17:05,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:17:05,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:17:05,125 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:17:05,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-11-21 16:17:05,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-11-21 16:17:05,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:17:05,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-21 16:17:05,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:17:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 260 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:06,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:17:06,588 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 260 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:06,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574898124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:17:06,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:17:06,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 56 [2022-11-21 16:17:06,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825035567] [2022-11-21 16:17:06,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:17:06,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-21 16:17:06,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:17:06,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-21 16:17:06,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2022-11-21 16:17:06,591 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 56 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:17:14,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:17:14,452 INFO L93 Difference]: Finished difference Result 671 states and 697 transitions. [2022-11-21 16:17:14,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-21 16:17:14,452 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 56 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-21 16:17:14,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:17:14,453 INFO L225 Difference]: With dead ends: 671 [2022-11-21 16:17:14,453 INFO L226 Difference]: Without dead ends: 625 [2022-11-21 16:17:14,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 74 SyntacticMatches, 29 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7074 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2922, Invalid=14108, Unknown=0, NotChecked=0, Total=17030 [2022-11-21 16:17:14,454 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 454 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:17:14,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 326 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:17:14,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-11-21 16:17:15,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 91. [2022-11-21 16:17:15,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 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) [2022-11-21 16:17:15,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-11-21 16:17:15,021 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-11-21 16:17:15,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:17:15,021 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-11-21 16:17:15,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 56 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:17:15,022 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-11-21 16:17:15,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-21 16:17:15,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:17:15,022 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:17:15,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-11-21 16:17:15,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-11-21 16:17:15,228 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:17:15,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:17:15,228 INFO L85 PathProgramCache]: Analyzing trace with hash 403326681, now seen corresponding path program 76 times [2022-11-21 16:17:15,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:17:15,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377539438] [2022-11-21 16:17:15,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:17:15,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:17:15,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:17:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 223 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:15,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:17:15,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377539438] [2022-11-21 16:17:15,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377539438] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:17:15,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664475204] [2022-11-21 16:17:15,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:17:15,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:17:15,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:17:15,840 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:17:15,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-11-21 16:17:15,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:17:15,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:17:15,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-21 16:17:15,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:17:16,793 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 260 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:16,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:17:17,309 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 260 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:17,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664475204] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:17:17,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:17:17,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 55 [2022-11-21 16:17:17,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355486323] [2022-11-21 16:17:17,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:17:17,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-21 16:17:17,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:17:17,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-21 16:17:17,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=2429, Unknown=0, NotChecked=0, Total=2970 [2022-11-21 16:17:17,311 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:17:24,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:17:24,978 INFO L93 Difference]: Finished difference Result 719 states and 746 transitions. [2022-11-21 16:17:24,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-21 16:17:24,978 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-21 16:17:24,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:17:24,979 INFO L225 Difference]: With dead ends: 719 [2022-11-21 16:17:24,979 INFO L226 Difference]: Without dead ends: 673 [2022-11-21 16:17:24,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 75 SyntacticMatches, 29 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6401 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2660, Invalid=12840, Unknown=0, NotChecked=0, Total=15500 [2022-11-21 16:17:24,981 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 494 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:17:24,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 326 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:17:24,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-11-21 16:17:25,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 91. [2022-11-21 16:17:25,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 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) [2022-11-21 16:17:25,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-11-21 16:17:25,684 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-11-21 16:17:25,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:17:25,684 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-11-21 16:17:25,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:17:25,684 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-11-21 16:17:25,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-21 16:17:25,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:17:25,685 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:17:25,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-11-21 16:17:25,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-11-21 16:17:25,898 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:17:25,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:17:25,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1693296808, now seen corresponding path program 77 times [2022-11-21 16:17:25,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:17:25,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916836730] [2022-11-21 16:17:25,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:17:25,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:17:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:17:26,475 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 223 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:26,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:17:26,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916836730] [2022-11-21 16:17:26,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916836730] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:17:26,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744506189] [2022-11-21 16:17:26,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:17:26,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:17:26,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:17:26,477 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:17:26,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-11-21 16:17:26,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-11-21 16:17:26,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:17:26,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-21 16:17:26,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:17:27,482 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 260 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:27,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:17:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 260 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:28,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744506189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:17:28,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:17:28,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 54 [2022-11-21 16:17:28,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127058696] [2022-11-21 16:17:28,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:17:28,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-21 16:17:28,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:17:28,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-21 16:17:28,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=2324, Unknown=0, NotChecked=0, Total=2862 [2022-11-21 16:17:28,040 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:17:35,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:17:35,483 INFO L93 Difference]: Finished difference Result 766 states and 794 transitions. [2022-11-21 16:17:35,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-21 16:17:35,483 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-21 16:17:35,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:17:35,485 INFO L225 Difference]: With dead ends: 766 [2022-11-21 16:17:35,485 INFO L226 Difference]: Without dead ends: 720 [2022-11-21 16:17:35,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 76 SyntacticMatches, 29 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5556 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2339, Invalid=11233, Unknown=0, NotChecked=0, Total=13572 [2022-11-21 16:17:35,486 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 544 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:17:35,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 318 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:17:35,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-11-21 16:17:36,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 91. [2022-11-21 16:17:36,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 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) [2022-11-21 16:17:36,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-11-21 16:17:36,347 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-11-21 16:17:36,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:17:36,347 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-11-21 16:17:36,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:17:36,347 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-11-21 16:17:36,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-21 16:17:36,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:17:36,348 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:17:36,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-11-21 16:17:36,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:17:36,548 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:17:36,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:17:36,548 INFO L85 PathProgramCache]: Analyzing trace with hash -929645831, now seen corresponding path program 78 times [2022-11-21 16:17:36,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:17:36,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801251733] [2022-11-21 16:17:36,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:17:36,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:17:36,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:17:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 223 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:37,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:17:37,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801251733] [2022-11-21 16:17:37,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801251733] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:17:37,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643288551] [2022-11-21 16:17:37,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:17:37,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:17:37,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:17:37,147 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:17:37,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-11-21 16:17:37,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-11-21 16:17:37,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:17:37,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-21 16:17:37,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:17:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:38,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:17:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:38,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643288551] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:17:38,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:17:38,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 53 [2022-11-21 16:17:38,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301353760] [2022-11-21 16:17:38,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:17:38,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-21 16:17:38,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:17:38,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-21 16:17:38,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=2217, Unknown=0, NotChecked=0, Total=2756 [2022-11-21 16:17:38,522 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:17:47,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:17:47,341 INFO L93 Difference]: Finished difference Result 812 states and 841 transitions. [2022-11-21 16:17:47,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-21 16:17:47,341 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-21 16:17:47,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:17:47,342 INFO L225 Difference]: With dead ends: 812 [2022-11-21 16:17:47,342 INFO L226 Difference]: Without dead ends: 766 [2022-11-21 16:17:47,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 77 SyntacticMatches, 29 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4547 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1983, Invalid=9359, Unknown=0, NotChecked=0, Total=11342 [2022-11-21 16:17:47,343 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 437 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:17:47,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 399 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:17:47,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-11-21 16:17:47,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 91. [2022-11-21 16:17:47,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 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) [2022-11-21 16:17:47,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-11-21 16:17:47,877 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-11-21 16:17:47,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:17:47,877 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-11-21 16:17:47,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:17:47,877 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-11-21 16:17:47,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-21 16:17:47,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:17:47,878 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:17:47,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-11-21 16:17:48,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:17:48,078 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:17:48,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:17:48,078 INFO L85 PathProgramCache]: Analyzing trace with hash -350822600, now seen corresponding path program 13 times [2022-11-21 16:17:48,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:17:48,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056456860] [2022-11-21 16:17:48,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:17:48,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:17:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:17:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:48,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:17:48,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056456860] [2022-11-21 16:17:48,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056456860] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:17:48,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000310917] [2022-11-21 16:17:48,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:17:48,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:17:48,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:17:48,710 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:17:48,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-11-21 16:17:48,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:17:48,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-21 16:17:48,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:17:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:49,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:17:50,062 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:50,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000310917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:17:50,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:17:50,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 52 [2022-11-21 16:17:50,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791670356] [2022-11-21 16:17:50,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:17:50,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-21 16:17:50,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:17:50,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-21 16:17:50,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=2108, Unknown=0, NotChecked=0, Total=2652 [2022-11-21 16:17:50,064 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 52 states, 52 states have (on average 2.230769230769231) internal successors, (116), 52 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:17:58,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:17:58,311 INFO L93 Difference]: Finished difference Result 860 states and 891 transitions. [2022-11-21 16:17:58,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-21 16:17:58,311 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.230769230769231) internal successors, (116), 52 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-21 16:17:58,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:17:58,312 INFO L225 Difference]: With dead ends: 860 [2022-11-21 16:17:58,312 INFO L226 Difference]: Without dead ends: 814 [2022-11-21 16:17:58,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 78 SyntacticMatches, 29 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3489 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1637, Invalid=7293, Unknown=0, NotChecked=0, Total=8930 [2022-11-21 16:17:58,313 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 479 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:17:58,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 356 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:17:58,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-11-21 16:17:59,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 93. [2022-11-21 16:17:59,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.184782608695652) internal successors, (109), 92 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:17:59,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2022-11-21 16:17:59,042 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 63 [2022-11-21 16:17:59,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:17:59,042 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2022-11-21 16:17:59,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.230769230769231) internal successors, (116), 52 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:17:59,042 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2022-11-21 16:17:59,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-21 16:17:59,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:17:59,043 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:17:59,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-11-21 16:17:59,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:17:59,243 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:17:59,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:17:59,243 INFO L85 PathProgramCache]: Analyzing trace with hash -2032864333, now seen corresponding path program 26 times [2022-11-21 16:17:59,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:17:59,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493584781] [2022-11-21 16:17:59,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:17:59,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:17:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:17:59,607 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 91 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:59,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:17:59,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493584781] [2022-11-21 16:17:59,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493584781] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:17:59,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153533875] [2022-11-21 16:17:59,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:17:59,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:17:59,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:17:59,609 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:17:59,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-11-21 16:17:59,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:17:59,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:17:59,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-21 16:17:59,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:17:59,842 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:59,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:18:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:00,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153533875] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:18:00,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:18:00,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 20 [2022-11-21 16:18:00,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088857906] [2022-11-21 16:18:00,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:18:00,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-21 16:18:00,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:00,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-21 16:18:00,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2022-11-21 16:18:00,198 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:18:01,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:18:01,271 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2022-11-21 16:18:01,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-21 16:18:01,272 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-11-21 16:18:01,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:18:01,272 INFO L225 Difference]: With dead ends: 104 [2022-11-21 16:18:01,272 INFO L226 Difference]: Without dead ends: 102 [2022-11-21 16:18:01,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 111 SyntacticMatches, 28 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=448, Invalid=812, Unknown=0, NotChecked=0, Total=1260 [2022-11-21 16:18:01,273 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 122 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:18:01,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 236 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:18:01,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-21 16:18:01,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2022-11-21 16:18:01,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 95 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:18:01,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2022-11-21 16:18:01,990 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 64 [2022-11-21 16:18:01,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:18:01,991 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2022-11-21 16:18:01,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:18:01,991 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2022-11-21 16:18:01,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-21 16:18:01,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:18:01,991 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:18:01,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-11-21 16:18:02,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-11-21 16:18:02,192 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:18:02,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:02,192 INFO L85 PathProgramCache]: Analyzing trace with hash -2017627683, now seen corresponding path program 27 times [2022-11-21 16:18:02,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:02,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324783361] [2022-11-21 16:18:02,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:02,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:02,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:02,845 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 261 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:02,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:02,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324783361] [2022-11-21 16:18:02,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324783361] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:18:02,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734827011] [2022-11-21 16:18:02,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:18:02,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:18:02,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:18:02,846 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:18:02,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-11-21 16:18:02,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-11-21 16:18:02,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:18:02,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-21 16:18:02,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:18:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:04,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:18:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:04,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734827011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:18:04,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:18:04,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2022-11-21 16:18:04,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792651796] [2022-11-21 16:18:04,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:18:04,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-21 16:18:04,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:04,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-21 16:18:04,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=891, Invalid=3801, Unknown=0, NotChecked=0, Total=4692 [2022-11-21 16:18:04,737 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 69 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:18:07,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:18:07,484 INFO L93 Difference]: Finished difference Result 207 states and 225 transitions. [2022-11-21 16:18:07,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-21 16:18:07,484 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 69 states have internal predecessors, (137), 0 states have call successors, (0), 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 67 [2022-11-21 16:18:07,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:18:07,485 INFO L225 Difference]: With dead ends: 207 [2022-11-21 16:18:07,485 INFO L226 Difference]: Without dead ends: 158 [2022-11-21 16:18:07,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 69 SyntacticMatches, 31 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5298 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1855, Invalid=8245, Unknown=0, NotChecked=0, Total=10100 [2022-11-21 16:18:07,486 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 82 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:18:07,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 235 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:18:07,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-21 16:18:08,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 97. [2022-11-21 16:18:08,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:18:08,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-21 16:18:08,184 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-11-21 16:18:08,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:18:08,184 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-21 16:18:08,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 69 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:18:08,185 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-21 16:18:08,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-21 16:18:08,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:18:08,185 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:18:08,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-11-21 16:18:08,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-11-21 16:18:08,386 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:18:08,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:08,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1732458524, now seen corresponding path program 79 times [2022-11-21 16:18:08,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:08,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550386417] [2022-11-21 16:18:08,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:08,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:09,068 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 261 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:09,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:09,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550386417] [2022-11-21 16:18:09,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550386417] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:18:09,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555702205] [2022-11-21 16:18:09,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:18:09,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:18:09,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:18:09,070 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:18:09,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-11-21 16:18:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:09,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-21 16:18:09,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:18:10,411 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 301 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:10,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:18:11,007 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 301 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:11,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555702205] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:18:11,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:18:11,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 68 [2022-11-21 16:18:11,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209208291] [2022-11-21 16:18:11,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:18:11,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-21 16:18:11,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:11,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-21 16:18:11,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=845, Invalid=3711, Unknown=0, NotChecked=0, Total=4556 [2022-11-21 16:18:11,009 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 68 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:18:14,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:18:14,412 INFO L93 Difference]: Finished difference Result 268 states and 287 transitions. [2022-11-21 16:18:14,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-21 16:18:14,412 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 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 67 [2022-11-21 16:18:14,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:18:14,412 INFO L225 Difference]: With dead ends: 268 [2022-11-21 16:18:14,413 INFO L226 Difference]: Without dead ends: 219 [2022-11-21 16:18:14,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 70 SyntacticMatches, 31 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6218 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2254, Invalid=10628, Unknown=0, NotChecked=0, Total=12882 [2022-11-21 16:18:14,413 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 145 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:18:14,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 247 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:18:14,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-11-21 16:18:15,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 97. [2022-11-21 16:18:15,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:18:15,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-21 16:18:15,066 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-11-21 16:18:15,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:18:15,067 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-21 16:18:15,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:18:15,067 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-21 16:18:15,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-21 16:18:15,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:18:15,067 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:18:15,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-11-21 16:18:15,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:18:15,268 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:18:15,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:15,268 INFO L85 PathProgramCache]: Analyzing trace with hash -86233603, now seen corresponding path program 80 times [2022-11-21 16:18:15,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:15,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286245136] [2022-11-21 16:18:15,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:15,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 261 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:15,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:15,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286245136] [2022-11-21 16:18:15,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286245136] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:18:15,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755164187] [2022-11-21 16:18:15,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:18:15,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:18:15,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:18:15,914 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:18:15,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-11-21 16:18:15,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:18:15,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:18:15,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-21 16:18:15,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:18:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 301 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:17,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:18:17,777 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 301 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:17,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755164187] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:18:17,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:18:17,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 67 [2022-11-21 16:18:17,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363976459] [2022-11-21 16:18:17,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:18:17,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-21 16:18:17,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:17,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-21 16:18:17,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=3619, Unknown=0, NotChecked=0, Total=4422 [2022-11-21 16:18:17,779 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 67 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:18:23,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:18:23,093 INFO L93 Difference]: Finished difference Result 328 states and 348 transitions. [2022-11-21 16:18:23,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-21 16:18:23,093 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 67 states have internal predecessors, (135), 0 states have call successors, (0), 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 67 [2022-11-21 16:18:23,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:18:23,094 INFO L225 Difference]: With dead ends: 328 [2022-11-21 16:18:23,094 INFO L226 Difference]: Without dead ends: 279 [2022-11-21 16:18:23,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 71 SyntacticMatches, 31 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7107 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2671, Invalid=12829, Unknown=0, NotChecked=0, Total=15500 [2022-11-21 16:18:23,095 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 194 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:18:23,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 293 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:18:23,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-11-21 16:18:23,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 97. [2022-11-21 16:18:23,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:18:23,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-21 16:18:23,781 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-11-21 16:18:23,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:18:23,781 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-21 16:18:23,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 67 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:18:23,782 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-21 16:18:23,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-21 16:18:23,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:18:23,782 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:18:23,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-11-21 16:18:23,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:18:23,983 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:18:23,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:23,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1253279748, now seen corresponding path program 81 times [2022-11-21 16:18:23,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:23,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688998859] [2022-11-21 16:18:23,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:23,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 261 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:24,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:24,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688998859] [2022-11-21 16:18:24,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688998859] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:18:24,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760776126] [2022-11-21 16:18:24,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:18:24,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:18:24,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:18:24,614 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:18:24,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-11-21 16:18:24,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-11-21 16:18:24,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:18:24,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-21 16:18:24,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:18:25,779 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 301 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:25,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:18:26,313 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 301 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:26,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760776126] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:18:26,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:18:26,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 66 [2022-11-21 16:18:26,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405991595] [2022-11-21 16:18:26,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:18:26,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-21 16:18:26,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:26,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-21 16:18:26,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=3525, Unknown=0, NotChecked=0, Total=4290 [2022-11-21 16:18:26,315 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 66 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:18:31,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:18:31,905 INFO L93 Difference]: Finished difference Result 387 states and 408 transitions. [2022-11-21 16:18:31,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-21 16:18:31,905 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 66 states have internal predecessors, (134), 0 states have call successors, (0), 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 67 [2022-11-21 16:18:31,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:18:31,906 INFO L225 Difference]: With dead ends: 387 [2022-11-21 16:18:31,906 INFO L226 Difference]: Without dead ends: 338 [2022-11-21 16:18:31,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 72 SyntacticMatches, 31 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7907 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3057, Invalid=14765, Unknown=0, NotChecked=0, Total=17822 [2022-11-21 16:18:31,907 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 263 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:18:31,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 293 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:18:31,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-11-21 16:18:32,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 97. [2022-11-21 16:18:32,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:18:32,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-21 16:18:32,717 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-11-21 16:18:32,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:18:32,717 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-21 16:18:32,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 66 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:18:32,717 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-21 16:18:32,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-21 16:18:32,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:18:32,718 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:18:32,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-11-21 16:18:32,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-11-21 16:18:32,919 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:18:32,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:32,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1757114909, now seen corresponding path program 82 times [2022-11-21 16:18:32,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:32,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76851689] [2022-11-21 16:18:32,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:32,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:32,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:33,703 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 261 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:33,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:33,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76851689] [2022-11-21 16:18:33,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76851689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:18:33,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451748493] [2022-11-21 16:18:33,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:18:33,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:18:33,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:18:33,705 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:18:33,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-11-21 16:18:33,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:18:33,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:18:33,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-21 16:18:33,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:18:35,036 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 301 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:35,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:18:35,703 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 301 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:35,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451748493] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:18:35,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:18:35,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 65 [2022-11-21 16:18:35,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705222641] [2022-11-21 16:18:35,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:18:35,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-21 16:18:35,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:35,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-21 16:18:35,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=731, Invalid=3429, Unknown=0, NotChecked=0, Total=4160 [2022-11-21 16:18:35,706 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:18:42,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:18:42,660 INFO L93 Difference]: Finished difference Result 445 states and 467 transitions. [2022-11-21 16:18:42,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-21 16:18:42,660 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 0 states have call successors, (0), 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 67 [2022-11-21 16:18:42,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:18:42,661 INFO L225 Difference]: With dead ends: 445 [2022-11-21 16:18:42,661 INFO L226 Difference]: Without dead ends: 396 [2022-11-21 16:18:42,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 73 SyntacticMatches, 31 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8578 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3385, Invalid=16355, Unknown=0, NotChecked=0, Total=19740 [2022-11-21 16:18:42,662 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 332 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:18:42,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 335 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:18:42,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-11-21 16:18:43,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 97. [2022-11-21 16:18:43,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:18:43,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-21 16:18:43,473 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-11-21 16:18:43,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:18:43,473 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-21 16:18:43,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:18:43,474 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-21 16:18:43,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-21 16:18:43,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:18:43,474 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:18:43,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-11-21 16:18:43,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-11-21 16:18:43,675 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:18:43,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:43,675 INFO L85 PathProgramCache]: Analyzing trace with hash -362532900, now seen corresponding path program 83 times [2022-11-21 16:18:43,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:43,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396971473] [2022-11-21 16:18:43,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:43,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:44,365 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 261 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:44,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:44,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396971473] [2022-11-21 16:18:44,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396971473] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:18:44,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362621205] [2022-11-21 16:18:44,366 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:18:44,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:18:44,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:18:44,367 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:18:44,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-11-21 16:18:44,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-11-21 16:18:44,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:18:44,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-21 16:18:44,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:18:45,744 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 301 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:45,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:18:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 301 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:46,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362621205] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:18:46,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:18:46,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 64 [2022-11-21 16:18:46,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618335191] [2022-11-21 16:18:46,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:18:46,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-21 16:18:46,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:46,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-21 16:18:46,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=3331, Unknown=0, NotChecked=0, Total=4032 [2022-11-21 16:18:46,382 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 64 states, 64 states have (on average 2.0625) internal successors, (132), 64 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:18:54,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:18:54,290 INFO L93 Difference]: Finished difference Result 502 states and 525 transitions. [2022-11-21 16:18:54,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-11-21 16:18:54,290 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 64 states have internal predecessors, (132), 0 states have call successors, (0), 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 67 [2022-11-21 16:18:54,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:18:54,291 INFO L225 Difference]: With dead ends: 502 [2022-11-21 16:18:54,292 INFO L226 Difference]: Without dead ends: 453 [2022-11-21 16:18:54,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 74 SyntacticMatches, 31 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9076 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3634, Invalid=17536, Unknown=0, NotChecked=0, Total=21170 [2022-11-21 16:18:54,294 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 361 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:18:54,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 356 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:18:54,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-11-21 16:18:55,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 97. [2022-11-21 16:18:55,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:18:55,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-21 16:18:55,304 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-11-21 16:18:55,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:18:55,304 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-21 16:18:55,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 64 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:18:55,305 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-21 16:18:55,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-21 16:18:55,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:18:55,305 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:18:55,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-11-21 16:18:55,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-11-21 16:18:55,506 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:18:55,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:55,506 INFO L85 PathProgramCache]: Analyzing trace with hash 400375357, now seen corresponding path program 84 times [2022-11-21 16:18:55,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:55,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442477082] [2022-11-21 16:18:55,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:55,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:55,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 261 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:56,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:56,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442477082] [2022-11-21 16:18:56,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442477082] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:18:56,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130914458] [2022-11-21 16:18:56,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:18:56,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:18:56,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:18:56,155 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:18:56,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-11-21 16:18:56,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-11-21 16:18:56,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:18:56,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-21 16:18:56,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:18:57,450 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 301 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:57,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:18:58,094 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 301 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:58,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130914458] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:18:58,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:18:58,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 63 [2022-11-21 16:18:58,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47120670] [2022-11-21 16:18:58,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:18:58,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-21 16:18:58,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:58,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-21 16:18:58,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=3231, Unknown=0, NotChecked=0, Total=3906 [2022-11-21 16:18:58,097 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:19:06,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:19:06,461 INFO L93 Difference]: Finished difference Result 558 states and 582 transitions. [2022-11-21 16:19:06,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-21 16:19:06,462 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 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 67 [2022-11-21 16:19:06,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:19:06,463 INFO L225 Difference]: With dead ends: 558 [2022-11-21 16:19:06,463 INFO L226 Difference]: Without dead ends: 509 [2022-11-21 16:19:06,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 75 SyntacticMatches, 31 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9369 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3789, Invalid=18263, Unknown=0, NotChecked=0, Total=22052 [2022-11-21 16:19:06,464 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 456 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:19:06,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 391 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:19:06,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-11-21 16:19:07,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 97. [2022-11-21 16:19:07,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:19:07,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-21 16:19:07,293 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-11-21 16:19:07,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:19:07,294 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-21 16:19:07,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:19:07,294 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-21 16:19:07,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-21 16:19:07,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:19:07,294 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:19:07,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-11-21 16:19:07,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-11-21 16:19:07,495 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:19:07,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:19:07,495 INFO L85 PathProgramCache]: Analyzing trace with hash -406298692, now seen corresponding path program 85 times [2022-11-21 16:19:07,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:19:07,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573643634] [2022-11-21 16:19:07,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:19:07,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:19:07,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:19:08,158 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 261 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:19:08,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:19:08,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573643634] [2022-11-21 16:19:08,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573643634] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:19:08,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414475329] [2022-11-21 16:19:08,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:19:08,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:19:08,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:19:08,161 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:19:08,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-11-21 16:19:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:19:08,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-21 16:19:08,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:19:09,416 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 301 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:19:09,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:19:10,053 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 301 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:19:10,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414475329] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:19:10,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:19:10,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 62 [2022-11-21 16:19:10,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770845294] [2022-11-21 16:19:10,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:19:10,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-21 16:19:10,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:19:10,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-21 16:19:10,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=3129, Unknown=0, NotChecked=0, Total=3782 [2022-11-21 16:19:10,056 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 62 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:19:19,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:19:19,067 INFO L93 Difference]: Finished difference Result 613 states and 638 transitions. [2022-11-21 16:19:19,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-21 16:19:19,068 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 62 states have internal predecessors, (130), 0 states have call successors, (0), 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 67 [2022-11-21 16:19:19,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:19:19,068 INFO L225 Difference]: With dead ends: 613 [2022-11-21 16:19:19,068 INFO L226 Difference]: Without dead ends: 564 [2022-11-21 16:19:19,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 76 SyntacticMatches, 31 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9437 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3841, Invalid=18509, Unknown=0, NotChecked=0, Total=22350 [2022-11-21 16:19:19,070 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 437 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:19:19,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 364 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:19:19,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-11-21 16:19:19,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 97. [2022-11-21 16:19:19,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:19:19,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-21 16:19:19,868 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-11-21 16:19:19,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:19:19,868 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-21 16:19:19,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 62 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:19:19,869 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-21 16:19:19,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-21 16:19:19,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:19:19,869 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:19:19,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-11-21 16:19:20,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-11-21 16:19:20,075 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:19:20,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:19:20,076 INFO L85 PathProgramCache]: Analyzing trace with hash 121868893, now seen corresponding path program 86 times [2022-11-21 16:19:20,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:19:20,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931248444] [2022-11-21 16:19:20,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:19:20,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:19:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:19:20,682 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 261 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:19:20,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:19:20,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931248444] [2022-11-21 16:19:20,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931248444] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:19:20,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896328872] [2022-11-21 16:19:20,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:19:20,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:19:20,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:19:20,685 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:19:20,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-11-21 16:19:20,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:19:20,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:19:20,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-21 16:19:20,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:19:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 301 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:19:21,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:19:22,506 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 301 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:19:22,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896328872] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:19:22,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:19:22,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 61 [2022-11-21 16:19:22,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128495308] [2022-11-21 16:19:22,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:19:22,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-21 16:19:22,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:19:22,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-21 16:19:22,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=3025, Unknown=0, NotChecked=0, Total=3660 [2022-11-21 16:19:22,509 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:19:32,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:19:32,297 INFO L93 Difference]: Finished difference Result 667 states and 693 transitions. [2022-11-21 16:19:32,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-11-21 16:19:32,298 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 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 67 [2022-11-21 16:19:32,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:19:32,299 INFO L225 Difference]: With dead ends: 667 [2022-11-21 16:19:32,299 INFO L226 Difference]: Without dead ends: 618 [2022-11-21 16:19:32,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 77 SyntacticMatches, 31 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9271 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3787, Invalid=18265, Unknown=0, NotChecked=0, Total=22052 [2022-11-21 16:19:32,301 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 439 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:19:32,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 418 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 16:19:32,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-11-21 16:19:33,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 97. [2022-11-21 16:19:33,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:19:33,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-21 16:19:33,103 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-11-21 16:19:33,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:19:33,103 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-21 16:19:33,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:19:33,104 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-21 16:19:33,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-21 16:19:33,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:19:33,104 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:19:33,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-11-21 16:19:33,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-11-21 16:19:33,305 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:19:33,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:19:33,306 INFO L85 PathProgramCache]: Analyzing trace with hash -969472100, now seen corresponding path program 87 times [2022-11-21 16:19:33,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:19:33,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249499591] [2022-11-21 16:19:33,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:19:33,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:19:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:19:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 261 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:19:33,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:19:33,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249499591] [2022-11-21 16:19:33,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249499591] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:19:33,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746419992] [2022-11-21 16:19:33,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:19:33,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:19:33,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:19:33,863 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:19:33,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-11-21 16:19:33,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-11-21 16:19:33,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:19:33,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-21 16:19:33,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:19:34,867 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 301 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:19:34,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:19:35,384 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 301 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:19:35,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746419992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:19:35,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:19:35,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 60 [2022-11-21 16:19:35,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626578334] [2022-11-21 16:19:35,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:19:35,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-21 16:19:35,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:19:35,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-21 16:19:35,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=2919, Unknown=0, NotChecked=0, Total=3540 [2022-11-21 16:19:35,387 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 60 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 60 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:19:44,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:19:44,383 INFO L93 Difference]: Finished difference Result 720 states and 747 transitions. [2022-11-21 16:19:44,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-21 16:19:44,383 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 60 states have internal predecessors, (128), 0 states have call successors, (0), 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 67 [2022-11-21 16:19:44,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:19:44,384 INFO L225 Difference]: With dead ends: 720 [2022-11-21 16:19:44,384 INFO L226 Difference]: Without dead ends: 671 [2022-11-21 16:19:44,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 78 SyntacticMatches, 31 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8868 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3630, Invalid=17540, Unknown=0, NotChecked=0, Total=21170 [2022-11-21 16:19:44,386 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 648 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:19:44,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [648 Valid, 319 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:19:44,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-11-21 16:19:45,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 97. [2022-11-21 16:19:45,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:19:45,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-21 16:19:45,250 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-11-21 16:19:45,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:19:45,250 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-21 16:19:45,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 60 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:19:45,250 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-21 16:19:45,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-21 16:19:45,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:19:45,251 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:19:45,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-11-21 16:19:45,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-11-21 16:19:45,452 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:19:45,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:19:45,452 INFO L85 PathProgramCache]: Analyzing trace with hash 242249341, now seen corresponding path program 88 times [2022-11-21 16:19:45,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:19:45,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960801192] [2022-11-21 16:19:45,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:19:45,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:19:45,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:19:46,044 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 261 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:19:46,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:19:46,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960801192] [2022-11-21 16:19:46,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960801192] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:19:46,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258747792] [2022-11-21 16:19:46,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:19:46,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:19:46,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:19:46,047 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:19:46,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-11-21 16:19:46,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:19:46,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:19:46,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-21 16:19:46,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:19:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 301 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:19:47,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:19:47,795 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 301 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:19:47,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258747792] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:19:47,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:19:47,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 59 [2022-11-21 16:19:47,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769602696] [2022-11-21 16:19:47,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:19:47,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-21 16:19:47,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:19:47,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-21 16:19:47,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=2811, Unknown=0, NotChecked=0, Total=3422 [2022-11-21 16:19:47,798 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:19:57,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:19:57,921 INFO L93 Difference]: Finished difference Result 772 states and 800 transitions. [2022-11-21 16:19:57,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-21 16:19:57,921 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 states have internal predecessors, (127), 0 states have call successors, (0), 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 67 [2022-11-21 16:19:57,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:19:57,922 INFO L225 Difference]: With dead ends: 772 [2022-11-21 16:19:57,922 INFO L226 Difference]: Without dead ends: 723 [2022-11-21 16:19:57,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 79 SyntacticMatches, 31 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8236 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3379, Invalid=16361, Unknown=0, NotChecked=0, Total=19740 [2022-11-21 16:19:57,924 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 452 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:19:57,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 386 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:19:57,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-11-21 16:19:58,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 97. [2022-11-21 16:19:58,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:19:58,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-21 16:19:58,805 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-11-21 16:19:58,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:19:58,805 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-21 16:19:58,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:19:58,805 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-21 16:19:58,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-21 16:19:58,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:19:58,806 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:19:58,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-11-21 16:19:59,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-11-21 16:19:59,006 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:19:59,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:19:59,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1242683524, now seen corresponding path program 89 times [2022-11-21 16:19:59,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:19:59,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604479986] [2022-11-21 16:19:59,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:19:59,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:19:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:19:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 261 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:19:59,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:19:59,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604479986] [2022-11-21 16:19:59,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604479986] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:19:59,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574377309] [2022-11-21 16:19:59,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:19:59,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:19:59,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:19:59,607 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:19:59,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-11-21 16:19:59,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-11-21 16:19:59,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:19:59,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-21 16:19:59,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:20:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 301 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:20:00,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:20:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 301 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:20:01,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574377309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:20:01,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:20:01,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 58 [2022-11-21 16:20:01,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656689326] [2022-11-21 16:20:01,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:20:01,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-21 16:20:01,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:20:01,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-21 16:20:01,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=2701, Unknown=0, NotChecked=0, Total=3306 [2022-11-21 16:20:01,132 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 58 states, 58 states have (on average 2.1724137931034484) internal successors, (126), 58 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:20:11,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:20:11,467 INFO L93 Difference]: Finished difference Result 823 states and 852 transitions. [2022-11-21 16:20:11,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-11-21 16:20:11,467 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1724137931034484) internal successors, (126), 58 states have internal predecessors, (126), 0 states have call successors, (0), 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 67 [2022-11-21 16:20:11,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:20:11,469 INFO L225 Difference]: With dead ends: 823 [2022-11-21 16:20:11,469 INFO L226 Difference]: Without dead ends: 774 [2022-11-21 16:20:11,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 80 SyntacticMatches, 31 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7395 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3049, Invalid=14773, Unknown=0, NotChecked=0, Total=17822 [2022-11-21 16:20:11,470 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 623 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:20:11,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 342 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:20:11,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-11-21 16:20:12,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 97. [2022-11-21 16:20:12,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:20:12,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-21 16:20:12,299 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-11-21 16:20:12,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:20:12,299 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-21 16:20:12,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.1724137931034484) internal successors, (126), 58 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:20:12,299 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-21 16:20:12,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-21 16:20:12,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:20:12,300 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:20:12,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-11-21 16:20:12,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:20:12,500 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:20:12,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:20:12,501 INFO L85 PathProgramCache]: Analyzing trace with hash -43658595, now seen corresponding path program 90 times [2022-11-21 16:20:12,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:20:12,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170525529] [2022-11-21 16:20:12,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:20:12,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:20:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:20:13,147 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 261 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:20:13,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:20:13,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170525529] [2022-11-21 16:20:13,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170525529] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:20:13,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788909772] [2022-11-21 16:20:13,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:20:13,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:20:13,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:20:13,149 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:20:13,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-11-21 16:20:13,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-11-21 16:20:13,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:20:13,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-21 16:20:13,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:20:14,269 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 301 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:20:14,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:20:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 301 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:20:14,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788909772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:20:14,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:20:14,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 57 [2022-11-21 16:20:14,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364274815] [2022-11-21 16:20:14,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:20:14,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-21 16:20:14,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:20:14,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-21 16:20:14,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=2589, Unknown=0, NotChecked=0, Total=3192 [2022-11-21 16:20:14,879 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 57 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:20:25,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:20:25,640 INFO L93 Difference]: Finished difference Result 873 states and 903 transitions. [2022-11-21 16:20:25,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-21 16:20:25,641 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 57 states have internal predecessors, (125), 0 states have call successors, (0), 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 67 [2022-11-21 16:20:25,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:20:25,642 INFO L225 Difference]: With dead ends: 873 [2022-11-21 16:20:25,642 INFO L226 Difference]: Without dead ends: 824 [2022-11-21 16:20:25,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 81 SyntacticMatches, 31 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6377 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2661, Invalid=12839, Unknown=0, NotChecked=0, Total=15500 [2022-11-21 16:20:25,643 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 494 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:20:25,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 411 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:20:25,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-11-21 16:20:26,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 97. [2022-11-21 16:20:26,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:20:26,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-21 16:20:26,479 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-11-21 16:20:26,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:20:26,479 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-21 16:20:26,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 57 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:20:26,480 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-21 16:20:26,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-21 16:20:26,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:20:26,480 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:20:26,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-11-21 16:20:26,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:20:26,681 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:20:26,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:20:26,681 INFO L85 PathProgramCache]: Analyzing trace with hash -559169700, now seen corresponding path program 91 times [2022-11-21 16:20:26,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:20:26,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349422867] [2022-11-21 16:20:26,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:20:26,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:20:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:20:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 261 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:20:27,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:20:27,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349422867] [2022-11-21 16:20:27,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349422867] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:20:27,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842188744] [2022-11-21 16:20:27,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:20:27,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:20:27,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:20:27,387 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:20:27,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-11-21 16:20:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:20:27,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-21 16:20:27,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:20:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 301 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:20:28,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:20:29,060 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 301 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:20:29,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842188744] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:20:29,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:20:29,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 56 [2022-11-21 16:20:29,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616251867] [2022-11-21 16:20:29,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:20:29,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-21 16:20:29,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:20:29,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-21 16:20:29,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=2475, Unknown=0, NotChecked=0, Total=3080 [2022-11-21 16:20:29,063 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 56 states, 56 states have (on average 2.2142857142857144) internal successors, (124), 56 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:20:40,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:20:40,138 INFO L93 Difference]: Finished difference Result 922 states and 953 transitions. [2022-11-21 16:20:40,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-21 16:20:40,138 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.2142857142857144) internal successors, (124), 56 states have internal predecessors, (124), 0 states have call successors, (0), 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 67 [2022-11-21 16:20:40,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:20:40,139 INFO L225 Difference]: With dead ends: 922 [2022-11-21 16:20:40,139 INFO L226 Difference]: Without dead ends: 873 [2022-11-21 16:20:40,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 82 SyntacticMatches, 31 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5194 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2242, Invalid=10640, Unknown=0, NotChecked=0, Total=12882 [2022-11-21 16:20:40,140 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 680 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:20:40,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [680 Valid, 371 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:20:40,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-11-21 16:20:40,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 97. [2022-11-21 16:20:40,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:20:40,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-21 16:20:40,988 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-11-21 16:20:40,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:20:40,988 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-21 16:20:40,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.2142857142857144) internal successors, (124), 56 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:20:40,988 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-21 16:20:40,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-21 16:20:40,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:20:40,989 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:20:40,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-11-21 16:20:41,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2022-11-21 16:20:41,189 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:20:41,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:20:41,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1129988419, now seen corresponding path program 14 times [2022-11-21 16:20:41,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:20:41,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377449304] [2022-11-21 16:20:41,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:20:41,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:20:41,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:20:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 261 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:20:41,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:20:41,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377449304] [2022-11-21 16:20:41,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377449304] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:20:41,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181265411] [2022-11-21 16:20:41,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:20:41,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:20:41,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:20:41,841 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:20:41,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-11-21 16:20:41,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:20:41,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:20:41,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-21 16:20:41,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:20:42,926 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:20:42,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:20:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:20:43,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181265411] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:20:43,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:20:43,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 55 [2022-11-21 16:20:43,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553772512] [2022-11-21 16:20:43,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:20:43,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-21 16:20:43,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:20:43,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-21 16:20:43,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=2359, Unknown=0, NotChecked=0, Total=2970 [2022-11-21 16:20:43,571 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 55 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:20:54,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:20:54,740 INFO L93 Difference]: Finished difference Result 973 states and 1006 transitions. [2022-11-21 16:20:54,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-21 16:20:54,741 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 55 states have internal predecessors, (123), 0 states have call successors, (0), 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 67 [2022-11-21 16:20:54,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:20:54,742 INFO L225 Difference]: With dead ends: 973 [2022-11-21 16:20:54,742 INFO L226 Difference]: Without dead ends: 924 [2022-11-21 16:20:54,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 83 SyntacticMatches, 31 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3971 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1841, Invalid=8259, Unknown=0, NotChecked=0, Total=10100 [2022-11-21 16:20:54,743 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 537 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:20:54,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 356 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:20:54,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-11-21 16:20:55,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 99. [2022-11-21 16:20:55,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.183673469387755) internal successors, (116), 98 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:20:55,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2022-11-21 16:20:55,486 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 67 [2022-11-21 16:20:55,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:20:55,486 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2022-11-21 16:20:55,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 55 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:20:55,486 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2022-11-21 16:20:55,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-21 16:20:55,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:20:55,486 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:20:55,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-11-21 16:20:55,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:20:55,687 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:20:55,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:20:55,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1945821609, now seen corresponding path program 28 times [2022-11-21 16:20:55,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:20:55,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281155486] [2022-11-21 16:20:55,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:20:55,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:20:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:20:55,994 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 105 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:20:55,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:20:55,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281155486] [2022-11-21 16:20:55,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281155486] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:20:55,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670973900] [2022-11-21 16:20:55,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:20:55,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:20:55,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:20:55,997 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:20:55,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-11-21 16:20:56,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:20:56,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:20:56,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-21 16:20:56,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:20:56,170 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:20:56,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:20:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:20:56,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670973900] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:20:56,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:20:56,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 21 [2022-11-21 16:20:56,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143848436] [2022-11-21 16:20:56,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:20:56,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-21 16:20:56,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:20:56,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-21 16:20:56,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2022-11-21 16:20:56,476 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:20:57,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:20:57,736 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2022-11-21 16:20:57,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-21 16:20:57,737 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-21 16:20:57,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:20:57,737 INFO L225 Difference]: With dead ends: 110 [2022-11-21 16:20:57,737 INFO L226 Difference]: Without dead ends: 108 [2022-11-21 16:20:57,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 118 SyntacticMatches, 30 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=501, Invalid=905, Unknown=0, NotChecked=0, Total=1406 [2022-11-21 16:20:57,738 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 106 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:20:57,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 242 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:20:57,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-21 16:20:58,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 102. [2022-11-21 16:20:58,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 101 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:20:58,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2022-11-21 16:20:58,617 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 68 [2022-11-21 16:20:58,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:20:58,617 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2022-11-21 16:20:58,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:20:58,617 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2022-11-21 16:20:58,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-21 16:20:58,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:20:58,618 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:20:58,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-11-21 16:20:58,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-11-21 16:20:58,818 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:20:58,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:20:58,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1206883513, now seen corresponding path program 29 times [2022-11-21 16:20:58,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:20:58,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508472113] [2022-11-21 16:20:58,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:20:58,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:20:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:20:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 302 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:20:59,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:20:59,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508472113] [2022-11-21 16:20:59,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508472113] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:20:59,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796771505] [2022-11-21 16:20:59,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:20:59,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:20:59,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:20:59,570 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:20:59,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-11-21 16:20:59,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-11-21 16:20:59,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:20:59,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-21 16:20:59,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:21:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:21:01,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:21:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:21:01,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796771505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:21:01,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:21:01,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 73 [2022-11-21 16:21:01,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324475740] [2022-11-21 16:21:01,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:21:01,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-21 16:21:01,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:21:01,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-21 16:21:01,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=997, Invalid=4259, Unknown=0, NotChecked=0, Total=5256 [2022-11-21 16:21:01,658 INFO L87 Difference]: Start difference. First operand 102 states and 119 transitions. Second operand has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:21:04,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:21:04,530 INFO L93 Difference]: Finished difference Result 220 states and 239 transitions. [2022-11-21 16:21:04,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-21 16:21:04,531 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 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 71 [2022-11-21 16:21:04,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:21:04,531 INFO L225 Difference]: With dead ends: 220 [2022-11-21 16:21:04,531 INFO L226 Difference]: Without dead ends: 168 [2022-11-21 16:21:04,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 73 SyntacticMatches, 33 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5996 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2072, Invalid=9270, Unknown=0, NotChecked=0, Total=11342 [2022-11-21 16:21:04,532 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 77 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:21:04,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 308 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:21:04,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-21 16:21:05,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 103. [2022-11-21 16:21:05,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:21:05,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-21 16:21:05,540 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-21 16:21:05,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:21:05,540 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-21 16:21:05,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:21:05,541 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-21 16:21:05,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-21 16:21:05,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:21:05,541 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:21:05,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-11-21 16:21:05,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-11-21 16:21:05,742 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:21:05,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:21:05,742 INFO L85 PathProgramCache]: Analyzing trace with hash -962976904, now seen corresponding path program 92 times [2022-11-21 16:21:05,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:21:05,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696595198] [2022-11-21 16:21:05,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:21:05,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:21:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:21:06,507 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 302 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:21:06,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:21:06,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696595198] [2022-11-21 16:21:06,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696595198] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:21:06,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60682237] [2022-11-21 16:21:06,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:21:06,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:21:06,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:21:06,508 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:21:06,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-11-21 16:21:06,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:21:06,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:21:06,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-21 16:21:06,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:21:08,039 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 345 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:21:08,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:21:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 345 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:21:08,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60682237] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:21:08,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:21:08,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 72 [2022-11-21 16:21:08,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766369804] [2022-11-21 16:21:08,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:21:08,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-21 16:21:08,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:21:08,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-21 16:21:08,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=4164, Unknown=0, NotChecked=0, Total=5112 [2022-11-21 16:21:08,777 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 72 states, 72 states have (on average 2.0) internal successors, (144), 72 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:21:13,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:21:13,854 INFO L93 Difference]: Finished difference Result 285 states and 305 transitions. [2022-11-21 16:21:13,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-21 16:21:13,854 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0) internal successors, (144), 72 states have internal predecessors, (144), 0 states have call successors, (0), 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 71 [2022-11-21 16:21:13,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:21:13,855 INFO L225 Difference]: With dead ends: 285 [2022-11-21 16:21:13,855 INFO L226 Difference]: Without dead ends: 233 [2022-11-21 16:21:13,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 74 SyntacticMatches, 33 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7058 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2530, Invalid=11990, Unknown=0, NotChecked=0, Total=14520 [2022-11-21 16:21:13,857 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 151 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:21:13,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 377 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 16:21:13,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-21 16:21:14,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 103. [2022-11-21 16:21:14,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:21:14,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-21 16:21:14,909 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-21 16:21:14,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:21:14,910 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-21 16:21:14,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0) internal successors, (144), 72 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:21:14,910 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-21 16:21:14,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-21 16:21:14,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:21:14,911 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:21:14,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-11-21 16:21:15,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-11-21 16:21:15,118 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:21:15,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:21:15,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1460879577, now seen corresponding path program 93 times [2022-11-21 16:21:15,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:21:15,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854159519] [2022-11-21 16:21:15,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:21:15,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:21:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:21:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 302 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:21:15,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:21:15,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854159519] [2022-11-21 16:21:15,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854159519] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:21:15,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647266381] [2022-11-21 16:21:15,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:21:15,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:21:15,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:21:15,888 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:21:15,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-11-21 16:21:15,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-21 16:21:15,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:21:16,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-21 16:21:16,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:21:17,487 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 345 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:21:17,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:21:18,211 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 345 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:21:18,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647266381] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:21:18,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:21:18,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 71 [2022-11-21 16:21:18,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772200795] [2022-11-21 16:21:18,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:21:18,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-21 16:21:18,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:21:18,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-21 16:21:18,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=4067, Unknown=0, NotChecked=0, Total=4970 [2022-11-21 16:21:18,214 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 71 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:21:24,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:21:24,375 INFO L93 Difference]: Finished difference Result 349 states and 370 transitions. [2022-11-21 16:21:24,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-21 16:21:24,375 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 71 states have internal predecessors, (143), 0 states have call successors, (0), 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 71 [2022-11-21 16:21:24,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:21:24,376 INFO L225 Difference]: With dead ends: 349 [2022-11-21 16:21:24,376 INFO L226 Difference]: Without dead ends: 297 [2022-11-21 16:21:24,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 75 SyntacticMatches, 33 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8102 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3015, Invalid=14541, Unknown=0, NotChecked=0, Total=17556 [2022-11-21 16:21:24,378 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 219 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:21:24,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 345 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:21:24,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-11-21 16:21:25,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 103. [2022-11-21 16:21:25,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:21:25,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-21 16:21:25,448 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-21 16:21:25,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:21:25,449 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-21 16:21:25,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 71 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:21:25,449 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-21 16:21:25,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-21 16:21:25,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:21:25,449 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:21:25,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-11-21 16:21:25,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:21:25,650 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:21:25,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:21:25,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1816163160, now seen corresponding path program 94 times [2022-11-21 16:21:25,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:21:25,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667206478] [2022-11-21 16:21:25,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:21:25,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:21:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:21:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 302 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:21:26,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:21:26,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667206478] [2022-11-21 16:21:26,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667206478] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:21:26,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909440248] [2022-11-21 16:21:26,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:21:26,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:21:26,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:21:26,388 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:21:26,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-11-21 16:21:26,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:21:26,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:21:26,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-21 16:21:26,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:21:27,860 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 345 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:21:27,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:21:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 345 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:21:28,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909440248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:21:28,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:21:28,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 70 [2022-11-21 16:21:28,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866081519] [2022-11-21 16:21:28,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:21:28,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-21 16:21:28,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:21:28,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-21 16:21:28,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=862, Invalid=3968, Unknown=0, NotChecked=0, Total=4830 [2022-11-21 16:21:28,576 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:21:36,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:21:36,140 INFO L93 Difference]: Finished difference Result 412 states and 434 transitions. [2022-11-21 16:21:36,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-21 16:21:36,140 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 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 71 [2022-11-21 16:21:36,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:21:36,141 INFO L225 Difference]: With dead ends: 412 [2022-11-21 16:21:36,141 INFO L226 Difference]: Without dead ends: 360 [2022-11-21 16:21:36,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 76 SyntacticMatches, 33 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9065 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3474, Invalid=16832, Unknown=0, NotChecked=0, Total=20306 [2022-11-21 16:21:36,142 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 253 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:21:36,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 408 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:21:36,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-11-21 16:21:37,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 103. [2022-11-21 16:21:37,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:21:37,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-21 16:21:37,215 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-21 16:21:37,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:21:37,215 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-21 16:21:37,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:21:37,215 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-21 16:21:37,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-21 16:21:37,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:21:37,216 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:21:37,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-11-21 16:21:37,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:21:37,417 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:21:37,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:21:37,417 INFO L85 PathProgramCache]: Analyzing trace with hash 2104718585, now seen corresponding path program 95 times [2022-11-21 16:21:37,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:21:37,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736263190] [2022-11-21 16:21:37,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:21:37,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:21:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:21:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 302 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:21:38,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:21:38,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736263190] [2022-11-21 16:21:38,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736263190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:21:38,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658490505] [2022-11-21 16:21:38,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:21:38,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:21:38,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:21:38,165 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:21:38,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-11-21 16:21:38,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-11-21 16:21:38,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:21:38,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-21 16:21:38,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:21:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 345 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:21:39,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:21:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 345 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:21:40,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658490505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:21:40,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:21:40,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 69 [2022-11-21 16:21:40,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823691266] [2022-11-21 16:21:40,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:21:40,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-21 16:21:40,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:21:40,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-21 16:21:40,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=3867, Unknown=0, NotChecked=0, Total=4692 [2022-11-21 16:21:40,367 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:21:49,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:21:49,337 INFO L93 Difference]: Finished difference Result 474 states and 497 transitions. [2022-11-21 16:21:49,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-11-21 16:21:49,337 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-21 16:21:49,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:21:49,338 INFO L225 Difference]: With dead ends: 474 [2022-11-21 16:21:49,338 INFO L226 Difference]: Without dead ends: 422 [2022-11-21 16:21:49,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 77 SyntacticMatches, 33 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9902 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3877, Invalid=18773, Unknown=0, NotChecked=0, Total=22650 [2022-11-21 16:21:49,339 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 287 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:21:49,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 389 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 16:21:49,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-11-21 16:21:50,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 103. [2022-11-21 16:21:50,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:21:50,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-21 16:21:50,374 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-21 16:21:50,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:21:50,374 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-21 16:21:50,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:21:50,374 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-21 16:21:50,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-21 16:21:50,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:21:50,375 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:21:50,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-11-21 16:21:50,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-11-21 16:21:50,576 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:21:50,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:21:50,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1559837496, now seen corresponding path program 96 times [2022-11-21 16:21:50,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:21:50,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155686968] [2022-11-21 16:21:50,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:21:50,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:21:50,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:21:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 302 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:21:51,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:21:51,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155686968] [2022-11-21 16:21:51,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155686968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:21:51,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147470775] [2022-11-21 16:21:51,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:21:51,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:21:51,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:21:51,299 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:21:51,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-11-21 16:21:51,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-11-21 16:21:51,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:21:51,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-21 16:21:51,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:21:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 345 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:21:52,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:21:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 345 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:21:53,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147470775] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:21:53,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:21:53,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 68 [2022-11-21 16:21:53,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688098824] [2022-11-21 16:21:53,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:21:53,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-21 16:21:53,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:21:53,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-21 16:21:53,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=792, Invalid=3764, Unknown=0, NotChecked=0, Total=4556 [2022-11-21 16:21:53,377 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:22:02,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:22:02,994 INFO L93 Difference]: Finished difference Result 535 states and 559 transitions. [2022-11-21 16:22:02,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-21 16:22:02,995 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 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 71 [2022-11-21 16:22:02,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:22:02,995 INFO L225 Difference]: With dead ends: 535 [2022-11-21 16:22:02,995 INFO L226 Difference]: Without dead ends: 483 [2022-11-21 16:22:02,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 78 SyntacticMatches, 33 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10563 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4200, Invalid=20292, Unknown=0, NotChecked=0, Total=24492 [2022-11-21 16:22:02,997 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 355 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:22:02,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 403 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:22:02,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-11-21 16:22:04,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 103. [2022-11-21 16:22:04,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:22:04,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-21 16:22:04,006 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-21 16:22:04,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:22:04,006 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-21 16:22:04,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:22:04,006 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-21 16:22:04,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-21 16:22:04,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:22:04,007 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:22:04,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-11-21 16:22:04,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:22:04,208 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:22:04,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:22:04,208 INFO L85 PathProgramCache]: Analyzing trace with hash -258854631, now seen corresponding path program 97 times [2022-11-21 16:22:04,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:22:04,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198054606] [2022-11-21 16:22:04,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:22:04,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:22:04,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:22:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 302 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:22:04,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:22:04,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198054606] [2022-11-21 16:22:04,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198054606] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:22:04,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210107213] [2022-11-21 16:22:04,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:22:04,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:22:04,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:22:04,867 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:22:04,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-11-21 16:22:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:22:04,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-21 16:22:04,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:22:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 345 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:22:06,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:22:06,955 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 345 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:22:06,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210107213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:22:06,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:22:06,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 67 [2022-11-21 16:22:06,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773592436] [2022-11-21 16:22:06,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:22:06,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-21 16:22:06,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:22:06,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-21 16:22:06,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=763, Invalid=3659, Unknown=0, NotChecked=0, Total=4422 [2022-11-21 16:22:06,957 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 67 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:22:18,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:22:18,058 INFO L93 Difference]: Finished difference Result 595 states and 620 transitions. [2022-11-21 16:22:18,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-11-21 16:22:18,058 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 67 states have internal predecessors, (139), 0 states have call successors, (0), 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 71 [2022-11-21 16:22:18,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:22:18,059 INFO L225 Difference]: With dead ends: 595 [2022-11-21 16:22:18,060 INFO L226 Difference]: Without dead ends: 543 [2022-11-21 16:22:18,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 79 SyntacticMatches, 33 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11010 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4425, Invalid=21335, Unknown=0, NotChecked=0, Total=25760 [2022-11-21 16:22:18,062 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 584 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:22:18,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 263 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:22:18,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-11-21 16:22:19,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 103. [2022-11-21 16:22:19,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:22:19,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-21 16:22:19,145 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-21 16:22:19,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:22:19,145 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-21 16:22:19,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 67 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:22:19,145 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-21 16:22:19,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-21 16:22:19,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:22:19,145 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:22:19,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-11-21 16:22:19,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:22:19,346 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:22:19,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:22:19,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1425900776, now seen corresponding path program 98 times [2022-11-21 16:22:19,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:22:19,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175361645] [2022-11-21 16:22:19,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:22:19,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:22:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:22:20,001 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 302 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:22:20,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:22:20,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175361645] [2022-11-21 16:22:20,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175361645] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:22:20,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888641008] [2022-11-21 16:22:20,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:22:20,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:22:20,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:22:20,003 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:22:20,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-11-21 16:22:20,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:22:20,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:22:20,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-21 16:22:20,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:22:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 345 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:22:21,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:22:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 345 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:22:22,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888641008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:22:22,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:22:22,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 66 [2022-11-21 16:22:22,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046711295] [2022-11-21 16:22:22,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:22:22,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-21 16:22:22,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:22:22,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-21 16:22:22,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=738, Invalid=3552, Unknown=0, NotChecked=0, Total=4290 [2022-11-21 16:22:22,048 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:22:32,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:22:32,954 INFO L93 Difference]: Finished difference Result 654 states and 680 transitions. [2022-11-21 16:22:32,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-11-21 16:22:32,955 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 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 71 [2022-11-21 16:22:32,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:22:32,956 INFO L225 Difference]: With dead ends: 654 [2022-11-21 16:22:32,956 INFO L226 Difference]: Without dead ends: 602 [2022-11-21 16:22:32,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 80 SyntacticMatches, 33 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11217 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4540, Invalid=21866, Unknown=0, NotChecked=0, Total=26406 [2022-11-21 16:22:32,957 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 416 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:22:32,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 391 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:22:32,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2022-11-21 16:22:34,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 103. [2022-11-21 16:22:34,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:22:34,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-21 16:22:34,106 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-21 16:22:34,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:22:34,107 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-21 16:22:34,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:22:34,107 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-21 16:22:34,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-21 16:22:34,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:22:34,107 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:22:34,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-11-21 16:22:34,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:22:34,308 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:22:34,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:22:34,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1584493881, now seen corresponding path program 99 times [2022-11-21 16:22:34,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:22:34,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394647841] [2022-11-21 16:22:34,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:22:34,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:22:34,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:22:35,066 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 302 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:22:35,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:22:35,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394647841] [2022-11-21 16:22:35,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394647841] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:22:35,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766198286] [2022-11-21 16:22:35,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:22:35,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:22:35,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:22:35,068 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:22:35,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-11-21 16:22:35,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-21 16:22:35,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:22:35,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-21 16:22:35,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:22:36,367 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 345 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:22:36,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:22:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 345 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:22:36,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766198286] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:22:36,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:22:36,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 65 [2022-11-21 16:22:36,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962729452] [2022-11-21 16:22:36,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:22:36,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-21 16:22:36,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:22:36,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-21 16:22:36,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=717, Invalid=3443, Unknown=0, NotChecked=0, Total=4160 [2022-11-21 16:22:36,997 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:22:48,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:22:48,981 INFO L93 Difference]: Finished difference Result 712 states and 739 transitions. [2022-11-21 16:22:48,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-11-21 16:22:48,981 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 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 71 [2022-11-21 16:22:48,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:22:48,982 INFO L225 Difference]: With dead ends: 712 [2022-11-21 16:22:48,982 INFO L226 Difference]: Without dead ends: 660 [2022-11-21 16:22:48,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 81 SyntacticMatches, 33 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11170 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4539, Invalid=21867, Unknown=0, NotChecked=0, Total=26406 [2022-11-21 16:22:48,983 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 456 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:22:48,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 391 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:22:48,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-11-21 16:22:50,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 103. [2022-11-21 16:22:50,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:22:50,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-21 16:22:50,115 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-21 16:22:50,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:22:50,115 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-21 16:22:50,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:22:50,116 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-21 16:22:50,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-21 16:22:50,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:22:50,116 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:22:50,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-11-21 16:22:50,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:22:50,317 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:22:50,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:22:50,317 INFO L85 PathProgramCache]: Analyzing trace with hash -535153928, now seen corresponding path program 100 times [2022-11-21 16:22:50,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:22:50,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541177908] [2022-11-21 16:22:50,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:22:50,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:22:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:22:51,059 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 302 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:22:51,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:22:51,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541177908] [2022-11-21 16:22:51,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541177908] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:22:51,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895204812] [2022-11-21 16:22:51,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:22:51,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:22:51,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:22:51,061 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:22:51,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-11-21 16:22:51,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:22:51,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:22:51,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-21 16:22:51,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:22:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 345 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:22:52,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:22:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 345 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:22:53,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895204812] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:22:53,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:22:53,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 64 [2022-11-21 16:22:53,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281831797] [2022-11-21 16:22:53,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:22:53,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-21 16:22:53,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:22:53,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-21 16:22:53,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=700, Invalid=3332, Unknown=0, NotChecked=0, Total=4032 [2022-11-21 16:22:53,071 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 64 states, 64 states have (on average 2.125) internal successors, (136), 64 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:06,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:23:06,424 INFO L93 Difference]: Finished difference Result 769 states and 797 transitions. [2022-11-21 16:23:06,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-11-21 16:23:06,424 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.125) internal successors, (136), 64 states have internal predecessors, (136), 0 states have call successors, (0), 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 71 [2022-11-21 16:23:06,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:23:06,425 INFO L225 Difference]: With dead ends: 769 [2022-11-21 16:23:06,425 INFO L226 Difference]: Without dead ends: 717 [2022-11-21 16:23:06,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 82 SyntacticMatches, 33 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10863 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4422, Invalid=21338, Unknown=0, NotChecked=0, Total=25760 [2022-11-21 16:23:06,427 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 624 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:23:06,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 374 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:23:06,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-11-21 16:23:07,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 103. [2022-11-21 16:23:07,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:07,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-21 16:23:07,599 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-21 16:23:07,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:23:07,599 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-21 16:23:07,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.125) internal successors, (136), 64 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:07,599 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-21 16:23:07,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-21 16:23:07,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:23:07,600 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:23:07,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-11-21 16:23:07,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-11-21 16:23:07,800 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:23:07,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:23:07,801 INFO L85 PathProgramCache]: Analyzing trace with hash 227754329, now seen corresponding path program 101 times [2022-11-21 16:23:07,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:23:07,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496648857] [2022-11-21 16:23:07,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:07,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:23:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:23:08,541 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 302 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:08,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:23:08,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496648857] [2022-11-21 16:23:08,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496648857] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:23:08,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484711983] [2022-11-21 16:23:08,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:23:08,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:23:08,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:23:08,543 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:23:08,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-11-21 16:23:08,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-11-21 16:23:08,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:23:08,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-21 16:23:08,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:23:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 345 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:09,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:23:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 345 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:10,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484711983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:23:10,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:23:10,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 63 [2022-11-21 16:23:10,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854852883] [2022-11-21 16:23:10,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:23:10,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-21 16:23:10,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:23:10,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-21 16:23:10,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=687, Invalid=3219, Unknown=0, NotChecked=0, Total=3906 [2022-11-21 16:23:10,503 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 63 states, 63 states have (on average 2.142857142857143) internal successors, (135), 63 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:24,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:23:24,448 INFO L93 Difference]: Finished difference Result 825 states and 854 transitions. [2022-11-21 16:23:24,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-11-21 16:23:24,448 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.142857142857143) internal successors, (135), 63 states have internal predecessors, (135), 0 states have call successors, (0), 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 71 [2022-11-21 16:23:24,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:23:24,449 INFO L225 Difference]: With dead ends: 825 [2022-11-21 16:23:24,449 INFO L226 Difference]: Without dead ends: 773 [2022-11-21 16:23:24,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 83 SyntacticMatches, 33 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10298 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4195, Invalid=20297, Unknown=0, NotChecked=0, Total=24492 [2022-11-21 16:23:24,451 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 647 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:23:24,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [647 Valid, 384 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:23:24,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-11-21 16:23:25,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 103. [2022-11-21 16:23:25,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:25,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-21 16:23:25,678 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-21 16:23:25,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:23:25,678 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-21 16:23:25,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.142857142857143) internal successors, (135), 63 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:25,679 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-21 16:23:25,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-21 16:23:25,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:23:25,682 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:23:25,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-11-21 16:23:25,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-11-21 16:23:25,890 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:23:25,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:23:25,891 INFO L85 PathProgramCache]: Analyzing trace with hash -578919720, now seen corresponding path program 102 times [2022-11-21 16:23:25,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:23:25,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048086339] [2022-11-21 16:23:25,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:25,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:23:25,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:23:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 302 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:26,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:23:26,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048086339] [2022-11-21 16:23:26,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048086339] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:23:26,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672703272] [2022-11-21 16:23:26,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:23:26,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:23:26,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:23:26,641 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:23:26,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-11-21 16:23:26,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-11-21 16:23:26,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:23:26,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-21 16:23:26,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:23:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 345 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:27,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:23:28,673 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 345 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:28,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672703272] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:23:28,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:23:28,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 62 [2022-11-21 16:23:28,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751414443] [2022-11-21 16:23:28,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:23:28,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-21 16:23:28,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:23:28,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-21 16:23:28,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=3104, Unknown=0, NotChecked=0, Total=3782 [2022-11-21 16:23:28,676 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 62 states, 62 states have (on average 2.161290322580645) internal successors, (134), 62 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:42,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:23:42,842 INFO L93 Difference]: Finished difference Result 880 states and 910 transitions. [2022-11-21 16:23:42,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-11-21 16:23:42,843 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.161290322580645) internal successors, (134), 62 states have internal predecessors, (134), 0 states have call successors, (0), 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 71 [2022-11-21 16:23:42,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:23:42,844 INFO L225 Difference]: With dead ends: 880 [2022-11-21 16:23:42,844 INFO L226 Difference]: Without dead ends: 828 [2022-11-21 16:23:42,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 84 SyntacticMatches, 33 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9489 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3870, Invalid=18780, Unknown=0, NotChecked=0, Total=22650 [2022-11-21 16:23:42,847 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 625 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:23:42,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 398 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:23:42,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-11-21 16:23:43,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 103. [2022-11-21 16:23:43,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:43,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-21 16:23:43,957 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-21 16:23:43,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:23:43,958 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-21 16:23:43,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.161290322580645) internal successors, (134), 62 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:43,958 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-21 16:23:43,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-21 16:23:43,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:23:43,958 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:23:43,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-11-21 16:23:44,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-11-21 16:23:44,159 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:23:44,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:23:44,159 INFO L85 PathProgramCache]: Analyzing trace with hash -50752135, now seen corresponding path program 103 times [2022-11-21 16:23:44,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:23:44,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143568756] [2022-11-21 16:23:44,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:44,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:23:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:23:44,880 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 302 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:44,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:23:44,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143568756] [2022-11-21 16:23:44,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143568756] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:23:44,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526800061] [2022-11-21 16:23:44,880 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:23:44,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:23:44,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:23:44,881 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:23:44,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-11-21 16:23:44,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:23:44,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-21 16:23:44,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:23:46,005 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 345 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:46,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:23:46,569 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 345 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:46,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526800061] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:23:46,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:23:46,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 61 [2022-11-21 16:23:46,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249556956] [2022-11-21 16:23:46,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:23:46,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-21 16:23:46,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:23:46,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-21 16:23:46,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=2987, Unknown=0, NotChecked=0, Total=3660 [2022-11-21 16:23:46,571 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 61 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:00,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:24:00,956 INFO L93 Difference]: Finished difference Result 934 states and 965 transitions. [2022-11-21 16:24:00,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-21 16:24:00,956 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 61 states have internal predecessors, (133), 0 states have call successors, (0), 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 71 [2022-11-21 16:24:00,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:24:00,957 INFO L225 Difference]: With dead ends: 934 [2022-11-21 16:24:00,957 INFO L226 Difference]: Without dead ends: 882 [2022-11-21 16:24:00,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 85 SyntacticMatches, 33 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8462 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3465, Invalid=16841, Unknown=0, NotChecked=0, Total=20306 [2022-11-21 16:24:00,958 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 647 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:24:00,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [647 Valid, 425 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:24:00,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2022-11-21 16:24:02,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 103. [2022-11-21 16:24:02,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:02,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-21 16:24:02,136 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-21 16:24:02,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:24:02,136 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-21 16:24:02,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 61 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:02,137 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-21 16:24:02,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-21 16:24:02,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:24:02,137 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:24:02,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-11-21 16:24:02,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147,148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:24:02,338 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:24:02,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:24:02,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1142093128, now seen corresponding path program 104 times [2022-11-21 16:24:02,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:24:02,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989327774] [2022-11-21 16:24:02,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:24:02,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:24:02,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:24:03,091 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 302 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:24:03,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:24:03,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989327774] [2022-11-21 16:24:03,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989327774] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:24:03,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909226841] [2022-11-21 16:24:03,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:24:03,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:24:03,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:24:03,094 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:24:03,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-11-21 16:24:03,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:24:03,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:24:03,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-21 16:24:03,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:24:04,212 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 345 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:24:04,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:24:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 345 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:24:04,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909226841] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:24:04,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:24:04,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 60 [2022-11-21 16:24:04,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347664070] [2022-11-21 16:24:04,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:24:04,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-21 16:24:04,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:24:04,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-21 16:24:04,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=2868, Unknown=0, NotChecked=0, Total=3540 [2022-11-21 16:24:04,881 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 60 states, 60 states have (on average 2.2) internal successors, (132), 60 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:20,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:24:20,016 INFO L93 Difference]: Finished difference Result 987 states and 1019 transitions. [2022-11-21 16:24:20,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-11-21 16:24:20,016 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.2) internal successors, (132), 60 states have internal predecessors, (132), 0 states have call successors, (0), 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 71 [2022-11-21 16:24:20,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:24:20,017 INFO L225 Difference]: With dead ends: 987 [2022-11-21 16:24:20,017 INFO L226 Difference]: Without dead ends: 935 [2022-11-21 16:24:20,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 86 SyntacticMatches, 33 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7255 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3004, Invalid=14552, Unknown=0, NotChecked=0, Total=17556 [2022-11-21 16:24:20,018 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 726 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:24:20,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [726 Valid, 423 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 16:24:20,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2022-11-21 16:24:21,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 103. [2022-11-21 16:24:21,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:21,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-21 16:24:21,238 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-21 16:24:21,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:24:21,238 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-21 16:24:21,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.2) internal successors, (132), 60 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:21,238 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-21 16:24:21,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-21 16:24:21,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:24:21,238 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:24:21,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-11-21 16:24:21,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-11-21 16:24:21,439 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:24:21,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:24:21,439 INFO L85 PathProgramCache]: Analyzing trace with hash 69628313, now seen corresponding path program 105 times [2022-11-21 16:24:21,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:24:21,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155272489] [2022-11-21 16:24:21,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:24:21,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:24:21,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:24:22,187 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 302 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:24:22,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:24:22,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155272489] [2022-11-21 16:24:22,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155272489] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:24:22,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662836342] [2022-11-21 16:24:22,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:24:22,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:24:22,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:24:22,189 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:24:22,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-11-21 16:24:22,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-21 16:24:22,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:24:22,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-21 16:24:22,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:24:23,238 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 345 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:24:23,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:24:23,843 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 345 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:24:23,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662836342] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:24:23,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:24:23,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 59 [2022-11-21 16:24:23,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649765938] [2022-11-21 16:24:23,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:24:23,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-21 16:24:23,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:24:23,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-21 16:24:23,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=2747, Unknown=0, NotChecked=0, Total=3422 [2022-11-21 16:24:23,845 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 59 states, 59 states have (on average 2.2203389830508473) internal successors, (131), 59 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:39,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:24:39,273 INFO L93 Difference]: Finished difference Result 1039 states and 1072 transitions. [2022-11-21 16:24:39,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-21 16:24:39,274 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2203389830508473) internal successors, (131), 59 states have internal predecessors, (131), 0 states have call successors, (0), 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 71 [2022-11-21 16:24:39,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:24:39,275 INFO L225 Difference]: With dead ends: 1039 [2022-11-21 16:24:39,275 INFO L226 Difference]: Without dead ends: 987 [2022-11-21 16:24:39,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 87 SyntacticMatches, 33 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5884 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2517, Invalid=12003, Unknown=0, NotChecked=0, Total=14520 [2022-11-21 16:24:39,276 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 570 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:24:39,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 456 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 16:24:39,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2022-11-21 16:24:40,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 103. [2022-11-21 16:24:40,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:40,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-21 16:24:40,506 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-21 16:24:40,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:24:40,506 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-21 16:24:40,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2203389830508473) internal successors, (131), 59 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:40,506 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-21 16:24:40,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-21 16:24:40,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:24:40,507 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:24:40,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-11-21 16:24:40,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-11-21 16:24:40,707 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:24:40,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:24:40,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1415304552, now seen corresponding path program 15 times [2022-11-21 16:24:40,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:24:40,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514450084] [2022-11-21 16:24:40,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:24:40,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:24:40,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:24:41,455 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 302 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:24:41,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:24:41,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514450084] [2022-11-21 16:24:41,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514450084] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:24:41,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355026021] [2022-11-21 16:24:41,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:24:41,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:24:41,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:24:41,457 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:24:41,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6fa9e9c-923e-4493-9cba-a1a8a1b83906/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-11-21 16:24:41,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-21 16:24:41,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:24:41,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-21 16:24:41,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:24:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:24:42,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:24:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:24:43,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355026021] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:24:43,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:24:43,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 58 [2022-11-21 16:24:43,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067355942] [2022-11-21 16:24:43,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:24:43,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-21 16:24:43,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:24:43,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-21 16:24:43,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=682, Invalid=2624, Unknown=0, NotChecked=0, Total=3306 [2022-11-21 16:24:43,050 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 58 states, 58 states have (on average 2.2413793103448274) internal successors, (130), 58 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:58,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:24:58,890 INFO L93 Difference]: Finished difference Result 1093 states and 1128 transitions. [2022-11-21 16:24:58,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-21 16:24:58,890 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.2413793103448274) internal successors, (130), 58 states have internal predecessors, (130), 0 states have call successors, (0), 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 71 [2022-11-21 16:24:58,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:24:58,891 INFO L225 Difference]: With dead ends: 1093 [2022-11-21 16:24:58,891 INFO L226 Difference]: Without dead ends: 1041 [2022-11-21 16:24:58,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 88 SyntacticMatches, 33 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4484 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2057, Invalid=9285, Unknown=0, NotChecked=0, Total=11342 [2022-11-21 16:24:58,892 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 656 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:24:58,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [656 Valid, 316 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:24:58,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states.