./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/fragtest_simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/fragtest_simple.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash be3b53cc5f9badbf5402cafcfa5766831674eb009261bc7c1bcbe9580aece38e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:51:24,173 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:51:24,176 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:51:24,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:51:24,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:51:24,212 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:51:24,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:51:24,216 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:51:24,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:51:24,219 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:51:24,220 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:51:24,233 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:51:24,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:51:24,240 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:51:24,242 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:51:24,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:51:24,247 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:51:24,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:51:24,252 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:51:24,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:51:24,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:51:24,262 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:51:24,264 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:51:24,265 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:51:24,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:51:24,282 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:51:24,283 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:51:24,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:51:24,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:51:24,287 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:51:24,288 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:51:24,289 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:51:24,291 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:51:24,292 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:51:24,294 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:51:24,298 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:51:24,299 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:51:24,299 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:51:24,300 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:51:24,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:51:24,301 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:51:24,302 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:51:24,340 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:51:24,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:51:24,344 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:51:24,344 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:51:24,345 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:51:24,345 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:51:24,346 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:51:24,346 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:51:24,346 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:51:24,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:51:24,348 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:51:24,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:51:24,348 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:51:24,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:51:24,349 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:51:24,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:51:24,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:51:24,350 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:51:24,350 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:51:24,350 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:51:24,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:51:24,351 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:51:24,351 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:51:24,351 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:51:24,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:51:24,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:51:24,352 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:51:24,352 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:51:24,353 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:51:24,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:51:24,353 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:51:24,353 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:51:24,354 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:51:24,354 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_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be3b53cc5f9badbf5402cafcfa5766831674eb009261bc7c1bcbe9580aece38e [2022-11-20 11:51:24,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:51:24,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:51:24,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:51:24,724 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:51:24,724 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:51:24,726 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/loop-invgen/fragtest_simple.i [2022-11-20 11:51:27,742 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:51:27,957 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:51:27,957 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/sv-benchmarks/c/loop-invgen/fragtest_simple.i [2022-11-20 11:51:27,964 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/data/b9a67d5b8/f398a174ab814c1b9ae7d5b3112772cf/FLAG8e82b9e29 [2022-11-20 11:51:27,979 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/data/b9a67d5b8/f398a174ab814c1b9ae7d5b3112772cf [2022-11-20 11:51:27,982 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:51:27,984 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:51:27,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:51:27,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:51:27,990 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:51:27,991 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:51:27" (1/1) ... [2022-11-20 11:51:27,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@240cd9dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:51:27, skipping insertion in model container [2022-11-20 11:51:27,992 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:51:27" (1/1) ... [2022-11-20 11:51:28,001 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:51:28,017 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:51:28,212 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_5e50a318-a2d1-4b06-80fa-b88574b0eb10/sv-benchmarks/c/loop-invgen/fragtest_simple.i[893,906] [2022-11-20 11:51:28,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:51:28,246 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:51:28,262 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_5e50a318-a2d1-4b06-80fa-b88574b0eb10/sv-benchmarks/c/loop-invgen/fragtest_simple.i[893,906] [2022-11-20 11:51:28,273 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:51:28,292 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:51:28,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:51:28 WrapperNode [2022-11-20 11:51:28,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:51:28,296 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:51:28,296 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:51:28,296 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:51:28,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:51:28" (1/1) ... [2022-11-20 11:51:28,313 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:51:28" (1/1) ... [2022-11-20 11:51:28,336 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-11-20 11:51:28,336 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:51:28,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:51:28,337 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:51:28,337 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:51:28,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:51:28" (1/1) ... [2022-11-20 11:51:28,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:51:28" (1/1) ... [2022-11-20 11:51:28,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:51:28" (1/1) ... [2022-11-20 11:51:28,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:51:28" (1/1) ... [2022-11-20 11:51:28,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:51:28" (1/1) ... [2022-11-20 11:51:28,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:51:28" (1/1) ... [2022-11-20 11:51:28,381 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:51:28" (1/1) ... [2022-11-20 11:51:28,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:51:28" (1/1) ... [2022-11-20 11:51:28,384 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:51:28,390 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:51:28,390 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:51:28,391 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:51:28,392 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:51:28" (1/1) ... [2022-11-20 11:51:28,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:51:28,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:51:28,431 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:51:28,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:51:28,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:51:28,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:51:28,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:51:28,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:51:28,573 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:51:28,575 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:51:28,823 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:51:28,829 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:51:28,830 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 11:51:28,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:51:28 BoogieIcfgContainer [2022-11-20 11:51:28,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:51:28,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:51:28,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:51:28,846 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:51:28,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:51:27" (1/3) ... [2022-11-20 11:51:28,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@92c5f87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:51:28, skipping insertion in model container [2022-11-20 11:51:28,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:51:28" (2/3) ... [2022-11-20 11:51:28,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@92c5f87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:51:28, skipping insertion in model container [2022-11-20 11:51:28,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:51:28" (3/3) ... [2022-11-20 11:51:28,850 INFO L112 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i [2022-11-20 11:51:28,875 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:51:28,875 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:51:28,928 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:51:28,935 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;@4ed6054e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:51:28,935 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 11:51:28,940 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:51:28,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:51:28,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:51:28,947 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:51:28,947 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:51:28,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:51:28,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1265170590, now seen corresponding path program 1 times [2022-11-20 11:51:28,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:51:28,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787525910] [2022-11-20 11:51:28,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:51:28,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:51:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:51:29,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:29,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:51:29,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787525910] [2022-11-20 11:51:29,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787525910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:51:29,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:51:29,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:51:29,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125418859] [2022-11-20 11:51:29,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:51:29,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:51:29,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:51:29,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:51:29,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:51:29,242 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 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 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:51:29,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:51:29,271 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2022-11-20 11:51:29,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:51:29,274 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-11-20 11:51:29,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:51:29,285 INFO L225 Difference]: With dead ends: 34 [2022-11-20 11:51:29,285 INFO L226 Difference]: Without dead ends: 15 [2022-11-20 11:51:29,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:51:29,294 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:51:29,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:51:29,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-20 11:51:29,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-20 11:51:29,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:51:29,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-11-20 11:51:29,332 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2022-11-20 11:51:29,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:51:29,333 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-11-20 11:51:29,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:51:29,333 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-11-20 11:51:29,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:51:29,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:51:29,334 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:51:29,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:51:29,336 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:51:29,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:51:29,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1704738984, now seen corresponding path program 1 times [2022-11-20 11:51:29,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:51:29,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647973991] [2022-11-20 11:51:29,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:51:29,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:51:29,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:51:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:29,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:51:29,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647973991] [2022-11-20 11:51:29,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647973991] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:51:29,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:51:29,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:51:29,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525751930] [2022-11-20 11:51:29,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:51:29,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:51:29,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:51:29,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:51:29,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:51:29,602 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 11:51:29,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:51:29,646 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-11-20 11:51:29,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:51:29,647 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2022-11-20 11:51:29,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:51:29,647 INFO L225 Difference]: With dead ends: 20 [2022-11-20 11:51:29,648 INFO L226 Difference]: Without dead ends: 18 [2022-11-20 11:51:29,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:51:29,649 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:51:29,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 32 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:51:29,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-20 11:51:29,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-11-20 11:51:29,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:51:29,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-20 11:51:29,655 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2022-11-20 11:51:29,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:51:29,656 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-20 11:51:29,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 11:51:29,656 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-20 11:51:29,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:51:29,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:51:29,657 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:51:29,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:51:29,657 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:51:29,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:51:29,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1111328011, now seen corresponding path program 1 times [2022-11-20 11:51:29,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:51:29,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145920937] [2022-11-20 11:51:29,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:51:29,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:51:29,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:51:29,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:29,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:51:29,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145920937] [2022-11-20 11:51:29,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145920937] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:51:29,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:51:29,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:51:29,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919454384] [2022-11-20 11:51:29,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:51:29,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:51:29,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:51:29,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:51:29,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:51:29,812 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:51:29,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:51:29,884 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-11-20 11:51:29,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:51:29,885 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2022-11-20 11:51:29,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:51:29,886 INFO L225 Difference]: With dead ends: 34 [2022-11-20 11:51:29,886 INFO L226 Difference]: Without dead ends: 23 [2022-11-20 11:51:29,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:51:29,888 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:51:29,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:51:29,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-20 11:51:29,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2022-11-20 11:51:29,893 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) [2022-11-20 11:51:29,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-11-20 11:51:29,894 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2022-11-20 11:51:29,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:51:29,894 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-11-20 11:51:29,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:51:29,895 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-11-20 11:51:29,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 11:51:29,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:51:29,896 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:51:29,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:51:29,896 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:51:29,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:51:29,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1396960176, now seen corresponding path program 1 times [2022-11-20 11:51:29,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:51:29,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705906680] [2022-11-20 11:51:29,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:51:29,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:51:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:51:30,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:30,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:51:30,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705906680] [2022-11-20 11:51:30,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705906680] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:51:30,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493882252] [2022-11-20 11:51:30,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:51:30,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:30,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:51:30,074 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:51:30,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:51:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:51:30,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:51:30,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:51:30,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:30,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:51:30,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:30,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493882252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:51:30,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:51:30,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-20 11:51:30,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834316665] [2022-11-20 11:51:30,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:51:30,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:51:30,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:51:30,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:51:30,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:51:30,445 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2022-11-20 11:51:30,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:51:30,628 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2022-11-20 11:51:30,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:51:30,629 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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 18 [2022-11-20 11:51:30,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:51:30,630 INFO L225 Difference]: With dead ends: 45 [2022-11-20 11:51:30,630 INFO L226 Difference]: Without dead ends: 34 [2022-11-20 11:51:30,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:51:30,632 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 61 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:51:30,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 52 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:51:30,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-20 11:51:30,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2022-11-20 11:51:30,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 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) [2022-11-20 11:51:30,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-11-20 11:51:30,640 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2022-11-20 11:51:30,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:51:30,641 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-11-20 11:51:30,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2022-11-20 11:51:30,642 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-11-20 11:51:30,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 11:51:30,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:51:30,643 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:51:30,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:51:30,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:30,850 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:51:30,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:51:30,851 INFO L85 PathProgramCache]: Analyzing trace with hash -2071602104, now seen corresponding path program 2 times [2022-11-20 11:51:30,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:51:30,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146277556] [2022-11-20 11:51:30,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:51:30,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:51:30,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:51:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:31,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:51:31,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146277556] [2022-11-20 11:51:31,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146277556] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:51:31,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695334620] [2022-11-20 11:51:31,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:51:31,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:31,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:51:31,045 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:51:31,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:51:31,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:51:31,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:51:31,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:51:31,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:51:31,212 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:31,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:51:31,275 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:31,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695334620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:51:31,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:51:31,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-11-20 11:51:31,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375665852] [2022-11-20 11:51:31,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:51:31,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:51:31,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:51:31,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:51:31,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:51:31,278 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2022-11-20 11:51:31,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:51:31,388 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2022-11-20 11:51:31,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:51:31,389 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 24 [2022-11-20 11:51:31,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:51:31,391 INFO L225 Difference]: With dead ends: 54 [2022-11-20 11:51:31,391 INFO L226 Difference]: Without dead ends: 39 [2022-11-20 11:51:31,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:51:31,395 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:51:31,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 80 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:51:31,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-20 11:51:31,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2022-11-20 11:51:31,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:51:31,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-11-20 11:51:31,406 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 24 [2022-11-20 11:51:31,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:51:31,406 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-11-20 11:51:31,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2022-11-20 11:51:31,407 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-11-20 11:51:31,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 11:51:31,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:51:31,408 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:51:31,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:51:31,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:31,613 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:51:31,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:51:31,614 INFO L85 PathProgramCache]: Analyzing trace with hash 65129965, now seen corresponding path program 3 times [2022-11-20 11:51:31,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:51:31,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967217918] [2022-11-20 11:51:31,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:51:31,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:51:31,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:51:31,748 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:31,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:51:31,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967217918] [2022-11-20 11:51:31,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967217918] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:51:31,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010606907] [2022-11-20 11:51:31,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:51:31,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:31,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:51:31,750 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:51:31,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:51:31,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 11:51:31,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:51:31,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:51:31,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:51:31,889 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:31,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:51:31,989 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:31,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010606907] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:51:31,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:51:31,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-11-20 11:51:31,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213698274] [2022-11-20 11:51:31,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:51:31,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:51:31,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:51:31,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:51:31,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:51:31,996 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 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) [2022-11-20 11:51:32,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:51:32,135 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-11-20 11:51:32,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:51:32,137 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 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 26 [2022-11-20 11:51:32,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:51:32,139 INFO L225 Difference]: With dead ends: 44 [2022-11-20 11:51:32,139 INFO L226 Difference]: Without dead ends: 42 [2022-11-20 11:51:32,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:51:32,140 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:51:32,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 87 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:51:32,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-20 11:51:32,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2022-11-20 11:51:32,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:51:32,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-11-20 11:51:32,153 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 26 [2022-11-20 11:51:32,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:51:32,153 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-11-20 11:51:32,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 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) [2022-11-20 11:51:32,154 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-11-20 11:51:32,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 11:51:32,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:51:32,156 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:51:32,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:51:32,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:32,361 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:51:32,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:51:32,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1290527443, now seen corresponding path program 4 times [2022-11-20 11:51:32,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:51:32,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122950833] [2022-11-20 11:51:32,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:51:32,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:51:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:51:32,523 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 23 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:32,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:51:32,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122950833] [2022-11-20 11:51:32,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122950833] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:51:32,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871460570] [2022-11-20 11:51:32,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:51:32,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:32,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:51:32,525 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:51:32,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:51:32,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:51:32,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:51:32,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 11:51:32,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:51:32,765 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:32,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:51:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:32,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871460570] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:51:32,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:51:32,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-11-20 11:51:32,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647289318] [2022-11-20 11:51:32,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:51:32,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 11:51:32,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:51:32,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 11:51:32,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:51:32,889 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 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) [2022-11-20 11:51:33,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:51:33,162 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2022-11-20 11:51:33,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:51:33,162 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 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 34 [2022-11-20 11:51:33,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:51:33,167 INFO L225 Difference]: With dead ends: 97 [2022-11-20 11:51:33,167 INFO L226 Difference]: Without dead ends: 59 [2022-11-20 11:51:33,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=214, Invalid=598, Unknown=0, NotChecked=0, Total=812 [2022-11-20 11:51:33,170 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 64 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:51:33,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 117 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:51:33,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-20 11:51:33,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 39. [2022-11-20 11:51:33,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:51:33,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-11-20 11:51:33,177 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 34 [2022-11-20 11:51:33,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:51:33,178 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-11-20 11:51:33,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 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) [2022-11-20 11:51:33,178 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-11-20 11:51:33,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 11:51:33,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:51:33,179 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:51:33,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:51:33,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:33,380 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:51:33,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:51:33,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1017343069, now seen corresponding path program 5 times [2022-11-20 11:51:33,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:51:33,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586885254] [2022-11-20 11:51:33,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:51:33,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:51:33,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:51:33,586 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:33,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:51:33,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586885254] [2022-11-20 11:51:33,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586885254] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:51:33,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352073031] [2022-11-20 11:51:33,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:51:33,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:33,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:51:33,588 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:51:33,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:51:33,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-20 11:51:33,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:51:33,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:51:33,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:51:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 30 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:33,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:51:33,881 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 30 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:33,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352073031] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:51:33,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:51:33,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-11-20 11:51:33,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16417154] [2022-11-20 11:51:33,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:51:33,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:51:33,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:51:33,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:51:33,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:51:33,885 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 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) [2022-11-20 11:51:34,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:51:34,049 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2022-11-20 11:51:34,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:51:34,055 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 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 38 [2022-11-20 11:51:34,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:51:34,057 INFO L225 Difference]: With dead ends: 56 [2022-11-20 11:51:34,057 INFO L226 Difference]: Without dead ends: 54 [2022-11-20 11:51:34,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 69 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:51:34,059 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:51:34,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 103 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:51:34,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-20 11:51:34,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2022-11-20 11:51:34,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 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) [2022-11-20 11:51:34,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-11-20 11:51:34,081 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 38 [2022-11-20 11:51:34,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:51:34,082 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-11-20 11:51:34,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 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) [2022-11-20 11:51:34,082 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-11-20 11:51:34,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 11:51:34,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:51:34,084 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:51:34,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:51:34,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:34,289 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:51:34,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:51:34,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1327501635, now seen corresponding path program 6 times [2022-11-20 11:51:34,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:51:34,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421490163] [2022-11-20 11:51:34,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:51:34,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:51:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:51:34,523 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 57 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:34,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:51:34,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421490163] [2022-11-20 11:51:34,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421490163] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:51:34,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220266888] [2022-11-20 11:51:34,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:51:34,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:34,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:51:34,525 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:51:34,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:51:34,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-20 11:51:34,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:51:34,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:51:34,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:51:34,865 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 72 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:34,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:51:35,037 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 72 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:35,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220266888] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:51:35,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:51:35,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 26 [2022-11-20 11:51:35,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673130966] [2022-11-20 11:51:35,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:51:35,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 11:51:35,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:51:35,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 11:51:35,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2022-11-20 11:51:35,039 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 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) [2022-11-20 11:51:35,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:51:35,427 INFO L93 Difference]: Finished difference Result 133 states and 152 transitions. [2022-11-20 11:51:35,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 11:51:35,428 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 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 46 [2022-11-20 11:51:35,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:51:35,428 INFO L225 Difference]: With dead ends: 133 [2022-11-20 11:51:35,428 INFO L226 Difference]: Without dead ends: 79 [2022-11-20 11:51:35,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 72 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 11:51:35,430 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 98 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:51:35,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 158 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:51:35,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-20 11:51:35,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 51. [2022-11-20 11:51:35,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.08) internal successors, (54), 50 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) [2022-11-20 11:51:35,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2022-11-20 11:51:35,447 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 46 [2022-11-20 11:51:35,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:51:35,447 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2022-11-20 11:51:35,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 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) [2022-11-20 11:51:35,447 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2022-11-20 11:51:35,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-20 11:51:35,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:51:35,448 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:51:35,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:51:35,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:35,649 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:51:35,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:51:35,650 INFO L85 PathProgramCache]: Analyzing trace with hash 359898061, now seen corresponding path program 7 times [2022-11-20 11:51:35,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:51:35,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520784453] [2022-11-20 11:51:35,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:51:35,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:51:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:51:35,899 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 42 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:35,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:51:35,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520784453] [2022-11-20 11:51:35,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520784453] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:51:35,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750228407] [2022-11-20 11:51:35,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:51:35,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:35,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:51:35,902 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:51:35,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:51:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:51:35,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:51:35,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:51:36,093 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 56 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:36,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:51:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 56 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:36,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750228407] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:51:36,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:51:36,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 14 [2022-11-20 11:51:36,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285419669] [2022-11-20 11:51:36,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:51:36,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:51:36,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:51:36,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:51:36,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:51:36,239 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 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) [2022-11-20 11:51:36,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:51:36,401 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2022-11-20 11:51:36,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 11:51:36,402 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 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 50 [2022-11-20 11:51:36,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:51:36,403 INFO L225 Difference]: With dead ends: 68 [2022-11-20 11:51:36,403 INFO L226 Difference]: Without dead ends: 66 [2022-11-20 11:51:36,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 91 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:51:36,404 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 85 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:51:36,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 103 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:51:36,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-20 11:51:36,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2022-11-20 11:51:36,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 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) [2022-11-20 11:51:36,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2022-11-20 11:51:36,413 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 50 [2022-11-20 11:51:36,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:51:36,414 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2022-11-20 11:51:36,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 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) [2022-11-20 11:51:36,414 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2022-11-20 11:51:36,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-20 11:51:36,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:51:36,415 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:51:36,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:51:36,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 11:51:36,622 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:51:36,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:51:36,622 INFO L85 PathProgramCache]: Analyzing trace with hash -968765261, now seen corresponding path program 8 times [2022-11-20 11:51:36,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:51:36,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464406361] [2022-11-20 11:51:36,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:51:36,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:51:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:51:36,964 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 107 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:36,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:51:36,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464406361] [2022-11-20 11:51:36,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464406361] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:51:36,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545942751] [2022-11-20 11:51:36,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:51:36,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:36,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:51:36,966 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:51:36,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:51:37,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:51:37,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:51:37,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:51:37,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:51:37,370 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 126 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:51:37,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:51:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 126 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:51:37,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545942751] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:51:37,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:51:37,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 29 [2022-11-20 11:51:37,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597604759] [2022-11-20 11:51:37,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:51:37,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 11:51:37,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:51:37,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 11:51:37,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2022-11-20 11:51:37,568 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 29 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) [2022-11-20 11:51:37,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:51:37,802 INFO L93 Difference]: Finished difference Result 130 states and 150 transitions. [2022-11-20 11:51:37,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:51:37,802 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 29 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 58 [2022-11-20 11:51:37,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:51:37,804 INFO L225 Difference]: With dead ends: 130 [2022-11-20 11:51:37,804 INFO L226 Difference]: Without dead ends: 93 [2022-11-20 11:51:37,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 92 SyntacticMatches, 14 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=339, Invalid=993, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 11:51:37,806 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 90 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:51:37,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 128 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:51:37,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-20 11:51:37,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2022-11-20 11:51:37,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:51:37,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2022-11-20 11:51:37,824 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 58 [2022-11-20 11:51:37,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:51:37,824 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2022-11-20 11:51:37,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 29 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) [2022-11-20 11:51:37,825 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2022-11-20 11:51:37,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 11:51:37,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:51:37,830 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:51:37,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:51:38,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:38,036 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:51:38,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:51:38,036 INFO L85 PathProgramCache]: Analyzing trace with hash 85268760, now seen corresponding path program 9 times [2022-11-20 11:51:38,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:51:38,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014932671] [2022-11-20 11:51:38,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:51:38,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:51:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:51:38,390 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 107 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:38,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:51:38,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014932671] [2022-11-20 11:51:38,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014932671] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:51:38,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357749943] [2022-11-20 11:51:38,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:51:38,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:38,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:51:38,392 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:51:38,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:51:38,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-20 11:51:38,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:51:38,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:51:38,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:51:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 128 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:38,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:51:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 128 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:39,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357749943] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:51:39,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:51:39,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 31 [2022-11-20 11:51:39,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37014972] [2022-11-20 11:51:39,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:51:39,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 11:51:39,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:51:39,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 11:51:39,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-11-20 11:51:39,124 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 31 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) [2022-11-20 11:51:39,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:51:39,448 INFO L93 Difference]: Finished difference Result 138 states and 160 transitions. [2022-11-20 11:51:39,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 11:51:39,449 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 31 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 60 [2022-11-20 11:51:39,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:51:39,449 INFO L225 Difference]: With dead ends: 138 [2022-11-20 11:51:39,449 INFO L226 Difference]: Without dead ends: 99 [2022-11-20 11:51:39,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 93 SyntacticMatches, 16 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=405, Invalid=1155, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 11:51:39,452 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 122 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:51:39,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 184 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:51:39,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-20 11:51:39,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 63. [2022-11-20 11:51:39,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:51:39,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-11-20 11:51:39,465 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 60 [2022-11-20 11:51:39,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:51:39,465 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-11-20 11:51:39,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 31 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) [2022-11-20 11:51:39,466 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-11-20 11:51:39,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-20 11:51:39,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:51:39,466 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:51:39,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:51:39,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 11:51:39,672 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:51:39,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:51:39,673 INFO L85 PathProgramCache]: Analyzing trace with hash -600318915, now seen corresponding path program 10 times [2022-11-20 11:51:39,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:51:39,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313334833] [2022-11-20 11:51:39,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:51:39,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:51:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:51:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 72 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:39,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:51:39,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313334833] [2022-11-20 11:51:39,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313334833] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:51:39,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595863556] [2022-11-20 11:51:39,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:51:39,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:39,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:51:39,994 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:51:40,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:51:40,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:51:40,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:51:40,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:51:40,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:51:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 90 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:40,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:51:40,466 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 90 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:40,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595863556] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:51:40,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:51:40,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 16 [2022-11-20 11:51:40,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16689035] [2022-11-20 11:51:40,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:51:40,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:51:40,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:51:40,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:51:40,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:51:40,469 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 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) [2022-11-20 11:51:40,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:51:40,694 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2022-11-20 11:51:40,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 11:51:40,694 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 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 62 [2022-11-20 11:51:40,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:51:40,695 INFO L225 Difference]: With dead ends: 80 [2022-11-20 11:51:40,695 INFO L226 Difference]: Without dead ends: 78 [2022-11-20 11:51:40,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 113 SyntacticMatches, 16 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2022-11-20 11:51:40,696 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 131 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:51:40,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 107 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:51:40,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-20 11:51:40,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2022-11-20 11:51:40,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 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) [2022-11-20 11:51:40,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2022-11-20 11:51:40,706 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 62 [2022-11-20 11:51:40,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:51:40,706 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2022-11-20 11:51:40,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 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) [2022-11-20 11:51:40,707 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2022-11-20 11:51:40,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-20 11:51:40,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:51:40,708 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:51:40,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:51:40,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:40,913 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:51:40,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:51:40,914 INFO L85 PathProgramCache]: Analyzing trace with hash -2101960413, now seen corresponding path program 11 times [2022-11-20 11:51:40,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:51:40,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124636175] [2022-11-20 11:51:40,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:51:40,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:51:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:51:41,392 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 173 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:41,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:51:41,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124636175] [2022-11-20 11:51:41,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124636175] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:51:41,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023201786] [2022-11-20 11:51:41,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:51:41,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:41,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:51:41,395 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:51:41,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:51:41,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-11-20 11:51:41,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:51:41,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 11:51:41,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:51:42,050 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 200 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:42,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:51:42,420 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 200 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:42,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023201786] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:51:42,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:51:42,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 38 [2022-11-20 11:51:42,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091715923] [2022-11-20 11:51:42,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:51:42,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-20 11:51:42,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:51:42,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-20 11:51:42,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1066, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 11:51:42,423 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 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) [2022-11-20 11:51:43,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:51:43,061 INFO L93 Difference]: Finished difference Result 205 states and 232 transitions. [2022-11-20 11:51:43,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 11:51:43,061 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 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 70 [2022-11-20 11:51:43,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:51:43,062 INFO L225 Difference]: With dead ends: 205 [2022-11-20 11:51:43,062 INFO L226 Difference]: Without dead ends: 119 [2022-11-20 11:51:43,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 108 SyntacticMatches, 17 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=856, Invalid=2566, Unknown=0, NotChecked=0, Total=3422 [2022-11-20 11:51:43,064 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 164 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:51:43,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 238 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:51:43,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-20 11:51:43,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 75. [2022-11-20 11:51:43,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:51:43,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-11-20 11:51:43,083 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 70 [2022-11-20 11:51:43,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:51:43,083 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-11-20 11:51:43,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 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) [2022-11-20 11:51:43,084 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-11-20 11:51:43,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-20 11:51:43,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:51:43,085 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:51:43,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 11:51:43,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:43,292 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:51:43,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:51:43,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1953124947, now seen corresponding path program 12 times [2022-11-20 11:51:43,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:51:43,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400748723] [2022-11-20 11:51:43,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:51:43,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:51:43,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:51:43,744 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 110 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:43,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:51:43,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400748723] [2022-11-20 11:51:43,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400748723] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:51:43,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312782901] [2022-11-20 11:51:43,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:51:43,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:43,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:51:43,746 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:51:43,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 11:51:43,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-11-20 11:51:43,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:51:43,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 11:51:43,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:51:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 132 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:44,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:51:44,249 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 132 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:44,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312782901] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:51:44,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:51:44,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 18 [2022-11-20 11:51:44,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79791982] [2022-11-20 11:51:44,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:51:44,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:51:44,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:51:44,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:51:44,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:51:44,252 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 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) [2022-11-20 11:51:44,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:51:44,519 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2022-11-20 11:51:44,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 11:51:44,520 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 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 74 [2022-11-20 11:51:44,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:51:44,521 INFO L225 Difference]: With dead ends: 92 [2022-11-20 11:51:44,521 INFO L226 Difference]: Without dead ends: 90 [2022-11-20 11:51:44,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 135 SyntacticMatches, 20 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2022-11-20 11:51:44,522 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 157 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:51:44,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 119 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:51:44,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-20 11:51:44,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2022-11-20 11:51:44,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 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) [2022-11-20 11:51:44,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2022-11-20 11:51:44,533 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 74 [2022-11-20 11:51:44,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:51:44,533 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2022-11-20 11:51:44,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 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) [2022-11-20 11:51:44,533 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2022-11-20 11:51:44,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-20 11:51:44,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:51:44,541 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:51:44,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 11:51:44,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 11:51:44,746 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:51:44,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:51:44,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1101267603, now seen corresponding path program 13 times [2022-11-20 11:51:44,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:51:44,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307904855] [2022-11-20 11:51:44,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:51:44,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:51:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:51:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 255 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:45,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:51:45,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307904855] [2022-11-20 11:51:45,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307904855] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:51:45,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564646357] [2022-11-20 11:51:45,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:51:45,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:45,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:51:45,435 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:51:45,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 11:51:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:51:45,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 11:51:45,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:51:46,097 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 286 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:51:46,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:51:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 286 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:51:46,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564646357] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:51:46,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:51:46,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 41 [2022-11-20 11:51:46,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740797057] [2022-11-20 11:51:46,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:51:46,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-20 11:51:46,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:51:46,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-20 11:51:46,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1259, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 11:51:46,470 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 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) [2022-11-20 11:51:46,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:51:46,897 INFO L93 Difference]: Finished difference Result 186 states and 214 transitions. [2022-11-20 11:51:46,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 11:51:46,897 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 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 82 [2022-11-20 11:51:46,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:51:46,900 INFO L225 Difference]: With dead ends: 186 [2022-11-20 11:51:46,900 INFO L226 Difference]: Without dead ends: 133 [2022-11-20 11:51:46,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 128 SyntacticMatches, 22 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=695, Invalid=2061, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 11:51:46,903 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 166 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:51:46,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 231 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:51:46,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-20 11:51:46,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 85. [2022-11-20 11:51:46,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 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) [2022-11-20 11:51:46,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2022-11-20 11:51:46,914 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 82 [2022-11-20 11:51:46,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:51:46,914 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2022-11-20 11:51:46,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 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) [2022-11-20 11:51:46,915 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2022-11-20 11:51:46,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-20 11:51:46,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:51:46,916 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:51:46,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 11:51:47,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 11:51:47,121 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:51:47,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:51:47,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1272075272, now seen corresponding path program 14 times [2022-11-20 11:51:47,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:51:47,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223459834] [2022-11-20 11:51:47,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:51:47,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:51:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:51:47,751 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 255 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:47,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:51:47,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223459834] [2022-11-20 11:51:47,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223459834] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:51:47,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568723071] [2022-11-20 11:51:47,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:51:47,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:47,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:51:47,754 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:51:47,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 11:51:47,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:51:47,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:51:47,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 11:51:47,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:51:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 288 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:48,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:51:48,848 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 288 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:48,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568723071] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:51:48,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:51:48,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 43 [2022-11-20 11:51:48,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193637065] [2022-11-20 11:51:48,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:51:48,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 11:51:48,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:51:48,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 11:51:48,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=1383, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 11:51:48,851 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 43 states, 43 states have (on average 3.255813953488372) internal successors, (140), 43 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) [2022-11-20 11:51:49,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:51:49,340 INFO L93 Difference]: Finished difference Result 194 states and 224 transitions. [2022-11-20 11:51:49,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 11:51:49,340 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.255813953488372) internal successors, (140), 43 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 84 [2022-11-20 11:51:49,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:51:49,341 INFO L225 Difference]: With dead ends: 194 [2022-11-20 11:51:49,342 INFO L226 Difference]: Without dead ends: 139 [2022-11-20 11:51:49,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 129 SyntacticMatches, 24 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=789, Invalid=2291, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 11:51:49,345 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 185 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:51:49,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 280 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:51:49,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-20 11:51:49,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 87. [2022-11-20 11:51:49,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:51:49,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2022-11-20 11:51:49,355 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 84 [2022-11-20 11:51:49,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:51:49,356 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2022-11-20 11:51:49,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.255813953488372) internal successors, (140), 43 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) [2022-11-20 11:51:49,356 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2022-11-20 11:51:49,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-20 11:51:49,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:51:49,357 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:51:49,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 11:51:49,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 11:51:49,562 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:51:49,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:51:49,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1426943971, now seen corresponding path program 15 times [2022-11-20 11:51:49,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:51:49,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142370930] [2022-11-20 11:51:49,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:51:49,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:51:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:51:50,051 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 156 proven. 314 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:50,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:51:50,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142370930] [2022-11-20 11:51:50,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142370930] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:51:50,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351633531] [2022-11-20 11:51:50,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:51:50,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:50,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:51:50,053 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:51:50,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 11:51:50,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-11-20 11:51:50,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:51:50,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:51:50,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:51:50,309 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 182 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:50,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:51:50,619 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 182 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:50,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351633531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:51:50,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:51:50,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 20 [2022-11-20 11:51:50,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194845433] [2022-11-20 11:51:50,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:51:50,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 11:51:50,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:51:50,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 11:51:50,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:51:50,621 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 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) [2022-11-20 11:51:50,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:51:50,899 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2022-11-20 11:51:50,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 11:51:50,900 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 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 86 [2022-11-20 11:51:50,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:51:50,901 INFO L225 Difference]: With dead ends: 104 [2022-11-20 11:51:50,901 INFO L226 Difference]: Without dead ends: 102 [2022-11-20 11:51:50,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 157 SyntacticMatches, 24 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=449, Invalid=811, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 11:51:50,902 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 131 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:51:50,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 166 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:51:50,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-20 11:51:50,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2022-11-20 11:51:50,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 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) [2022-11-20 11:51:50,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2022-11-20 11:51:50,915 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 86 [2022-11-20 11:51:50,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:51:50,915 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2022-11-20 11:51:50,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 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) [2022-11-20 11:51:50,916 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2022-11-20 11:51:50,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-20 11:51:50,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:51:50,917 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:51:50,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 11:51:51,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 11:51:51,123 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:51:51,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:51:51,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1930463997, now seen corresponding path program 16 times [2022-11-20 11:51:51,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:51:51,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351389354] [2022-11-20 11:51:51,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:51:51,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:51:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:51:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 353 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:51,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:51:51,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351389354] [2022-11-20 11:51:51,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351389354] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:51:51,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908523948] [2022-11-20 11:51:51,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:51:51,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:51,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:51:51,895 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:51:51,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 11:51:51,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:51:51,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:51:51,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 11:51:51,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:51:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 392 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:52,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:51:53,314 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 392 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:53,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908523948] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:51:53,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:51:53,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 50 [2022-11-20 11:51:53,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283035450] [2022-11-20 11:51:53,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:51:53,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-20 11:51:53,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:51:53,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-20 11:51:53,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2022-11-20 11:51:53,317 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand has 50 states, 50 states have (on average 3.34) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:51:54,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:51:54,325 INFO L93 Difference]: Finished difference Result 277 states and 312 transitions. [2022-11-20 11:51:54,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-20 11:51:54,326 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.34) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 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 94 [2022-11-20 11:51:54,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:51:54,327 INFO L225 Difference]: With dead ends: 277 [2022-11-20 11:51:54,327 INFO L226 Difference]: Without dead ends: 159 [2022-11-20 11:51:54,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 144 SyntacticMatches, 25 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1989 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1524, Invalid=4638, Unknown=0, NotChecked=0, Total=6162 [2022-11-20 11:51:54,330 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 216 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:51:54,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 430 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:51:54,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-11-20 11:51:54,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 99. [2022-11-20 11:51:54,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 98 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:51:54,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2022-11-20 11:51:54,344 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 94 [2022-11-20 11:51:54,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:51:54,345 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2022-11-20 11:51:54,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.34) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:51:54,345 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2022-11-20 11:51:54,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-20 11:51:54,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:51:54,347 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:51:54,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 11:51:54,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:54,553 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:51:54,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:51:54,554 INFO L85 PathProgramCache]: Analyzing trace with hash 779355021, now seen corresponding path program 17 times [2022-11-20 11:51:54,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:51:54,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877146368] [2022-11-20 11:51:54,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:51:54,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:51:54,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:51:55,175 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 210 proven. 422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:55,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:51:55,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877146368] [2022-11-20 11:51:55,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877146368] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:51:55,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975141957] [2022-11-20 11:51:55,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:51:55,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:55,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:51:55,177 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:51:55,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 11:51:55,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-11-20 11:51:55,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:51:55,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 11:51:55,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:51:55,491 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 240 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:55,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:51:55,858 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 240 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:55,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975141957] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:51:55,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:51:55,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 22 [2022-11-20 11:51:55,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57268627] [2022-11-20 11:51:55,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:51:55,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 11:51:55,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:51:55,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 11:51:55,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:51:55,860 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand has 22 states, 22 states have (on average 5.5) internal successors, (121), 22 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:51:56,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:51:56,186 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2022-11-20 11:51:56,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-20 11:51:56,187 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.5) internal successors, (121), 22 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 98 [2022-11-20 11:51:56,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:51:56,188 INFO L225 Difference]: With dead ends: 116 [2022-11-20 11:51:56,188 INFO L226 Difference]: Without dead ends: 114 [2022-11-20 11:51:56,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 179 SyntacticMatches, 28 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=558, Invalid=1002, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 11:51:56,190 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 161 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:51:56,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 146 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:51:56,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-20 11:51:56,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2022-11-20 11:51:56,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 106 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:51:56,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2022-11-20 11:51:56,208 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 98 [2022-11-20 11:51:56,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:51:56,208 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2022-11-20 11:51:56,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.5) internal successors, (121), 22 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:51:56,208 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2022-11-20 11:51:56,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-20 11:51:56,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:51:56,210 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:51:56,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 11:51:56,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:56,416 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:51:56,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:51:56,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1690404749, now seen corresponding path program 18 times [2022-11-20 11:51:56,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:51:56,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255399300] [2022-11-20 11:51:56,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:51:56,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:51:56,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:51:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 467 proven. 285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:57,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:51:57,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255399300] [2022-11-20 11:51:57,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255399300] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:51:57,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548880766] [2022-11-20 11:51:57,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:51:57,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:57,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:51:57,411 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:51:57,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 11:51:57,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-11-20 11:51:57,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:51:57,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 11:51:57,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:51:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 512 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:58,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:51:59,106 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 512 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:59,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548880766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:51:59,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:51:59,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 56 [2022-11-20 11:51:59,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401675171] [2022-11-20 11:51:59,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:51:59,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-20 11:51:59,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:51:59,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-20 11:51:59,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=724, Invalid=2356, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 11:51:59,109 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand has 56 states, 56 states have (on average 3.3392857142857144) internal successors, (187), 56 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:00,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:00,234 INFO L93 Difference]: Finished difference Result 313 states and 352 transitions. [2022-11-20 11:52:00,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-20 11:52:00,234 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.3392857142857144) internal successors, (187), 56 states have internal predecessors, (187), 0 states have call successors, (0), 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 106 [2022-11-20 11:52:00,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:00,236 INFO L225 Difference]: With dead ends: 313 [2022-11-20 11:52:00,236 INFO L226 Difference]: Without dead ends: 179 [2022-11-20 11:52:00,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 162 SyntacticMatches, 29 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2548 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1930, Invalid=5902, Unknown=0, NotChecked=0, Total=7832 [2022-11-20 11:52:00,239 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 267 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:00,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 463 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:52:00,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-11-20 11:52:00,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 111. [2022-11-20 11:52:00,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0363636363636364) internal successors, (114), 110 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:00,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2022-11-20 11:52:00,256 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 106 [2022-11-20 11:52:00,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:00,256 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2022-11-20 11:52:00,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.3392857142857144) internal successors, (187), 56 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:00,257 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2022-11-20 11:52:00,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-20 11:52:00,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:00,258 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:52:00,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 11:52:00,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:52:00,464 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:00,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:00,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1459587069, now seen corresponding path program 19 times [2022-11-20 11:52:00,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:00,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296494375] [2022-11-20 11:52:00,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:00,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:01,248 INFO L134 CoverageAnalysis]: Checked inductivity of 818 backedges. 272 proven. 546 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:01,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:01,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296494375] [2022-11-20 11:52:01,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296494375] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:52:01,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288979332] [2022-11-20 11:52:01,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:52:01,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:52:01,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:52:01,251 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:52:01,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 11:52:01,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:01,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-20 11:52:01,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:52:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 818 backedges. 306 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:01,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:52:02,099 INFO L134 CoverageAnalysis]: Checked inductivity of 818 backedges. 306 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:02,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288979332] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:52:02,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:52:02,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 24 [2022-11-20 11:52:02,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702142084] [2022-11-20 11:52:02,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:52:02,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 11:52:02,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:02,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 11:52:02,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=333, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:52:02,101 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 24 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) [2022-11-20 11:52:02,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:02,495 INFO L93 Difference]: Finished difference Result 128 states and 132 transitions. [2022-11-20 11:52:02,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-20 11:52:02,496 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 24 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 110 [2022-11-20 11:52:02,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:02,497 INFO L225 Difference]: With dead ends: 128 [2022-11-20 11:52:02,497 INFO L226 Difference]: Without dead ends: 126 [2022-11-20 11:52:02,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 201 SyntacticMatches, 32 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=679, Invalid=1213, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 11:52:02,499 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 177 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:02,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 166 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:52:02,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-20 11:52:02,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 119. [2022-11-20 11:52:02,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0338983050847457) internal successors, (122), 118 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) [2022-11-20 11:52:02,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2022-11-20 11:52:02,517 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 110 [2022-11-20 11:52:02,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:02,517 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2022-11-20 11:52:02,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 24 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) [2022-11-20 11:52:02,518 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2022-11-20 11:52:02,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-20 11:52:02,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:02,519 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:52:02,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 11:52:02,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:52:02,726 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:02,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:02,727 INFO L85 PathProgramCache]: Analyzing trace with hash 804687075, now seen corresponding path program 20 times [2022-11-20 11:52:02,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:02,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447110195] [2022-11-20 11:52:02,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:02,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:02,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 597 proven. 357 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:03,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:04,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447110195] [2022-11-20 11:52:04,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447110195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:52:04,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777256024] [2022-11-20 11:52:04,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:52:04,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:52:04,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:52:04,001 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:52:04,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 11:52:04,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:52:04,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:52:04,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 11:52:04,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:52:05,084 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 646 proven. 306 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:52:05,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:52:05,734 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 646 proven. 306 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:52:05,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777256024] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:52:05,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:52:05,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 59 [2022-11-20 11:52:05,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669161307] [2022-11-20 11:52:05,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:52:05,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-20 11:52:05,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:05,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-20 11:52:05,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=2639, Unknown=0, NotChecked=0, Total=3422 [2022-11-20 11:52:05,737 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand has 59 states, 59 states have (on average 3.3559322033898304) internal successors, (198), 59 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:06,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:06,484 INFO L93 Difference]: Finished difference Result 270 states and 310 transitions. [2022-11-20 11:52:06,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-20 11:52:06,485 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.3559322033898304) internal successors, (198), 59 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2022-11-20 11:52:06,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:06,486 INFO L225 Difference]: With dead ends: 270 [2022-11-20 11:52:06,486 INFO L226 Difference]: Without dead ends: 193 [2022-11-20 11:52:06,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 182 SyntacticMatches, 34 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2171 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1469, Invalid=4383, Unknown=0, NotChecked=0, Total=5852 [2022-11-20 11:52:06,489 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 227 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:06,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 398 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:52:06,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-20 11:52:06,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 121. [2022-11-20 11:52:06,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0333333333333334) internal successors, (124), 120 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) [2022-11-20 11:52:06,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2022-11-20 11:52:06,507 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 118 [2022-11-20 11:52:06,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:06,508 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2022-11-20 11:52:06,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.3559322033898304) internal successors, (198), 59 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:06,508 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2022-11-20 11:52:06,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-20 11:52:06,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:06,510 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:52:06,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-20 11:52:06,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:52:06,716 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:06,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:06,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1574315976, now seen corresponding path program 21 times [2022-11-20 11:52:06,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:06,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160981903] [2022-11-20 11:52:06,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:06,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:07,899 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 597 proven. 393 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:07,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:07,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160981903] [2022-11-20 11:52:07,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160981903] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:52:07,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984082187] [2022-11-20 11:52:07,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:52:07,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:52:07,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:52:07,901 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:52:07,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 11:52:08,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-11-20 11:52:08,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:52:08,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-20 11:52:08,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:52:09,038 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 648 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:09,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:52:09,816 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 648 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:09,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984082187] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:52:09,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:52:09,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 61 [2022-11-20 11:52:09,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906102676] [2022-11-20 11:52:09,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:52:09,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-20 11:52:09,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:09,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-20 11:52:09,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=843, Invalid=2817, Unknown=0, NotChecked=0, Total=3660 [2022-11-20 11:52:09,820 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand has 61 states, 61 states have (on average 3.278688524590164) internal successors, (200), 61 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:10,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:10,685 INFO L93 Difference]: Finished difference Result 278 states and 320 transitions. [2022-11-20 11:52:10,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 11:52:10,685 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.278688524590164) internal successors, (200), 61 states have internal predecessors, (200), 0 states have call successors, (0), 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 120 [2022-11-20 11:52:10,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:10,687 INFO L225 Difference]: With dead ends: 278 [2022-11-20 11:52:10,687 INFO L226 Difference]: Without dead ends: 199 [2022-11-20 11:52:10,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 183 SyntacticMatches, 36 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2332 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1605, Invalid=4715, Unknown=0, NotChecked=0, Total=6320 [2022-11-20 11:52:10,689 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 259 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:10,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 380 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:52:10,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-11-20 11:52:10,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 123. [2022-11-20 11:52:10,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 122 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) [2022-11-20 11:52:10,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2022-11-20 11:52:10,709 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 120 [2022-11-20 11:52:10,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:10,710 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2022-11-20 11:52:10,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.278688524590164) internal successors, (200), 61 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:10,710 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2022-11-20 11:52:10,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-20 11:52:10,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:10,712 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:52:10,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 11:52:10,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 11:52:10,919 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:10,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:10,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1841652371, now seen corresponding path program 22 times [2022-11-20 11:52:10,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:10,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972903171] [2022-11-20 11:52:10,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:10,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:10,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:11,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 342 proven. 686 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:11,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:11,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972903171] [2022-11-20 11:52:11,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972903171] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:52:11,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107290540] [2022-11-20 11:52:11,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:52:11,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:52:11,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:52:11,828 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:52:11,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 11:52:11,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:52:11,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:52:11,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-20 11:52:11,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:52:12,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 380 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:12,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:52:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 380 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:12,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107290540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:52:12,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:52:12,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 26 [2022-11-20 11:52:12,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083831756] [2022-11-20 11:52:12,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:52:12,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 11:52:12,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:12,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 11:52:12,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=388, Unknown=0, NotChecked=0, Total=650 [2022-11-20 11:52:12,825 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand has 26 states, 26 states have (on average 5.576923076923077) internal successors, (145), 26 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) [2022-11-20 11:52:13,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:13,307 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2022-11-20 11:52:13,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-20 11:52:13,308 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.576923076923077) internal successors, (145), 26 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 122 [2022-11-20 11:52:13,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:13,309 INFO L225 Difference]: With dead ends: 140 [2022-11-20 11:52:13,309 INFO L226 Difference]: Without dead ends: 138 [2022-11-20 11:52:13,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 223 SyntacticMatches, 36 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=812, Invalid=1444, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 11:52:13,318 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 195 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:13,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 186 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:52:13,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-20 11:52:13,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 131. [2022-11-20 11:52:13,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0307692307692307) internal successors, (134), 130 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) [2022-11-20 11:52:13,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 134 transitions. [2022-11-20 11:52:13,335 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 134 transitions. Word has length 122 [2022-11-20 11:52:13,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:13,335 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 134 transitions. [2022-11-20 11:52:13,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.576923076923077) internal successors, (145), 26 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) [2022-11-20 11:52:13,336 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 134 transitions. [2022-11-20 11:52:13,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-20 11:52:13,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:13,337 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:52:13,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 11:52:13,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-20 11:52:13,543 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:13,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:13,543 INFO L85 PathProgramCache]: Analyzing trace with hash 2067608147, now seen corresponding path program 23 times [2022-11-20 11:52:13,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:13,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166818640] [2022-11-20 11:52:13,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:13,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:15,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 743 proven. 437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:15,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:15,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166818640] [2022-11-20 11:52:15,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166818640] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:52:15,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568399822] [2022-11-20 11:52:15,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:52:15,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:52:15,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:52:15,008 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:52:15,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 11:52:15,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2022-11-20 11:52:15,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:52:15,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-20 11:52:15,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:52:16,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 800 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:16,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:52:17,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 800 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:17,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568399822] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:52:17,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:52:17,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 68 [2022-11-20 11:52:17,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022335641] [2022-11-20 11:52:17,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:52:17,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-20 11:52:17,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:17,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-20 11:52:17,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1060, Invalid=3496, Unknown=0, NotChecked=0, Total=4556 [2022-11-20 11:52:17,420 INFO L87 Difference]: Start difference. First operand 131 states and 134 transitions. Second operand has 68 states, 68 states have (on average 3.338235294117647) internal successors, (227), 68 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:18,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:18,945 INFO L93 Difference]: Finished difference Result 385 states and 432 transitions. [2022-11-20 11:52:18,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-20 11:52:18,946 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.338235294117647) internal successors, (227), 68 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2022-11-20 11:52:18,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:18,948 INFO L225 Difference]: With dead ends: 385 [2022-11-20 11:52:18,948 INFO L226 Difference]: Without dead ends: 219 [2022-11-20 11:52:18,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 198 SyntacticMatches, 37 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3870 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2886, Invalid=8886, Unknown=0, NotChecked=0, Total=11772 [2022-11-20 11:52:18,950 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 410 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:18,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 601 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:52:18,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-11-20 11:52:18,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 135. [2022-11-20 11:52:18,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0298507462686568) internal successors, (138), 134 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) [2022-11-20 11:52:18,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2022-11-20 11:52:18,967 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 130 [2022-11-20 11:52:18,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:18,967 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2022-11-20 11:52:18,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.338235294117647) internal successors, (227), 68 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:18,968 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2022-11-20 11:52:18,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-20 11:52:18,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:18,969 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:52:18,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 11:52:19,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-20 11:52:19,177 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:19,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:19,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1519043549, now seen corresponding path program 24 times [2022-11-20 11:52:19,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:19,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180886713] [2022-11-20 11:52:19,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:19,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:19,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1262 backedges. 420 proven. 842 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:20,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:20,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180886713] [2022-11-20 11:52:20,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180886713] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:52:20,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795580899] [2022-11-20 11:52:20,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:52:20,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:52:20,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:52:20,306 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:52:20,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 11:52:20,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-11-20 11:52:20,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:52:20,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-20 11:52:20,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:52:20,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1262 backedges. 462 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:20,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:52:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1262 backedges. 462 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:21,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795580899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:52:21,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:52:21,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 28 [2022-11-20 11:52:21,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197621215] [2022-11-20 11:52:21,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:52:21,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 11:52:21,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:21,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 11:52:21,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2022-11-20 11:52:21,426 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 28 states, 28 states have (on average 5.607142857142857) internal successors, (157), 28 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:21,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:21,949 INFO L93 Difference]: Finished difference Result 152 states and 156 transitions. [2022-11-20 11:52:21,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-20 11:52:21,950 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.607142857142857) internal successors, (157), 28 states have internal predecessors, (157), 0 states have call successors, (0), 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 134 [2022-11-20 11:52:21,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:21,951 INFO L225 Difference]: With dead ends: 152 [2022-11-20 11:52:21,951 INFO L226 Difference]: Without dead ends: 150 [2022-11-20 11:52:21,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 245 SyntacticMatches, 40 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=957, Invalid=1695, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 11:52:21,953 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 215 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:21,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 211 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:52:21,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-20 11:52:21,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 143. [2022-11-20 11:52:21,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.028169014084507) internal successors, (146), 142 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:21,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 146 transitions. [2022-11-20 11:52:21,976 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 146 transitions. Word has length 134 [2022-11-20 11:52:21,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:21,976 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 146 transitions. [2022-11-20 11:52:21,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.607142857142857) internal successors, (157), 28 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:21,977 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 146 transitions. [2022-11-20 11:52:21,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-20 11:52:21,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:21,978 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:52:21,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-20 11:52:22,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-20 11:52:22,185 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:22,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:22,186 INFO L85 PathProgramCache]: Analyzing trace with hash -101193533, now seen corresponding path program 25 times [2022-11-20 11:52:22,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:22,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842909985] [2022-11-20 11:52:22,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:22,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:22,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:23,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 905 proven. 525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:23,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:23,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842909985] [2022-11-20 11:52:23,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842909985] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:52:23,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947845466] [2022-11-20 11:52:23,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:52:23,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:52:23,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:52:23,671 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:52:23,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-20 11:52:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:23,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-20 11:52:23,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:52:25,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 966 proven. 462 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:52:25,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:52:26,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 966 proven. 462 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:52:26,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947845466] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:52:26,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:52:26,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 71 [2022-11-20 11:52:26,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180270680] [2022-11-20 11:52:26,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:52:26,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-20 11:52:26,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:26,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-20 11:52:26,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1131, Invalid=3839, Unknown=0, NotChecked=0, Total=4970 [2022-11-20 11:52:26,098 INFO L87 Difference]: Start difference. First operand 143 states and 146 transitions. Second operand has 71 states, 71 states have (on average 3.352112676056338) internal successors, (238), 71 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:27,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:27,143 INFO L93 Difference]: Finished difference Result 326 states and 374 transitions. [2022-11-20 11:52:27,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-20 11:52:27,144 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.352112676056338) internal successors, (238), 71 states have internal predecessors, (238), 0 states have call successors, (0), 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 142 [2022-11-20 11:52:27,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:27,145 INFO L225 Difference]: With dead ends: 326 [2022-11-20 11:52:27,145 INFO L226 Difference]: Without dead ends: 233 [2022-11-20 11:52:27,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 218 SyntacticMatches, 42 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3187 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2145, Invalid=6411, Unknown=0, NotChecked=0, Total=8556 [2022-11-20 11:52:27,148 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 333 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:27,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 459 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:52:27,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-20 11:52:27,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 145. [2022-11-20 11:52:27,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0277777777777777) internal successors, (148), 144 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:27,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 148 transitions. [2022-11-20 11:52:27,172 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 148 transitions. Word has length 142 [2022-11-20 11:52:27,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:27,173 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 148 transitions. [2022-11-20 11:52:27,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.352112676056338) internal successors, (238), 71 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:27,173 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 148 transitions. [2022-11-20 11:52:27,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-20 11:52:27,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:27,174 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:52:27,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-20 11:52:27,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:52:27,381 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:27,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:27,381 INFO L85 PathProgramCache]: Analyzing trace with hash -2007079768, now seen corresponding path program 26 times [2022-11-20 11:52:27,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:27,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718511143] [2022-11-20 11:52:27,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:27,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:27,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:29,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 905 proven. 569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:29,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:29,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718511143] [2022-11-20 11:52:29,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718511143] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:52:29,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378048092] [2022-11-20 11:52:29,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:52:29,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:52:29,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:52:29,073 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:52:29,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-20 11:52:29,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:52:29,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:52:29,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-20 11:52:29,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:52:30,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 968 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:30,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:52:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 968 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:31,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378048092] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:52:31,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:52:31,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 73 [2022-11-20 11:52:31,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97788523] [2022-11-20 11:52:31,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:52:31,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-20 11:52:31,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:31,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-20 11:52:31,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1203, Invalid=4053, Unknown=0, NotChecked=0, Total=5256 [2022-11-20 11:52:31,689 INFO L87 Difference]: Start difference. First operand 145 states and 148 transitions. Second operand has 73 states, 73 states have (on average 3.287671232876712) internal successors, (240), 73 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:32,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:32,751 INFO L93 Difference]: Finished difference Result 334 states and 384 transitions. [2022-11-20 11:52:32,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-20 11:52:32,751 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.287671232876712) internal successors, (240), 73 states have internal predecessors, (240), 0 states have call successors, (0), 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 144 [2022-11-20 11:52:32,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:32,753 INFO L225 Difference]: With dead ends: 334 [2022-11-20 11:52:32,753 INFO L226 Difference]: Without dead ends: 239 [2022-11-20 11:52:32,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 219 SyntacticMatches, 44 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3380 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2309, Invalid=6811, Unknown=0, NotChecked=0, Total=9120 [2022-11-20 11:52:32,756 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 268 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:32,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 480 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:52:32,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-20 11:52:32,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 147. [2022-11-20 11:52:32,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 146 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:32,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2022-11-20 11:52:32,782 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 144 [2022-11-20 11:52:32,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:32,782 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2022-11-20 11:52:32,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.287671232876712) internal successors, (240), 73 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:32,783 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2022-11-20 11:52:32,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-20 11:52:32,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:32,784 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:52:32,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-20 11:52:32,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 11:52:32,985 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:32,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:32,985 INFO L85 PathProgramCache]: Analyzing trace with hash 387283789, now seen corresponding path program 27 times [2022-11-20 11:52:32,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:32,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230550207] [2022-11-20 11:52:32,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:32,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:34,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 506 proven. 1014 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:34,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:34,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230550207] [2022-11-20 11:52:34,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230550207] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:52:34,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087079761] [2022-11-20 11:52:34,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:52:34,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:52:34,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:52:34,143 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:52:34,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-20 11:52:34,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-11-20 11:52:34,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:52:34,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-20 11:52:34,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:52:34,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 552 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:34,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:52:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 552 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:35,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087079761] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:52:35,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:52:35,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 30 [2022-11-20 11:52:35,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436585984] [2022-11-20 11:52:35,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:52:35,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 11:52:35,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:35,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 11:52:35,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=510, Unknown=0, NotChecked=0, Total=870 [2022-11-20 11:52:35,334 INFO L87 Difference]: Start difference. First operand 147 states and 150 transitions. Second operand has 30 states, 30 states have (on average 5.633333333333334) internal successors, (169), 30 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:35,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:35,873 INFO L93 Difference]: Finished difference Result 164 states and 168 transitions. [2022-11-20 11:52:35,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-20 11:52:35,874 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.633333333333334) internal successors, (169), 30 states have internal predecessors, (169), 0 states have call successors, (0), 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 146 [2022-11-20 11:52:35,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:35,875 INFO L225 Difference]: With dead ends: 164 [2022-11-20 11:52:35,875 INFO L226 Difference]: Without dead ends: 162 [2022-11-20 11:52:35,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 267 SyntacticMatches, 44 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1114, Invalid=1966, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 11:52:35,876 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 287 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:35,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 213 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:52:35,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-20 11:52:35,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 155. [2022-11-20 11:52:35,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.025974025974026) internal successors, (158), 154 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:35,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 158 transitions. [2022-11-20 11:52:35,900 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 158 transitions. Word has length 146 [2022-11-20 11:52:35,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:35,901 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 158 transitions. [2022-11-20 11:52:35,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.633333333333334) internal successors, (169), 30 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:35,901 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 158 transitions. [2022-11-20 11:52:35,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-20 11:52:35,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:35,902 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:52:35,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-20 11:52:36,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:52:36,104 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:36,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:36,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1439445043, now seen corresponding path program 28 times [2022-11-20 11:52:36,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:36,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754024966] [2022-11-20 11:52:36,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:36,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:36,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 1083 proven. 621 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:37,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:37,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754024966] [2022-11-20 11:52:37,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754024966] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:52:37,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640177306] [2022-11-20 11:52:37,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:52:37,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:52:37,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:52:37,869 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:52:37,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-20 11:52:38,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:52:38,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:52:38,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-20 11:52:38,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:52:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 1152 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:39,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:52:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 1152 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:41,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640177306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:52:41,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:52:41,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 80 [2022-11-20 11:52:41,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049288040] [2022-11-20 11:52:41,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:52:41,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-20 11:52:41,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:41,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-20 11:52:41,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1460, Invalid=4860, Unknown=0, NotChecked=0, Total=6320 [2022-11-20 11:52:41,065 INFO L87 Difference]: Start difference. First operand 155 states and 158 transitions. Second operand has 80 states, 80 states have (on average 3.3375) internal successors, (267), 80 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:43,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:43,066 INFO L93 Difference]: Finished difference Result 457 states and 512 transitions. [2022-11-20 11:52:43,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-20 11:52:43,066 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.3375) internal successors, (267), 80 states have internal predecessors, (267), 0 states have call successors, (0), 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 154 [2022-11-20 11:52:43,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:43,069 INFO L225 Difference]: With dead ends: 457 [2022-11-20 11:52:43,069 INFO L226 Difference]: Without dead ends: 259 [2022-11-20 11:52:43,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 234 SyntacticMatches, 45 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5464 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4034, Invalid=12478, Unknown=0, NotChecked=0, Total=16512 [2022-11-20 11:52:43,071 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 391 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:43,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 766 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 11:52:43,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-20 11:52:43,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 159. [2022-11-20 11:52:43,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0253164556962024) internal successors, (162), 158 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:43,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 162 transitions. [2022-11-20 11:52:43,099 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 162 transitions. Word has length 154 [2022-11-20 11:52:43,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:43,100 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 162 transitions. [2022-11-20 11:52:43,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.3375) internal successors, (267), 80 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:43,101 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 162 transitions. [2022-11-20 11:52:43,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-20 11:52:43,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:43,102 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:52:43,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-20 11:52:43,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:52:43,309 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:43,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:43,309 INFO L85 PathProgramCache]: Analyzing trace with hash -71285827, now seen corresponding path program 29 times [2022-11-20 11:52:43,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:43,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592763869] [2022-11-20 11:52:43,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:43,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:43,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:44,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1802 backedges. 600 proven. 1202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:44,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:44,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592763869] [2022-11-20 11:52:44,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592763869] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:52:44,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984948362] [2022-11-20 11:52:44,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:52:44,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:52:44,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:52:44,478 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:52:44,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-20 11:52:44,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2022-11-20 11:52:44,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:52:44,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-20 11:52:44,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:52:44,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1802 backedges. 650 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:44,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:52:45,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1802 backedges. 650 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:45,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984948362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:52:45,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:52:45,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 32 [2022-11-20 11:52:45,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120380225] [2022-11-20 11:52:45,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:52:45,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 11:52:45,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:45,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 11:52:45,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=577, Unknown=0, NotChecked=0, Total=992 [2022-11-20 11:52:45,867 INFO L87 Difference]: Start difference. First operand 159 states and 162 transitions. Second operand has 32 states, 32 states have (on average 5.65625) internal successors, (181), 32 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:46,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:46,454 INFO L93 Difference]: Finished difference Result 176 states and 180 transitions. [2022-11-20 11:52:46,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-20 11:52:46,454 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.65625) internal successors, (181), 32 states have internal predecessors, (181), 0 states have call successors, (0), 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 158 [2022-11-20 11:52:46,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:46,456 INFO L225 Difference]: With dead ends: 176 [2022-11-20 11:52:46,456 INFO L226 Difference]: Without dead ends: 174 [2022-11-20 11:52:46,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 289 SyntacticMatches, 48 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1283, Invalid=2257, Unknown=0, NotChecked=0, Total=3540 [2022-11-20 11:52:46,457 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 225 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:46,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 316 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:52:46,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-20 11:52:46,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 167. [2022-11-20 11:52:46,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.0240963855421688) internal successors, (170), 166 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:46,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 170 transitions. [2022-11-20 11:52:46,493 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 170 transitions. Word has length 158 [2022-11-20 11:52:46,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:46,493 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 170 transitions. [2022-11-20 11:52:46,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.65625) internal successors, (181), 32 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:46,494 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 170 transitions. [2022-11-20 11:52:46,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-20 11:52:46,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:46,495 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:52:46,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-20 11:52:46,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:52:46,702 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:46,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:46,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1159694499, now seen corresponding path program 30 times [2022-11-20 11:52:46,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:46,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600881587] [2022-11-20 11:52:46,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:46,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:46,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:48,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 1277 proven. 725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:48,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:48,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600881587] [2022-11-20 11:52:48,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600881587] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:52:48,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269084122] [2022-11-20 11:52:48,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:52:48,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:52:48,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:52:48,647 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:52:48,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-20 11:52:48,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-11-20 11:52:48,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:52:48,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-20 11:52:48,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:52:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 1352 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:50,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:52:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 1352 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:52,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269084122] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:52:52,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:52:52,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 86 [2022-11-20 11:52:52,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408902061] [2022-11-20 11:52:52,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:52:52,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-11-20 11:52:52,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:52,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-11-20 11:52:52,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1684, Invalid=5626, Unknown=0, NotChecked=0, Total=7310 [2022-11-20 11:52:52,124 INFO L87 Difference]: Start difference. First operand 167 states and 170 transitions. Second operand has 86 states, 86 states have (on average 3.3372093023255816) internal successors, (287), 86 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:54,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:54,366 INFO L93 Difference]: Finished difference Result 493 states and 552 transitions. [2022-11-20 11:52:54,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-11-20 11:52:54,366 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.3372093023255816) internal successors, (287), 86 states have internal predecessors, (287), 0 states have call successors, (0), 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 166 [2022-11-20 11:52:54,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:54,368 INFO L225 Difference]: With dead ends: 493 [2022-11-20 11:52:54,368 INFO L226 Difference]: Without dead ends: 279 [2022-11-20 11:52:54,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 252 SyntacticMatches, 49 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6363 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4680, Invalid=14502, Unknown=0, NotChecked=0, Total=19182 [2022-11-20 11:52:54,371 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 407 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:54,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 838 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 11:52:54,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-11-20 11:52:54,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 171. [2022-11-20 11:52:54,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.0235294117647058) internal successors, (174), 170 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:54,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 174 transitions. [2022-11-20 11:52:54,402 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 174 transitions. Word has length 166 [2022-11-20 11:52:54,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:54,402 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 174 transitions. [2022-11-20 11:52:54,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.3372093023255816) internal successors, (287), 86 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:54,403 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 174 transitions. [2022-11-20 11:52:54,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-11-20 11:52:54,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:54,404 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:52:54,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-20 11:52:54,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-20 11:52:54,611 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:54,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:54,612 INFO L85 PathProgramCache]: Analyzing trace with hash -382690003, now seen corresponding path program 31 times [2022-11-20 11:52:54,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:54,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488689684] [2022-11-20 11:52:54,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:54,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:54,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:55,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 702 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:55,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:55,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488689684] [2022-11-20 11:52:55,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488689684] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:52:55,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081984976] [2022-11-20 11:52:55,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:52:55,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:52:55,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:52:55,852 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:52:55,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-20 11:52:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:55,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-20 11:52:55,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:52:56,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 756 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:56,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:52:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 756 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:57,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081984976] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:52:57,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:52:57,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 34 [2022-11-20 11:52:57,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24991105] [2022-11-20 11:52:57,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:52:57,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:52:57,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:57,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:52:57,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=648, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:52:57,220 INFO L87 Difference]: Start difference. First operand 171 states and 174 transitions. Second operand has 34 states, 34 states have (on average 5.676470588235294) internal successors, (193), 34 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:57,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:57,935 INFO L93 Difference]: Finished difference Result 188 states and 192 transitions. [2022-11-20 11:52:57,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-20 11:52:57,935 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.676470588235294) internal successors, (193), 34 states have internal predecessors, (193), 0 states have call successors, (0), 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 170 [2022-11-20 11:52:57,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:57,937 INFO L225 Difference]: With dead ends: 188 [2022-11-20 11:52:57,937 INFO L226 Difference]: Without dead ends: 186 [2022-11-20 11:52:57,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 311 SyntacticMatches, 52 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1852 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1464, Invalid=2568, Unknown=0, NotChecked=0, Total=4032 [2022-11-20 11:52:57,939 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 185 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:57,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 266 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:52:57,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-11-20 11:52:57,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 179. [2022-11-20 11:52:57,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.0224719101123596) internal successors, (182), 178 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:57,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 182 transitions. [2022-11-20 11:52:57,960 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 182 transitions. Word has length 170 [2022-11-20 11:52:57,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:57,960 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 182 transitions. [2022-11-20 11:52:57,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.676470588235294) internal successors, (193), 34 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:57,960 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 182 transitions. [2022-11-20 11:52:57,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-11-20 11:52:57,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:57,961 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:52:57,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-20 11:52:58,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-20 11:52:58,162 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:58,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:58,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1796698643, now seen corresponding path program 32 times [2022-11-20 11:52:58,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:58,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026887341] [2022-11-20 11:52:58,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:58,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:58,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:00,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 1487 proven. 837 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:00,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:00,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026887341] [2022-11-20 11:53:00,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026887341] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:53:00,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611781012] [2022-11-20 11:53:00,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:53:00,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:53:00,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:53:00,329 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:53:00,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-20 11:53:00,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:53:00,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:53:00,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-20 11:53:00,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:53:02,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 1566 proven. 756 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:53:02,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:53:03,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 1566 proven. 756 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:53:03,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611781012] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:53:03,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:53:03,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 89 [2022-11-20 11:53:03,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044695405] [2022-11-20 11:53:03,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:53:03,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-11-20 11:53:03,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:03,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-11-20 11:53:03,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1773, Invalid=6059, Unknown=0, NotChecked=0, Total=7832 [2022-11-20 11:53:03,826 INFO L87 Difference]: Start difference. First operand 179 states and 182 transitions. Second operand has 89 states, 89 states have (on average 3.348314606741573) internal successors, (298), 89 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:53:05,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:05,455 INFO L93 Difference]: Finished difference Result 410 states and 470 transitions. [2022-11-20 11:53:05,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-20 11:53:05,455 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.348314606741573) internal successors, (298), 89 states have internal predecessors, (298), 0 states have call successors, (0), 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 178 [2022-11-20 11:53:05,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:05,456 INFO L225 Difference]: With dead ends: 410 [2022-11-20 11:53:05,456 INFO L226 Difference]: Without dead ends: 293 [2022-11-20 11:53:05,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 272 SyntacticMatches, 54 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5071 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3399, Invalid=10173, Unknown=0, NotChecked=0, Total=13572 [2022-11-20 11:53:05,459 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 378 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:53:05,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 663 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:53:05,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-11-20 11:53:05,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 181. [2022-11-20 11:53:05,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.0222222222222221) internal successors, (184), 180 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:53:05,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 184 transitions. [2022-11-20 11:53:05,489 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 184 transitions. Word has length 178 [2022-11-20 11:53:05,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:53:05,489 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 184 transitions. [2022-11-20 11:53:05,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.348314606741573) internal successors, (298), 89 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:53:05,490 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 184 transitions. [2022-11-20 11:53:05,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-11-20 11:53:05,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:05,491 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:53:05,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-20 11:53:05,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:53:05,695 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:05,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:05,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1983684472, now seen corresponding path program 33 times [2022-11-20 11:53:05,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:05,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424390837] [2022-11-20 11:53:05,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:05,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:08,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1487 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:08,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:08,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424390837] [2022-11-20 11:53:08,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424390837] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:53:08,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850966859] [2022-11-20 11:53:08,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:53:08,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:53:08,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:53:08,212 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:53:08,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-20 11:53:08,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2022-11-20 11:53:08,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:53:08,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-20 11:53:08,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:53:10,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1568 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:10,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:53:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1568 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:12,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850966859] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:53:12,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:53:12,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 91 [2022-11-20 11:53:12,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134957964] [2022-11-20 11:53:12,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:53:12,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-11-20 11:53:12,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:12,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-11-20 11:53:12,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1863, Invalid=6327, Unknown=0, NotChecked=0, Total=8190 [2022-11-20 11:53:12,169 INFO L87 Difference]: Start difference. First operand 181 states and 184 transitions. Second operand has 91 states, 91 states have (on average 3.2967032967032965) internal successors, (300), 91 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:53:13,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:13,745 INFO L93 Difference]: Finished difference Result 418 states and 480 transitions. [2022-11-20 11:53:13,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-20 11:53:13,745 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.2967032967032965) internal successors, (300), 91 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2022-11-20 11:53:13,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:13,747 INFO L225 Difference]: With dead ends: 418 [2022-11-20 11:53:13,747 INFO L226 Difference]: Without dead ends: 299 [2022-11-20 11:53:13,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 273 SyntacticMatches, 56 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5312 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3605, Invalid=10675, Unknown=0, NotChecked=0, Total=14280 [2022-11-20 11:53:13,750 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 480 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:53:13,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 624 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:53:13,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-20 11:53:13,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 183. [2022-11-20 11:53:13,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.021978021978022) internal successors, (186), 182 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:53:13,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 186 transitions. [2022-11-20 11:53:13,787 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 186 transitions. Word has length 180 [2022-11-20 11:53:13,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:53:13,788 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 186 transitions. [2022-11-20 11:53:13,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.2967032967032965) internal successors, (300), 91 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:53:13,788 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 186 transitions. [2022-11-20 11:53:13,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-20 11:53:13,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:13,790 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:53:13,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-20 11:53:13,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-20 11:53:13,997 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:13,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:13,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1288439709, now seen corresponding path program 34 times [2022-11-20 11:53:13,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:13,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517112942] [2022-11-20 11:53:13,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:13,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:14,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:15,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2438 backedges. 812 proven. 1626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:15,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:15,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517112942] [2022-11-20 11:53:15,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517112942] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:53:15,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892109771] [2022-11-20 11:53:15,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:53:15,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:53:15,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:53:15,271 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:53:15,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-20 11:53:15,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:53:15,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:53:15,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 11:53:15,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:53:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2438 backedges. 870 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:15,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:53:16,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2438 backedges. 870 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:16,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892109771] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:53:16,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:53:16,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 36 [2022-11-20 11:53:16,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633132192] [2022-11-20 11:53:16,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:53:16,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 11:53:16,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:16,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 11:53:16,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=723, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 11:53:16,827 INFO L87 Difference]: Start difference. First operand 183 states and 186 transitions. Second operand has 36 states, 36 states have (on average 5.694444444444445) internal successors, (205), 36 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:53:17,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:17,608 INFO L93 Difference]: Finished difference Result 200 states and 204 transitions. [2022-11-20 11:53:17,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-20 11:53:17,608 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.694444444444445) internal successors, (205), 36 states have internal predecessors, (205), 0 states have call successors, (0), 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 182 [2022-11-20 11:53:17,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:17,610 INFO L225 Difference]: With dead ends: 200 [2022-11-20 11:53:17,610 INFO L226 Difference]: Without dead ends: 198 [2022-11-20 11:53:17,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 333 SyntacticMatches, 56 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2106 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1657, Invalid=2899, Unknown=0, NotChecked=0, Total=4556 [2022-11-20 11:53:17,612 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 199 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:53:17,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 287 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:53:17,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-20 11:53:17,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 191. [2022-11-20 11:53:17,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.0210526315789474) internal successors, (194), 190 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:53:17,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 194 transitions. [2022-11-20 11:53:17,649 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 194 transitions. Word has length 182 [2022-11-20 11:53:17,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:53:17,650 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 194 transitions. [2022-11-20 11:53:17,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.694444444444445) internal successors, (205), 36 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:53:17,651 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 194 transitions. [2022-11-20 11:53:17,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-20 11:53:17,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:17,652 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:53:17,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-20 11:53:17,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:53:17,860 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:17,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:17,861 INFO L85 PathProgramCache]: Analyzing trace with hash 932801667, now seen corresponding path program 35 times [2022-11-20 11:53:17,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:17,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687311816] [2022-11-20 11:53:17,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:17,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:17,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:20,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 1713 proven. 957 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:20,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:20,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687311816] [2022-11-20 11:53:20,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687311816] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:53:20,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925225159] [2022-11-20 11:53:20,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:53:20,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:53:20,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:53:20,146 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:53:20,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-20 11:53:20,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2022-11-20 11:53:20,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:53:20,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-20 11:53:20,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:53:22,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 1800 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:22,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:53:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 1800 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:24,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925225159] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:53:24,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:53:24,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 98 [2022-11-20 11:53:24,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926814733] [2022-11-20 11:53:24,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:53:24,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-11-20 11:53:24,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:24,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-11-20 11:53:24,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2180, Invalid=7326, Unknown=0, NotChecked=0, Total=9506 [2022-11-20 11:53:24,439 INFO L87 Difference]: Start difference. First operand 191 states and 194 transitions. Second operand has 98 states, 98 states have (on average 3.336734693877551) internal successors, (327), 98 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:53:27,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:27,326 INFO L93 Difference]: Finished difference Result 565 states and 632 transitions. [2022-11-20 11:53:27,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-20 11:53:27,327 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.336734693877551) internal successors, (327), 98 states have internal predecessors, (327), 0 states have call successors, (0), 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 190 [2022-11-20 11:53:27,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:27,328 INFO L225 Difference]: With dead ends: 565 [2022-11-20 11:53:27,328 INFO L226 Difference]: Without dead ends: 319 [2022-11-20 11:53:27,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 288 SyntacticMatches, 57 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8365 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=6116, Invalid=19006, Unknown=0, NotChecked=0, Total=25122 [2022-11-20 11:53:27,331 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 531 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:53:27,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 902 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 11:53:27,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-11-20 11:53:27,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 195. [2022-11-20 11:53:27,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0206185567010309) internal successors, (198), 194 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:53:27,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 198 transitions. [2022-11-20 11:53:27,367 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 198 transitions. Word has length 190 [2022-11-20 11:53:27,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:53:27,368 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 198 transitions. [2022-11-20 11:53:27,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.336734693877551) internal successors, (327), 98 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:53:27,368 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 198 transitions. [2022-11-20 11:53:27,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-20 11:53:27,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:27,370 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:53:27,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-20 11:53:27,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-20 11:53:27,578 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:27,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:27,579 INFO L85 PathProgramCache]: Analyzing trace with hash 12059405, now seen corresponding path program 36 times [2022-11-20 11:53:27,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:27,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560223318] [2022-11-20 11:53:27,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:27,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:29,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 930 proven. 1862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:29,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:29,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560223318] [2022-11-20 11:53:29,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560223318] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:53:29,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738336442] [2022-11-20 11:53:29,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:53:29,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:53:29,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:53:29,309 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:53:29,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-20 11:53:29,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2022-11-20 11:53:29,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:53:29,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-20 11:53:29,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:53:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 992 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:29,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:53:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 992 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:31,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738336442] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:53:31,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:53:31,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 38 [2022-11-20 11:53:31,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762703431] [2022-11-20 11:53:31,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:53:31,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-20 11:53:31,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:31,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-20 11:53:31,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=604, Invalid=802, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 11:53:31,285 INFO L87 Difference]: Start difference. First operand 195 states and 198 transitions. Second operand has 38 states, 38 states have (on average 5.7105263157894735) internal successors, (217), 38 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:53:32,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:32,111 INFO L93 Difference]: Finished difference Result 212 states and 216 transitions. [2022-11-20 11:53:32,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-20 11:53:32,111 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.7105263157894735) internal successors, (217), 38 states have internal predecessors, (217), 0 states have call successors, (0), 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 194 [2022-11-20 11:53:32,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:32,112 INFO L225 Difference]: With dead ends: 212 [2022-11-20 11:53:32,112 INFO L226 Difference]: Without dead ends: 210 [2022-11-20 11:53:32,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 355 SyntacticMatches, 60 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2376 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1862, Invalid=3250, Unknown=0, NotChecked=0, Total=5112 [2022-11-20 11:53:32,113 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 367 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:53:32,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 299 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:53:32,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-11-20 11:53:32,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 203. [2022-11-20 11:53:32,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.0198019801980198) internal successors, (206), 202 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:53:32,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 206 transitions. [2022-11-20 11:53:32,155 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 206 transitions. Word has length 194 [2022-11-20 11:53:32,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:53:32,155 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 206 transitions. [2022-11-20 11:53:32,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.7105263157894735) internal successors, (217), 38 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:53:32,156 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 206 transitions. [2022-11-20 11:53:32,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-11-20 11:53:32,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:32,157 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:53:32,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-20 11:53:32,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-20 11:53:32,365 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:32,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:32,365 INFO L85 PathProgramCache]: Analyzing trace with hash -951388173, now seen corresponding path program 37 times [2022-11-20 11:53:32,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:32,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059794512] [2022-11-20 11:53:32,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:32,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:32,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:35,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 1955 proven. 1085 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:35,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:35,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059794512] [2022-11-20 11:53:35,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059794512] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:53:35,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381049390] [2022-11-20 11:53:35,318 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:53:35,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:53:35,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:53:35,319 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:53:35,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-20 11:53:35,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:35,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-20 11:53:35,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:53:38,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 2046 proven. 992 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:53:38,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:53:40,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 2046 proven. 992 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:53:40,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381049390] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:53:40,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:53:40,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 101 [2022-11-20 11:53:40,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750378060] [2022-11-20 11:53:40,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:53:40,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-20 11:53:40,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:40,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-20 11:53:40,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2281, Invalid=7819, Unknown=0, NotChecked=0, Total=10100 [2022-11-20 11:53:40,009 INFO L87 Difference]: Start difference. First operand 203 states and 206 transitions. Second operand has 101 states, 101 states have (on average 3.3465346534653464) internal successors, (338), 101 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:53:41,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:41,804 INFO L93 Difference]: Finished difference Result 466 states and 534 transitions. [2022-11-20 11:53:41,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-20 11:53:41,804 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.3465346534653464) internal successors, (338), 101 states have internal predecessors, (338), 0 states have call successors, (0), 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 202 [2022-11-20 11:53:41,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:41,806 INFO L225 Difference]: With dead ends: 466 [2022-11-20 11:53:41,806 INFO L226 Difference]: Without dead ends: 333 [2022-11-20 11:53:41,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 308 SyntacticMatches, 62 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6567 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4395, Invalid=13161, Unknown=0, NotChecked=0, Total=17556 [2022-11-20 11:53:41,808 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 438 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:53:41,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 720 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:53:41,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-11-20 11:53:41,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 205. [2022-11-20 11:53:41,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0196078431372548) internal successors, (208), 204 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:53:41,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 208 transitions. [2022-11-20 11:53:41,844 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 208 transitions. Word has length 202 [2022-11-20 11:53:41,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:53:41,844 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 208 transitions. [2022-11-20 11:53:41,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.3465346534653464) internal successors, (338), 101 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:53:41,845 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 208 transitions. [2022-11-20 11:53:41,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-11-20 11:53:41,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:41,846 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:53:41,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-20 11:53:42,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-20 11:53:42,047 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:42,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:42,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1744337320, now seen corresponding path program 38 times [2022-11-20 11:53:42,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:42,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495691689] [2022-11-20 11:53:42,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:42,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 1955 proven. 1149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:44,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:44,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495691689] [2022-11-20 11:53:44,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495691689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:53:44,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826780784] [2022-11-20 11:53:44,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:53:44,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:53:44,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:53:44,965 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:53:44,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-20 11:53:45,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:53:45,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:53:45,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-20 11:53:45,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:53:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 2048 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:47,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:53:49,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 2048 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:49,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826780784] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:53:49,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:53:49,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 103 [2022-11-20 11:53:49,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608390889] [2022-11-20 11:53:49,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:53:49,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-11-20 11:53:49,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:49,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-11-20 11:53:49,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2383, Invalid=8123, Unknown=0, NotChecked=0, Total=10506 [2022-11-20 11:53:49,700 INFO L87 Difference]: Start difference. First operand 205 states and 208 transitions. Second operand has 103 states, 103 states have (on average 3.3009708737864076) internal successors, (340), 103 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:53:51,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:51,672 INFO L93 Difference]: Finished difference Result 474 states and 544 transitions. [2022-11-20 11:53:51,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-20 11:53:51,672 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 3.3009708737864076) internal successors, (340), 103 states have internal predecessors, (340), 0 states have call successors, (0), 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 204 [2022-11-20 11:53:51,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:51,673 INFO L225 Difference]: With dead ends: 474 [2022-11-20 11:53:51,673 INFO L226 Difference]: Without dead ends: 339 [2022-11-20 11:53:51,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 309 SyntacticMatches, 64 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6840 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=4629, Invalid=13731, Unknown=0, NotChecked=0, Total=18360 [2022-11-20 11:53:51,675 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 618 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:53:51,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 699 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 11:53:51,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-11-20 11:53:51,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 207. [2022-11-20 11:53:51,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.0194174757281553) internal successors, (210), 206 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:53:51,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 210 transitions. [2022-11-20 11:53:51,736 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 210 transitions. Word has length 204 [2022-11-20 11:53:51,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:53:51,736 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 210 transitions. [2022-11-20 11:53:51,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 3.3009708737864076) internal successors, (340), 103 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:53:51,737 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 210 transitions. [2022-11-20 11:53:51,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-11-20 11:53:51,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:51,738 INFO L195 NwaCegarLoop]: trace histogram [34, 33, 33, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:53:51,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-20 11:53:51,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-20 11:53:51,939 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:51,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:51,939 INFO L85 PathProgramCache]: Analyzing trace with hash 735711101, now seen corresponding path program 39 times [2022-11-20 11:53:51,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:51,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4768071] [2022-11-20 11:53:51,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:51,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3170 backedges. 1056 proven. 2114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:53,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:53,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4768071] [2022-11-20 11:53:53,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4768071] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:53:53,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469435349] [2022-11-20 11:53:53,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:53:53,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:53:53,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:53:53,602 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:53:53,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-20 11:53:53,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2022-11-20 11:53:53,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:53:53,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-20 11:53:53,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:53:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3170 backedges. 1122 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:54,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:53:55,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3170 backedges. 1122 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:55,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469435349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:53:55,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:53:55,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 40 [2022-11-20 11:53:55,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576399604] [2022-11-20 11:53:55,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:53:55,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-20 11:53:55,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:55,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-20 11:53:55,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=885, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 11:53:55,408 INFO L87 Difference]: Start difference. First operand 207 states and 210 transitions. Second operand has 40 states, 40 states have (on average 5.725) internal successors, (229), 40 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:53:56,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:56,276 INFO L93 Difference]: Finished difference Result 224 states and 228 transitions. [2022-11-20 11:53:56,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-20 11:53:56,276 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.725) internal successors, (229), 40 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2022-11-20 11:53:56,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:56,277 INFO L225 Difference]: With dead ends: 224 [2022-11-20 11:53:56,278 INFO L226 Difference]: Without dead ends: 222 [2022-11-20 11:53:56,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 377 SyntacticMatches, 64 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2662 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2079, Invalid=3621, Unknown=0, NotChecked=0, Total=5700 [2022-11-20 11:53:56,279 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 231 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:53:56,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 311 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:53:56,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-11-20 11:53:56,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 215. [2022-11-20 11:53:56,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.0186915887850467) internal successors, (218), 214 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:53:56,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 218 transitions. [2022-11-20 11:53:56,317 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 218 transitions. Word has length 206 [2022-11-20 11:53:56,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:53:56,317 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 218 transitions. [2022-11-20 11:53:56,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 5.725) internal successors, (229), 40 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:53:56,318 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 218 transitions. [2022-11-20 11:53:56,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-11-20 11:53:56,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:56,319 INFO L195 NwaCegarLoop]: trace histogram [35, 34, 34, 34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:53:56,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-20 11:53:56,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:53:56,528 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:56,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:56,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1013869469, now seen corresponding path program 40 times [2022-11-20 11:53:56,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:56,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113635535] [2022-11-20 11:53:56,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:56,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3434 backedges. 2213 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:59,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:59,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113635535] [2022-11-20 11:53:59,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113635535] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:53:59,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130606487] [2022-11-20 11:53:59,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:53:59,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:53:59,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:53:59,521 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:53:59,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-20 11:53:59,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:53:59,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:53:59,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-20 11:53:59,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:54:02,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3434 backedges. 2312 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:02,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:54:04,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3434 backedges. 2312 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:04,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130606487] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:54:04,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:54:04,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 110 [2022-11-20 11:54:04,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225959135] [2022-11-20 11:54:04,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:54:04,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-11-20 11:54:04,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:54:04,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-11-20 11:54:04,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2740, Invalid=9250, Unknown=0, NotChecked=0, Total=11990 [2022-11-20 11:54:04,886 INFO L87 Difference]: Start difference. First operand 215 states and 218 transitions. Second operand has 110 states, 110 states have (on average 3.3363636363636364) internal successors, (367), 110 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:08,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:54:08,165 INFO L93 Difference]: Finished difference Result 637 states and 712 transitions. [2022-11-20 11:54:08,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-11-20 11:54:08,165 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 3.3363636363636364) internal successors, (367), 110 states have internal predecessors, (367), 0 states have call successors, (0), 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 214 [2022-11-20 11:54:08,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:54:08,168 INFO L225 Difference]: With dead ends: 637 [2022-11-20 11:54:08,168 INFO L226 Difference]: Without dead ends: 359 [2022-11-20 11:54:08,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 324 SyntacticMatches, 65 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10639 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=7744, Invalid=24118, Unknown=0, NotChecked=0, Total=31862 [2022-11-20 11:54:08,171 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 600 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 1155 SdHoareTripleChecker+Invalid, 1530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:54:08,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 1155 Invalid, 1530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 11:54:08,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-11-20 11:54:08,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 219. [2022-11-20 11:54:08,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.018348623853211) internal successors, (222), 218 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:08,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 222 transitions. [2022-11-20 11:54:08,201 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 222 transitions. Word has length 214 [2022-11-20 11:54:08,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:54:08,201 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 222 transitions. [2022-11-20 11:54:08,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 3.3363636363636364) internal successors, (367), 110 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:08,202 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 222 transitions. [2022-11-20 11:54:08,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-20 11:54:08,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:54:08,203 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:54:08,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-20 11:54:08,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-20 11:54:08,410 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:54:08,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:54:08,411 INFO L85 PathProgramCache]: Analyzing trace with hash 567782637, now seen corresponding path program 41 times [2022-11-20 11:54:08,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:54:08,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010549825] [2022-11-20 11:54:08,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:08,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:54:08,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:10,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3572 backedges. 1190 proven. 2382 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:10,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:54:10,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010549825] [2022-11-20 11:54:10,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010549825] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:54:10,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613970981] [2022-11-20 11:54:10,411 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:54:10,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:54:10,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:54:10,413 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:54:10,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-20 11:54:10,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2022-11-20 11:54:10,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:54:10,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-20 11:54:10,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:54:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3572 backedges. 1260 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:11,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:54:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3572 backedges. 1260 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:12,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613970981] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:54:12,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:54:12,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 42 [2022-11-20 11:54:12,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078331818] [2022-11-20 11:54:12,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:54:12,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-20 11:54:12,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:54:12,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-20 11:54:12,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=750, Invalid=972, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 11:54:12,638 INFO L87 Difference]: Start difference. First operand 219 states and 222 transitions. Second operand has 42 states, 42 states have (on average 5.738095238095238) internal successors, (241), 42 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:13,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:54:13,572 INFO L93 Difference]: Finished difference Result 236 states and 240 transitions. [2022-11-20 11:54:13,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-20 11:54:13,573 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 5.738095238095238) internal successors, (241), 42 states have internal predecessors, (241), 0 states have call successors, (0), 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 218 [2022-11-20 11:54:13,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:54:13,574 INFO L225 Difference]: With dead ends: 236 [2022-11-20 11:54:13,575 INFO L226 Difference]: Without dead ends: 234 [2022-11-20 11:54:13,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 399 SyntacticMatches, 68 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2308, Invalid=4012, Unknown=0, NotChecked=0, Total=6320 [2022-11-20 11:54:13,576 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 303 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:54:13,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 359 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:54:13,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-20 11:54:13,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 227. [2022-11-20 11:54:13,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.0176991150442478) internal successors, (230), 226 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:13,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 230 transitions. [2022-11-20 11:54:13,623 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 230 transitions. Word has length 218 [2022-11-20 11:54:13,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:54:13,623 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 230 transitions. [2022-11-20 11:54:13,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.738095238095238) internal successors, (241), 42 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:13,624 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 230 transitions. [2022-11-20 11:54:13,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-11-20 11:54:13,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:54:13,625 INFO L195 NwaCegarLoop]: trace histogram [37, 36, 36, 36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:54:13,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-20 11:54:13,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:54:13,826 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:54:13,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:54:13,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1116914131, now seen corresponding path program 42 times [2022-11-20 11:54:13,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:54:13,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844830633] [2022-11-20 11:54:13,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:13,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:54:13,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3852 backedges. 2487 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:17,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:54:17,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844830633] [2022-11-20 11:54:17,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844830633] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:54:17,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119300207] [2022-11-20 11:54:17,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:54:17,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:54:17,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:54:17,328 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:54:17,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-20 11:54:17,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-11-20 11:54:17,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:54:17,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-20 11:54:17,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:54:20,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3852 backedges. 2592 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:20,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:54:23,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3852 backedges. 2592 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:23,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119300207] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:54:23,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:54:23,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 116 [2022-11-20 11:54:23,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730911682] [2022-11-20 11:54:23,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:54:23,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-11-20 11:54:23,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:54:23,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-11-20 11:54:23,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3044, Invalid=10296, Unknown=0, NotChecked=0, Total=13340 [2022-11-20 11:54:23,246 INFO L87 Difference]: Start difference. First operand 227 states and 230 transitions. Second operand has 116 states, 116 states have (on average 3.336206896551724) internal successors, (387), 116 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:27,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:54:27,297 INFO L93 Difference]: Finished difference Result 673 states and 752 transitions. [2022-11-20 11:54:27,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-11-20 11:54:27,298 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 3.336206896551724) internal successors, (387), 116 states have internal predecessors, (387), 0 states have call successors, (0), 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 226 [2022-11-20 11:54:27,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:54:27,302 INFO L225 Difference]: With dead ends: 673 [2022-11-20 11:54:27,303 INFO L226 Difference]: Without dead ends: 379 [2022-11-20 11:54:27,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 342 SyntacticMatches, 69 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11878 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=8630, Invalid=26902, Unknown=0, NotChecked=0, Total=35532 [2022-11-20 11:54:27,306 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 784 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 1431 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 1916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 1431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:54:27,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [784 Valid, 1310 Invalid, 1916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 1431 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 11:54:27,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-11-20 11:54:27,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 231. [2022-11-20 11:54:27,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.017391304347826) internal successors, (234), 230 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:27,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 234 transitions. [2022-11-20 11:54:27,353 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 234 transitions. Word has length 226 [2022-11-20 11:54:27,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:54:27,354 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 234 transitions. [2022-11-20 11:54:27,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 3.336206896551724) internal successors, (387), 116 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:27,354 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 234 transitions. [2022-11-20 11:54:27,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-20 11:54:27,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:54:27,356 INFO L195 NwaCegarLoop]: trace histogram [38, 37, 37, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:54:27,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-20 11:54:27,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:54:27,563 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:54:27,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:54:27,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1125538653, now seen corresponding path program 43 times [2022-11-20 11:54:27,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:54:27,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533340251] [2022-11-20 11:54:27,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:27,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:54:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3998 backedges. 1332 proven. 2666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:29,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:54:29,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533340251] [2022-11-20 11:54:29,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533340251] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:54:29,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242040263] [2022-11-20 11:54:29,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:54:29,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:54:29,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:54:29,847 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:54:29,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-20 11:54:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:30,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-20 11:54:30,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:54:30,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3998 backedges. 1406 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:30,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:54:32,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3998 backedges. 1406 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:32,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242040263] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:54:32,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:54:32,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 44 [2022-11-20 11:54:32,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746004739] [2022-11-20 11:54:32,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:54:32,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-20 11:54:32,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:54:32,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-20 11:54:32,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=829, Invalid=1063, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 11:54:32,119 INFO L87 Difference]: Start difference. First operand 231 states and 234 transitions. Second operand has 44 states, 44 states have (on average 5.75) internal successors, (253), 44 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:33,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:54:33,118 INFO L93 Difference]: Finished difference Result 248 states and 252 transitions. [2022-11-20 11:54:33,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-11-20 11:54:33,118 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 5.75) internal successors, (253), 44 states have internal predecessors, (253), 0 states have call successors, (0), 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 230 [2022-11-20 11:54:33,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:54:33,120 INFO L225 Difference]: With dead ends: 248 [2022-11-20 11:54:33,120 INFO L226 Difference]: Without dead ends: 246 [2022-11-20 11:54:33,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 421 SyntacticMatches, 72 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3282 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2549, Invalid=4423, Unknown=0, NotChecked=0, Total=6972 [2022-11-20 11:54:33,121 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 437 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:54:33,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 339 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:54:33,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-11-20 11:54:33,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 239. [2022-11-20 11:54:33,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.0168067226890756) internal successors, (242), 238 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:33,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 242 transitions. [2022-11-20 11:54:33,159 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 242 transitions. Word has length 230 [2022-11-20 11:54:33,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:54:33,159 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 242 transitions. [2022-11-20 11:54:33,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.75) internal successors, (253), 44 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:33,160 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 242 transitions. [2022-11-20 11:54:33,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-11-20 11:54:33,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:54:33,161 INFO L195 NwaCegarLoop]: trace histogram [39, 38, 38, 38, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:54:33,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-20 11:54:33,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:54:33,369 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:54:33,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:54:33,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1489764285, now seen corresponding path program 44 times [2022-11-20 11:54:33,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:54:33,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613873141] [2022-11-20 11:54:33,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:33,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:54:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 2777 proven. 1517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:37,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:54:37,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613873141] [2022-11-20 11:54:37,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613873141] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:54:37,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145720855] [2022-11-20 11:54:37,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:54:37,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:54:37,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:54:37,254 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:54:37,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-20 11:54:37,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:54:37,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:54:37,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-20 11:54:37,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:54:40,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 2886 proven. 1406 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:54:40,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:54:43,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 2886 proven. 1406 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:54:43,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145720855] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:54:43,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:54:43,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 119 [2022-11-20 11:54:43,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773862373] [2022-11-20 11:54:43,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:54:43,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-11-20 11:54:43,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:54:43,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-11-20 11:54:43,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3163, Invalid=10879, Unknown=0, NotChecked=0, Total=14042 [2022-11-20 11:54:43,301 INFO L87 Difference]: Start difference. First operand 239 states and 242 transitions. Second operand has 119 states, 119 states have (on average 3.3445378151260505) internal successors, (398), 119 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:45,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:54:45,868 INFO L93 Difference]: Finished difference Result 550 states and 630 transitions. [2022-11-20 11:54:45,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-20 11:54:45,868 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 3.3445378151260505) internal successors, (398), 119 states have internal predecessors, (398), 0 states have call successors, (0), 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 238 [2022-11-20 11:54:45,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:54:45,870 INFO L225 Difference]: With dead ends: 550 [2022-11-20 11:54:45,870 INFO L226 Difference]: Without dead ends: 393 [2022-11-20 11:54:45,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 362 SyntacticMatches, 74 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9171 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=6129, Invalid=18363, Unknown=0, NotChecked=0, Total=24492 [2022-11-20 11:54:45,873 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 600 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:54:45,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 914 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 11:54:45,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-11-20 11:54:45,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 241. [2022-11-20 11:54:45,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.0166666666666666) internal successors, (244), 240 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:45,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 244 transitions. [2022-11-20 11:54:45,915 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 244 transitions. Word has length 238 [2022-11-20 11:54:45,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:54:45,915 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 244 transitions. [2022-11-20 11:54:45,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 3.3445378151260505) internal successors, (398), 119 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:45,915 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 244 transitions. [2022-11-20 11:54:45,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-11-20 11:54:45,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:54:45,916 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:54:45,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-20 11:54:46,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-20 11:54:46,118 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:54:46,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:54:46,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1569193944, now seen corresponding path program 45 times [2022-11-20 11:54:46,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:54:46,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076742042] [2022-11-20 11:54:46,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:46,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:54:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:50,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 2777 proven. 1593 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:50,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:54:50,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076742042] [2022-11-20 11:54:50,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076742042] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:54:50,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253751976] [2022-11-20 11:54:50,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:54:50,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:54:50,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:54:50,003 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:54:50,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-20 11:54:50,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2022-11-20 11:54:50,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:54:50,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-20 11:54:50,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:54:53,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 2888 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:53,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:54:56,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 2888 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:56,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253751976] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:54:56,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:54:56,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 80] total 121 [2022-11-20 11:54:56,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109558942] [2022-11-20 11:54:56,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:54:56,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-11-20 11:54:56,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:54:56,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-11-20 11:54:56,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3283, Invalid=11237, Unknown=0, NotChecked=0, Total=14520 [2022-11-20 11:54:56,716 INFO L87 Difference]: Start difference. First operand 241 states and 244 transitions. Second operand has 121 states, 121 states have (on average 3.3057851239669422) internal successors, (400), 121 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:59,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:54:59,330 INFO L93 Difference]: Finished difference Result 558 states and 640 transitions. [2022-11-20 11:54:59,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-20 11:54:59,331 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 3.3057851239669422) internal successors, (400), 121 states have internal predecessors, (400), 0 states have call successors, (0), 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 240 [2022-11-20 11:54:59,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:54:59,332 INFO L225 Difference]: With dead ends: 558 [2022-11-20 11:54:59,332 INFO L226 Difference]: Without dead ends: 399 [2022-11-20 11:54:59,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 363 SyntacticMatches, 76 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9492 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=6405, Invalid=19035, Unknown=0, NotChecked=0, Total=25440 [2022-11-20 11:54:59,335 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 514 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:54:59,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 1015 Invalid, 1335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 11:54:59,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-11-20 11:54:59,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 243. [2022-11-20 11:54:59,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.0165289256198347) internal successors, (246), 242 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:59,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 246 transitions. [2022-11-20 11:54:59,370 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 246 transitions. Word has length 240 [2022-11-20 11:54:59,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:54:59,370 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 246 transitions. [2022-11-20 11:54:59,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 3.3057851239669422) internal successors, (400), 121 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:59,371 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 246 transitions. [2022-11-20 11:54:59,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-20 11:54:59,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:54:59,372 INFO L195 NwaCegarLoop]: trace histogram [40, 39, 39, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:54:59,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-20 11:54:59,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-20 11:54:59,575 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:54:59,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:54:59,575 INFO L85 PathProgramCache]: Analyzing trace with hash -591684915, now seen corresponding path program 46 times [2022-11-20 11:54:59,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:54:59,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403248913] [2022-11-20 11:54:59,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:59,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:54:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:02,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4448 backedges. 1482 proven. 2966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:02,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:55:02,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403248913] [2022-11-20 11:55:02,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403248913] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:55:02,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352445079] [2022-11-20 11:55:02,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:55:02,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:55:02,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:55:02,105 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:55:02,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-20 11:55:02,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:55:02,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:55:02,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-20 11:55:02,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:55:02,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4448 backedges. 1560 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:02,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:55:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4448 backedges. 1560 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:04,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352445079] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:55:04,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:55:04,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 46 [2022-11-20 11:55:04,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534510762] [2022-11-20 11:55:04,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:55:04,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-20 11:55:04,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:55:04,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-20 11:55:04,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=912, Invalid=1158, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 11:55:04,724 INFO L87 Difference]: Start difference. First operand 243 states and 246 transitions. Second operand has 46 states, 46 states have (on average 5.760869565217392) internal successors, (265), 46 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:05,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:05,817 INFO L93 Difference]: Finished difference Result 260 states and 264 transitions. [2022-11-20 11:55:05,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-20 11:55:05,818 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 5.760869565217392) internal successors, (265), 46 states have internal predecessors, (265), 0 states have call successors, (0), 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 242 [2022-11-20 11:55:05,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:05,819 INFO L225 Difference]: With dead ends: 260 [2022-11-20 11:55:05,819 INFO L226 Difference]: Without dead ends: 258 [2022-11-20 11:55:05,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 443 SyntacticMatches, 76 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3616 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2802, Invalid=4854, Unknown=0, NotChecked=0, Total=7656 [2022-11-20 11:55:05,820 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 259 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:05,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 448 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:55:05,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-11-20 11:55:05,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 251. [2022-11-20 11:55:05,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.016) internal successors, (254), 250 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:05,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 254 transitions. [2022-11-20 11:55:05,864 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 254 transitions. Word has length 242 [2022-11-20 11:55:05,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:05,864 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 254 transitions. [2022-11-20 11:55:05,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 5.760869565217392) internal successors, (265), 46 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:05,864 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 254 transitions. [2022-11-20 11:55:05,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-11-20 11:55:05,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:05,866 INFO L195 NwaCegarLoop]: trace histogram [41, 40, 40, 40, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:55:05,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-20 11:55:06,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-20 11:55:06,067 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:55:06,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:06,067 INFO L85 PathProgramCache]: Analyzing trace with hash -2128949325, now seen corresponding path program 47 times [2022-11-20 11:55:06,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:55:06,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322943795] [2022-11-20 11:55:06,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:06,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:55:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 3083 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:10,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:55:10,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322943795] [2022-11-20 11:55:10,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322943795] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:55:10,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463630596] [2022-11-20 11:55:10,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:55:10,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:55:10,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:55:10,050 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:55:10,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-20 11:55:10,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2022-11-20 11:55:10,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:55:10,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-20 11:55:10,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:55:14,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 3200 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:14,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:55:17,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 3200 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:17,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463630596] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:55:17,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:55:17,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 128 [2022-11-20 11:55:17,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203411430] [2022-11-20 11:55:17,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:55:17,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-11-20 11:55:17,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:55:17,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-11-20 11:55:17,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3700, Invalid=12556, Unknown=0, NotChecked=0, Total=16256 [2022-11-20 11:55:17,199 INFO L87 Difference]: Start difference. First operand 251 states and 254 transitions. Second operand has 128 states, 128 states have (on average 3.3359375) internal successors, (427), 128 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:21,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:21,867 INFO L93 Difference]: Finished difference Result 745 states and 832 transitions. [2022-11-20 11:55:21,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-11-20 11:55:21,867 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 3.3359375) internal successors, (427), 128 states have internal predecessors, (427), 0 states have call successors, (0), 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 250 [2022-11-20 11:55:21,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:21,868 INFO L225 Difference]: With dead ends: 745 [2022-11-20 11:55:21,868 INFO L226 Difference]: Without dead ends: 419 [2022-11-20 11:55:21,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 378 SyntacticMatches, 77 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14560 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=10546, Invalid=32926, Unknown=0, NotChecked=0, Total=43472 [2022-11-20 11:55:21,872 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 992 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 1909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:21,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [992 Valid, 1135 Invalid, 1909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 11:55:21,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-11-20 11:55:21,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 255. [2022-11-20 11:55:21,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.015748031496063) internal successors, (258), 254 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:21,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 258 transitions. [2022-11-20 11:55:21,923 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 258 transitions. Word has length 250 [2022-11-20 11:55:21,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:21,924 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 258 transitions. [2022-11-20 11:55:21,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 3.3359375) internal successors, (427), 128 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:21,924 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 258 transitions. [2022-11-20 11:55:21,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-11-20 11:55:21,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:21,926 INFO L195 NwaCegarLoop]: trace histogram [42, 41, 41, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:55:21,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-20 11:55:22,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:55:22,126 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:55:22,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:22,127 INFO L85 PathProgramCache]: Analyzing trace with hash 145550141, now seen corresponding path program 48 times [2022-11-20 11:55:22,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:55:22,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163973781] [2022-11-20 11:55:22,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:22,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:55:22,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:24,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4922 backedges. 1640 proven. 3282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:24,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:55:24,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163973781] [2022-11-20 11:55:24,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163973781] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:55:24,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64055489] [2022-11-20 11:55:24,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:55:24,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:55:24,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:55:24,841 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:55:24,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-20 11:55:25,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2022-11-20 11:55:25,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:55:25,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-20 11:55:25,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:55:25,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4922 backedges. 1722 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:25,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:55:27,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4922 backedges. 1722 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:27,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64055489] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:55:27,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:55:27,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 48 [2022-11-20 11:55:27,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142366569] [2022-11-20 11:55:27,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:55:27,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 11:55:27,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:55:27,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 11:55:27,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=999, Invalid=1257, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 11:55:27,533 INFO L87 Difference]: Start difference. First operand 255 states and 258 transitions. Second operand has 48 states, 48 states have (on average 5.770833333333333) internal successors, (277), 48 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:28,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:28,736 INFO L93 Difference]: Finished difference Result 272 states and 276 transitions. [2022-11-20 11:55:28,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-11-20 11:55:28,737 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 5.770833333333333) internal successors, (277), 48 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 254 [2022-11-20 11:55:28,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:28,739 INFO L225 Difference]: With dead ends: 272 [2022-11-20 11:55:28,739 INFO L226 Difference]: Without dead ends: 270 [2022-11-20 11:55:28,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 465 SyntacticMatches, 80 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3966 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3067, Invalid=5305, Unknown=0, NotChecked=0, Total=8372 [2022-11-20 11:55:28,740 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 401 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:28,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 350 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:55:28,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-11-20 11:55:28,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 263. [2022-11-20 11:55:28,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.015267175572519) internal successors, (266), 262 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:28,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 266 transitions. [2022-11-20 11:55:28,779 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 266 transitions. Word has length 254 [2022-11-20 11:55:28,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:28,779 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 266 transitions. [2022-11-20 11:55:28,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 5.770833333333333) internal successors, (277), 48 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:28,779 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 266 transitions. [2022-11-20 11:55:28,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-11-20 11:55:28,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:28,781 INFO L195 NwaCegarLoop]: trace histogram [43, 42, 42, 42, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:55:28,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-20 11:55:28,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:55:28,981 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:55:28,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:28,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1823256611, now seen corresponding path program 49 times [2022-11-20 11:55:28,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:55:28,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561170914] [2022-11-20 11:55:28,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:28,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:55:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:33,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5250 backedges. 3405 proven. 1845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:33,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:55:33,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561170914] [2022-11-20 11:55:33,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561170914] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:55:33,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882908413] [2022-11-20 11:55:33,457 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:55:33,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:55:33,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:55:33,458 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:55:33,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-20 11:55:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:33,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-20 11:55:33,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:55:37,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5250 backedges. 3526 proven. 1722 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:55:37,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:55:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5250 backedges. 3526 proven. 1722 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:55:40,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882908413] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:55:40,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:55:40,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86, 86] total 131 [2022-11-20 11:55:40,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903274175] [2022-11-20 11:55:40,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:55:40,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-11-20 11:55:40,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:55:40,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-11-20 11:55:40,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3831, Invalid=13199, Unknown=0, NotChecked=0, Total=17030 [2022-11-20 11:55:40,591 INFO L87 Difference]: Start difference. First operand 263 states and 266 transitions. Second operand has 131 states, 131 states have (on average 3.3435114503816794) internal successors, (438), 131 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:43,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:43,510 INFO L93 Difference]: Finished difference Result 606 states and 694 transitions. [2022-11-20 11:55:43,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-20 11:55:43,510 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 3.3435114503816794) internal successors, (438), 131 states have internal predecessors, (438), 0 states have call successors, (0), 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 262 [2022-11-20 11:55:43,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:43,513 INFO L225 Difference]: With dead ends: 606 [2022-11-20 11:55:43,513 INFO L226 Difference]: Without dead ends: 433 [2022-11-20 11:55:43,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 398 SyntacticMatches, 82 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11147 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=7445, Invalid=22311, Unknown=0, NotChecked=0, Total=29756 [2022-11-20 11:55:43,515 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 664 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:43,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [664 Valid, 1004 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 11:55:43,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-11-20 11:55:43,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 265. [2022-11-20 11:55:43,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.0151515151515151) internal successors, (268), 264 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:43,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 268 transitions. [2022-11-20 11:55:43,581 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 268 transitions. Word has length 262 [2022-11-20 11:55:43,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:43,581 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 268 transitions. [2022-11-20 11:55:43,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 3.3435114503816794) internal successors, (438), 131 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:43,582 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 268 transitions. [2022-11-20 11:55:43,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-11-20 11:55:43,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:43,584 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:55:43,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-20 11:55:43,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:55:43,792 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:55:43,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:43,793 INFO L85 PathProgramCache]: Analyzing trace with hash -354905848, now seen corresponding path program 50 times [2022-11-20 11:55:43,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:55:43,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021993764] [2022-11-20 11:55:43,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:43,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:55:43,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 3405 proven. 1929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:48,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:55:48,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021993764] [2022-11-20 11:55:48,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021993764] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:55:48,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009301372] [2022-11-20 11:55:48,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:55:48,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:55:48,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:55:48,527 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:55:48,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-20 11:55:48,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:55:48,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:55:48,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-20 11:55:48,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:55:52,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 3528 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:52,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:55:55,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 3528 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:55,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009301372] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:55:55,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:55:55,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88, 88] total 133 [2022-11-20 11:55:55,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627370037] [2022-11-20 11:55:55,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:55:55,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-11-20 11:55:55,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:55:55,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-11-20 11:55:55,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3963, Invalid=13593, Unknown=0, NotChecked=0, Total=17556 [2022-11-20 11:55:55,976 INFO L87 Difference]: Start difference. First operand 265 states and 268 transitions. Second operand has 133 states, 133 states have (on average 3.308270676691729) internal successors, (440), 133 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:59,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:59,046 INFO L93 Difference]: Finished difference Result 614 states and 704 transitions. [2022-11-20 11:55:59,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-11-20 11:55:59,047 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 3.308270676691729) internal successors, (440), 133 states have internal predecessors, (440), 0 states have call successors, (0), 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 264 [2022-11-20 11:55:59,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:59,049 INFO L225 Difference]: With dead ends: 614 [2022-11-20 11:55:59,049 INFO L226 Difference]: Without dead ends: 439 [2022-11-20 11:55:59,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 657 GetRequests, 399 SyntacticMatches, 84 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11500 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=7749, Invalid=23051, Unknown=0, NotChecked=0, Total=30800 [2022-11-20 11:55:59,052 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 652 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:59,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [652 Valid, 1005 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 11:55:59,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-11-20 11:55:59,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 267. [2022-11-20 11:55:59,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.0150375939849625) internal successors, (270), 266 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:59,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 270 transitions. [2022-11-20 11:55:59,122 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 270 transitions. Word has length 264 [2022-11-20 11:55:59,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:59,122 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 270 transitions. [2022-11-20 11:55:59,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 3.308270676691729) internal successors, (440), 133 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:59,123 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 270 transitions. [2022-11-20 11:55:59,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-20 11:55:59,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:59,125 INFO L195 NwaCegarLoop]: trace histogram [44, 43, 43, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:55:59,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-20 11:55:59,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-11-20 11:55:59,332 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:55:59,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:59,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1919955795, now seen corresponding path program 51 times [2022-11-20 11:55:59,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:55:59,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399151112] [2022-11-20 11:55:59,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:59,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:55:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:02,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5420 backedges. 1806 proven. 3614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:02,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:02,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399151112] [2022-11-20 11:56:02,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399151112] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:56:02,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765821165] [2022-11-20 11:56:02,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:56:02,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:56:02,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:56:02,809 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:56:02,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-20 11:56:03,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2022-11-20 11:56:03,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:56:03,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-20 11:56:03,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:56:03,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5420 backedges. 1892 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:03,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:56:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5420 backedges. 1892 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:05,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765821165] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:56:05,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:56:05,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 50 [2022-11-20 11:56:05,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160509418] [2022-11-20 11:56:05,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:56:05,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-20 11:56:05,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:05,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-20 11:56:05,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1090, Invalid=1360, Unknown=0, NotChecked=0, Total=2450 [2022-11-20 11:56:05,828 INFO L87 Difference]: Start difference. First operand 267 states and 270 transitions. Second operand has 50 states, 50 states have (on average 5.78) internal successors, (289), 50 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:07,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:07,084 INFO L93 Difference]: Finished difference Result 284 states and 288 transitions. [2022-11-20 11:56:07,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-20 11:56:07,085 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.78) internal successors, (289), 50 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-20 11:56:07,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:07,086 INFO L225 Difference]: With dead ends: 284 [2022-11-20 11:56:07,086 INFO L226 Difference]: Without dead ends: 282 [2022-11-20 11:56:07,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 665 GetRequests, 487 SyntacticMatches, 84 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4332 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3344, Invalid=5776, Unknown=0, NotChecked=0, Total=9120 [2022-11-20 11:56:07,088 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 281 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:07,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 465 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:56:07,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-11-20 11:56:07,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 275. [2022-11-20 11:56:07,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.0145985401459854) internal successors, (278), 274 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:07,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 278 transitions. [2022-11-20 11:56:07,144 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 278 transitions. Word has length 266 [2022-11-20 11:56:07,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:07,144 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 278 transitions. [2022-11-20 11:56:07,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.78) internal successors, (289), 50 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:07,144 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 278 transitions. [2022-11-20 11:56:07,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-11-20 11:56:07,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:07,145 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 44, 44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:56:07,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-11-20 11:56:07,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:56:07,346 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:56:07,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:07,347 INFO L85 PathProgramCache]: Analyzing trace with hash -217112173, now seen corresponding path program 52 times [2022-11-20 11:56:07,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:07,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671284534] [2022-11-20 11:56:07,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:07,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:07,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:12,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5764 backedges. 3743 proven. 2021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:12,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:12,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671284534] [2022-11-20 11:56:12,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671284534] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:56:12,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645113183] [2022-11-20 11:56:12,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:56:12,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:56:12,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:56:12,290 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:56:12,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-20 11:56:12,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:56:12,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:56:12,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-20 11:56:12,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:56:17,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5764 backedges. 3872 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:17,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:56:20,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5764 backedges. 3872 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:20,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645113183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:56:20,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:56:20,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91, 91] total 140 [2022-11-20 11:56:20,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466430325] [2022-11-20 11:56:20,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:56:20,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-11-20 11:56:20,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:20,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-11-20 11:56:20,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4420, Invalid=15040, Unknown=0, NotChecked=0, Total=19460 [2022-11-20 11:56:20,474 INFO L87 Difference]: Start difference. First operand 275 states and 278 transitions. Second operand has 140 states, 140 states have (on average 3.335714285714286) internal successors, (467), 140 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:25,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:25,898 INFO L93 Difference]: Finished difference Result 817 states and 912 transitions. [2022-11-20 11:56:25,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-11-20 11:56:25,898 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 3.335714285714286) internal successors, (467), 140 states have internal predecessors, (467), 0 states have call successors, (0), 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 274 [2022-11-20 11:56:25,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:25,899 INFO L225 Difference]: With dead ends: 817 [2022-11-20 11:56:25,899 INFO L226 Difference]: Without dead ends: 459 [2022-11-20 11:56:25,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 414 SyntacticMatches, 85 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17514 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=12654, Invalid=39558, Unknown=0, NotChecked=0, Total=52212 [2022-11-20 11:56:25,903 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 822 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 1328 SdHoareTripleChecker+Invalid, 1883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:25,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [822 Valid, 1328 Invalid, 1883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 1468 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 11:56:25,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-11-20 11:56:25,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 279. [2022-11-20 11:56:25,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.014388489208633) internal successors, (282), 278 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:25,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 282 transitions. [2022-11-20 11:56:25,956 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 282 transitions. Word has length 274 [2022-11-20 11:56:25,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:25,956 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 282 transitions. [2022-11-20 11:56:25,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 3.335714285714286) internal successors, (467), 140 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:25,957 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 282 transitions. [2022-11-20 11:56:25,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-20 11:56:25,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:25,959 INFO L195 NwaCegarLoop]: trace histogram [46, 45, 45, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:56:25,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-11-20 11:56:26,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:56:26,159 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:56:26,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:26,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1094074595, now seen corresponding path program 53 times [2022-11-20 11:56:26,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:26,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742092116] [2022-11-20 11:56:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:26,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5942 backedges. 1980 proven. 3962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:29,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:29,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742092116] [2022-11-20 11:56:29,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742092116] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:56:29,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969408390] [2022-11-20 11:56:29,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:56:29,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:56:29,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:56:29,155 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:56:29,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-20 11:56:29,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2022-11-20 11:56:29,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:56:29,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-20 11:56:29,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:56:29,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5942 backedges. 2070 proven. 3872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:29,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:56:32,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5942 backedges. 2070 proven. 3872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:32,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969408390] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:56:32,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:56:32,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 52 [2022-11-20 11:56:32,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796596452] [2022-11-20 11:56:32,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:56:32,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-20 11:56:32,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:32,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-20 11:56:32,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1185, Invalid=1467, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 11:56:32,206 INFO L87 Difference]: Start difference. First operand 279 states and 282 transitions. Second operand has 52 states, 52 states have (on average 5.788461538461538) internal successors, (301), 52 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:33,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:33,562 INFO L93 Difference]: Finished difference Result 296 states and 300 transitions. [2022-11-20 11:56:33,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-20 11:56:33,563 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 5.788461538461538) internal successors, (301), 52 states have internal predecessors, (301), 0 states have call successors, (0), 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 278 [2022-11-20 11:56:33,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:33,565 INFO L225 Difference]: With dead ends: 296 [2022-11-20 11:56:33,565 INFO L226 Difference]: Without dead ends: 294 [2022-11-20 11:56:33,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 695 GetRequests, 509 SyntacticMatches, 88 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4714 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3633, Invalid=6267, Unknown=0, NotChecked=0, Total=9900 [2022-11-20 11:56:33,567 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 429 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:33,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 434 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:56:33,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-11-20 11:56:33,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 287. [2022-11-20 11:56:33,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.013986013986014) internal successors, (290), 286 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:33,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 290 transitions. [2022-11-20 11:56:33,625 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 290 transitions. Word has length 278 [2022-11-20 11:56:33,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:33,626 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 290 transitions. [2022-11-20 11:56:33,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 5.788461538461538) internal successors, (301), 52 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:33,626 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 290 transitions. [2022-11-20 11:56:33,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-11-20 11:56:33,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:33,628 INFO L195 NwaCegarLoop]: trace histogram [47, 46, 46, 46, 46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:56:33,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-11-20 11:56:33,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-11-20 11:56:33,835 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:56:33,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:33,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1780982787, now seen corresponding path program 54 times [2022-11-20 11:56:33,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:33,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243647912] [2022-11-20 11:56:33,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:33,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:33,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6302 backedges. 4097 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:39,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:39,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243647912] [2022-11-20 11:56:39,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243647912] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:56:39,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242155260] [2022-11-20 11:56:39,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:56:39,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:56:39,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:56:39,155 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:56:39,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-20 11:56:39,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2022-11-20 11:56:39,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:56:39,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-20 11:56:39,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:56:44,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6302 backedges. 4232 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:44,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:56:47,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6302 backedges. 4232 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:47,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242155260] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:56:47,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:56:47,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 146 [2022-11-20 11:56:47,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767339255] [2022-11-20 11:56:47,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:56:47,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-11-20 11:56:47,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:47,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-11-20 11:56:47,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4804, Invalid=16366, Unknown=0, NotChecked=0, Total=21170 [2022-11-20 11:56:47,866 INFO L87 Difference]: Start difference. First operand 287 states and 290 transitions. Second operand has 146 states, 146 states have (on average 3.335616438356164) internal successors, (487), 146 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:53,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:53,708 INFO L93 Difference]: Finished difference Result 853 states and 952 transitions. [2022-11-20 11:56:53,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-11-20 11:56:53,708 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 3.335616438356164) internal successors, (487), 146 states have internal predecessors, (487), 0 states have call successors, (0), 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 286 [2022-11-20 11:56:53,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:53,710 INFO L225 Difference]: With dead ends: 853 [2022-11-20 11:56:53,711 INFO L226 Difference]: Without dead ends: 479 [2022-11-20 11:56:53,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 758 GetRequests, 432 SyntacticMatches, 89 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19093 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=13780, Invalid=43102, Unknown=0, NotChecked=0, Total=56882 [2022-11-20 11:56:53,714 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 995 mSDsluCounter, 1336 mSDsCounter, 0 mSdLazyCounter, 1579 mSolverCounterSat, 564 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 1433 SdHoareTripleChecker+Invalid, 2143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 564 IncrementalHoareTripleChecker+Valid, 1579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:53,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [995 Valid, 1433 Invalid, 2143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [564 Valid, 1579 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 11:56:53,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-11-20 11:56:53,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 291. [2022-11-20 11:56:53,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.013793103448276) internal successors, (294), 290 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:53,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 294 transitions. [2022-11-20 11:56:53,761 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 294 transitions. Word has length 286 [2022-11-20 11:56:53,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:53,761 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 294 transitions. [2022-11-20 11:56:53,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 3.335616438356164) internal successors, (487), 146 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:53,762 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 294 transitions. [2022-11-20 11:56:53,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-11-20 11:56:53,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:53,764 INFO L195 NwaCegarLoop]: trace histogram [48, 47, 47, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:56:53,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-11-20 11:56:53,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-11-20 11:56:53,972 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:56:53,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:53,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1551909517, now seen corresponding path program 55 times [2022-11-20 11:56:53,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:53,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086089832] [2022-11-20 11:56:53,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:53,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6488 backedges. 2162 proven. 4326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:57,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:57,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086089832] [2022-11-20 11:56:57,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086089832] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:56:57,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015743067] [2022-11-20 11:56:57,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:56:57,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:56:57,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:56:57,431 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:56:57,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-20 11:56:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:57,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-20 11:56:57,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:56:58,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6488 backedges. 2256 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:58,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:57:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6488 backedges. 2256 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:57:00,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015743067] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:57:00,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:57:00,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 54 [2022-11-20 11:57:00,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13292948] [2022-11-20 11:57:00,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:57:00,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-20 11:57:00,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:57:00,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-20 11:57:00,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1284, Invalid=1578, Unknown=0, NotChecked=0, Total=2862 [2022-11-20 11:57:00,669 INFO L87 Difference]: Start difference. First operand 291 states and 294 transitions. Second operand has 54 states, 54 states have (on average 5.796296296296297) internal successors, (313), 54 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:02,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:57:02,097 INFO L93 Difference]: Finished difference Result 308 states and 312 transitions. [2022-11-20 11:57:02,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-11-20 11:57:02,098 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 5.796296296296297) internal successors, (313), 54 states have internal predecessors, (313), 0 states have call successors, (0), 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 290 [2022-11-20 11:57:02,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:57:02,099 INFO L225 Difference]: With dead ends: 308 [2022-11-20 11:57:02,099 INFO L226 Difference]: Without dead ends: 306 [2022-11-20 11:57:02,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 531 SyntacticMatches, 92 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5112 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3934, Invalid=6778, Unknown=0, NotChecked=0, Total=10712 [2022-11-20 11:57:02,101 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 307 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:57:02,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 509 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:57:02,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-11-20 11:57:02,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 299. [2022-11-20 11:57:02,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.0134228187919463) internal successors, (302), 298 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:02,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 302 transitions. [2022-11-20 11:57:02,167 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 302 transitions. Word has length 290 [2022-11-20 11:57:02,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:57:02,167 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 302 transitions. [2022-11-20 11:57:02,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 5.796296296296297) internal successors, (313), 54 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:02,168 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 302 transitions. [2022-11-20 11:57:02,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-11-20 11:57:02,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:57:02,170 INFO L195 NwaCegarLoop]: trace histogram [49, 48, 48, 48, 48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:57:02,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-11-20 11:57:02,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-11-20 11:57:02,370 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:57:02,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:57:02,371 INFO L85 PathProgramCache]: Analyzing trace with hash -727992461, now seen corresponding path program 56 times [2022-11-20 11:57:02,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:57:02,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049165640] [2022-11-20 11:57:02,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:57:02,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:57:02,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:57:08,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6864 backedges. 4467 proven. 2397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:57:08,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:57:08,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049165640] [2022-11-20 11:57:08,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049165640] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:57:08,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640530276] [2022-11-20 11:57:08,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:57:08,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:57:08,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:57:08,185 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:57:08,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-20 11:57:08,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:57:08,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:57:08,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-20 11:57:08,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:57:13,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6864 backedges. 4606 proven. 2256 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:57:13,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:57:17,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6864 backedges. 4606 proven. 2256 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:57:17,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640530276] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:57:17,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:57:17,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 98, 98] total 149 [2022-11-20 11:57:17,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207090353] [2022-11-20 11:57:17,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:57:17,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-11-20 11:57:17,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:57:17,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-11-20 11:57:17,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4953, Invalid=17099, Unknown=0, NotChecked=0, Total=22052 [2022-11-20 11:57:17,678 INFO L87 Difference]: Start difference. First operand 299 states and 302 transitions. Second operand has 149 states, 149 states have (on average 3.3422818791946307) internal successors, (498), 149 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:21,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:57:21,593 INFO L93 Difference]: Finished difference Result 690 states and 790 transitions. [2022-11-20 11:57:21,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-20 11:57:21,594 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 3.3422818791946307) internal successors, (498), 149 states have internal predecessors, (498), 0 states have call successors, (0), 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 298 [2022-11-20 11:57:21,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:57:21,597 INFO L225 Difference]: With dead ends: 690 [2022-11-20 11:57:21,597 INFO L226 Difference]: Without dead ends: 493 [2022-11-20 11:57:21,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 741 GetRequests, 452 SyntacticMatches, 94 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14471 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=9659, Invalid=28953, Unknown=0, NotChecked=0, Total=38612 [2022-11-20 11:57:21,600 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 738 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:57:21,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [738 Valid, 1135 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 1270 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 11:57:21,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-11-20 11:57:21,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 301. [2022-11-20 11:57:21,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.0133333333333334) internal successors, (304), 300 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:21,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 304 transitions. [2022-11-20 11:57:21,653 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 304 transitions. Word has length 298 [2022-11-20 11:57:21,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:57:21,654 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 304 transitions. [2022-11-20 11:57:21,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 3.3422818791946307) internal successors, (498), 149 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:21,654 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 304 transitions. [2022-11-20 11:57:21,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2022-11-20 11:57:21,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:57:21,656 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:57:21,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-11-20 11:57:21,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:57:21,863 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:57:21,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:57:21,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1199032792, now seen corresponding path program 57 times [2022-11-20 11:57:21,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:57:21,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518123001] [2022-11-20 11:57:21,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:57:21,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:57:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:57:27,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6960 backedges. 4467 proven. 2493 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:57:27,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:57:27,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518123001] [2022-11-20 11:57:27,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518123001] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:57:27,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726825676] [2022-11-20 11:57:27,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:57:27,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:57:27,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:57:27,784 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:57:27,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-20 11:57:28,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 49 check-sat command(s) [2022-11-20 11:57:28,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:57:28,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-20 11:57:28,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:57:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6960 backedges. 4608 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:57:33,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:57:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6960 backedges. 4608 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:57:37,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726825676] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:57:37,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:57:37,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100, 100] total 151 [2022-11-20 11:57:37,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410826071] [2022-11-20 11:57:37,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:57:37,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2022-11-20 11:57:37,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:57:37,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2022-11-20 11:57:37,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5103, Invalid=17547, Unknown=0, NotChecked=0, Total=22650 [2022-11-20 11:57:37,537 INFO L87 Difference]: Start difference. First operand 301 states and 304 transitions. Second operand has 151 states, 151 states have (on average 3.3112582781456954) internal successors, (500), 151 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:41,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:57:41,557 INFO L93 Difference]: Finished difference Result 698 states and 800 transitions. [2022-11-20 11:57:41,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-20 11:57:41,557 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 3.3112582781456954) internal successors, (500), 151 states have internal predecessors, (500), 0 states have call successors, (0), 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 300 [2022-11-20 11:57:41,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:57:41,559 INFO L225 Difference]: With dead ends: 698 [2022-11-20 11:57:41,559 INFO L226 Difference]: Without dead ends: 499 [2022-11-20 11:57:41,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 747 GetRequests, 453 SyntacticMatches, 96 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14872 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=10005, Invalid=29795, Unknown=0, NotChecked=0, Total=39800 [2022-11-20 11:57:41,562 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 773 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 508 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 1863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 508 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:57:41,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [773 Valid, 1219 Invalid, 1863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [508 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 11:57:41,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-11-20 11:57:41,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 303. [2022-11-20 11:57:41,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.0132450331125828) internal successors, (306), 302 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:41,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 306 transitions. [2022-11-20 11:57:41,621 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 306 transitions. Word has length 300 [2022-11-20 11:57:41,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:57:41,621 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 306 transitions. [2022-11-20 11:57:41,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 3.3112582781456954) internal successors, (500), 151 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:41,622 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 306 transitions. [2022-11-20 11:57:41,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-11-20 11:57:41,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:57:41,624 INFO L195 NwaCegarLoop]: trace histogram [50, 49, 49, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:57:41,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-11-20 11:57:41,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-11-20 11:57:41,831 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:57:41,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:57:41,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1939396349, now seen corresponding path program 58 times [2022-11-20 11:57:41,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:57:41,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872217438] [2022-11-20 11:57:41,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:57:41,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:57:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:57:45,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7058 backedges. 2352 proven. 4706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:57:45,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:57:45,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872217438] [2022-11-20 11:57:45,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872217438] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:57:45,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491932927] [2022-11-20 11:57:45,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:57:45,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:57:45,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:57:45,437 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:57:45,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-20 11:57:45,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:57:45,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:57:45,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-20 11:57:45,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:57:46,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7058 backedges. 2450 proven. 4608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:57:46,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:57:48,783 INFO L134 CoverageAnalysis]: Checked inductivity of 7058 backedges. 2450 proven. 4608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:57:48,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491932927] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:57:48,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:57:48,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 56 [2022-11-20 11:57:48,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189485376] [2022-11-20 11:57:48,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:57:48,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-20 11:57:48,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:57:48,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-20 11:57:48,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1387, Invalid=1693, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 11:57:48,786 INFO L87 Difference]: Start difference. First operand 303 states and 306 transitions. Second operand has 56 states, 56 states have (on average 5.803571428571429) internal successors, (325), 56 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:50,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:57:50,293 INFO L93 Difference]: Finished difference Result 320 states and 324 transitions. [2022-11-20 11:57:50,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-11-20 11:57:50,294 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 5.803571428571429) internal successors, (325), 56 states have internal predecessors, (325), 0 states have call successors, (0), 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 302 [2022-11-20 11:57:50,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:57:50,295 INFO L225 Difference]: With dead ends: 320 [2022-11-20 11:57:50,295 INFO L226 Difference]: Without dead ends: 318 [2022-11-20 11:57:50,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 755 GetRequests, 553 SyntacticMatches, 96 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5526 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4247, Invalid=7309, Unknown=0, NotChecked=0, Total=11556 [2022-11-20 11:57:50,296 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 475 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:57:50,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 405 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:57:50,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-11-20 11:57:50,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 311. [2022-11-20 11:57:50,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.0129032258064516) internal successors, (314), 310 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:50,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 314 transitions. [2022-11-20 11:57:50,375 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 314 transitions. Word has length 302 [2022-11-20 11:57:50,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:57:50,375 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 314 transitions. [2022-11-20 11:57:50,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 5.803571428571429) internal successors, (325), 56 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:50,375 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 314 transitions. [2022-11-20 11:57:50,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-11-20 11:57:50,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:57:50,377 INFO L195 NwaCegarLoop]: trace histogram [51, 50, 50, 50, 50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:57:50,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-11-20 11:57:50,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:57:50,578 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:57:50,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:57:50,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1043276829, now seen corresponding path program 59 times [2022-11-20 11:57:50,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:57:50,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780993251] [2022-11-20 11:57:50,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:57:50,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:57:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:57:57,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7450 backedges. 4853 proven. 2597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:57:57,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:57:57,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780993251] [2022-11-20 11:57:57,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780993251] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:57:57,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197873800] [2022-11-20 11:57:57,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:57:57,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:57:57,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:57:57,076 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:57:57,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-20 11:57:57,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 51 check-sat command(s) [2022-11-20 11:57:57,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:57:57,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-20 11:57:57,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:58:03,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7450 backedges. 5000 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:58:03,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:58:07,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7450 backedges. 5000 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:58:07,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197873800] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:58:07,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:58:07,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103, 103] total 158 [2022-11-20 11:58:07,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223457821] [2022-11-20 11:58:07,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:58:07,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2022-11-20 11:58:07,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:58:07,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2022-11-20 11:58:07,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5620, Invalid=19186, Unknown=0, NotChecked=0, Total=24806 [2022-11-20 11:58:07,408 INFO L87 Difference]: Start difference. First operand 311 states and 314 transitions. Second operand has 158 states, 158 states have (on average 3.3354430379746836) internal successors, (527), 158 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:58:14,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:58:14,157 INFO L93 Difference]: Finished difference Result 925 states and 1032 transitions. [2022-11-20 11:58:14,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2022-11-20 11:58:14,158 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 3.3354430379746836) internal successors, (527), 158 states have internal predecessors, (527), 0 states have call successors, (0), 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 310 [2022-11-20 11:58:14,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:58:14,161 INFO L225 Difference]: With dead ends: 925 [2022-11-20 11:58:14,161 INFO L226 Difference]: Without dead ends: 519 [2022-11-20 11:58:14,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 468 SyntacticMatches, 97 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22455 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=16176, Invalid=50646, Unknown=0, NotChecked=0, Total=66822 [2022-11-20 11:58:14,167 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 938 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 1530 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 1378 SdHoareTripleChecker+Invalid, 1950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 1530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:58:14,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [938 Valid, 1378 Invalid, 1950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 1530 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 11:58:14,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-11-20 11:58:14,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 315. [2022-11-20 11:58:14,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.0127388535031847) internal successors, (318), 314 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:58:14,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 318 transitions. [2022-11-20 11:58:14,243 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 318 transitions. Word has length 310 [2022-11-20 11:58:14,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:58:14,243 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 318 transitions. [2022-11-20 11:58:14,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 3.3354430379746836) internal successors, (527), 158 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:58:14,243 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 318 transitions. [2022-11-20 11:58:14,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-11-20 11:58:14,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:58:14,245 INFO L195 NwaCegarLoop]: trace histogram [52, 51, 51, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:58:14,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-11-20 11:58:14,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-11-20 11:58:14,445 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:58:14,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:58:14,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1035533421, now seen corresponding path program 60 times [2022-11-20 11:58:14,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:58:14,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147962454] [2022-11-20 11:58:14,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:58:14,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:58:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:58:18,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7652 backedges. 2550 proven. 5102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:58:18,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:58:18,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147962454] [2022-11-20 11:58:18,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147962454] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:58:18,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255748437] [2022-11-20 11:58:18,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:58:18,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:58:18,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:58:18,417 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:58:18,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-20 11:58:18,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2022-11-20 11:58:18,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:58:18,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 1159 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-20 11:58:18,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:58:19,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7652 backedges. 2652 proven. 5000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:58:19,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:58:22,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7652 backedges. 2652 proven. 5000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:58:22,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255748437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:58:22,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:58:22,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 58 [2022-11-20 11:58:22,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301509811] [2022-11-20 11:58:22,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:58:22,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-20 11:58:22,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:58:22,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-20 11:58:22,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1494, Invalid=1812, Unknown=0, NotChecked=0, Total=3306 [2022-11-20 11:58:22,272 INFO L87 Difference]: Start difference. First operand 315 states and 318 transitions. Second operand has 58 states, 58 states have (on average 5.810344827586207) internal successors, (337), 58 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:58:23,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:58:23,877 INFO L93 Difference]: Finished difference Result 332 states and 336 transitions. [2022-11-20 11:58:23,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-11-20 11:58:23,878 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 5.810344827586207) internal successors, (337), 58 states have internal predecessors, (337), 0 states have call successors, (0), 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 314 [2022-11-20 11:58:23,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:58:23,880 INFO L225 Difference]: With dead ends: 332 [2022-11-20 11:58:23,880 INFO L226 Difference]: Without dead ends: 330 [2022-11-20 11:58:23,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 575 SyntacticMatches, 100 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5956 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4572, Invalid=7860, Unknown=0, NotChecked=0, Total=12432 [2022-11-20 11:58:23,882 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 593 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:58:23,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [593 Valid, 460 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:58:23,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-11-20 11:58:23,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 323. [2022-11-20 11:58:23,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.0124223602484472) internal successors, (326), 322 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:58:23,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 326 transitions. [2022-11-20 11:58:23,947 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 326 transitions. Word has length 314 [2022-11-20 11:58:23,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:58:23,948 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 326 transitions. [2022-11-20 11:58:23,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 5.810344827586207) internal successors, (337), 58 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:58:23,948 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 326 transitions. [2022-11-20 11:58:23,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2022-11-20 11:58:23,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:58:23,950 INFO L195 NwaCegarLoop]: trace histogram [53, 52, 52, 52, 52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:58:23,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-11-20 11:58:24,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-11-20 11:58:24,158 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:58:24,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:58:24,159 INFO L85 PathProgramCache]: Analyzing trace with hash 770478419, now seen corresponding path program 61 times [2022-11-20 11:58:24,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:58:24,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101877143] [2022-11-20 11:58:24,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:58:24,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:58:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:58:30,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8060 backedges. 5255 proven. 2805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:58:30,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:58:30,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101877143] [2022-11-20 11:58:30,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101877143] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:58:30,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953782147] [2022-11-20 11:58:30,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:58:30,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:58:30,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:58:30,959 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:58:30,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-20 11:58:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:58:31,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 1183 conjuncts, 106 conjunts are in the unsatisfiable core [2022-11-20 11:58:31,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:58:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8060 backedges. 5406 proven. 2652 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:58:37,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:58:41,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8060 backedges. 5406 proven. 2652 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:58:41,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953782147] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:58:41,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:58:41,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 106, 106] total 161 [2022-11-20 11:58:41,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573996990] [2022-11-20 11:58:41,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:58:41,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2022-11-20 11:58:41,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:58:41,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2022-11-20 11:58:41,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5781, Invalid=19979, Unknown=0, NotChecked=0, Total=25760 [2022-11-20 11:58:41,551 INFO L87 Difference]: Start difference. First operand 323 states and 326 transitions. Second operand has 161 states, 161 states have (on average 3.341614906832298) internal successors, (538), 161 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:58:46,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:58:46,071 INFO L93 Difference]: Finished difference Result 746 states and 854 transitions. [2022-11-20 11:58:46,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-11-20 11:58:46,072 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 3.341614906832298) internal successors, (538), 161 states have internal predecessors, (538), 0 states have call successors, (0), 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 322 [2022-11-20 11:58:46,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:58:46,075 INFO L225 Difference]: With dead ends: 746 [2022-11-20 11:58:46,075 INFO L226 Difference]: Without dead ends: 533 [2022-11-20 11:58:46,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 488 SyntacticMatches, 102 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16927 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=11295, Invalid=33861, Unknown=0, NotChecked=0, Total=45156 [2022-11-20 11:58:46,078 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 1025 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 1370 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 1370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:58:46,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1025 Valid, 1215 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 1370 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 11:58:46,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-11-20 11:58:46,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 325. [2022-11-20 11:58:46,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.0123456790123457) internal successors, (328), 324 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:58:46,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 328 transitions. [2022-11-20 11:58:46,139 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 328 transitions. Word has length 322 [2022-11-20 11:58:46,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:58:46,139 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 328 transitions. [2022-11-20 11:58:46,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 3.341614906832298) internal successors, (538), 161 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:58:46,140 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 328 transitions. [2022-11-20 11:58:46,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-11-20 11:58:46,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:58:46,142 INFO L195 NwaCegarLoop]: trace histogram [53, 53, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:58:46,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-11-20 11:58:46,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:58:46,342 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:58:46,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:58:46,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1497433272, now seen corresponding path program 62 times [2022-11-20 11:58:46,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:58:46,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981825145] [2022-11-20 11:58:46,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:58:46,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:58:46,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:58:53,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8164 backedges. 5255 proven. 2909 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:58:53,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:58:53,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981825145] [2022-11-20 11:58:53,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981825145] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:58:53,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360544557] [2022-11-20 11:58:53,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:58:53,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:58:53,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:58:53,381 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:58:53,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-20 11:58:53,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:58:53,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:58:53,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-20 11:58:53,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:58:59,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8164 backedges. 5408 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:58:59,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:59:03,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8164 backedges. 5408 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:59:03,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360544557] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:59:03,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:59:03,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108, 108] total 163 [2022-11-20 11:59:03,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138627680] [2022-11-20 11:59:03,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:59:03,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2022-11-20 11:59:03,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:59:03,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2022-11-20 11:59:03,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5943, Invalid=20463, Unknown=0, NotChecked=0, Total=26406 [2022-11-20 11:59:03,808 INFO L87 Difference]: Start difference. First operand 325 states and 328 transitions. Second operand has 163 states, 163 states have (on average 3.312883435582822) internal successors, (540), 163 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:59:08,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:59:08,099 INFO L93 Difference]: Finished difference Result 754 states and 864 transitions. [2022-11-20 11:59:08,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-11-20 11:59:08,099 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 3.312883435582822) internal successors, (540), 163 states have internal predecessors, (540), 0 states have call successors, (0), 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 324 [2022-11-20 11:59:08,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:59:08,101 INFO L225 Difference]: With dead ends: 754 [2022-11-20 11:59:08,101 INFO L226 Difference]: Without dead ends: 539 [2022-11-20 11:59:08,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 807 GetRequests, 489 SyntacticMatches, 104 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17360 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=11669, Invalid=34771, Unknown=0, NotChecked=0, Total=46440 [2022-11-20 11:59:08,104 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 881 mSDsluCounter, 1190 mSDsCounter, 0 mSdLazyCounter, 1447 mSolverCounterSat, 562 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 2009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 562 IncrementalHoareTripleChecker+Valid, 1447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:59:08,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [881 Valid, 1301 Invalid, 2009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [562 Valid, 1447 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 11:59:08,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-11-20 11:59:08,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 327. [2022-11-20 11:59:08,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 1.0122699386503067) internal successors, (330), 326 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:59:08,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 330 transitions. [2022-11-20 11:59:08,161 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 330 transitions. Word has length 324 [2022-11-20 11:59:08,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:59:08,161 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 330 transitions. [2022-11-20 11:59:08,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 163 states have (on average 3.312883435582822) internal successors, (540), 163 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:59:08,162 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 330 transitions. [2022-11-20 11:59:08,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-11-20 11:59:08,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:59:08,163 INFO L195 NwaCegarLoop]: trace histogram [54, 53, 53, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:59:08,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-11-20 11:59:08,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-11-20 11:59:08,367 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:59:08,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:59:08,367 INFO L85 PathProgramCache]: Analyzing trace with hash 21377757, now seen corresponding path program 63 times [2022-11-20 11:59:08,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:59:08,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994326742] [2022-11-20 11:59:08,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:59:08,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:59:08,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:59:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8270 backedges. 2756 proven. 5514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:59:12,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:59:12,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994326742] [2022-11-20 11:59:12,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994326742] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:59:12,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092808320] [2022-11-20 11:59:12,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:59:12,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:59:12,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:59:12,371 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:59:12,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-20 11:59:12,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2022-11-20 11:59:12,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:59:12,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 1203 conjuncts, 112 conjunts are in the unsatisfiable core [2022-11-20 11:59:12,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:59:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8270 backedges. 2862 proven. 5408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:59:13,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:59:16,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8270 backedges. 2862 proven. 5408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:59:16,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092808320] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:59:16,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:59:16,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 60 [2022-11-20 11:59:16,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462992724] [2022-11-20 11:59:16,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:59:16,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-20 11:59:16,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:59:16,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-20 11:59:16,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1605, Invalid=1935, Unknown=0, NotChecked=0, Total=3540 [2022-11-20 11:59:16,073 INFO L87 Difference]: Start difference. First operand 327 states and 330 transitions. Second operand has 60 states, 60 states have (on average 5.816666666666666) internal successors, (349), 60 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:59:17,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:59:17,691 INFO L93 Difference]: Finished difference Result 344 states and 348 transitions. [2022-11-20 11:59:17,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-11-20 11:59:17,691 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 5.816666666666666) internal successors, (349), 60 states have internal predecessors, (349), 0 states have call successors, (0), 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 326 [2022-11-20 11:59:17,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:59:17,692 INFO L225 Difference]: With dead ends: 344 [2022-11-20 11:59:17,692 INFO L226 Difference]: Without dead ends: 342 [2022-11-20 11:59:17,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 815 GetRequests, 597 SyntacticMatches, 104 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6402 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4909, Invalid=8431, Unknown=0, NotChecked=0, Total=13340 [2022-11-20 11:59:17,694 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 341 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:59:17,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 547 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:59:17,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-11-20 11:59:17,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 335. [2022-11-20 11:59:17,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 1.0119760479041917) internal successors, (338), 334 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:59:17,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 338 transitions. [2022-11-20 11:59:17,762 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 338 transitions. Word has length 326 [2022-11-20 11:59:17,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:59:17,762 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 338 transitions. [2022-11-20 11:59:17,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 5.816666666666666) internal successors, (349), 60 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:59:17,762 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 338 transitions. [2022-11-20 11:59:17,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-11-20 11:59:17,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:59:17,765 INFO L195 NwaCegarLoop]: trace histogram [55, 54, 54, 54, 54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:59:17,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-11-20 11:59:17,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-11-20 11:59:17,971 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:59:17,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:59:17,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1641306051, now seen corresponding path program 64 times [2022-11-20 11:59:17,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:59:17,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860353680] [2022-11-20 11:59:17,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:59:17,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:59:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:59:24,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8694 backedges. 5673 proven. 3021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:59:24,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:59:24,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860353680] [2022-11-20 11:59:24,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860353680] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:59:24,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063415533] [2022-11-20 11:59:24,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:59:24,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:59:24,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:59:24,527 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:59:24,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-20 11:59:24,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:59:24,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:59:24,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 1227 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-20 11:59:24,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:59:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8694 backedges. 5832 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:59:30,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:59:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8694 backedges. 5832 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:59:35,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063415533] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:59:35,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:59:35,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111, 111] total 170 [2022-11-20 11:59:35,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095551935] [2022-11-20 11:59:35,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:59:35,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2022-11-20 11:59:35,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:59:35,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2022-11-20 11:59:35,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6500, Invalid=22230, Unknown=0, NotChecked=0, Total=28730 [2022-11-20 11:59:35,026 INFO L87 Difference]: Start difference. First operand 335 states and 338 transitions. Second operand has 170 states, 170 states have (on average 3.335294117647059) internal successors, (567), 170 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:59:42,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:59:42,574 INFO L93 Difference]: Finished difference Result 997 states and 1112 transitions. [2022-11-20 11:59:42,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-11-20 11:59:42,574 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 3.335294117647059) internal successors, (567), 170 states have internal predecessors, (567), 0 states have call successors, (0), 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 334 [2022-11-20 11:59:42,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:59:42,576 INFO L225 Difference]: With dead ends: 997 [2022-11-20 11:59:42,576 INFO L226 Difference]: Without dead ends: 559 [2022-11-20 11:59:42,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 886 GetRequests, 504 SyntacticMatches, 105 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26089 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=18764, Invalid=58798, Unknown=0, NotChecked=0, Total=77562 [2022-11-20 11:59:42,580 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 979 mSDsluCounter, 1766 mSDsCounter, 0 mSdLazyCounter, 2031 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 1879 SdHoareTripleChecker+Invalid, 2364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 2031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:59:42,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [979 Valid, 1879 Invalid, 2364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 2031 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-20 11:59:42,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-11-20 11:59:42,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 339. [2022-11-20 11:59:42,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.0118343195266273) internal successors, (342), 338 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:59:42,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 342 transitions. [2022-11-20 11:59:42,640 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 342 transitions. Word has length 334 [2022-11-20 11:59:42,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:59:42,640 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 342 transitions. [2022-11-20 11:59:42,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 3.335294117647059) internal successors, (567), 170 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:59:42,640 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 342 transitions. [2022-11-20 11:59:42,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2022-11-20 11:59:42,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:59:42,643 INFO L195 NwaCegarLoop]: trace histogram [56, 55, 55, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:59:42,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-11-20 11:59:42,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:59:42,850 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:59:42,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:59:42,850 INFO L85 PathProgramCache]: Analyzing trace with hash -244975027, now seen corresponding path program 65 times [2022-11-20 11:59:42,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:59:42,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268809241] [2022-11-20 11:59:42,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:59:42,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:59:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:59:47,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8912 backedges. 2970 proven. 5942 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:59:47,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:59:47,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268809241] [2022-11-20 11:59:47,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268809241] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:59:47,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92964529] [2022-11-20 11:59:47,158 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:59:47,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:59:47,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:59:47,160 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:59:47,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-20 11:59:47,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 56 check-sat command(s) [2022-11-20 11:59:47,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:59:47,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 1247 conjuncts, 116 conjunts are in the unsatisfiable core [2022-11-20 11:59:47,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:59:48,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8912 backedges. 3080 proven. 5832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:59:48,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:59:51,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8912 backedges. 3080 proven. 5832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:59:51,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92964529] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:59:51,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:59:51,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 62 [2022-11-20 11:59:51,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657451430] [2022-11-20 11:59:51,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:59:51,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-20 11:59:51,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:59:51,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-20 11:59:51,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1720, Invalid=2062, Unknown=0, NotChecked=0, Total=3782 [2022-11-20 11:59:51,233 INFO L87 Difference]: Start difference. First operand 339 states and 342 transitions. Second operand has 62 states, 62 states have (on average 5.82258064516129) internal successors, (361), 62 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:59:52,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:59:52,965 INFO L93 Difference]: Finished difference Result 356 states and 360 transitions. [2022-11-20 11:59:52,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-11-20 11:59:52,965 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 5.82258064516129) internal successors, (361), 62 states have internal predecessors, (361), 0 states have call successors, (0), 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 338 [2022-11-20 11:59:52,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:59:52,966 INFO L225 Difference]: With dead ends: 356 [2022-11-20 11:59:52,967 INFO L226 Difference]: Without dead ends: 354 [2022-11-20 11:59:52,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 619 SyntacticMatches, 108 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6864 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5258, Invalid=9022, Unknown=0, NotChecked=0, Total=14280 [2022-11-20 11:59:52,968 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 639 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:59:52,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 465 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:59:52,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-11-20 11:59:53,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 347. [2022-11-20 11:59:53,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.0115606936416186) internal successors, (350), 346 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:59:53,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 350 transitions. [2022-11-20 11:59:53,025 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 350 transitions. Word has length 338 [2022-11-20 11:59:53,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:59:53,025 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 350 transitions. [2022-11-20 11:59:53,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 5.82258064516129) internal successors, (361), 62 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:59:53,026 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 350 transitions. [2022-11-20 11:59:53,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-11-20 11:59:53,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:59:53,027 INFO L195 NwaCegarLoop]: trace histogram [57, 56, 56, 56, 56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:59:53,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-11-20 11:59:53,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:59:53,231 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:59:53,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:59:53,231 INFO L85 PathProgramCache]: Analyzing trace with hash -751980749, now seen corresponding path program 66 times [2022-11-20 11:59:53,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:59:53,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589073894] [2022-11-20 11:59:53,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:59:53,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:59:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:00:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9352 backedges. 6107 proven. 3245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:00:00,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:00:00,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589073894] [2022-11-20 12:00:00,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589073894] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:00:00,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130095536] [2022-11-20 12:00:00,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 12:00:00,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:00:00,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:00:00,631 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:00:00,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-11-20 12:00:01,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2022-11-20 12:00:01,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:00:01,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 1271 conjuncts, 115 conjunts are in the unsatisfiable core [2022-11-20 12:00:01,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:00:07,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9352 backedges. 6272 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:00:07,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:00:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9352 backedges. 6272 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:00:12,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130095536] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:00:12,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:00:12,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115, 115] total 176 [2022-11-20 12:00:12,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081681204] [2022-11-20 12:00:12,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:00:12,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2022-11-20 12:00:12,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:00:12,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2022-11-20 12:00:12,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6964, Invalid=23836, Unknown=0, NotChecked=0, Total=30800 [2022-11-20 12:00:12,397 INFO L87 Difference]: Start difference. First operand 347 states and 350 transitions. Second operand has 176 states, 176 states have (on average 3.335227272727273) internal successors, (587), 176 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:00:20,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:00:20,159 INFO L93 Difference]: Finished difference Result 1033 states and 1152 transitions. [2022-11-20 12:00:20,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2022-11-20 12:00:20,159 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 3.335227272727273) internal successors, (587), 176 states have internal predecessors, (587), 0 states have call successors, (0), 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 346 [2022-11-20 12:00:20,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:00:20,161 INFO L225 Difference]: With dead ends: 1033 [2022-11-20 12:00:20,161 INFO L226 Difference]: Without dead ends: 579 [2022-11-20 12:00:20,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 918 GetRequests, 522 SyntacticMatches, 109 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28008 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=20130, Invalid=63102, Unknown=0, NotChecked=0, Total=83232 [2022-11-20 12:00:20,168 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 1022 mSDsluCounter, 1445 mSDsCounter, 0 mSdLazyCounter, 1726 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 1562 SdHoareTripleChecker+Invalid, 2303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 1726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:00:20,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1022 Valid, 1562 Invalid, 2303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 1726 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 12:00:20,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-11-20 12:00:20,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 351. [2022-11-20 12:00:20,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.0114285714285713) internal successors, (354), 350 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:00:20,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 354 transitions. [2022-11-20 12:00:20,228 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 354 transitions. Word has length 346 [2022-11-20 12:00:20,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:00:20,228 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 354 transitions. [2022-11-20 12:00:20,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 3.335227272727273) internal successors, (587), 176 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:00:20,229 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 354 transitions. [2022-11-20 12:00:20,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-11-20 12:00:20,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:00:20,230 INFO L195 NwaCegarLoop]: trace histogram [58, 57, 57, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:00:20,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-11-20 12:00:20,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-11-20 12:00:20,431 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:00:20,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:00:20,431 INFO L85 PathProgramCache]: Analyzing trace with hash 234738365, now seen corresponding path program 67 times [2022-11-20 12:00:20,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:00:20,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086610621] [2022-11-20 12:00:20,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:00:20,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:00:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:00:25,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9578 backedges. 3192 proven. 6386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:00:25,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:00:25,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086610621] [2022-11-20 12:00:25,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086610621] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:00:25,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19994921] [2022-11-20 12:00:25,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 12:00:25,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:00:25,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:00:25,071 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:00:25,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-11-20 12:00:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:00:25,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 1291 conjuncts, 120 conjunts are in the unsatisfiable core [2022-11-20 12:00:25,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:00:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9578 backedges. 3306 proven. 6272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:00:25,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:00:29,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9578 backedges. 3306 proven. 6272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:00:29,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19994921] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:00:29,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:00:29,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 64 [2022-11-20 12:00:29,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045703729] [2022-11-20 12:00:29,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:00:29,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-20 12:00:29,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:00:29,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-20 12:00:29,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1839, Invalid=2193, Unknown=0, NotChecked=0, Total=4032 [2022-11-20 12:00:29,068 INFO L87 Difference]: Start difference. First operand 351 states and 354 transitions. Second operand has 64 states, 64 states have (on average 5.828125) internal successors, (373), 64 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:00:30,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:00:30,840 INFO L93 Difference]: Finished difference Result 368 states and 372 transitions. [2022-11-20 12:00:30,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-11-20 12:00:30,841 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 5.828125) internal successors, (373), 64 states have internal predecessors, (373), 0 states have call successors, (0), 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 350 [2022-11-20 12:00:30,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:00:30,842 INFO L225 Difference]: With dead ends: 368 [2022-11-20 12:00:30,842 INFO L226 Difference]: Without dead ends: 366 [2022-11-20 12:00:30,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 875 GetRequests, 641 SyntacticMatches, 112 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7342 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=5619, Invalid=9633, Unknown=0, NotChecked=0, Total=15252 [2022-11-20 12:00:30,843 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 367 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:00:30,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 546 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:00:30,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-11-20 12:00:30,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 359. [2022-11-20 12:00:30,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.011173184357542) internal successors, (362), 358 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:00:30,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 362 transitions. [2022-11-20 12:00:30,920 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 362 transitions. Word has length 350 [2022-11-20 12:00:30,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:00:30,920 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 362 transitions. [2022-11-20 12:00:30,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 5.828125) internal successors, (373), 64 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:00:30,921 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 362 transitions. [2022-11-20 12:00:30,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2022-11-20 12:00:30,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:00:30,923 INFO L195 NwaCegarLoop]: trace histogram [59, 58, 58, 58, 58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:00:30,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-11-20 12:00:31,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-11-20 12:00:31,124 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:00:31,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:00:31,124 INFO L85 PathProgramCache]: Analyzing trace with hash 73275299, now seen corresponding path program 68 times [2022-11-20 12:00:31,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:00:31,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821211228] [2022-11-20 12:00:31,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:00:31,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:00:31,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:00:39,133 INFO L134 CoverageAnalysis]: Checked inductivity of 10034 backedges. 6557 proven. 3477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:00:39,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:00:39,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821211228] [2022-11-20 12:00:39,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821211228] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:00:39,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141516464] [2022-11-20 12:00:39,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:00:39,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:00:39,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:00:39,134 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:00:39,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-11-20 12:00:39,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:00:39,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:00:39,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 1315 conjuncts, 118 conjunts are in the unsatisfiable core [2022-11-20 12:00:39,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:00:45,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10034 backedges. 6726 proven. 3306 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:00:45,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:00:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 10034 backedges. 6726 proven. 3306 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:00:51,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141516464] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:00:51,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:00:51,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 118, 118] total 179 [2022-11-20 12:00:51,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670469699] [2022-11-20 12:00:51,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:00:51,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 179 states [2022-11-20 12:00:51,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:00:51,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2022-11-20 12:00:51,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7143, Invalid=24719, Unknown=0, NotChecked=0, Total=31862 [2022-11-20 12:00:51,045 INFO L87 Difference]: Start difference. First operand 359 states and 362 transitions. Second operand has 179 states, 179 states have (on average 3.340782122905028) internal successors, (598), 179 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:00:56,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:00:56,474 INFO L93 Difference]: Finished difference Result 830 states and 950 transitions. [2022-11-20 12:00:56,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-11-20 12:00:56,475 INFO L78 Accepts]: Start accepts. Automaton has has 179 states, 179 states have (on average 3.340782122905028) internal successors, (598), 179 states have internal predecessors, (598), 0 states have call successors, (0), 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 358 [2022-11-20 12:00:56,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:00:56,476 INFO L225 Difference]: With dead ends: 830 [2022-11-20 12:00:56,476 INFO L226 Difference]: Without dead ends: 593 [2022-11-20 12:00:56,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 891 GetRequests, 542 SyntacticMatches, 114 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20971 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=13989, Invalid=41943, Unknown=0, NotChecked=0, Total=55932 [2022-11-20 12:00:56,480 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 1163 mSDsluCounter, 1509 mSDsCounter, 0 mSdLazyCounter, 1802 mSolverCounterSat, 720 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 1630 SdHoareTripleChecker+Invalid, 2522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 720 IncrementalHoareTripleChecker+Valid, 1802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:00:56,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1163 Valid, 1630 Invalid, 2522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [720 Valid, 1802 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 12:00:56,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-11-20 12:00:56,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 361. [2022-11-20 12:00:56,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 1.011111111111111) internal successors, (364), 360 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:00:56,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 364 transitions. [2022-11-20 12:00:56,544 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 364 transitions. Word has length 358 [2022-11-20 12:00:56,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:00:56,544 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 364 transitions. [2022-11-20 12:00:56,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 179 states, 179 states have (on average 3.340782122905028) internal successors, (598), 179 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:00:56,545 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 364 transitions. [2022-11-20 12:00:56,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2022-11-20 12:00:56,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:00:56,546 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:00:56,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-11-20 12:00:56,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:00:56,747 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:00:56,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:00:56,747 INFO L85 PathProgramCache]: Analyzing trace with hash 988511368, now seen corresponding path program 69 times [2022-11-20 12:00:56,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:00:56,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066798351] [2022-11-20 12:00:56,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:00:56,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:00:56,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10150 backedges. 6557 proven. 3593 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:01:04,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:01:04,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066798351] [2022-11-20 12:01:04,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066798351] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:01:04,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460177018] [2022-11-20 12:01:04,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:01:04,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:01:04,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:01:04,779 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:01:04,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-11-20 12:01:05,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2022-11-20 12:01:05,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:01:05,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 1325 conjuncts, 120 conjunts are in the unsatisfiable core [2022-11-20 12:01:05,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:01:12,149 INFO L134 CoverageAnalysis]: Checked inductivity of 10150 backedges. 6728 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:01:12,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:01:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 10150 backedges. 6728 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:01:17,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460177018] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:01:17,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:01:17,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120, 120] total 181 [2022-11-20 12:01:17,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766045552] [2022-11-20 12:01:17,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:01:17,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 181 states [2022-11-20 12:01:17,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:01:17,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 181 interpolants. [2022-11-20 12:01:17,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7323, Invalid=25257, Unknown=0, NotChecked=0, Total=32580 [2022-11-20 12:01:17,391 INFO L87 Difference]: Start difference. First operand 361 states and 364 transitions. Second operand has 181 states, 181 states have (on average 3.314917127071823) internal successors, (600), 181 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:01:22,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:01:22,809 INFO L93 Difference]: Finished difference Result 838 states and 960 transitions. [2022-11-20 12:01:22,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-11-20 12:01:22,810 INFO L78 Accepts]: Start accepts. Automaton has has 181 states, 181 states have (on average 3.314917127071823) internal successors, (600), 181 states have internal predecessors, (600), 0 states have call successors, (0), 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 360 [2022-11-20 12:01:22,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:01:22,811 INFO L225 Difference]: With dead ends: 838 [2022-11-20 12:01:22,811 INFO L226 Difference]: Without dead ends: 599 [2022-11-20 12:01:22,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 897 GetRequests, 543 SyntacticMatches, 116 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21452 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=14405, Invalid=42955, Unknown=0, NotChecked=0, Total=57360 [2022-11-20 12:01:22,815 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 1131 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 1758 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1131 SdHoareTripleChecker+Valid, 1592 SdHoareTripleChecker+Invalid, 2121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 1758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:01:22,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1131 Valid, 1592 Invalid, 2121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 1758 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 12:01:22,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-11-20 12:01:22,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 363. [2022-11-20 12:01:22,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 1.011049723756906) internal successors, (366), 362 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:01:22,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 366 transitions. [2022-11-20 12:01:22,882 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 366 transitions. Word has length 360 [2022-11-20 12:01:22,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:01:22,882 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 366 transitions. [2022-11-20 12:01:22,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 181 states, 181 states have (on average 3.314917127071823) internal successors, (600), 181 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:01:22,883 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 366 transitions. [2022-11-20 12:01:22,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2022-11-20 12:01:22,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:01:22,885 INFO L195 NwaCegarLoop]: trace histogram [60, 59, 59, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:01:22,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-11-20 12:01:23,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2022-11-20 12:01:23,085 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:01:23,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:01:23,086 INFO L85 PathProgramCache]: Analyzing trace with hash 62077997, now seen corresponding path program 70 times [2022-11-20 12:01:23,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:01:23,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949206437] [2022-11-20 12:01:23,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:01:23,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:01:23,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:28,012 INFO L134 CoverageAnalysis]: Checked inductivity of 10268 backedges. 3422 proven. 6846 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:01:28,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:01:28,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949206437] [2022-11-20 12:01:28,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949206437] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:01:28,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749766633] [2022-11-20 12:01:28,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:01:28,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:01:28,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:01:28,014 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:01:28,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-11-20 12:01:28,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:01:28,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:01:28,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 1335 conjuncts, 124 conjunts are in the unsatisfiable core [2022-11-20 12:01:28,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:01:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 10268 backedges. 3540 proven. 6728 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:01:28,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:01:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10268 backedges. 3540 proven. 6728 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:01:32,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749766633] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:01:32,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:01:32,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 66 [2022-11-20 12:01:32,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663605917] [2022-11-20 12:01:32,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:01:32,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 12:01:32,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:01:32,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 12:01:32,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1962, Invalid=2328, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 12:01:32,324 INFO L87 Difference]: Start difference. First operand 363 states and 366 transitions. Second operand has 66 states, 66 states have (on average 5.833333333333333) internal successors, (385), 66 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:01:34,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:01:34,233 INFO L93 Difference]: Finished difference Result 380 states and 384 transitions. [2022-11-20 12:01:34,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-11-20 12:01:34,234 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 5.833333333333333) internal successors, (385), 66 states have internal predecessors, (385), 0 states have call successors, (0), 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 362 [2022-11-20 12:01:34,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:01:34,235 INFO L225 Difference]: With dead ends: 380 [2022-11-20 12:01:34,235 INFO L226 Difference]: Without dead ends: 378 [2022-11-20 12:01:34,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 905 GetRequests, 663 SyntacticMatches, 116 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7836 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=5992, Invalid=10264, Unknown=0, NotChecked=0, Total=16256 [2022-11-20 12:01:34,236 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 681 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:01:34,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 552 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:01:34,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-11-20 12:01:34,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 371. [2022-11-20 12:01:34,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.0108108108108107) internal successors, (374), 370 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:01:34,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 374 transitions. [2022-11-20 12:01:34,304 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 374 transitions. Word has length 362 [2022-11-20 12:01:34,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:01:34,304 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 374 transitions. [2022-11-20 12:01:34,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 5.833333333333333) internal successors, (385), 66 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:01:34,305 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 374 transitions. [2022-11-20 12:01:34,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2022-11-20 12:01:34,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:01:34,307 INFO L195 NwaCegarLoop]: trace histogram [61, 60, 60, 60, 60, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:01:34,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-11-20 12:01:34,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:01:34,508 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:01:34,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:01:34,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1686835475, now seen corresponding path program 71 times [2022-11-20 12:01:34,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:01:34,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081409060] [2022-11-20 12:01:34,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:01:34,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:01:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:43,092 INFO L134 CoverageAnalysis]: Checked inductivity of 10740 backedges. 7023 proven. 3717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:01:43,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:01:43,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081409060] [2022-11-20 12:01:43,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081409060] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:01:43,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216220448] [2022-11-20 12:01:43,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:01:43,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:01:43,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:01:43,093 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:01:43,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-20 12:01:43,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2022-11-20 12:01:43,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:01:43,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 1359 conjuncts, 123 conjunts are in the unsatisfiable core [2022-11-20 12:01:43,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:01:50,892 INFO L134 CoverageAnalysis]: Checked inductivity of 10740 backedges. 7200 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:01:50,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:01:56,138 INFO L134 CoverageAnalysis]: Checked inductivity of 10740 backedges. 7200 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:01:56,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216220448] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:01:56,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:01:56,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123, 123] total 188 [2022-11-20 12:01:56,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988622233] [2022-11-20 12:01:56,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:01:56,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2022-11-20 12:01:56,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:01:56,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2022-11-20 12:01:56,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7940, Invalid=27216, Unknown=0, NotChecked=0, Total=35156 [2022-11-20 12:01:56,142 INFO L87 Difference]: Start difference. First operand 371 states and 374 transitions. Second operand has 188 states, 188 states have (on average 3.3351063829787235) internal successors, (627), 188 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:02:05,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:02:05,067 INFO L93 Difference]: Finished difference Result 1105 states and 1232 transitions. [2022-11-20 12:02:05,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2022-11-20 12:02:05,067 INFO L78 Accepts]: Start accepts. Automaton has has 188 states, 188 states have (on average 3.3351063829787235) internal successors, (627), 188 states have internal predecessors, (627), 0 states have call successors, (0), 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 370 [2022-11-20 12:02:05,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:02:05,069 INFO L225 Difference]: With dead ends: 1105 [2022-11-20 12:02:05,069 INFO L226 Difference]: Without dead ends: 619 [2022-11-20 12:02:05,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 982 GetRequests, 558 SyntacticMatches, 117 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32050 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=23006, Invalid=72166, Unknown=0, NotChecked=0, Total=95172 [2022-11-20 12:02:05,074 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 1299 mSDsluCounter, 1989 mSDsCounter, 0 mSdLazyCounter, 2278 mSolverCounterSat, 606 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1299 SdHoareTripleChecker+Valid, 2114 SdHoareTripleChecker+Invalid, 2884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 606 IncrementalHoareTripleChecker+Valid, 2278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:02:05,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1299 Valid, 2114 Invalid, 2884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [606 Valid, 2278 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-20 12:02:05,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-11-20 12:02:05,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 375. [2022-11-20 12:02:05,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 1.0106951871657754) internal successors, (378), 374 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:02:05,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 378 transitions. [2022-11-20 12:02:05,140 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 378 transitions. Word has length 370 [2022-11-20 12:02:05,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:02:05,140 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 378 transitions. [2022-11-20 12:02:05,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 188 states, 188 states have (on average 3.3351063829787235) internal successors, (627), 188 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:02:05,141 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 378 transitions. [2022-11-20 12:02:05,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-11-20 12:02:05,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:02:05,142 INFO L195 NwaCegarLoop]: trace histogram [62, 61, 61, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:02:05,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-11-20 12:02:05,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:02:05,343 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:02:05,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:02:05,343 INFO L85 PathProgramCache]: Analyzing trace with hash 199997085, now seen corresponding path program 72 times [2022-11-20 12:02:05,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:02:05,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844520278] [2022-11-20 12:02:05,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:02:05,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:02:05,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:10,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10982 backedges. 3660 proven. 7322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:02:10,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:02:10,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844520278] [2022-11-20 12:02:10,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844520278] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:02:10,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021061070] [2022-11-20 12:02:10,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 12:02:10,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:02:10,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:02:10,403 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:02:10,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-20 12:02:10,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2022-11-20 12:02:10,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:02:10,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 128 conjunts are in the unsatisfiable core [2022-11-20 12:02:10,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:02:11,420 INFO L134 CoverageAnalysis]: Checked inductivity of 10982 backedges. 3782 proven. 7200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:02:11,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:02:14,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10982 backedges. 3782 proven. 7200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:02:14,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021061070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:02:14,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:02:14,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 68 [2022-11-20 12:02:14,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726742518] [2022-11-20 12:02:14,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:02:14,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-20 12:02:14,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:02:14,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-20 12:02:14,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2089, Invalid=2467, Unknown=0, NotChecked=0, Total=4556 [2022-11-20 12:02:14,927 INFO L87 Difference]: Start difference. First operand 375 states and 378 transitions. Second operand has 68 states, 68 states have (on average 5.838235294117647) internal successors, (397), 68 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:02:16,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:02:16,797 INFO L93 Difference]: Finished difference Result 392 states and 396 transitions. [2022-11-20 12:02:16,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-11-20 12:02:16,797 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 5.838235294117647) internal successors, (397), 68 states have internal predecessors, (397), 0 states have call successors, (0), 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 374 [2022-11-20 12:02:16,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:02:16,799 INFO L225 Difference]: With dead ends: 392 [2022-11-20 12:02:16,799 INFO L226 Difference]: Without dead ends: 390 [2022-11-20 12:02:16,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 935 GetRequests, 685 SyntacticMatches, 120 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8346 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=6377, Invalid=10915, Unknown=0, NotChecked=0, Total=17292 [2022-11-20 12:02:16,800 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 705 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:02:16,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [705 Valid, 503 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:02:16,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-11-20 12:02:16,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 383. [2022-11-20 12:02:16,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 1.0104712041884816) internal successors, (386), 382 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:02:16,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 386 transitions. [2022-11-20 12:02:16,867 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 386 transitions. Word has length 374 [2022-11-20 12:02:16,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:02:16,867 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 386 transitions. [2022-11-20 12:02:16,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 5.838235294117647) internal successors, (397), 68 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:02:16,868 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 386 transitions. [2022-11-20 12:02:16,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2022-11-20 12:02:16,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:02:16,869 INFO L195 NwaCegarLoop]: trace histogram [63, 62, 62, 62, 62, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:02:16,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-11-20 12:02:17,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:02:17,070 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:02:17,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:02:17,070 INFO L85 PathProgramCache]: Analyzing trace with hash 798628739, now seen corresponding path program 73 times [2022-11-20 12:02:17,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:02:17,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094623900] [2022-11-20 12:02:17,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:02:17,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:02:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:25,781 INFO L134 CoverageAnalysis]: Checked inductivity of 11470 backedges. 7505 proven. 3965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:02:25,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:02:25,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094623900] [2022-11-20 12:02:25,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094623900] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:02:25,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552635878] [2022-11-20 12:02:25,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 12:02:25,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:02:25,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:02:25,782 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:02:25,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-11-20 12:02:26,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:26,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 1403 conjuncts, 126 conjunts are in the unsatisfiable core [2022-11-20 12:02:26,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:02:33,239 INFO L134 CoverageAnalysis]: Checked inductivity of 11470 backedges. 7686 proven. 3782 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:02:33,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:02:38,639 INFO L134 CoverageAnalysis]: Checked inductivity of 11470 backedges. 7686 proven. 3782 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:02:38,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552635878] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:02:38,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:02:38,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 126, 126] total 191 [2022-11-20 12:02:38,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728801367] [2022-11-20 12:02:38,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:02:38,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 191 states [2022-11-20 12:02:38,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:02:38,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2022-11-20 12:02:38,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8131, Invalid=28159, Unknown=0, NotChecked=0, Total=36290 [2022-11-20 12:02:38,645 INFO L87 Difference]: Start difference. First operand 383 states and 386 transitions. Second operand has 191 states, 191 states have (on average 3.3403141361256545) internal successors, (638), 191 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:02:44,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:02:44,368 INFO L93 Difference]: Finished difference Result 886 states and 1014 transitions. [2022-11-20 12:02:44,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-11-20 12:02:44,368 INFO L78 Accepts]: Start accepts. Automaton has has 191 states, 191 states have (on average 3.3403141361256545) internal successors, (638), 191 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 382 [2022-11-20 12:02:44,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:02:44,370 INFO L225 Difference]: With dead ends: 886 [2022-11-20 12:02:44,371 INFO L226 Difference]: Without dead ends: 633 [2022-11-20 12:02:44,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 951 GetRequests, 578 SyntacticMatches, 122 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23907 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=15945, Invalid=47811, Unknown=0, NotChecked=0, Total=63756 [2022-11-20 12:02:44,374 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 1269 mSDsluCounter, 1348 mSDsCounter, 0 mSdLazyCounter, 1650 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1269 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 2302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 1650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:02:44,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1269 Valid, 1477 Invalid, 2302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 1650 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 12:02:44,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-11-20 12:02:44,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 385. [2022-11-20 12:02:44,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.0104166666666667) internal successors, (388), 384 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:02:44,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 388 transitions. [2022-11-20 12:02:44,440 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 388 transitions. Word has length 382 [2022-11-20 12:02:44,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:02:44,440 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 388 transitions. [2022-11-20 12:02:44,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 191 states, 191 states have (on average 3.3403141361256545) internal successors, (638), 191 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:02:44,440 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 388 transitions. [2022-11-20 12:02:44,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2022-11-20 12:02:44,442 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:02:44,442 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:02:44,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-11-20 12:02:44,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:02:44,642 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:02:44,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:02:44,643 INFO L85 PathProgramCache]: Analyzing trace with hash -328179352, now seen corresponding path program 74 times [2022-11-20 12:02:44,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:02:44,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404868257] [2022-11-20 12:02:44,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:02:44,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:02:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:53,923 INFO L134 CoverageAnalysis]: Checked inductivity of 11594 backedges. 7505 proven. 4089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:02:53,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:02:53,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404868257] [2022-11-20 12:02:53,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404868257] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:02:53,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486607487] [2022-11-20 12:02:53,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:02:53,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:02:53,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:02:53,925 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:02:53,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-11-20 12:02:54,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:02:54,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:02:54,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 1413 conjuncts, 128 conjunts are in the unsatisfiable core [2022-11-20 12:02:54,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:03:01,630 INFO L134 CoverageAnalysis]: Checked inductivity of 11594 backedges. 7688 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:03:01,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:03:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11594 backedges. 7688 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:03:07,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486607487] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:03:07,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:03:07,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128, 128] total 193 [2022-11-20 12:03:07,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510379692] [2022-11-20 12:03:07,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:03:07,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-11-20 12:03:07,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:03:07,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-11-20 12:03:07,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8323, Invalid=28733, Unknown=0, NotChecked=0, Total=37056 [2022-11-20 12:03:07,295 INFO L87 Difference]: Start difference. First operand 385 states and 388 transitions. Second operand has 193 states, 193 states have (on average 3.316062176165803) internal successors, (640), 193 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:03:13,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:03:13,433 INFO L93 Difference]: Finished difference Result 894 states and 1024 transitions. [2022-11-20 12:03:13,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-11-20 12:03:13,433 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 3.316062176165803) internal successors, (640), 193 states have internal predecessors, (640), 0 states have call successors, (0), 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 384 [2022-11-20 12:03:13,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:03:13,434 INFO L225 Difference]: With dead ends: 894 [2022-11-20 12:03:13,434 INFO L226 Difference]: Without dead ends: 639 [2022-11-20 12:03:13,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 579 SyntacticMatches, 124 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24420 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=16389, Invalid=48891, Unknown=0, NotChecked=0, Total=65280 [2022-11-20 12:03:13,438 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 1047 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 1922 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1047 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 2460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 1922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:03:13,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1047 Valid, 1748 Invalid, 2460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 1922 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 12:03:13,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-11-20 12:03:13,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 387. [2022-11-20 12:03:13,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.0103626943005182) internal successors, (390), 386 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:03:13,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 390 transitions. [2022-11-20 12:03:13,508 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 390 transitions. Word has length 384 [2022-11-20 12:03:13,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:03:13,509 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 390 transitions. [2022-11-20 12:03:13,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 3.316062176165803) internal successors, (640), 193 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:03:13,509 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 390 transitions. [2022-11-20 12:03:13,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-11-20 12:03:13,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:03:13,511 INFO L195 NwaCegarLoop]: trace histogram [64, 63, 63, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:03:13,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-11-20 12:03:13,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:03:13,711 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:03:13,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:03:13,711 INFO L85 PathProgramCache]: Analyzing trace with hash -858996211, now seen corresponding path program 75 times [2022-11-20 12:03:13,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:03:13,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901503127] [2022-11-20 12:03:13,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:03:13,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:03:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:03:19,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11720 backedges. 3906 proven. 7814 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:03:19,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:03:19,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901503127] [2022-11-20 12:03:19,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901503127] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:03:19,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457520631] [2022-11-20 12:03:19,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:03:19,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:03:19,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:03:19,231 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:03:19,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-20 12:03:19,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2022-11-20 12:03:19,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:03:19,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 1423 conjuncts, 132 conjunts are in the unsatisfiable core [2022-11-20 12:03:19,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:03:20,285 INFO L134 CoverageAnalysis]: Checked inductivity of 11720 backedges. 4032 proven. 7688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:03:20,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:03:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 11720 backedges. 4032 proven. 7688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:03:23,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457520631] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:03:23,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:03:23,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 70 [2022-11-20 12:03:23,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161526] [2022-11-20 12:03:23,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:03:23,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-20 12:03:23,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:03:23,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-20 12:03:23,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2220, Invalid=2610, Unknown=0, NotChecked=0, Total=4830 [2022-11-20 12:03:23,939 INFO L87 Difference]: Start difference. First operand 387 states and 390 transitions. Second operand has 70 states, 70 states have (on average 5.8428571428571425) internal successors, (409), 70 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:03:25,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:03:25,910 INFO L93 Difference]: Finished difference Result 404 states and 408 transitions. [2022-11-20 12:03:25,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-11-20 12:03:25,911 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 5.8428571428571425) internal successors, (409), 70 states have internal predecessors, (409), 0 states have call successors, (0), 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 386 [2022-11-20 12:03:25,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:03:25,912 INFO L225 Difference]: With dead ends: 404 [2022-11-20 12:03:25,912 INFO L226 Difference]: Without dead ends: 402 [2022-11-20 12:03:25,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 965 GetRequests, 707 SyntacticMatches, 124 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8872 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=6774, Invalid=11586, Unknown=0, NotChecked=0, Total=18360 [2022-11-20 12:03:25,914 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 405 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:03:25,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 648 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:03:25,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-11-20 12:03:25,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 395. [2022-11-20 12:03:25,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 1.0101522842639594) internal successors, (398), 394 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:03:25,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 398 transitions. [2022-11-20 12:03:25,992 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 398 transitions. Word has length 386 [2022-11-20 12:03:25,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:03:25,992 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 398 transitions. [2022-11-20 12:03:25,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 5.8428571428571425) internal successors, (409), 70 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:03:25,993 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 398 transitions. [2022-11-20 12:03:25,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2022-11-20 12:03:25,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:03:25,994 INFO L195 NwaCegarLoop]: trace histogram [65, 64, 64, 64, 64, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:03:26,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-11-20 12:03:26,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-11-20 12:03:26,195 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:03:26,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:03:26,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1311815411, now seen corresponding path program 76 times [2022-11-20 12:03:26,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:03:26,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806980273] [2022-11-20 12:03:26,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:03:26,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:03:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:03:35,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12224 backedges. 8003 proven. 4221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:03:35,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:03:35,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806980273] [2022-11-20 12:03:35,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806980273] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:03:35,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597515886] [2022-11-20 12:03:35,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:03:35,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:03:35,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:03:35,908 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:03:35,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-11-20 12:03:36,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:03:36,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:03:36,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 1447 conjuncts, 131 conjunts are in the unsatisfiable core [2022-11-20 12:03:36,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:03:44,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12224 backedges. 8192 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:03:44,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:03:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12224 backedges. 8192 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:03:50,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597515886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:03:50,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:03:50,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131, 131] total 200 [2022-11-20 12:03:50,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155889004] [2022-11-20 12:03:50,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:03:50,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 200 states [2022-11-20 12:03:50,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:03:50,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2022-11-20 12:03:50,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8980, Invalid=30820, Unknown=0, NotChecked=0, Total=39800 [2022-11-20 12:03:50,272 INFO L87 Difference]: Start difference. First operand 395 states and 398 transitions. Second operand has 200 states, 200 states have (on average 3.335) internal successors, (667), 200 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:04:00,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:04:00,949 INFO L93 Difference]: Finished difference Result 1177 states and 1312 transitions. [2022-11-20 12:04:00,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2022-11-20 12:04:00,950 INFO L78 Accepts]: Start accepts. Automaton has has 200 states, 200 states have (on average 3.335) internal successors, (667), 200 states have internal predecessors, (667), 0 states have call successors, (0), 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 394 [2022-11-20 12:04:00,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:04:00,951 INFO L225 Difference]: With dead ends: 1177 [2022-11-20 12:04:00,951 INFO L226 Difference]: Without dead ends: 659 [2022-11-20 12:04:00,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1046 GetRequests, 594 SyntacticMatches, 125 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36364 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=26074, Invalid=81838, Unknown=0, NotChecked=0, Total=107912 [2022-11-20 12:04:00,958 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 1407 mSDsluCounter, 2295 mSDsCounter, 0 mSdLazyCounter, 2624 mSolverCounterSat, 785 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1407 SdHoareTripleChecker+Valid, 2428 SdHoareTripleChecker+Invalid, 3409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 785 IncrementalHoareTripleChecker+Valid, 2624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:04:00,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1407 Valid, 2428 Invalid, 3409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [785 Valid, 2624 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-20 12:04:00,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-11-20 12:04:01,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 399. [2022-11-20 12:04:01,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 1.0100502512562815) internal successors, (402), 398 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:04:01,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 402 transitions. [2022-11-20 12:04:01,068 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 402 transitions. Word has length 394 [2022-11-20 12:04:01,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:04:01,068 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 402 transitions. [2022-11-20 12:04:01,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 200 states, 200 states have (on average 3.335) internal successors, (667), 200 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:04:01,069 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 402 transitions. [2022-11-20 12:04:01,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2022-11-20 12:04:01,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:04:01,071 INFO L195 NwaCegarLoop]: trace histogram [66, 65, 65, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:04:01,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-11-20 12:04:01,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-11-20 12:04:01,271 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:04:01,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:04:01,272 INFO L85 PathProgramCache]: Analyzing trace with hash 960224893, now seen corresponding path program 77 times [2022-11-20 12:04:01,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:04:01,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459911480] [2022-11-20 12:04:01,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:04:01,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:04:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:04:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12482 backedges. 4160 proven. 8322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:04:07,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:04:07,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459911480] [2022-11-20 12:04:07,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459911480] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:04:07,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669746021] [2022-11-20 12:04:07,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:04:07,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:04:07,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:04:07,857 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:04:07,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-11-20 12:04:08,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2022-11-20 12:04:08,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:04:08,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 1467 conjuncts, 136 conjunts are in the unsatisfiable core [2022-11-20 12:04:08,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:04:08,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12482 backedges. 4290 proven. 8192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:04:08,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:04:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12482 backedges. 4290 proven. 8192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:04:12,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669746021] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:04:12,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:04:12,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 72 [2022-11-20 12:04:12,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741850278] [2022-11-20 12:04:12,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:04:12,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-20 12:04:12,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:04:12,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-20 12:04:12,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2355, Invalid=2757, Unknown=0, NotChecked=0, Total=5112 [2022-11-20 12:04:12,927 INFO L87 Difference]: Start difference. First operand 399 states and 402 transitions. Second operand has 72 states, 72 states have (on average 5.847222222222222) internal successors, (421), 72 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:04:15,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:04:15,129 INFO L93 Difference]: Finished difference Result 416 states and 420 transitions. [2022-11-20 12:04:15,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-11-20 12:04:15,129 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 5.847222222222222) internal successors, (421), 72 states have internal predecessors, (421), 0 states have call successors, (0), 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 398 [2022-11-20 12:04:15,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:04:15,132 INFO L225 Difference]: With dead ends: 416 [2022-11-20 12:04:15,132 INFO L226 Difference]: Without dead ends: 414 [2022-11-20 12:04:15,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 995 GetRequests, 729 SyntacticMatches, 128 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9414 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=7183, Invalid=12277, Unknown=0, NotChecked=0, Total=19460 [2022-11-20 12:04:15,134 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 413 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:04:15,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 686 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 12:04:15,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-11-20 12:04:15,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 407. [2022-11-20 12:04:15,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.0098522167487685) internal successors, (410), 406 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:04:15,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 410 transitions. [2022-11-20 12:04:15,210 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 410 transitions. Word has length 398 [2022-11-20 12:04:15,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:04:15,210 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 410 transitions. [2022-11-20 12:04:15,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 5.847222222222222) internal successors, (421), 72 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:04:15,210 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 410 transitions. [2022-11-20 12:04:15,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2022-11-20 12:04:15,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:04:15,212 INFO L195 NwaCegarLoop]: trace histogram [67, 66, 66, 66, 66, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:04:15,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-11-20 12:04:15,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-11-20 12:04:15,413 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:04:15,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:04:15,413 INFO L85 PathProgramCache]: Analyzing trace with hash 901014371, now seen corresponding path program 78 times [2022-11-20 12:04:15,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:04:15,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264240802] [2022-11-20 12:04:15,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:04:15,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:04:15,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:04:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 13002 backedges. 8517 proven. 4485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:04:25,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:04:25,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264240802] [2022-11-20 12:04:25,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264240802] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:04:25,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734821747] [2022-11-20 12:04:25,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 12:04:25,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:04:25,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:04:25,643 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:04:25,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e50a318-a2d1-4b06-80fa-b88574b0eb10/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-11-20 12:04:26,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2022-11-20 12:04:26,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:04:26,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 1491 conjuncts, 135 conjunts are in the unsatisfiable core [2022-11-20 12:04:26,237 INFO L286 TraceCheckSpWp]: Computing forward predicates...