./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/rewnifrev.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/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_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/rewnifrev.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/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_846ab8f4-b6fb-476e-94ff-68f755574d98/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 62ffb246c1e6cc2a3d3d5a08bb5a65a9894a173aba5be4caac9150f1d27ccfed --- 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 10:30:12,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:30:12,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:30:12,306 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:30:12,307 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:30:12,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:30:12,309 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:30:12,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:30:12,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:30:12,314 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:30:12,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:30:12,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:30:12,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:30:12,319 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:30:12,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:30:12,321 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:30:12,322 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:30:12,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:30:12,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:30:12,328 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:30:12,329 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:30:12,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:30:12,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:30:12,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:30:12,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:30:12,349 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:30:12,349 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:30:12,351 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:30:12,351 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:30:12,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:30:12,353 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:30:12,355 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:30:12,356 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:30:12,358 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:30:12,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:30:12,361 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:30:12,363 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:30:12,363 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:30:12,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:30:12,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:30:12,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:30:12,368 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:30:12,409 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:30:12,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:30:12,410 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:30:12,410 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:30:12,411 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:30:12,412 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:30:12,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:30:12,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:30:12,413 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:30:12,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:30:12,415 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:30:12,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:30:12,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:30:12,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:30:12,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:30:12,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:30:12,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:30:12,416 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:30:12,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:30:12,417 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:30:12,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:30:12,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:30:12,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:30:12,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:30:12,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:30:12,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:30:12,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:30:12,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:30:12,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:30:12,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:30:12,419 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:30:12,420 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:30:12,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:30:12,420 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_846ab8f4-b6fb-476e-94ff-68f755574d98/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62ffb246c1e6cc2a3d3d5a08bb5a65a9894a173aba5be4caac9150f1d27ccfed [2022-11-20 10:30:12,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:30:12,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:30:12,745 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:30:12,746 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:30:12,747 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:30:12,748 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/array-tiling/rewnifrev.c [2022-11-20 10:30:15,889 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:30:16,162 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:30:16,163 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/sv-benchmarks/c/array-tiling/rewnifrev.c [2022-11-20 10:30:16,170 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/data/049d4adf8/b3121e3477574597993229137c06817b/FLAG1d3dc4268 [2022-11-20 10:30:16,185 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/data/049d4adf8/b3121e3477574597993229137c06817b [2022-11-20 10:30:16,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:30:16,190 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:30:16,191 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:30:16,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:30:16,196 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:30:16,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:30:16" (1/1) ... [2022-11-20 10:30:16,198 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68105d5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:16, skipping insertion in model container [2022-11-20 10:30:16,198 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:30:16" (1/1) ... [2022-11-20 10:30:16,207 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:30:16,227 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:30:16,364 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_846ab8f4-b6fb-476e-94ff-68f755574d98/sv-benchmarks/c/array-tiling/rewnifrev.c[400,413] [2022-11-20 10:30:16,380 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:30:16,390 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:30:16,402 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_846ab8f4-b6fb-476e-94ff-68f755574d98/sv-benchmarks/c/array-tiling/rewnifrev.c[400,413] [2022-11-20 10:30:16,407 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:30:16,421 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:30:16,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:16 WrapperNode [2022-11-20 10:30:16,422 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:30:16,423 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:30:16,423 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:30:16,423 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:30:16,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:16" (1/1) ... [2022-11-20 10:30:16,437 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:16" (1/1) ... [2022-11-20 10:30:16,460 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2022-11-20 10:30:16,460 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:30:16,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:30:16,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:30:16,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:30:16,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:16" (1/1) ... [2022-11-20 10:30:16,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:16" (1/1) ... [2022-11-20 10:30:16,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:16" (1/1) ... [2022-11-20 10:30:16,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:16" (1/1) ... [2022-11-20 10:30:16,476 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:16" (1/1) ... [2022-11-20 10:30:16,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:16" (1/1) ... [2022-11-20 10:30:16,481 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:16" (1/1) ... [2022-11-20 10:30:16,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:16" (1/1) ... [2022-11-20 10:30:16,484 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:30:16,487 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:30:16,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:30:16,499 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:30:16,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:16" (1/1) ... [2022-11-20 10:30:16,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:30:16,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:16,530 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:30:16,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:30:16,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:30:16,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:30:16,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:30:16,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 10:30:16,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:30:16,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:30:16,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:30:16,657 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:30:16,659 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:30:16,865 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:30:16,871 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:30:16,871 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 10:30:16,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:30:16 BoogieIcfgContainer [2022-11-20 10:30:16,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:30:16,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:30:16,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:30:16,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:30:16,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:30:16" (1/3) ... [2022-11-20 10:30:16,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@400b9995 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:30:16, skipping insertion in model container [2022-11-20 10:30:16,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:16" (2/3) ... [2022-11-20 10:30:16,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@400b9995 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:30:16, skipping insertion in model container [2022-11-20 10:30:16,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:30:16" (3/3) ... [2022-11-20 10:30:16,912 INFO L112 eAbstractionObserver]: Analyzing ICFG rewnifrev.c [2022-11-20 10:30:16,930 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:30:16,940 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:30:16,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:30:17,004 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;@6bac133a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:30:17,005 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 10:30:17,009 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:17,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 10:30:17,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:17,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:17,017 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:17,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:17,022 INFO L85 PathProgramCache]: Analyzing trace with hash 133671584, now seen corresponding path program 1 times [2022-11-20 10:30:17,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:17,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972340736] [2022-11-20 10:30:17,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:17,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:17,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:17,248 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 10:30:17,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:17,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972340736] [2022-11-20 10:30:17,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972340736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:17,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:30:17,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:30:17,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542067760] [2022-11-20 10:30:17,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:17,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:30:17,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:17,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:30:17,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:30:17,304 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:17,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:17,330 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2022-11-20 10:30:17,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:30:17,332 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 10:30:17,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:17,343 INFO L225 Difference]: With dead ends: 29 [2022-11-20 10:30:17,343 INFO L226 Difference]: Without dead ends: 14 [2022-11-20 10:30:17,346 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 10:30:17,353 INFO L413 NwaCegarLoop]: 21 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, 21 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 10:30:17,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:30:17,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-20 10:30:17,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-20 10:30:17,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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 10:30:17,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-20 10:30:17,388 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-11-20 10:30:17,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:17,389 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-20 10:30:17,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:17,390 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-20 10:30:17,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 10:30:17,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:17,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:17,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:30:17,393 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:17,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:17,394 INFO L85 PathProgramCache]: Analyzing trace with hash 121665811, now seen corresponding path program 1 times [2022-11-20 10:30:17,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:17,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94501796] [2022-11-20 10:30:17,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:17,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:17,540 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 10:30:17,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:17,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94501796] [2022-11-20 10:30:17,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94501796] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:17,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:30:17,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:30:17,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722856107] [2022-11-20 10:30:17,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:17,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:30:17,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:17,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:30:17,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:30:17,548 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:17,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:17,606 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-11-20 10:30:17,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:30:17,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 10:30:17,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:17,607 INFO L225 Difference]: With dead ends: 29 [2022-11-20 10:30:17,607 INFO L226 Difference]: Without dead ends: 18 [2022-11-20 10:30:17,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:30:17,609 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:30:17,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 17 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:30:17,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-20 10:30:17,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2022-11-20 10:30:17,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 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 10:30:17,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-11-20 10:30:17,614 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2022-11-20 10:30:17,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:17,614 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-11-20 10:30:17,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:17,615 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-11-20 10:30:17,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:30:17,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:17,616 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:17,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:30:17,616 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:17,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:17,621 INFO L85 PathProgramCache]: Analyzing trace with hash 729197006, now seen corresponding path program 1 times [2022-11-20 10:30:17,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:17,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481228275] [2022-11-20 10:30:17,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:17,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:17,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:17,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:17,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481228275] [2022-11-20 10:30:17,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481228275] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:17,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:30:17,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:30:17,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741151803] [2022-11-20 10:30:17,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:17,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:30:17,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:17,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:30:17,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:30:17,723 INFO L87 Difference]: Start difference. First operand 16 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 10:30:17,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:17,756 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-11-20 10:30:17,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:30:17,757 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 10:30:17,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:17,757 INFO L225 Difference]: With dead ends: 32 [2022-11-20 10:30:17,758 INFO L226 Difference]: Without dead ends: 25 [2022-11-20 10:30:17,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:30:17,759 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:30:17,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 18 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:30:17,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-20 10:30:17,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2022-11-20 10:30:17,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:17,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-11-20 10:30:17,765 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2022-11-20 10:30:17,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:17,765 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-11-20 10:30:17,765 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 10:30:17,765 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-11-20 10:30:17,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 10:30:17,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:17,766 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:17,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 10:30:17,767 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:17,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:17,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1021157689, now seen corresponding path program 1 times [2022-11-20 10:30:17,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:17,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620921008] [2022-11-20 10:30:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:17,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:17,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:30:18,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:18,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620921008] [2022-11-20 10:30:18,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620921008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:18,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:30:18,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 10:30:18,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750122632] [2022-11-20 10:30:18,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:18,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 10:30:18,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:18,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 10:30:18,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:30:18,412 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 10:30:18,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:18,524 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-11-20 10:30:18,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:30:18,525 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 10:30:18,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:18,526 INFO L225 Difference]: With dead ends: 27 [2022-11-20 10:30:18,526 INFO L226 Difference]: Without dead ends: 25 [2022-11-20 10:30:18,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:30:18,528 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:30:18,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 27 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:30:18,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-20 10:30:18,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2022-11-20 10:30:18,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:18,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-11-20 10:30:18,534 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2022-11-20 10:30:18,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:18,535 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-11-20 10:30:18,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 10:30:18,535 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-11-20 10:30:18,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 10:30:18,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:18,536 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:18,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 10:30:18,537 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:18,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:18,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1566850755, now seen corresponding path program 1 times [2022-11-20 10:30:18,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:18,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650181988] [2022-11-20 10:30:18,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:18,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:19,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:19,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650181988] [2022-11-20 10:30:19,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650181988] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:19,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555656444] [2022-11-20 10:30:19,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:19,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:19,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:19,179 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:19,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:30:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:19,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 10:30:19,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:19,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:30:19,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:30:19,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-20 10:30:20,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:30:20,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:30:20,506 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:30:20,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 13 [2022-11-20 10:30:20,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:20,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:20,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-11-20 10:30:21,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2022-11-20 10:30:21,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:21,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555656444] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:21,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:21,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-11-20 10:30:21,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375132485] [2022-11-20 10:30:21,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:21,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 10:30:21,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:21,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 10:30:21,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2022-11-20 10:30:21,053 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 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 10:30:21,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:21,518 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2022-11-20 10:30:21,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 10:30:21,524 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 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) Word has length 20 [2022-11-20 10:30:21,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:21,525 INFO L225 Difference]: With dead ends: 43 [2022-11-20 10:30:21,525 INFO L226 Difference]: Without dead ends: 41 [2022-11-20 10:30:21,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=318, Invalid=1014, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 10:30:21,528 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:30:21,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 60 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2022-11-20 10:30:21,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-20 10:30:21,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 25. [2022-11-20 10:30:21,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 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 10:30:21,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-11-20 10:30:21,536 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2022-11-20 10:30:21,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:21,536 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-11-20 10:30:21,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 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 10:30:21,537 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-11-20 10:30:21,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 10:30:21,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:21,538 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:21,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:21,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:21,747 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:21,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:21,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1995245389, now seen corresponding path program 2 times [2022-11-20 10:30:21,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:21,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898160730] [2022-11-20 10:30:21,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:21,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:21,849 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:21,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:21,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898160730] [2022-11-20 10:30:21,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898160730] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:21,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826337352] [2022-11-20 10:30:21,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:30:21,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:21,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:21,852 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:21,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:30:21,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:30:21,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:30:21,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 10:30:21,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:22,117 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 10:30:22,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:22,267 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:22,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826337352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:22,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:22,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 12 [2022-11-20 10:30:22,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254372914] [2022-11-20 10:30:22,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:22,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:30:22,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:22,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:30:22,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:30:22,269 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:22,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:22,395 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-11-20 10:30:22,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:30:22,396 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-20 10:30:22,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:22,397 INFO L225 Difference]: With dead ends: 56 [2022-11-20 10:30:22,397 INFO L226 Difference]: Without dead ends: 31 [2022-11-20 10:30:22,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:30:22,398 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:30:22,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 36 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:30:22,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-20 10:30:22,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-11-20 10:30:22,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:22,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-11-20 10:30:22,406 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2022-11-20 10:30:22,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:22,407 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-11-20 10:30:22,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:22,407 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-11-20 10:30:22,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 10:30:22,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:22,408 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:22,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:22,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 10:30:22,615 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:22,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:22,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1191072622, now seen corresponding path program 3 times [2022-11-20 10:30:22,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:22,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139120678] [2022-11-20 10:30:22,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:22,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:23,687 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:23,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:23,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139120678] [2022-11-20 10:30:23,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139120678] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:23,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326405739] [2022-11-20 10:30:23,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:30:23,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:23,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:23,690 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:23,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:30:23,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 10:30:23,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:30:23,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 10:30:23,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:23,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:30:23,927 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-20 10:30:23,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 37 [2022-11-20 10:30:24,032 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-20 10:30:24,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 49 [2022-11-20 10:30:24,377 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-20 10:30:24,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 51 [2022-11-20 10:30:25,670 INFO L321 Elim1Store]: treesize reduction 45, result has 38.4 percent of original size [2022-11-20 10:30:25,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 72 [2022-11-20 10:30:25,817 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:25,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:26,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-11-20 10:30:26,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 178 [2022-11-20 10:30:26,840 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:26,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326405739] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:26,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:26,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 14] total 38 [2022-11-20 10:30:26,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604154804] [2022-11-20 10:30:26,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:26,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-20 10:30:26,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:26,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-20 10:30:26,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1124, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 10:30:26,844 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:35,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:35,979 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2022-11-20 10:30:35,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-20 10:30:35,983 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-20 10:30:35,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:35,983 INFO L225 Difference]: With dead ends: 78 [2022-11-20 10:30:35,983 INFO L226 Difference]: Without dead ends: 48 [2022-11-20 10:30:35,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 37 SyntacticMatches, 12 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1697 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=903, Invalid=3789, Unknown=0, NotChecked=0, Total=4692 [2022-11-20 10:30:35,986 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 86 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:30:35,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 113 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 46 Invalid, 0 Unknown, 68 Unchecked, 0.0s Time] [2022-11-20 10:30:35,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-20 10:30:35,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-11-20 10:30:35,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:35,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-11-20 10:30:35,996 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 28 [2022-11-20 10:30:35,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:35,996 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-11-20 10:30:35,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:35,997 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-11-20 10:30:35,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 10:30:35,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:35,998 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:36,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:36,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 10:30:36,207 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:36,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:36,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1209559974, now seen corresponding path program 4 times [2022-11-20 10:30:36,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:36,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386229052] [2022-11-20 10:30:36,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:36,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:37,317 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:30:37,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:37,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386229052] [2022-11-20 10:30:37,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386229052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:37,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359552477] [2022-11-20 10:30:37,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:30:37,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:37,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:37,320 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:37,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:30:37,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:30:37,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:30:37,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-20 10:30:37,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:37,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:30:37,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:30:37,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:30:37,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:30:37,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:30:37,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:30:37,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-20 10:30:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 24 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:30:37,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:38,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-11-20 10:30:38,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2022-11-20 10:30:38,555 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:30:38,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359552477] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:38,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:38,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15] total 35 [2022-11-20 10:30:38,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626628511] [2022-11-20 10:30:38,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:38,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 10:30:38,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:38,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 10:30:38,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=946, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 10:30:38,561 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 35 states, 35 states have (on average 2.914285714285714) internal successors, (102), 35 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 10:30:40,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:40,195 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2022-11-20 10:30:40,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 10:30:40,196 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.914285714285714) internal successors, (102), 35 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-20 10:30:40,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:40,198 INFO L225 Difference]: With dead ends: 68 [2022-11-20 10:30:40,199 INFO L226 Difference]: Without dead ends: 66 [2022-11-20 10:30:40,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 61 SyntacticMatches, 8 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=942, Invalid=3348, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 10:30:40,201 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 212 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:30:40,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 85 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 349 Invalid, 0 Unknown, 46 Unchecked, 0.4s Time] [2022-11-20 10:30:40,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-20 10:30:40,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 45. [2022-11-20 10:30:40,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 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 10:30:40,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2022-11-20 10:30:40,214 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 40 [2022-11-20 10:30:40,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:40,215 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2022-11-20 10:30:40,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.914285714285714) internal successors, (102), 35 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 10:30:40,215 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2022-11-20 10:30:40,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 10:30:40,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:40,216 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:40,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-20 10:30:40,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:40,424 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:40,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:40,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1613367984, now seen corresponding path program 5 times [2022-11-20 10:30:40,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:40,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831171194] [2022-11-20 10:30:40,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:40,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:41,364 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 13 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:41,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:41,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831171194] [2022-11-20 10:30:41,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831171194] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:41,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219760163] [2022-11-20 10:30:41,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:30:41,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:41,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:41,367 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:41,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:30:41,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-20 10:30:41,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:30:41,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-20 10:30:41,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:41,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:30:41,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:30:41,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:30:41,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:30:41,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:30:41,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:30:41,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:30:41,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:30:42,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-20 10:30:42,476 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 13 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:42,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:43,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-20 10:30:43,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-20 10:30:43,190 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 24 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:43,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219760163] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:43,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:43,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 34 [2022-11-20 10:30:43,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625293109] [2022-11-20 10:30:43,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:43,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 10:30:43,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:43,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 10:30:43,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 10:30:43,196 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 34 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:45,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:45,120 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2022-11-20 10:30:45,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-20 10:30:45,120 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-20 10:30:45,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:45,121 INFO L225 Difference]: With dead ends: 88 [2022-11-20 10:30:45,121 INFO L226 Difference]: Without dead ends: 86 [2022-11-20 10:30:45,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 69 SyntacticMatches, 10 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1032, Invalid=3938, Unknown=0, NotChecked=0, Total=4970 [2022-11-20 10:30:45,123 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 253 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:30:45,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 167 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 538 Invalid, 0 Unknown, 13 Unchecked, 0.5s Time] [2022-11-20 10:30:45,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-20 10:30:45,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 49. [2022-11-20 10:30:45,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:45,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-11-20 10:30:45,143 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 44 [2022-11-20 10:30:45,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:45,144 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-11-20 10:30:45,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:45,144 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-11-20 10:30:45,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 10:30:45,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:45,147 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:45,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:45,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:45,353 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:45,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:45,353 INFO L85 PathProgramCache]: Analyzing trace with hash 924773190, now seen corresponding path program 6 times [2022-11-20 10:30:45,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:45,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623015098] [2022-11-20 10:30:45,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:45,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 33 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:45,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:45,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623015098] [2022-11-20 10:30:45,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623015098] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:45,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446798917] [2022-11-20 10:30:45,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:30:45,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:45,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:45,546 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:45,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:30:45,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-20 10:30:45,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:30:45,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 10:30:45,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:45,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 63 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:46,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446798917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:46,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:46,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 21 [2022-11-20 10:30:46,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718803548] [2022-11-20 10:30:46,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:46,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 10:30:46,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:46,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 10:30:46,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=251, Unknown=0, NotChecked=0, Total=420 [2022-11-20 10:30:46,093 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:46,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:46,356 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2022-11-20 10:30:46,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 10:30:46,356 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-20 10:30:46,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:46,357 INFO L225 Difference]: With dead ends: 117 [2022-11-20 10:30:46,357 INFO L226 Difference]: Without dead ends: 63 [2022-11-20 10:30:46,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 82 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=251, Invalid=399, Unknown=0, NotChecked=0, Total=650 [2022-11-20 10:30:46,358 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 51 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:30:46,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 77 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:30:46,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-20 10:30:46,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2022-11-20 10:30:46,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 60 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:46,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2022-11-20 10:30:46,373 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 48 [2022-11-20 10:30:46,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:46,373 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2022-11-20 10:30:46,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:46,374 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2022-11-20 10:30:46,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-20 10:30:46,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:46,375 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:46,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:46,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 10:30:46,580 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:46,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:46,580 INFO L85 PathProgramCache]: Analyzing trace with hash 778339585, now seen corresponding path program 7 times [2022-11-20 10:30:46,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:46,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656768601] [2022-11-20 10:30:46,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:46,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 26 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:47,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:47,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656768601] [2022-11-20 10:30:47,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656768601] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:47,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83471014] [2022-11-20 10:30:47,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:30:47,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:47,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:47,914 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:47,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:30:48,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:48,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-20 10:30:48,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:48,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:30:48,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:30:48,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:30:48,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:30:48,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:30:48,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:30:48,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:30:48,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:30:48,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:30:48,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:30:48,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 10:30:48,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 10:30:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 16 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:48,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:49,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-11-20 10:30:49,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 122 [2022-11-20 10:30:49,916 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 30 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:49,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83471014] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:49,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:49,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 43 [2022-11-20 10:30:49,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778814818] [2022-11-20 10:30:49,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:49,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 10:30:49,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:49,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 10:30:49,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1486, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 10:30:49,919 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 43 states, 43 states have (on average 3.186046511627907) internal successors, (137), 43 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:51,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:51,108 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2022-11-20 10:30:51,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 10:30:51,108 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.186046511627907) internal successors, (137), 43 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-20 10:30:51,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:51,110 INFO L225 Difference]: With dead ends: 73 [2022-11-20 10:30:51,110 INFO L226 Difference]: Without dead ends: 71 [2022-11-20 10:30:51,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1709 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1083, Invalid=4173, Unknown=0, NotChecked=0, Total=5256 [2022-11-20 10:30:51,111 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 238 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:30:51,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 158 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 302 Invalid, 0 Unknown, 71 Unchecked, 0.3s Time] [2022-11-20 10:30:51,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-20 10:30:51,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2022-11-20 10:30:51,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.078125) internal successors, (69), 64 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:51,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2022-11-20 10:30:51,127 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 52 [2022-11-20 10:30:51,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:51,127 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2022-11-20 10:30:51,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.186046511627907) internal successors, (137), 43 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:51,128 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2022-11-20 10:30:51,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-20 10:30:51,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:51,129 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:51,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:51,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 10:30:51,335 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:51,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:51,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1215546761, now seen corresponding path program 8 times [2022-11-20 10:30:51,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:51,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733149312] [2022-11-20 10:30:51,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:51,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:51,530 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 51 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:51,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:51,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733149312] [2022-11-20 10:30:51,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733149312] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:51,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791823369] [2022-11-20 10:30:51,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:30:51,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:51,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:51,532 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:51,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 10:30:51,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:30:51,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:30:51,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 10:30:51,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:51,834 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:51,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 88 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:52,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791823369] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:52,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:52,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 24 [2022-11-20 10:30:52,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708058343] [2022-11-20 10:30:52,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:52,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 10:30:52,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:52,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 10:30:52,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2022-11-20 10:30:52,086 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 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 10:30:52,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:52,261 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2022-11-20 10:30:52,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 10:30:52,261 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-20 10:30:52,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:52,262 INFO L225 Difference]: With dead ends: 120 [2022-11-20 10:30:52,262 INFO L226 Difference]: Without dead ends: 71 [2022-11-20 10:30:52,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 96 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=361, Unknown=0, NotChecked=0, Total=600 [2022-11-20 10:30:52,263 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 39 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:30:52,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 74 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:30:52,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-20 10:30:52,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-11-20 10:30:52,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 68 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 10:30:52,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2022-11-20 10:30:52,278 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 56 [2022-11-20 10:30:52,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:52,279 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2022-11-20 10:30:52,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 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 10:30:52,279 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2022-11-20 10:30:52,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 10:30:52,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:52,280 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:52,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:52,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:52,486 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:52,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:52,486 INFO L85 PathProgramCache]: Analyzing trace with hash -836376270, now seen corresponding path program 9 times [2022-11-20 10:30:52,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:52,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828089920] [2022-11-20 10:30:52,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:52,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 19 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:53,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:53,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828089920] [2022-11-20 10:30:53,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828089920] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:53,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727727922] [2022-11-20 10:30:53,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:30:53,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:53,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:53,823 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:53,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 10:30:54,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-20 10:30:54,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:30:54,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-20 10:30:54,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:54,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:30:54,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:30:54,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:30:54,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:30:54,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:30:54,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:30:54,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:30:54,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:30:54,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:30:54,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:30:54,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:30:54,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:30:55,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-20 10:30:55,427 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 19 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:55,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:56,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-20 10:30:56,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-20 10:30:56,444 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 36 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:56,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727727922] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:56,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:56,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21, 21] total 42 [2022-11-20 10:30:56,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468638451] [2022-11-20 10:30:56,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:56,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-20 10:30:56,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:56,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-20 10:30:56,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1438, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 10:30:56,447 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 42 states, 42 states have (on average 3.5238095238095237) internal successors, (148), 42 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 10:30:58,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:58,151 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2022-11-20 10:30:58,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 10:30:58,152 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.5238095238095237) internal successors, (148), 42 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) Word has length 60 [2022-11-20 10:30:58,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:58,153 INFO L225 Difference]: With dead ends: 86 [2022-11-20 10:30:58,153 INFO L226 Difference]: Without dead ends: 84 [2022-11-20 10:30:58,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 99 SyntacticMatches, 14 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1820 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1164, Invalid=4688, Unknown=0, NotChecked=0, Total=5852 [2022-11-20 10:30:58,155 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 141 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:30:58,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 203 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 638 Invalid, 0 Unknown, 80 Unchecked, 0.5s Time] [2022-11-20 10:30:58,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-20 10:30:58,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2022-11-20 10:30:58,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 72 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:58,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2022-11-20 10:30:58,175 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 60 [2022-11-20 10:30:58,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:58,176 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2022-11-20 10:30:58,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.5238095238095237) internal successors, (148), 42 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 10:30:58,176 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2022-11-20 10:30:58,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-20 10:30:58,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:58,177 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:58,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:58,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 10:30:58,384 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:58,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:58,384 INFO L85 PathProgramCache]: Analyzing trace with hash 313400872, now seen corresponding path program 10 times [2022-11-20 10:30:58,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:58,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635926476] [2022-11-20 10:30:58,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:58,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:58,611 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 73 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:58,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:58,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635926476] [2022-11-20 10:30:58,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635926476] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:58,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39374374] [2022-11-20 10:30:58,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:30:58,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:58,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:58,614 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:58,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 10:30:58,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:30:58,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:30:58,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 10:30:58,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:59,075 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:59,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:59,403 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 117 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:59,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39374374] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:59,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:59,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 18] total 27 [2022-11-20 10:30:59,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201330220] [2022-11-20 10:30:59,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:59,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 10:30:59,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:59,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 10:30:59,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=422, Unknown=0, NotChecked=0, Total=702 [2022-11-20 10:30:59,406 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 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 10:30:59,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:59,630 INFO L93 Difference]: Finished difference Result 132 states and 141 transitions. [2022-11-20 10:30:59,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 10:30:59,631 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-11-20 10:30:59,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:59,631 INFO L225 Difference]: With dead ends: 132 [2022-11-20 10:30:59,632 INFO L226 Difference]: Without dead ends: 79 [2022-11-20 10:30:59,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 110 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2022-11-20 10:30:59,633 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 38 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:30:59,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 108 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:30:59,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-20 10:30:59,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2022-11-20 10:30:59,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 76 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:59,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2022-11-20 10:30:59,650 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 64 [2022-11-20 10:30:59,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:59,651 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2022-11-20 10:30:59,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 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 10:30:59,651 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2022-11-20 10:30:59,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-20 10:30:59,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:59,652 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:59,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:59,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 10:30:59,859 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:59,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:59,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1370939875, now seen corresponding path program 11 times [2022-11-20 10:30:59,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:59,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982748704] [2022-11-20 10:30:59,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:59,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:59,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:01,308 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 22 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:01,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:01,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982748704] [2022-11-20 10:31:01,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982748704] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:31:01,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778255806] [2022-11-20 10:31:01,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:31:01,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:01,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:31:01,310 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:31:01,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 10:31:01,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-20 10:31:01,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:31:01,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-20 10:31:01,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:31:01,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:31:01,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:31:01,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:31:01,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:31:01,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:31:01,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:31:01,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:31:01,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:31:01,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:31:01,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:31:01,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:31:02,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:31:02,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:31:02,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:31:02,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-20 10:31:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 22 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:02,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:31:04,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-20 10:31:04,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-20 10:31:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 42 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:04,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778255806] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:31:04,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:31:04,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23, 23] total 46 [2022-11-20 10:31:04,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750257089] [2022-11-20 10:31:04,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:31:04,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-20 10:31:04,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:04,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-20 10:31:04,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=1742, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 10:31:04,173 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 46 states, 46 states have (on average 3.608695652173913) internal successors, (166), 46 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:06,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:06,544 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2022-11-20 10:31:06,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-20 10:31:06,545 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.608695652173913) internal successors, (166), 46 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-20 10:31:06,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:06,545 INFO L225 Difference]: With dead ends: 94 [2022-11-20 10:31:06,545 INFO L226 Difference]: Without dead ends: 92 [2022-11-20 10:31:06,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 114 SyntacticMatches, 16 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2206 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1352, Invalid=5620, Unknown=0, NotChecked=0, Total=6972 [2022-11-20 10:31:06,548 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 192 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:06,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 261 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 891 Invalid, 0 Unknown, 84 Unchecked, 0.7s Time] [2022-11-20 10:31:06,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-20 10:31:06,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2022-11-20 10:31:06,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.0625) internal successors, (85), 80 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 10:31:06,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2022-11-20 10:31:06,568 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 68 [2022-11-20 10:31:06,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:06,568 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2022-11-20 10:31:06,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.608695652173913) internal successors, (166), 46 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:06,569 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2022-11-20 10:31:06,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-20 10:31:06,570 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:06,570 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:06,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 10:31:06,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:06,777 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:31:06,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:06,777 INFO L85 PathProgramCache]: Analyzing trace with hash -20883879, now seen corresponding path program 12 times [2022-11-20 10:31:06,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:06,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768161311] [2022-11-20 10:31:06,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:06,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:07,058 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 99 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:07,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:07,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768161311] [2022-11-20 10:31:07,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768161311] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:31:07,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142613304] [2022-11-20 10:31:07,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:31:07,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:07,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:31:07,061 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:31:07,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 10:31:07,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-20 10:31:07,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:31:07,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:31:07,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:31:07,872 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:07,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:31:08,193 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 150 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:08,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142613304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:31:08,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:31:08,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 20] total 30 [2022-11-20 10:31:08,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611837492] [2022-11-20 10:31:08,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:31:08,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 10:31:08,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:08,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 10:31:08,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=524, Unknown=0, NotChecked=0, Total=870 [2022-11-20 10:31:08,196 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:08,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:08,403 INFO L93 Difference]: Finished difference Result 144 states and 153 transitions. [2022-11-20 10:31:08,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 10:31:08,404 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-11-20 10:31:08,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:08,405 INFO L225 Difference]: With dead ends: 144 [2022-11-20 10:31:08,405 INFO L226 Difference]: Without dead ends: 87 [2022-11-20 10:31:08,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 124 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=368, Invalid=562, Unknown=0, NotChecked=0, Total=930 [2022-11-20 10:31:08,406 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 44 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:08,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 110 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:31:08,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-20 10:31:08,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2022-11-20 10:31:08,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0595238095238095) internal successors, (89), 84 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:08,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2022-11-20 10:31:08,424 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 72 [2022-11-20 10:31:08,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:08,425 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2022-11-20 10:31:08,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:08,425 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2022-11-20 10:31:08,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-20 10:31:08,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:08,426 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:08,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 10:31:08,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:08,635 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:31:08,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:08,635 INFO L85 PathProgramCache]: Analyzing trace with hash 609496852, now seen corresponding path program 13 times [2022-11-20 10:31:08,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:08,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744138428] [2022-11-20 10:31:08,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:08,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:08,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:10,806 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 29 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:10,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:10,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744138428] [2022-11-20 10:31:10,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744138428] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:31:10,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913330940] [2022-11-20 10:31:10,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:31:10,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:10,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:31:10,809 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:31:10,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 10:31:10,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:10,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-20 10:31:10,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:31:10,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:31:10,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:31:11,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:31:11,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:31:11,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:31:11,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:31:11,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:31:11,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:31:11,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:31:11,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:31:11,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:31:11,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:31:11,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:31:11,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:31:11,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:31:11,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:31:11,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 10:31:12,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 10:31:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 25 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:12,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:31:14,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-11-20 10:31:14,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 266 treesize of output 258 [2022-11-20 10:31:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 48 proven. 233 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:14,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913330940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:31:14,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:31:14,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 25, 26] total 53 [2022-11-20 10:31:14,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302376801] [2022-11-20 10:31:14,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:31:14,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-20 10:31:14,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:14,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-20 10:31:14,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=2312, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 10:31:14,226 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 53 states, 53 states have (on average 3.5283018867924527) internal successors, (187), 53 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 10:32:09,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:09,590 INFO L93 Difference]: Finished difference Result 182 states and 208 transitions. [2022-11-20 10:32:09,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-11-20 10:32:09,591 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.5283018867924527) internal successors, (187), 53 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 76 [2022-11-20 10:32:09,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:09,593 INFO L225 Difference]: With dead ends: 182 [2022-11-20 10:32:09,593 INFO L226 Difference]: Without dead ends: 180 [2022-11-20 10:32:09,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 134 SyntacticMatches, 20 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6239 ImplicationChecksByTransitivity, 56.8s TimeCoverageRelationStatistics Valid=3962, Invalid=16044, Unknown=16, NotChecked=0, Total=20022 [2022-11-20 10:32:09,597 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 224 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 305 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:09,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 280 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1064 Invalid, 0 Unknown, 305 Unchecked, 0.9s Time] [2022-11-20 10:32:09,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-20 10:32:09,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 89. [2022-11-20 10:32:09,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0568181818181819) internal successors, (93), 88 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:09,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2022-11-20 10:32:09,620 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 76 [2022-11-20 10:32:09,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:09,620 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2022-11-20 10:32:09,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.5283018867924527) internal successors, (187), 53 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 10:32:09,621 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2022-11-20 10:32:09,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-20 10:32:09,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:09,622 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:09,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-20 10:32:09,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 10:32:09,828 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:32:09,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:09,829 INFO L85 PathProgramCache]: Analyzing trace with hash 2057478922, now seen corresponding path program 14 times [2022-11-20 10:32:09,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:32:09,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222078951] [2022-11-20 10:32:09,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:09,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:32:09,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:10,196 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 129 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:10,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:32:10,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222078951] [2022-11-20 10:32:10,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222078951] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:32:10,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259784212] [2022-11-20 10:32:10,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:32:10,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:32:10,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:32:10,199 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:32:10,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 10:32:10,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:32:10,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:32:10,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 10:32:10,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:10,777 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 162 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:10,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:32:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 187 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:11,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259784212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:32:11,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:32:11,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22, 22] total 33 [2022-11-20 10:32:11,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212403407] [2022-11-20 10:32:11,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:32:11,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-20 10:32:11,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:32:11,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-20 10:32:11,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=637, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 10:32:11,213 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 33 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 10:32:11,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:11,479 INFO L93 Difference]: Finished difference Result 156 states and 165 transitions. [2022-11-20 10:32:11,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 10:32:11,479 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 33 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) Word has length 80 [2022-11-20 10:32:11,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:11,480 INFO L225 Difference]: With dead ends: 156 [2022-11-20 10:32:11,480 INFO L226 Difference]: Without dead ends: 95 [2022-11-20 10:32:11,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 138 SyntacticMatches, 11 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=443, Invalid=679, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 10:32:11,481 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 54 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:11,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 116 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:32:11,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-20 10:32:11,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2022-11-20 10:32:11,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0543478260869565) internal successors, (97), 92 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 10:32:11,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2022-11-20 10:32:11,504 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 80 [2022-11-20 10:32:11,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:11,504 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2022-11-20 10:32:11,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 33 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 10:32:11,504 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2022-11-20 10:32:11,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-20 10:32:11,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:11,505 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:11,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:11,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 10:32:11,706 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:32:11,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:11,706 INFO L85 PathProgramCache]: Analyzing trace with hash -103116603, now seen corresponding path program 15 times [2022-11-20 10:32:11,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:32:11,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064553175] [2022-11-20 10:32:11,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:11,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:32:11,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:13,782 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 28 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:13,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:32:13,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064553175] [2022-11-20 10:32:13,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064553175] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:32:13,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067188975] [2022-11-20 10:32:13,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:32:13,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:32:13,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:32:13,784 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:32:13,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 10:32:14,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-20 10:32:14,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:32:14,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-20 10:32:14,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:14,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:32:14,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:32:14,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:32:14,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:32:14,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:32:14,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:32:14,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:32:14,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:32:14,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:32:14,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:32:14,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:32:15,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:32:15,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:32:15,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:32:15,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:32:15,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:32:15,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:32:15,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:32:16,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-20 10:32:16,862 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:16,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:32:20,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-11-20 10:32:20,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 122 [2022-11-20 10:32:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 54 proven. 298 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:20,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067188975] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:32:20,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:32:20,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27, 27] total 66 [2022-11-20 10:32:20,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225452603] [2022-11-20 10:32:20,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:32:20,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 10:32:20,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:32:20,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 10:32:20,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=693, Invalid=3597, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 10:32:20,316 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 66 states, 66 states have (on average 3.6666666666666665) internal successors, (242), 66 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 10:32:28,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:28,123 INFO L93 Difference]: Finished difference Result 199 states and 217 transitions. [2022-11-20 10:32:28,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-11-20 10:32:28,123 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.6666666666666665) internal successors, (242), 66 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) Word has length 84 [2022-11-20 10:32:28,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:28,125 INFO L225 Difference]: With dead ends: 199 [2022-11-20 10:32:28,125 INFO L226 Difference]: Without dead ends: 197 [2022-11-20 10:32:28,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 154 SyntacticMatches, 18 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8675 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=3489, Invalid=21633, Unknown=0, NotChecked=0, Total=25122 [2022-11-20 10:32:28,127 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 648 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1512 mSolverCounterSat, 507 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 2367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 507 IncrementalHoareTripleChecker+Valid, 1512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 348 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:28,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [648 Valid, 613 Invalid, 2367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [507 Valid, 1512 Invalid, 0 Unknown, 348 Unchecked, 1.8s Time] [2022-11-20 10:32:28,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-20 10:32:28,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 145. [2022-11-20 10:32:28,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0486111111111112) internal successors, (151), 144 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:28,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 151 transitions. [2022-11-20 10:32:28,159 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 151 transitions. Word has length 84 [2022-11-20 10:32:28,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:28,159 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 151 transitions. [2022-11-20 10:32:28,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.6666666666666665) internal successors, (242), 66 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 10:32:28,159 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 151 transitions. [2022-11-20 10:32:28,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-20 10:32:28,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:28,160 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:28,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:28,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:32:28,367 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:32:28,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:28,368 INFO L85 PathProgramCache]: Analyzing trace with hash 2126956278, now seen corresponding path program 16 times [2022-11-20 10:32:28,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:32:28,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138312602] [2022-11-20 10:32:28,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:28,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:32:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:30,937 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 31 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:30,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:32:30,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138312602] [2022-11-20 10:32:30,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138312602] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:32:30,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134911644] [2022-11-20 10:32:30,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:32:30,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:32:30,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:32:30,939 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:32:30,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 10:32:31,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:32:31,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:32:31,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-20 10:32:31,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:31,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:32:31,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:32:31,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:32:31,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:32:31,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:32:31,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:32:31,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:32:31,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:32:31,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:32:31,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:32:31,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:32:31,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:32:31,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:32:31,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:32:31,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:32:31,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:32:31,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:32:31,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:32:31,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:32:31,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 10:32:31,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-20 10:32:32,000 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 31 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:32,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:32:33,994 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 60 proven. 371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:33,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134911644] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:32:33,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:32:33,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 28, 29] total 46 [2022-11-20 10:32:33,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889362928] [2022-11-20 10:32:33,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:32:33,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-20 10:32:33,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:32:33,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-20 10:32:33,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=1724, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 10:32:33,997 INFO L87 Difference]: Start difference. First operand 145 states and 151 transitions. Second operand has 46 states, 46 states have (on average 4.043478260869565) internal successors, (186), 46 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 10:32:40,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:40,675 INFO L93 Difference]: Finished difference Result 207 states and 214 transitions. [2022-11-20 10:32:40,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-20 10:32:40,676 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.043478260869565) internal successors, (186), 46 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-20 10:32:40,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:40,677 INFO L225 Difference]: With dead ends: 207 [2022-11-20 10:32:40,677 INFO L226 Difference]: Without dead ends: 205 [2022-11-20 10:32:40,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 171 SyntacticMatches, 22 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5135 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=2964, Invalid=12536, Unknown=0, NotChecked=0, Total=15500 [2022-11-20 10:32:40,680 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 375 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 1501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:40,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 485 Invalid, 1501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-20 10:32:40,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-20 10:32:40,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 145. [2022-11-20 10:32:40,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0486111111111112) internal successors, (151), 144 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:40,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 151 transitions. [2022-11-20 10:32:40,725 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 151 transitions. Word has length 92 [2022-11-20 10:32:40,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:40,725 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 151 transitions. [2022-11-20 10:32:40,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.043478260869565) internal successors, (186), 46 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 10:32:40,725 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 151 transitions. [2022-11-20 10:32:40,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-20 10:32:40,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:40,726 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:40,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:40,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:32:40,927 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:32:40,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:40,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1469941268, now seen corresponding path program 17 times [2022-11-20 10:32:40,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:32:40,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249537319] [2022-11-20 10:32:40,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:40,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:32:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:41,374 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 201 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:41,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:32:41,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249537319] [2022-11-20 10:32:41,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249537319] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:32:41,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609478853] [2022-11-20 10:32:41,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:32:41,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:32:41,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:32:41,377 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:32:41,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 10:32:42,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-20 10:32:42,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:32:42,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 10:32:42,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 242 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:42,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:32:43,163 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 273 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:43,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609478853] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:32:43,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:32:43,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26, 26] total 39 [2022-11-20 10:32:43,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609818041] [2022-11-20 10:32:43,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:32:43,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-20 10:32:43,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:32:43,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-20 10:32:43,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=586, Invalid=896, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 10:32:43,166 INFO L87 Difference]: Start difference. First operand 145 states and 151 transitions. Second operand has 39 states, 39 states have (on average 4.871794871794871) internal successors, (190), 39 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:43,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:43,586 INFO L93 Difference]: Finished difference Result 262 states and 273 transitions. [2022-11-20 10:32:43,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 10:32:43,586 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.871794871794871) internal successors, (190), 39 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2022-11-20 10:32:43,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:43,587 INFO L225 Difference]: With dead ends: 262 [2022-11-20 10:32:43,587 INFO L226 Difference]: Without dead ends: 111 [2022-11-20 10:32:43,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 166 SyntacticMatches, 13 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=642, Invalid=998, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 10:32:43,591 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 55 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:43,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 166 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:32:43,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-20 10:32:43,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2022-11-20 10:32:43,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0462962962962963) internal successors, (113), 108 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:43,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2022-11-20 10:32:43,617 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 96 [2022-11-20 10:32:43,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:43,617 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2022-11-20 10:32:43,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.871794871794871) internal successors, (190), 39 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:43,618 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2022-11-20 10:32:43,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-20 10:32:43,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:43,619 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:43,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:43,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:32:43,826 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:32:43,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:43,826 INFO L85 PathProgramCache]: Analyzing trace with hash 137728423, now seen corresponding path program 18 times [2022-11-20 10:32:43,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:32:43,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313593836] [2022-11-20 10:32:43,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:43,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:32:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 44 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:48,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:32:48,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313593836] [2022-11-20 10:32:48,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313593836] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:32:48,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125228359] [2022-11-20 10:32:48,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:32:48,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:32:48,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:32:48,056 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:32:48,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 10:32:48,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-11-20 10:32:48,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:32:48,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-20 10:32:49,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:49,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:32:49,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:32:49,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:32:49,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:32:49,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:32:49,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:32:49,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:32:49,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:32:49,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:32:49,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:32:49,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:32:49,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:32:49,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:32:49,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:32:49,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:32:49,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:32:49,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:32:50,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:32:50,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:32:50,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:32:50,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:32:50,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:32:52,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-20 10:32:52,484 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 0 proven. 518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:52,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:32:56,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-11-20 10:32:56,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 122 [2022-11-20 10:32:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 66 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:56,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125228359] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:32:56,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:32:56,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 31, 31] total 81 [2022-11-20 10:32:56,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942631516] [2022-11-20 10:32:56,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:32:56,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-11-20 10:32:56,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:32:56,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-11-20 10:32:56,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1005, Invalid=5475, Unknown=0, NotChecked=0, Total=6480 [2022-11-20 10:32:56,858 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand has 81 states, 81 states have (on average 3.617283950617284) internal successors, (293), 81 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:07,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:07,428 INFO L93 Difference]: Finished difference Result 221 states and 239 transitions. [2022-11-20 10:33:07,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-11-20 10:33:07,429 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.617283950617284) internal successors, (293), 81 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2022-11-20 10:33:07,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:07,430 INFO L225 Difference]: With dead ends: 221 [2022-11-20 10:33:07,430 INFO L226 Difference]: Without dead ends: 219 [2022-11-20 10:33:07,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 176 SyntacticMatches, 21 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12337 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=4414, Invalid=28166, Unknown=0, NotChecked=0, Total=32580 [2022-11-20 10:33:07,433 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 845 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 2039 mSolverCounterSat, 641 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 3214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 641 IncrementalHoareTripleChecker+Valid, 2039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 534 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:07,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [845 Valid, 969 Invalid, 3214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [641 Valid, 2039 Invalid, 0 Unknown, 534 Unchecked, 2.6s Time] [2022-11-20 10:33:07,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-11-20 10:33:07,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 169. [2022-11-20 10:33:07,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0416666666666667) internal successors, (175), 168 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:07,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 175 transitions. [2022-11-20 10:33:07,489 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 175 transitions. Word has length 100 [2022-11-20 10:33:07,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:07,490 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 175 transitions. [2022-11-20 10:33:07,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.617283950617284) internal successors, (293), 81 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:07,491 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 175 transitions. [2022-11-20 10:33:07,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-20 10:33:07,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:07,492 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:07,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 10:33:07,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:33:07,700 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:33:07,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:07,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1138995416, now seen corresponding path program 19 times [2022-11-20 10:33:07,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:33:07,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431045262] [2022-11-20 10:33:07,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:07,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:33:07,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:13,369 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 65 proven. 548 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:13,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:33:13,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431045262] [2022-11-20 10:33:13,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431045262] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:33:13,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325432759] [2022-11-20 10:33:13,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:33:13,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:33:13,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:33:13,371 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:33:13,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 10:33:13,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:13,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 116 conjunts are in the unsatisfiable core [2022-11-20 10:33:13,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:13,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:33:13,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:33:13,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:33:13,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:33:13,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:33:13,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:33:13,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:33:13,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:33:13,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:33:13,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:33:13,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:33:14,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:33:14,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:33:14,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:33:14,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:33:14,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:33:14,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:33:14,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:33:14,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:33:14,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:33:14,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:33:14,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:33:14,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:33:14,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:33:16,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-20 10:33:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 37 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:16,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:33:20,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-11-20 10:33:20,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 122 [2022-11-20 10:33:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 72 proven. 541 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:20,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325432759] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:33:20,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:33:20,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 93 [2022-11-20 10:33:20,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339083131] [2022-11-20 10:33:20,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:33:20,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-11-20 10:33:20,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:33:20,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-11-20 10:33:20,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=7259, Unknown=0, NotChecked=0, Total=8556 [2022-11-20 10:33:20,591 INFO L87 Difference]: Start difference. First operand 169 states and 175 transitions. Second operand has 93 states, 93 states have (on average 3.3763440860215055) internal successors, (314), 93 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 10:33:39,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:39,243 INFO L93 Difference]: Finished difference Result 240 states and 249 transitions. [2022-11-20 10:33:39,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-20 10:33:39,243 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 3.3763440860215055) internal successors, (314), 93 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) Word has length 108 [2022-11-20 10:33:39,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:39,244 INFO L225 Difference]: With dead ends: 240 [2022-11-20 10:33:39,244 INFO L226 Difference]: Without dead ends: 238 [2022-11-20 10:33:39,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 182 SyntacticMatches, 23 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11318 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=5393, Invalid=24363, Unknown=0, NotChecked=0, Total=29756 [2022-11-20 10:33:39,246 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 427 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 1953 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 2650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 507 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:39,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 901 Invalid, 2650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1953 Invalid, 0 Unknown, 507 Unchecked, 2.0s Time] [2022-11-20 10:33:39,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-20 10:33:39,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 169. [2022-11-20 10:33:39,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0416666666666667) internal successors, (175), 168 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:39,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 175 transitions. [2022-11-20 10:33:39,360 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 175 transitions. Word has length 108 [2022-11-20 10:33:39,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:39,361 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 175 transitions. [2022-11-20 10:33:39,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 3.3763440860215055) internal successors, (314), 93 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 10:33:39,362 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 175 transitions. [2022-11-20 10:33:39,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-20 10:33:39,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:39,363 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:39,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-20 10:33:39,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:33:39,570 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:33:39,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:39,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1599316686, now seen corresponding path program 20 times [2022-11-20 10:33:39,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:33:39,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069650276] [2022-11-20 10:33:39,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:39,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:33:39,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:40,177 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 289 proven. 374 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:40,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:33:40,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069650276] [2022-11-20 10:33:40,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069650276] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:33:40,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619205495] [2022-11-20 10:33:40,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:33:40,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:33:40,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:33:40,183 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:33:40,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 10:33:40,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:33:40,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:33:40,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 10:33:40,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:41,096 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 338 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:41,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:33:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 375 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:41,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619205495] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:33:41,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:33:41,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 30, 30] total 45 [2022-11-20 10:33:41,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893164214] [2022-11-20 10:33:41,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:33:41,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-20 10:33:41,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:33:41,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-20 10:33:41,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=781, Invalid=1199, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 10:33:41,848 INFO L87 Difference]: Start difference. First operand 169 states and 175 transitions. Second operand has 45 states, 45 states have (on average 4.933333333333334) internal successors, (222), 45 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 10:33:42,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:42,331 INFO L93 Difference]: Finished difference Result 302 states and 313 transitions. [2022-11-20 10:33:42,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 10:33:42,332 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.933333333333334) internal successors, (222), 45 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2022-11-20 10:33:42,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:42,333 INFO L225 Difference]: With dead ends: 302 [2022-11-20 10:33:42,333 INFO L226 Difference]: Without dead ends: 127 [2022-11-20 10:33:42,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 194 SyntacticMatches, 15 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=845, Invalid=1317, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 10:33:42,334 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 64 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:42,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 158 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:33:42,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-20 10:33:42,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2022-11-20 10:33:42,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0403225806451613) internal successors, (129), 124 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:42,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2022-11-20 10:33:42,380 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 112 [2022-11-20 10:33:42,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:42,380 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2022-11-20 10:33:42,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.933333333333334) internal successors, (222), 45 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 10:33:42,381 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2022-11-20 10:33:42,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-20 10:33:42,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:42,381 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:42,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 10:33:42,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:33:42,582 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:33:42,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:42,582 INFO L85 PathProgramCache]: Analyzing trace with hash -399645559, now seen corresponding path program 21 times [2022-11-20 10:33:42,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:33:42,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175808151] [2022-11-20 10:33:42,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:42,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:33:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 40 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:46,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:33:46,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175808151] [2022-11-20 10:33:46,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175808151] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:33:46,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569696668] [2022-11-20 10:33:46,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:33:46,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:33:46,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:33:46,794 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:33:46,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 10:33:48,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-11-20 10:33:48,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:33:48,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 125 conjunts are in the unsatisfiable core [2022-11-20 10:33:48,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:48,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:33:49,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:33:49,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:33:49,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:33:49,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:33:49,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:33:49,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:33:49,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:33:49,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:33:49,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:33:49,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:33:49,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:33:49,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:33:49,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:33:49,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:33:49,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:33:49,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:33:49,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:33:49,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:33:49,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:33:49,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:33:50,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:33:50,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:33:50,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:33:50,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:33:50,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:33:52,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-20 10:33:52,344 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 716 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:52,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:33:58,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-11-20 10:33:58,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2022-11-20 10:33:58,116 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 78 proven. 638 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:58,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569696668] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:33:58,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:33:58,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 35, 35] total 86 [2022-11-20 10:33:58,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172672847] [2022-11-20 10:33:58,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:33:58,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-11-20 10:33:58,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:33:58,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-11-20 10:33:58,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1067, Invalid=6243, Unknown=0, NotChecked=0, Total=7310 [2022-11-20 10:33:58,120 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand has 86 states, 86 states have (on average 3.9302325581395348) internal successors, (338), 86 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 10:34:08,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:08,340 INFO L93 Difference]: Finished difference Result 252 states and 273 transitions. [2022-11-20 10:34:08,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-11-20 10:34:08,341 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.9302325581395348) internal successors, (338), 86 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 116 [2022-11-20 10:34:08,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:08,342 INFO L225 Difference]: With dead ends: 252 [2022-11-20 10:34:08,343 INFO L226 Difference]: Without dead ends: 250 [2022-11-20 10:34:08,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 244 SyntacticMatches, 25 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11474 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=4178, Invalid=28042, Unknown=0, NotChecked=0, Total=32220 [2022-11-20 10:34:08,346 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1142 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 2016 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 1198 SdHoareTripleChecker+Invalid, 3183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 2016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 777 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:08,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1142 Valid, 1198 Invalid, 3183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 2016 Invalid, 0 Unknown, 777 Unchecked, 2.1s Time] [2022-11-20 10:34:08,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-11-20 10:34:08,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 189. [2022-11-20 10:34:08,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0372340425531914) internal successors, (195), 188 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:08,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 195 transitions. [2022-11-20 10:34:08,438 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 195 transitions. Word has length 116 [2022-11-20 10:34:08,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:08,438 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 195 transitions. [2022-11-20 10:34:08,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.9302325581395348) internal successors, (338), 86 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 10:34:08,439 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 195 transitions. [2022-11-20 10:34:08,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-20 10:34:08,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:08,440 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:08,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:08,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-20 10:34:08,650 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:34:08,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:08,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1678830778, now seen corresponding path program 22 times [2022-11-20 10:34:08,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:34:08,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706136127] [2022-11-20 10:34:08,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:08,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:34:08,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 43 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:12,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:34:12,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706136127] [2022-11-20 10:34:12,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706136127] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:34:12,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572493074] [2022-11-20 10:34:12,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:34:12,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:12,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:34:12,618 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:34:12,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 10:34:12,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:34:12,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:34:12,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 129 conjunts are in the unsatisfiable core [2022-11-20 10:34:12,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:12,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:34:12,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:34:12,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:34:12,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:34:12,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:34:12,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:34:12,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:34:12,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:34:12,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:34:12,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:34:13,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:34:13,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:34:13,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:34:13,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:34:13,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:34:13,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:34:13,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:34:13,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:34:13,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:34:13,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:34:13,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:34:13,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:34:13,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:34:13,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:34:13,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:34:13,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:34:13,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:34:13,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 10:34:14,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-20 10:34:14,162 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 43 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:14,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 84 proven. 743 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:17,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572493074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:17,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:34:17,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 36, 37] total 57 [2022-11-20 10:34:17,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293274151] [2022-11-20 10:34:17,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:17,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-20 10:34:17,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:34:17,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-20 10:34:17,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=2699, Unknown=0, NotChecked=0, Total=3192 [2022-11-20 10:34:17,136 INFO L87 Difference]: Start difference. First operand 189 states and 195 transitions. Second operand has 57 states, 57 states have (on average 4.333333333333333) internal successors, (247), 57 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:29,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:29,202 INFO L93 Difference]: Finished difference Result 267 states and 274 transitions. [2022-11-20 10:34:29,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-11-20 10:34:29,203 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 4.333333333333333) internal successors, (247), 57 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2022-11-20 10:34:29,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:29,205 INFO L225 Difference]: With dead ends: 267 [2022-11-20 10:34:29,205 INFO L226 Difference]: Without dead ends: 265 [2022-11-20 10:34:29,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 236 SyntacticMatches, 29 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8722 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=4794, Invalid=20646, Unknown=0, NotChecked=0, Total=25440 [2022-11-20 10:34:29,208 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 663 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 2255 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 2471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 2255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:29,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 856 Invalid, 2471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 2255 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-20 10:34:29,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-11-20 10:34:29,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 189. [2022-11-20 10:34:29,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0372340425531914) internal successors, (195), 188 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:29,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 195 transitions. [2022-11-20 10:34:29,300 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 195 transitions. Word has length 124 [2022-11-20 10:34:29,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:29,300 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 195 transitions. [2022-11-20 10:34:29,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 4.333333333333333) internal successors, (247), 57 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:29,300 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 195 transitions. [2022-11-20 10:34:29,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-20 10:34:29,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:29,301 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:29,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:29,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-20 10:34:29,501 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:34:29,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:29,502 INFO L85 PathProgramCache]: Analyzing trace with hash -321118800, now seen corresponding path program 23 times [2022-11-20 10:34:29,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:34:29,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131566719] [2022-11-20 10:34:29,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:29,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:34:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:30,037 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 393 proven. 492 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:30,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:34:30,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131566719] [2022-11-20 10:34:30,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131566719] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:34:30,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308714530] [2022-11-20 10:34:30,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:34:30,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:30,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:34:30,041 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:34:30,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 10:34:31,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-11-20 10:34:31,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:34:31,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-20 10:34:31,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 450 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:32,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:32,996 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 493 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:32,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308714530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:32,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:34:32,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 34, 34] total 51 [2022-11-20 10:34:32,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196380211] [2022-11-20 10:34:32,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:32,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-20 10:34:32,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:34:32,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-20 10:34:32,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1004, Invalid=1546, Unknown=0, NotChecked=0, Total=2550 [2022-11-20 10:34:32,998 INFO L87 Difference]: Start difference. First operand 189 states and 195 transitions. Second operand has 51 states, 51 states have (on average 4.980392156862745) internal successors, (254), 51 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 10:34:33,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:33,492 INFO L93 Difference]: Finished difference Result 338 states and 349 transitions. [2022-11-20 10:34:33,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-20 10:34:33,492 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.980392156862745) internal successors, (254), 51 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) Word has length 128 [2022-11-20 10:34:33,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:33,493 INFO L225 Difference]: With dead ends: 338 [2022-11-20 10:34:33,494 INFO L226 Difference]: Without dead ends: 143 [2022-11-20 10:34:33,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 222 SyntacticMatches, 17 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1076, Invalid=1680, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 10:34:33,495 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 60 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:33,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 202 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:34:33,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-20 10:34:33,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2022-11-20 10:34:33,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0357142857142858) internal successors, (145), 140 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 10:34:33,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 145 transitions. [2022-11-20 10:34:33,545 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 145 transitions. Word has length 128 [2022-11-20 10:34:33,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:33,546 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 145 transitions. [2022-11-20 10:34:33,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.980392156862745) internal successors, (254), 51 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 10:34:33,546 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 145 transitions. [2022-11-20 10:34:33,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-20 10:34:33,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:33,546 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:33,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:33,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-20 10:34:33,755 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:34:33,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:33,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1893103253, now seen corresponding path program 24 times [2022-11-20 10:34:33,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:34:33,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854992681] [2022-11-20 10:34:33,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:33,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:34:33,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:37,365 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 46 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:37,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:34:37,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854992681] [2022-11-20 10:34:37,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854992681] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:34:37,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064019788] [2022-11-20 10:34:37,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:34:37,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:37,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:34:37,368 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:34:37,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846ab8f4-b6fb-476e-94ff-68f755574d98/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 10:34:41,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-11-20 10:34:41,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:34:41,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 130 conjunts are in the unsatisfiable core [2022-11-20 10:34:41,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:41,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:34:41,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:34:41,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:34:41,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:34:41,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:34:41,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:34:41,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:34:41,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:34:41,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:34:41,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:34:41,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:34:41,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:34:41,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:34:41,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:34:41,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:34:41,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:34:41,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:34:42,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:34:42,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:34:42,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:34:42,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:34:42,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:34:42,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:34:42,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:34:42,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:34:42,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:34:42,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:34:42,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:34:42,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:34:42,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-20 10:34:45,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:34:45,825 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:34:45,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 12 [2022-11-20 10:34:45,888 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 435 proven. 511 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:45,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:55,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2022-11-20 10:34:55,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 86 [2022-11-20 10:34:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 357 proven. 589 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:55,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064019788] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:55,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:34:55,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41, 40] total 99 [2022-11-20 10:34:55,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019288563] [2022-11-20 10:34:55,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:55,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-11-20 10:34:55,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:34:55,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-11-20 10:34:55,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1524, Invalid=8178, Unknown=0, NotChecked=0, Total=9702 [2022-11-20 10:34:55,782 INFO L87 Difference]: Start difference. First operand 141 states and 145 transitions. Second operand has 99 states, 99 states have (on average 3.9292929292929295) internal successors, (389), 99 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)