./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa --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 c51b17720ce1dad8733576d816f307564aabdff8c7a86cf8d9848ed8571cafd2 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:47:32,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:47:32,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:47:32,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:47:32,442 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:47:32,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:47:32,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:47:32,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:47:32,449 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:47:32,450 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:47:32,451 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:47:32,452 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:47:32,453 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:47:32,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:47:32,455 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:47:32,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:47:32,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:47:32,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:47:32,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:47:32,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:47:32,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:47:32,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:47:32,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:47:32,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:47:32,472 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:47:32,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:47:32,473 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:47:32,474 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:47:32,475 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:47:32,476 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:47:32,476 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:47:32,477 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:47:32,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:47:32,479 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:47:32,480 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:47:32,480 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:47:32,481 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:47:32,481 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:47:32,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:47:32,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:47:32,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:47:32,484 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:47:32,502 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:47:32,502 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:47:32,503 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:47:32,503 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:47:32,503 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:47:32,503 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:47:32,504 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:47:32,504 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:47:32,504 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:47:32,504 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:47:32,505 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:47:32,505 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:47:32,505 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:47:32,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:47:32,505 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:47:32,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:47:32,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:47:32,506 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:47:32,506 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:47:32,506 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:47:32,506 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:47:32,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:47:32,506 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:47:32,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:47:32,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:47:32,507 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:47:32,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:47:32,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:47:32,507 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:47:32,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:47:32,508 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:47:32,508 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:47:32,508 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:47:32,508 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:47:32,508 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_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c51b17720ce1dad8733576d816f307564aabdff8c7a86cf8d9848ed8571cafd2 [2021-12-06 18:47:32,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:47:32,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:47:32,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:47:32,745 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:47:32,745 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:47:32,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c [2021-12-06 18:47:32,788 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/data/f7285684e/14e0332607cb4f13a8c0fd71647ee851/FLAGb7726d7cc [2021-12-06 18:47:33,142 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:47:33,142 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c [2021-12-06 18:47:33,147 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/data/f7285684e/14e0332607cb4f13a8c0fd71647ee851/FLAGb7726d7cc [2021-12-06 18:47:33,156 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/data/f7285684e/14e0332607cb4f13a8c0fd71647ee851 [2021-12-06 18:47:33,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:47:33,159 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:47:33,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:47:33,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:47:33,162 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:47:33,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:47:33" (1/1) ... [2021-12-06 18:47:33,163 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10805cd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:47:33, skipping insertion in model container [2021-12-06 18:47:33,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:47:33" (1/1) ... [2021-12-06 18:47:33,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:47:33,177 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:47:33,294 WARN L230 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_503ba1f1-768e-4f6f-b601-5426046eb533/sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c[414,427] [2021-12-06 18:47:33,307 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:47:33,314 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:47:33,326 WARN L230 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_503ba1f1-768e-4f6f-b601-5426046eb533/sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c[414,427] [2021-12-06 18:47:33,331 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:47:33,344 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:47:33,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:47:33 WrapperNode [2021-12-06 18:47:33,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:47:33,346 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:47:33,346 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:47:33,346 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:47:33,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:47:33" (1/1) ... [2021-12-06 18:47:33,357 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:47:33" (1/1) ... [2021-12-06 18:47:33,371 INFO L137 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 51 [2021-12-06 18:47:33,371 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:47:33,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:47:33,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:47:33,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:47:33,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:47:33" (1/1) ... [2021-12-06 18:47:33,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:47:33" (1/1) ... [2021-12-06 18:47:33,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:47:33" (1/1) ... [2021-12-06 18:47:33,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:47:33" (1/1) ... [2021-12-06 18:47:33,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:47:33" (1/1) ... [2021-12-06 18:47:33,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:47:33" (1/1) ... [2021-12-06 18:47:33,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:47:33" (1/1) ... [2021-12-06 18:47:33,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:47:33,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:47:33,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:47:33,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:47:33,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:47:33" (1/1) ... [2021-12-06 18:47:33,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:47:33,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:47:33,419 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:47:33,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:47:33,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:47:33,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:47:33,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 18:47:33,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 18:47:33,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:47:33,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:47:33,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 18:47:33,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 18:47:33,506 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:47:33,507 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:47:33,581 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:47:33,585 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:47:33,585 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 18:47:33,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:47:33 BoogieIcfgContainer [2021-12-06 18:47:33,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:47:33,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:47:33,590 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:47:33,592 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:47:33,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:47:33" (1/3) ... [2021-12-06 18:47:33,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@984dfce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:47:33, skipping insertion in model container [2021-12-06 18:47:33,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:47:33" (2/3) ... [2021-12-06 18:47:33,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@984dfce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:47:33, skipping insertion in model container [2021-12-06 18:47:33,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:47:33" (3/3) ... [2021-12-06 18:47:33,595 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind.c [2021-12-06 18:47:33,601 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:47:33,601 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:47:33,638 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:47:33,644 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 18:47:33,644 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 18:47:33,654 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 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) [2021-12-06 18:47:33,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 18:47:33,659 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:33,660 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:47:33,661 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:33,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:33,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1818270042, now seen corresponding path program 1 times [2021-12-06 18:47:33,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:33,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473885342] [2021-12-06 18:47:33,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:33,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:33,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:33,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473885342] [2021-12-06 18:47:33,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473885342] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:47:33,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:47:33,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:47:33,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912446302] [2021-12-06 18:47:33,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:47:33,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 18:47:33,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:33,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 18:47:33,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:47:33,850 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 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) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:33,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:33,864 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2021-12-06 18:47:33,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 18:47:33,866 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 18:47:33,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:33,874 INFO L225 Difference]: With dead ends: 27 [2021-12-06 18:47:33,874 INFO L226 Difference]: Without dead ends: 12 [2021-12-06 18:47:33,877 INFO L932 BasicCegarLoop]: 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 [2021-12-06 18:47:33,881 INFO L933 BasicCegarLoop]: 18 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, 18 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 [2021-12-06 18:47:33,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:47:33,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-06 18:47:33,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-12-06 18:47:33,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:33,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-12-06 18:47:33,912 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2021-12-06 18:47:33,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:33,912 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-12-06 18:47:33,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:33,912 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-12-06 18:47:33,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 18:47:33,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:33,913 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:47:33,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:47:33,914 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:33,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:33,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1808111311, now seen corresponding path program 1 times [2021-12-06 18:47:33,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:33,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794109417] [2021-12-06 18:47:33,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:33,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:33,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:33,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794109417] [2021-12-06 18:47:33,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794109417] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:47:33,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:47:33,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:47:33,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431457159] [2021-12-06 18:47:33,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:47:33,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:47:33,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:33,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:47:33,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:47:33,983 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:34,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:34,012 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-12-06 18:47:34,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:47:34,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 18:47:34,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:34,014 INFO L225 Difference]: With dead ends: 29 [2021-12-06 18:47:34,014 INFO L226 Difference]: Without dead ends: 22 [2021-12-06 18:47:34,014 INFO L932 BasicCegarLoop]: 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 [2021-12-06 18:47:34,016 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:34,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 15 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:47:34,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-06 18:47:34,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 13. [2021-12-06 18:47:34,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:34,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-12-06 18:47:34,022 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2021-12-06 18:47:34,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:34,022 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-12-06 18:47:34,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:34,023 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-12-06 18:47:34,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 18:47:34,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:34,023 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:47:34,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 18:47:34,024 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:34,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:34,025 INFO L85 PathProgramCache]: Analyzing trace with hash 266504688, now seen corresponding path program 1 times [2021-12-06 18:47:34,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:34,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787096007] [2021-12-06 18:47:34,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:34,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:34,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:34,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:34,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787096007] [2021-12-06 18:47:34,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787096007] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:47:34,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:47:34,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:47:34,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688806486] [2021-12-06 18:47:34,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:47:34,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:47:34,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:34,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:47:34,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:47:34,075 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-12-06 18:47:34,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:34,096 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-12-06 18:47:34,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:47:34,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 [2021-12-06 18:47:34,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:34,097 INFO L225 Difference]: With dead ends: 23 [2021-12-06 18:47:34,097 INFO L226 Difference]: Without dead ends: 15 [2021-12-06 18:47:34,097 INFO L932 BasicCegarLoop]: 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 [2021-12-06 18:47:34,099 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:34,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:47:34,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-06 18:47:34,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-12-06 18:47:34,103 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) [2021-12-06 18:47:34,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-12-06 18:47:34,104 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2021-12-06 18:47:34,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:34,104 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-12-06 18:47:34,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-12-06 18:47:34,104 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-12-06 18:47:34,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 18:47:34,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:34,105 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:47:34,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 18:47:34,105 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:34,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:34,106 INFO L85 PathProgramCache]: Analyzing trace with hash 53732745, now seen corresponding path program 1 times [2021-12-06 18:47:34,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:34,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668612042] [2021-12-06 18:47:34,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:34,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:34,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:34,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:34,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668612042] [2021-12-06 18:47:34,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668612042] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:47:34,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073201574] [2021-12-06 18:47:34,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:34,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:47:34,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:47:34,168 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:47:34,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:47:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:34,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 18:47:34,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:47:34,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:34,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:47:34,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:34,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073201574] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:47:34,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:47:34,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2021-12-06 18:47:34,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023930104] [2021-12-06 18:47:34,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:47:34,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 18:47:34,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:34,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 18:47:34,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:47:34,323 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2021-12-06 18:47:34,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:34,389 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2021-12-06 18:47:34,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:47:34,389 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 18:47:34,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:34,390 INFO L225 Difference]: With dead ends: 45 [2021-12-06 18:47:34,390 INFO L226 Difference]: Without dead ends: 36 [2021-12-06 18:47:34,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:47:34,391 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 100 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:34,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 52 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:47:34,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-06 18:47:34,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2021-12-06 18:47:34,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:34,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-12-06 18:47:34,395 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 10 [2021-12-06 18:47:34,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:34,396 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-12-06 18:47:34,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2021-12-06 18:47:34,396 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-12-06 18:47:34,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 18:47:34,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:34,396 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:47:34,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:47:34,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:47:34,598 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:34,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:34,600 INFO L85 PathProgramCache]: Analyzing trace with hash -334334928, now seen corresponding path program 1 times [2021-12-06 18:47:34,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:34,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544794983] [2021-12-06 18:47:34,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:34,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:34,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:34,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:34,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544794983] [2021-12-06 18:47:34,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544794983] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:47:34,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025782338] [2021-12-06 18:47:34,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:34,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:47:34,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:47:34,823 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:47:34,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:47:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:34,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 18:47:34,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:47:34,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:47:34,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:47:34,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:34,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:47:35,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:47:35,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 28 [2021-12-06 18:47:35,104 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:35,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025782338] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:47:35,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:47:35,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 11 [2021-12-06 18:47:35,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075546889] [2021-12-06 18:47:35,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:47:35,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 18:47:35,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:35,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 18:47:35,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:47:35,107 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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) [2021-12-06 18:47:35,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:35,178 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-12-06 18:47:35,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 18:47:35,178 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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) Word has length 14 [2021-12-06 18:47:35,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:35,179 INFO L225 Difference]: With dead ends: 37 [2021-12-06 18:47:35,179 INFO L226 Difference]: Without dead ends: 35 [2021-12-06 18:47:35,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:47:35,180 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:35,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 63 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:47:35,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-06 18:47:35,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2021-12-06 18:47:35,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:35,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-12-06 18:47:35,186 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2021-12-06 18:47:35,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:35,186 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-12-06 18:47:35,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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) [2021-12-06 18:47:35,186 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-12-06 18:47:35,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 18:47:35,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:35,187 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:47:35,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:47:35,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:47:35,389 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:35,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:35,391 INFO L85 PathProgramCache]: Analyzing trace with hash -768933834, now seen corresponding path program 2 times [2021-12-06 18:47:35,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:35,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861014375] [2021-12-06 18:47:35,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:35,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:35,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:35,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861014375] [2021-12-06 18:47:35,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861014375] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:47:35,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980148933] [2021-12-06 18:47:35,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:47:35,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:47:35,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:47:35,543 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:47:35,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:47:35,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:47:35,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:47:35,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 18:47:35,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:47:35,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:47:35,674 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:47:35,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2021-12-06 18:47:35,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:47:35,734 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:35,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:47:37,830 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_21| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_21| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_48 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_21| 4)) v_ArrVal_48) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 4)))))) is different from false [2021-12-06 18:47:37,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:47:37,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 82 treesize of output 78 [2021-12-06 18:47:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-06 18:47:37,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980148933] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:47:37,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:47:37,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-12-06 18:47:37,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050728743] [2021-12-06 18:47:37,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:47:37,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 18:47:37,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:37,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 18:47:37,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=254, Unknown=1, NotChecked=32, Total=342 [2021-12-06 18:47:37,950 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:39,974 WARN L838 $PredicateComparison]: unable to prove that (and (<= 1 |c_ULTIMATE.start_main_~i~0#1|) (= |c_ULTIMATE.start_main_~i~0#1| 1) (<= 0 |c_ULTIMATE.start_main_~j~0#1|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4))) 0) (<= |c_ULTIMATE.start_main_~i~0#1| 1) (forall ((|v_ULTIMATE.start_main_~i~0#1_21| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_21| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_48 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_21| 4)) v_ArrVal_48) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 4))))))) is different from false [2021-12-06 18:47:40,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:40,079 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-12-06 18:47:40,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:47:40,079 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-06 18:47:40,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:40,080 INFO L225 Difference]: With dead ends: 43 [2021-12-06 18:47:40,081 INFO L226 Difference]: Without dead ends: 41 [2021-12-06 18:47:40,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=115, Invalid=443, Unknown=2, NotChecked=90, Total=650 [2021-12-06 18:47:40,082 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 58 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:40,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 79 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 104 Invalid, 0 Unknown, 50 Unchecked, 0.0s Time] [2021-12-06 18:47:40,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-06 18:47:40,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2021-12-06 18:47:40,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:40,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-12-06 18:47:40,088 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2021-12-06 18:47:40,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:40,088 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-12-06 18:47:40,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:40,089 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-12-06 18:47:40,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 18:47:40,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:40,090 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:47:40,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:47:40,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:47:40,291 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:40,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:40,292 INFO L85 PathProgramCache]: Analyzing trace with hash 20881638, now seen corresponding path program 1 times [2021-12-06 18:47:40,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:40,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612789996] [2021-12-06 18:47:40,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:40,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:40,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:40,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612789996] [2021-12-06 18:47:40,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612789996] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:47:40,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687779510] [2021-12-06 18:47:40,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:40,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:47:40,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:47:40,357 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:47:40,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:47:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:40,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 18:47:40,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:47:40,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:40,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:47:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:40,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687779510] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:47:40,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:47:40,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-06 18:47:40,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431118053] [2021-12-06 18:47:40,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:47:40,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 18:47:40,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:40,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 18:47:40,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:47:40,466 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:40,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:40,492 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-12-06 18:47:40,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:47:40,492 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 18:47:40,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:40,492 INFO L225 Difference]: With dead ends: 38 [2021-12-06 18:47:40,493 INFO L226 Difference]: Without dead ends: 26 [2021-12-06 18:47:40,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:47:40,493 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:40,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 40 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:47:40,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-06 18:47:40,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-06 18:47:40,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:40,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-12-06 18:47:40,497 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2021-12-06 18:47:40,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:40,497 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-12-06 18:47:40,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:40,497 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-12-06 18:47:40,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 18:47:40,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:40,498 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:47:40,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:47:40,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:47:40,699 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:40,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:40,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1429725775, now seen corresponding path program 2 times [2021-12-06 18:47:40,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:40,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231112116] [2021-12-06 18:47:40,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:40,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:40,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:40,745 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:40,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:40,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231112116] [2021-12-06 18:47:40,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231112116] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:47:40,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016671149] [2021-12-06 18:47:40,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:47:40,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:47:40,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:47:40,747 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:47:40,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:47:40,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:47:40,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:47:40,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 18:47:40,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:47:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:40,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:47:40,899 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:40,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016671149] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:47:40,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:47:40,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2021-12-06 18:47:40,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442141779] [2021-12-06 18:47:40,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:47:40,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 18:47:40,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:40,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 18:47:40,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2021-12-06 18:47:40,901 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:41,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:41,008 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2021-12-06 18:47:41,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 18:47:41,008 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 18:47:41,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:41,009 INFO L225 Difference]: With dead ends: 98 [2021-12-06 18:47:41,009 INFO L226 Difference]: Without dead ends: 91 [2021-12-06 18:47:41,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2021-12-06 18:47:41,011 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 234 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:41,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 102 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:47:41,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-06 18:47:41,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 43. [2021-12-06 18:47:41,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:41,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2021-12-06 18:47:41,018 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 19 [2021-12-06 18:47:41,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:41,018 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-12-06 18:47:41,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:41,019 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2021-12-06 18:47:41,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 18:47:41,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:41,019 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:47:41,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 18:47:41,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:47:41,220 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:41,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:41,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1421454960, now seen corresponding path program 3 times [2021-12-06 18:47:41,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:41,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19452078] [2021-12-06 18:47:41,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:41,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:41,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:41,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:41,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19452078] [2021-12-06 18:47:41,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19452078] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:47:41,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745694113] [2021-12-06 18:47:41,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:47:41,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:47:41,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:47:41,438 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:47:41,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:47:41,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 18:47:41,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:47:41,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 18:47:41,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:47:41,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:47:41,545 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:47:41,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2021-12-06 18:47:41,576 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:47:41,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2021-12-06 18:47:41,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:47:41,621 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:41,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:47:41,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 18 [2021-12-06 18:47:41,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 32 [2021-12-06 18:47:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:47:41,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745694113] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:47:41,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:47:41,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2021-12-06 18:47:41,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167336435] [2021-12-06 18:47:41,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:47:41,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 18:47:41,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:41,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 18:47:41,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:47:41,777 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:41,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:41,867 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-12-06 18:47:41,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 18:47:41,867 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 [2021-12-06 18:47:41,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:41,868 INFO L225 Difference]: With dead ends: 50 [2021-12-06 18:47:41,868 INFO L226 Difference]: Without dead ends: 48 [2021-12-06 18:47:41,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-12-06 18:47:41,869 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:41,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 41 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:47:41,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-06 18:47:41,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2021-12-06 18:47:41,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 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) [2021-12-06 18:47:41,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-12-06 18:47:41,874 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 20 [2021-12-06 18:47:41,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:41,874 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-12-06 18:47:41,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:41,874 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-12-06 18:47:41,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 18:47:41,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:41,875 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:47:41,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 18:47:42,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:47:42,076 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:42,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:42,076 INFO L85 PathProgramCache]: Analyzing trace with hash -796542484, now seen corresponding path program 2 times [2021-12-06 18:47:42,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:42,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802697767] [2021-12-06 18:47:42,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:42,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:42,181 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:42,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:42,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802697767] [2021-12-06 18:47:42,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802697767] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:47:42,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968701610] [2021-12-06 18:47:42,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:47:42,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:47:42,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:47:42,182 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:47:42,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 18:47:42,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:47:42,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:47:42,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 18:47:42,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:47:42,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:47:42,389 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:47:42,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 10 [2021-12-06 18:47:42,406 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:42,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:47:42,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 16 [2021-12-06 18:47:42,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 38 treesize of output 32 [2021-12-06 18:47:42,718 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:42,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968701610] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:47:42,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:47:42,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 26 [2021-12-06 18:47:42,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111970830] [2021-12-06 18:47:42,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:47:42,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 18:47:42,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:42,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 18:47:42,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2021-12-06 18:47:42,720 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:42,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:42,794 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-12-06 18:47:42,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 18:47:42,794 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-06 18:47:42,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:42,794 INFO L225 Difference]: With dead ends: 53 [2021-12-06 18:47:42,795 INFO L226 Difference]: Without dead ends: 42 [2021-12-06 18:47:42,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-12-06 18:47:42,796 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:42,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 63 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 79 Invalid, 0 Unknown, 31 Unchecked, 0.0s Time] [2021-12-06 18:47:42,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-06 18:47:42,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-06 18:47:42,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:42,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-12-06 18:47:42,799 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 21 [2021-12-06 18:47:42,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:42,800 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-12-06 18:47:42,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:42,800 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-12-06 18:47:42,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 18:47:42,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:42,800 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:47:42,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 18:47:43,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 18:47:43,002 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:43,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:43,003 INFO L85 PathProgramCache]: Analyzing trace with hash -213992666, now seen corresponding path program 3 times [2021-12-06 18:47:43,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:43,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834575963] [2021-12-06 18:47:43,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:43,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:43,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:43,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:43,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834575963] [2021-12-06 18:47:43,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834575963] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:47:43,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304552005] [2021-12-06 18:47:43,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:47:43,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:47:43,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:47:43,237 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:47:43,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 18:47:43,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 18:47:43,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:47:43,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 18:47:43,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:47:43,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:47:43,380 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:47:43,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2021-12-06 18:47:43,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:47:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:43,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:48:15,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:48:15,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 82 treesize of output 78 [2021-12-06 18:48:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:48:15,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304552005] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:48:15,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:48:15,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2021-12-06 18:48:15,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338155017] [2021-12-06 18:48:15,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:48:15,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 18:48:15,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:48:15,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 18:48:15,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=752, Unknown=13, NotChecked=0, Total=870 [2021-12-06 18:48:15,710 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:15,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:48:15,951 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2021-12-06 18:48:15,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:48:15,952 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-06 18:48:15,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:48:15,952 INFO L225 Difference]: With dead ends: 51 [2021-12-06 18:48:15,952 INFO L226 Difference]: Without dead ends: 49 [2021-12-06 18:48:15,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 32.4s TimeCoverageRelationStatistics Valid=210, Invalid=1183, Unknown=13, NotChecked=0, Total=1406 [2021-12-06 18:48:15,953 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 48 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:48:15,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 105 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 315 Invalid, 0 Unknown, 2 Unchecked, 0.1s Time] [2021-12-06 18:48:15,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-06 18:48:15,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2021-12-06 18:48:15,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 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) [2021-12-06 18:48:15,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-12-06 18:48:15,957 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 24 [2021-12-06 18:48:15,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:48:15,958 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-12-06 18:48:15,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:15,958 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-12-06 18:48:15,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 18:48:15,958 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:48:15,959 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 18:48:15,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 18:48:16,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:48:16,160 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:48:16,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:48:16,162 INFO L85 PathProgramCache]: Analyzing trace with hash 2053274844, now seen corresponding path program 4 times [2021-12-06 18:48:16,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:48:16,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300141483] [2021-12-06 18:48:16,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:48:16,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:48:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:48:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:48:16,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:48:16,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300141483] [2021-12-06 18:48:16,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300141483] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:48:16,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646164680] [2021-12-06 18:48:16,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:48:16,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:48:16,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:48:16,415 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:48:16,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 18:48:16,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:48:16,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:48:16,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 18:48:16,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:48:16,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2021-12-06 18:48:16,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:48:16,637 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:48:16,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:48:16,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:48:16,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 28 [2021-12-06 18:48:16,859 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:48:16,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646164680] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:48:16,859 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:48:16,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 36 [2021-12-06 18:48:16,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291655478] [2021-12-06 18:48:16,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:48:16,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 18:48:16,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:48:16,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 18:48:16,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 18:48:16,861 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:17,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:48:17,127 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2021-12-06 18:48:17,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 18:48:17,127 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-06 18:48:17,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:48:17,128 INFO L225 Difference]: With dead ends: 62 [2021-12-06 18:48:17,128 INFO L226 Difference]: Without dead ends: 46 [2021-12-06 18:48:17,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=1608, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 18:48:17,129 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:48:17,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 143 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:48:17,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-06 18:48:17,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-06 18:48:17,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:17,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-12-06 18:48:17,133 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 28 [2021-12-06 18:48:17,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:48:17,133 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-12-06 18:48:17,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:17,133 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-12-06 18:48:17,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 18:48:17,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:48:17,134 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 18:48:17,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 18:48:17,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 18:48:17,335 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:48:17,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:48:17,335 INFO L85 PathProgramCache]: Analyzing trace with hash -272988574, now seen corresponding path program 5 times [2021-12-06 18:48:17,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:48:17,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908226208] [2021-12-06 18:48:17,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:48:17,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:48:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:48:17,542 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:48:17,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:48:17,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908226208] [2021-12-06 18:48:17,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908226208] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:48:17,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394357029] [2021-12-06 18:48:17,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:48:17,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:48:17,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:48:17,543 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:48:17,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 18:48:17,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-06 18:48:17,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:48:17,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 18:48:17,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:48:17,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:48:17,738 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:48:17,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2021-12-06 18:48:17,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:48:17,838 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:48:17,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:48:19,946 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_74| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_74| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_198 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_74| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) v_ArrVal_198) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 12)))))) is different from false [2021-12-06 18:48:19,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:48:19,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 82 treesize of output 78 [2021-12-06 18:48:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-12-06 18:48:20,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394357029] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:48:20,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:48:20,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 41 [2021-12-06 18:48:20,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534728637] [2021-12-06 18:48:20,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:48:20,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 18:48:20,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:48:20,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 18:48:20,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1409, Unknown=1, NotChecked=76, Total=1640 [2021-12-06 18:48:20,138 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 41 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:22,206 WARN L838 $PredicateComparison]: unable to prove that (and (<= 3 |c_ULTIMATE.start_main_~j~0#1|) (<= 3 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_74| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_74| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_198 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_74| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) v_ArrVal_198) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 12)))))) (= |c_ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)))) (<= (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* 4 |c_ULTIMATE.start_main_~i~0#1|)) 12)) is different from false [2021-12-06 18:48:22,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:48:22,455 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-12-06 18:48:22,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 18:48:22,456 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 41 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-06 18:48:22,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:48:22,456 INFO L225 Difference]: With dead ends: 55 [2021-12-06 18:48:22,456 INFO L226 Difference]: Without dead ends: 53 [2021-12-06 18:48:22,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=271, Invalid=2087, Unknown=2, NotChecked=190, Total=2550 [2021-12-06 18:48:22,458 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:48:22,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 137 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 372 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2021-12-06 18:48:22,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-06 18:48:22,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2021-12-06 18:48:22,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:22,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2021-12-06 18:48:22,464 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 31 [2021-12-06 18:48:22,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:48:22,464 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2021-12-06 18:48:22,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 41 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:22,465 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2021-12-06 18:48:22,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 18:48:22,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:48:22,466 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-06 18:48:22,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 18:48:22,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 18:48:22,667 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:48:22,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:48:22,668 INFO L85 PathProgramCache]: Analyzing trace with hash -246527464, now seen corresponding path program 6 times [2021-12-06 18:48:22,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:48:22,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097759086] [2021-12-06 18:48:22,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:48:22,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:48:22,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:48:22,885 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:48:22,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:48:22,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097759086] [2021-12-06 18:48:22,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097759086] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:48:22,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068597685] [2021-12-06 18:48:22,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:48:22,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:48:22,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:48:22,886 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:48:22,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 18:48:22,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-06 18:48:22,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:48:22,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 18:48:22,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:48:23,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:48:23,298 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:48:23,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 10 [2021-12-06 18:48:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:48:23,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:48:23,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 16 [2021-12-06 18:48:23,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 38 treesize of output 32 [2021-12-06 18:48:23,817 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:48:23,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068597685] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:48:23,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:48:23,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 44 [2021-12-06 18:48:23,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175759211] [2021-12-06 18:48:23,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:48:23,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 18:48:23,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:48:23,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 18:48:23,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=1564, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 18:48:23,819 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:23,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:48:23,967 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2021-12-06 18:48:23,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 18:48:23,967 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-06 18:48:23,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:48:23,968 INFO L225 Difference]: With dead ends: 67 [2021-12-06 18:48:23,968 INFO L226 Difference]: Without dead ends: 50 [2021-12-06 18:48:23,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=406, Invalid=2044, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 18:48:23,969 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:48:23,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 151 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 201 Invalid, 0 Unknown, 82 Unchecked, 0.1s Time] [2021-12-06 18:48:23,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-06 18:48:23,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-12-06 18:48:23,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:23,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2021-12-06 18:48:23,973 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 35 [2021-12-06 18:48:23,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:48:23,973 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2021-12-06 18:48:23,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:23,973 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2021-12-06 18:48:23,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-06 18:48:23,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:48:23,974 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-06 18:48:23,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-06 18:48:24,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:48:24,176 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:48:24,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:48:24,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1821925934, now seen corresponding path program 7 times [2021-12-06 18:48:24,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:48:24,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230062430] [2021-12-06 18:48:24,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:48:24,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:48:24,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:48:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:48:24,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:48:24,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230062430] [2021-12-06 18:48:24,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230062430] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:48:24,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534312902] [2021-12-06 18:48:24,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:48:24,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:48:24,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:48:24,373 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:48:24,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 18:48:24,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:48:24,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 18:48:24,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:48:24,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:48:24,512 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:48:24,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 26 [2021-12-06 18:48:24,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:48:24,631 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:48:24,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:48:26,760 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_96| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_96| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_255 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_96| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) v_ArrVal_255) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 16)))))) is different from false [2021-12-06 18:48:26,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:48:26,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 186 treesize of output 178 [2021-12-06 18:48:27,002 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-12-06 18:48:27,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534312902] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:48:27,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:48:27,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 39 [2021-12-06 18:48:27,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257254123] [2021-12-06 18:48:27,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:48:27,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 18:48:27,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:48:27,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 18:48:27,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1282, Unknown=1, NotChecked=72, Total=1482 [2021-12-06 18:48:27,004 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:29,074 WARN L838 $PredicateComparison]: unable to prove that (and (<= 6 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)))) (<= |c_ULTIMATE.start_main_~i~0#1| 4) (<= 6 |c_ULTIMATE.start_main_~j~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_96| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_96| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_255 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_96| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) v_ArrVal_255) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 16)))))) (<= 4 |c_ULTIMATE.start_main_~i~0#1|)) is different from false [2021-12-06 18:48:29,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:48:29,208 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2021-12-06 18:48:29,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 18:48:29,208 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-06 18:48:29,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:48:29,209 INFO L225 Difference]: With dead ends: 76 [2021-12-06 18:48:29,209 INFO L226 Difference]: Without dead ends: 74 [2021-12-06 18:48:29,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=188, Invalid=1798, Unknown=2, NotChecked=174, Total=2162 [2021-12-06 18:48:29,210 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:48:29,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 213 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 358 Invalid, 0 Unknown, 70 Unchecked, 0.1s Time] [2021-12-06 18:48:29,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-06 18:48:29,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2021-12-06 18:48:29,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 54 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:29,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2021-12-06 18:48:29,215 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 38 [2021-12-06 18:48:29,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:48:29,215 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2021-12-06 18:48:29,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:29,215 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2021-12-06 18:48:29,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 18:48:29,216 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:48:29,216 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-06 18:48:29,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 18:48:29,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 18:48:29,417 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:48:29,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:48:29,419 INFO L85 PathProgramCache]: Analyzing trace with hash 884864984, now seen corresponding path program 8 times [2021-12-06 18:48:29,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:48:29,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097376974] [2021-12-06 18:48:29,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:48:29,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:48:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:48:29,653 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:48:29,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:48:29,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097376974] [2021-12-06 18:48:29,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097376974] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:48:29,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272822777] [2021-12-06 18:48:29,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:48:29,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:48:29,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:48:29,654 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:48:29,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 18:48:29,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:48:29,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:48:29,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 18:48:29,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:48:29,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:48:29,789 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:48:29,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2021-12-06 18:48:29,813 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:48:29,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2021-12-06 18:48:29,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:48:29,903 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 2 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:48:29,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:48:32,022 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_109| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_109| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_293 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_109| 4)) v_ArrVal_293) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 16)))))) is different from false [2021-12-06 18:48:44,363 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_110| Int)) (or (forall ((v_ArrVal_293 Int) (v_ArrVal_291 Int) (|v_ULTIMATE.start_main_~i~0#1_109| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_109| (+ |v_ULTIMATE.start_main_~i~0#1_110| 1)) (<= 0 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_110| 4)) v_ArrVal_291) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_109| 4)) v_ArrVal_293) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 16))))) (< |v_ULTIMATE.start_main_~i~0#1_110| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-06 18:48:44,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 28 [2021-12-06 18:48:44,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 182 treesize of output 178 [2021-12-06 18:48:44,586 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 11 not checked. [2021-12-06 18:48:44,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272822777] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:48:44,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:48:44,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 42 [2021-12-06 18:48:44,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915315860] [2021-12-06 18:48:44,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:48:44,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 18:48:44,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:48:44,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 18:48:44,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1405, Unknown=21, NotChecked=154, Total=1722 [2021-12-06 18:48:44,588 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 42 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 42 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:46,676 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_110| Int)) (or (forall ((v_ArrVal_293 Int) (v_ArrVal_291 Int) (|v_ULTIMATE.start_main_~i~0#1_109| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_109| (+ |v_ULTIMATE.start_main_~i~0#1_110| 1)) (<= 0 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_110| 4)) v_ArrVal_291) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_109| 4)) v_ArrVal_293) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 16))))) (< |v_ULTIMATE.start_main_~i~0#1_110| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= 6 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)))) (<= |c_ULTIMATE.start_main_~i~0#1| 4) (<= 6 |c_ULTIMATE.start_main_~j~0#1|) (<= 4 |c_ULTIMATE.start_main_~i~0#1|)) is different from false [2021-12-06 18:48:48,692 WARN L838 $PredicateComparison]: unable to prove that (and (<= 5 |c_ULTIMATE.start_main_~i~0#1|) (<= 6 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 16))) (forall ((|v_ULTIMATE.start_main_~i~0#1_109| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_109| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_293 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_109| 4)) v_ArrVal_293) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 16))))))) is different from false [2021-12-06 18:48:50,709 WARN L838 $PredicateComparison]: unable to prove that (and (<= 6 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 16))) (forall ((|v_ULTIMATE.start_main_~i~0#1_109| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_109| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_293 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_109| 4)) v_ArrVal_293) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 16)))))) (<= 6 |c_ULTIMATE.start_main_~i~0#1|)) is different from false [2021-12-06 18:48:50,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:48:50,907 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2021-12-06 18:48:50,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 18:48:50,907 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 42 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-06 18:48:50,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:48:50,908 INFO L225 Difference]: With dead ends: 74 [2021-12-06 18:48:50,908 INFO L226 Difference]: Without dead ends: 72 [2021-12-06 18:48:50,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=280, Invalid=2166, Unknown=24, NotChecked=500, Total=2970 [2021-12-06 18:48:50,909 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:48:50,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 198 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 572 Invalid, 0 Unknown, 117 Unchecked, 0.2s Time] [2021-12-06 18:48:50,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-06 18:48:50,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 54. [2021-12-06 18:48:50,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 53 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:50,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2021-12-06 18:48:50,913 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 41 [2021-12-06 18:48:50,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:48:50,914 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2021-12-06 18:48:50,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 42 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:50,914 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2021-12-06 18:48:50,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 18:48:50,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:48:50,915 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-06 18:48:50,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 18:48:51,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 18:48:51,116 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:48:51,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:48:51,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1086466440, now seen corresponding path program 9 times [2021-12-06 18:48:51,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:48:51,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043403981] [2021-12-06 18:48:51,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:48:51,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:48:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:48:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:48:51,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:48:51,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043403981] [2021-12-06 18:48:51,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043403981] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:48:51,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210676732] [2021-12-06 18:48:51,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:48:51,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:48:51,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:48:51,340 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:48:51,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 18:48:51,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-06 18:48:51,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:48:51,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 18:48:51,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:48:51,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:48:51,521 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-06 18:48:51,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 31 [2021-12-06 18:48:53,231 INFO L354 Elim1Store]: treesize reduction 96, result has 6.8 percent of original size [2021-12-06 18:48:53,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 48 treesize of output 20 [2021-12-06 18:48:53,256 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 19 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:48:53,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:48:59,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 54 treesize of output 50 [2021-12-06 18:48:59,230 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-06 18:48:59,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 463 treesize of output 437 [2021-12-06 18:48:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:48:59,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210676732] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:48:59,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:48:59,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 19] total 50 [2021-12-06 18:48:59,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547536060] [2021-12-06 18:48:59,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:48:59,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 18:48:59,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:48:59,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 18:48:59,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=2151, Unknown=5, NotChecked=0, Total=2450 [2021-12-06 18:48:59,438 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 50 states, 50 states have (on average 2.14) internal successors, (107), 50 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:00,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:49:00,417 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2021-12-06 18:49:00,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 18:49:00,418 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.14) internal successors, (107), 50 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-06 18:49:00,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:49:00,418 INFO L225 Difference]: With dead ends: 78 [2021-12-06 18:49:00,418 INFO L226 Difference]: Without dead ends: 54 [2021-12-06 18:49:00,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=641, Invalid=5054, Unknown=5, NotChecked=0, Total=5700 [2021-12-06 18:49:00,420 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 44 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 238 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:49:00,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 253 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 189 Invalid, 0 Unknown, 238 Unchecked, 0.1s Time] [2021-12-06 18:49:00,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-06 18:49:00,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-12-06 18:49:00,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 53 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:00,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-12-06 18:49:00,424 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 42 [2021-12-06 18:49:00,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:49:00,424 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-12-06 18:49:00,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.14) internal successors, (107), 50 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:00,424 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-12-06 18:49:00,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 18:49:00,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:49:00,425 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-06 18:49:00,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 18:49:00,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 18:49:00,626 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:49:00,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:49:00,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1001394318, now seen corresponding path program 10 times [2021-12-06 18:49:00,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:49:00,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096057047] [2021-12-06 18:49:00,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:49:00,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:49:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:49:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:49:00,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:49:00,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096057047] [2021-12-06 18:49:00,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096057047] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:49:00,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75853849] [2021-12-06 18:49:00,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:49:00,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:49:00,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:49:00,880 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:49:00,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 18:49:00,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:49:00,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:49:00,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 18:49:00,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:49:00,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:49:01,024 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:49:01,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 26 [2021-12-06 18:49:01,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:49:01,151 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:49:01,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:49:03,295 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_136| Int)) (or (forall ((v_ArrVal_361 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_136| 4)) v_ArrVal_361) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 20)))) (< |v_ULTIMATE.start_main_~i~0#1_136| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-06 18:49:03,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:49:03,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 186 treesize of output 178 [2021-12-06 18:49:03,590 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-12-06 18:49:03,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75853849] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:49:03,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:49:03,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 46 [2021-12-06 18:49:03,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130591077] [2021-12-06 18:49:03,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:49:03,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 18:49:03,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:49:03,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 18:49:03,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1831, Unknown=1, NotChecked=86, Total=2070 [2021-12-06 18:49:03,592 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 46 states, 46 states have (on average 2.347826086956522) internal successors, (108), 46 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:05,720 WARN L838 $PredicateComparison]: unable to prove that (and (<= 10 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)))) (<= 5 |c_ULTIMATE.start_main_~i~0#1|) (<= 10 |c_ULTIMATE.start_main_~j~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_136| Int)) (or (forall ((v_ArrVal_361 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_136| 4)) v_ArrVal_361) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 20)))) (< |v_ULTIMATE.start_main_~i~0#1_136| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= |c_ULTIMATE.start_main_~i~0#1| 5)) is different from false [2021-12-06 18:49:05,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:49:05,931 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2021-12-06 18:49:05,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 18:49:05,932 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.347826086956522) internal successors, (108), 46 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-06 18:49:05,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:49:05,932 INFO L225 Difference]: With dead ends: 84 [2021-12-06 18:49:05,932 INFO L226 Difference]: Without dead ends: 82 [2021-12-06 18:49:05,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=223, Invalid=2539, Unknown=2, NotChecked=206, Total=2970 [2021-12-06 18:49:05,934 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:49:05,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 428 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 791 Invalid, 0 Unknown, 94 Unchecked, 0.2s Time] [2021-12-06 18:49:05,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-06 18:49:05,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 59. [2021-12-06 18:49:05,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 58 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:05,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2021-12-06 18:49:05,938 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 45 [2021-12-06 18:49:05,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:49:05,938 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2021-12-06 18:49:05,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.347826086956522) internal successors, (108), 46 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:05,938 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2021-12-06 18:49:05,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-06 18:49:05,939 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:49:05,939 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-06 18:49:05,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 18:49:06,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 18:49:06,141 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:49:06,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:49:06,142 INFO L85 PathProgramCache]: Analyzing trace with hash 648512456, now seen corresponding path program 11 times [2021-12-06 18:49:06,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:49:06,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359946524] [2021-12-06 18:49:06,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:49:06,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:49:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:49:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:49:06,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:49:06,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359946524] [2021-12-06 18:49:06,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359946524] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:49:06,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803842801] [2021-12-06 18:49:06,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:49:06,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:49:06,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:49:06,423 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:49:06,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 18:49:06,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-06 18:49:06,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:49:06,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 18:49:06,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:49:06,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:49:06,578 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:49:06,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2021-12-06 18:49:06,604 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:49:06,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2021-12-06 18:49:06,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:49:06,725 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 2 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:49:06,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:49:08,876 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_151| Int)) (or (forall ((v_ArrVal_403 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_151| 4)) v_ArrVal_403) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 20)))) (< |v_ULTIMATE.start_main_~i~0#1_151| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-06 18:49:23,281 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_152| Int)) (or (forall ((v_ArrVal_401 Int) (|v_ULTIMATE.start_main_~i~0#1_151| Int) (v_ArrVal_403 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_151| (+ |v_ULTIMATE.start_main_~i~0#1_152| 1)) (<= 0 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_152| 4)) v_ArrVal_401) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_151| 4)) v_ArrVal_403) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 20))))) (< |v_ULTIMATE.start_main_~i~0#1_152| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-06 18:49:23,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 28 [2021-12-06 18:49:23,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 182 treesize of output 178 [2021-12-06 18:49:23,596 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 13 not checked. [2021-12-06 18:49:23,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803842801] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:49:23,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:49:23,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 23] total 49 [2021-12-06 18:49:23,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351718367] [2021-12-06 18:49:23,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:49:23,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 18:49:23,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:49:23,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 18:49:23,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1978, Unknown=25, NotChecked=182, Total=2352 [2021-12-06 18:49:23,598 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 49 states, 49 states have (on average 2.326530612244898) internal successors, (114), 49 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:25,746 WARN L838 $PredicateComparison]: unable to prove that (and (<= 10 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)))) (<= 5 |c_ULTIMATE.start_main_~i~0#1|) (<= 10 |c_ULTIMATE.start_main_~j~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_152| Int)) (or (forall ((v_ArrVal_401 Int) (|v_ULTIMATE.start_main_~i~0#1_151| Int) (v_ArrVal_403 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_151| (+ |v_ULTIMATE.start_main_~i~0#1_152| 1)) (<= 0 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_152| 4)) v_ArrVal_401) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_151| 4)) v_ArrVal_403) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 20))))) (< |v_ULTIMATE.start_main_~i~0#1_152| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= |c_ULTIMATE.start_main_~i~0#1| 5)) is different from false [2021-12-06 18:49:27,770 WARN L838 $PredicateComparison]: unable to prove that (and (<= 10 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 20))) (forall ((|v_ULTIMATE.start_main_~i~0#1_151| Int)) (or (forall ((v_ArrVal_403 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_151| 4)) v_ArrVal_403) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 20)))) (< |v_ULTIMATE.start_main_~i~0#1_151| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= 6 |c_ULTIMATE.start_main_~i~0#1|)) is different from false [2021-12-06 18:49:29,792 WARN L838 $PredicateComparison]: unable to prove that (and (<= 7 |c_ULTIMATE.start_main_~i~0#1|) (<= 10 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 20))) (forall ((|v_ULTIMATE.start_main_~i~0#1_151| Int)) (or (forall ((v_ArrVal_403 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_151| 4)) v_ArrVal_403) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 20)))) (< |v_ULTIMATE.start_main_~i~0#1_151| (+ |c_ULTIMATE.start_main_~i~0#1| 1))))) is different from false [2021-12-06 18:49:30,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:49:30,082 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2021-12-06 18:49:30,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 18:49:30,083 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.326530612244898) internal successors, (114), 49 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-06 18:49:30,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:49:30,083 INFO L225 Difference]: With dead ends: 82 [2021-12-06 18:49:30,083 INFO L226 Difference]: Without dead ends: 80 [2021-12-06 18:49:30,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 65 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=332, Invalid=3082, Unknown=28, NotChecked=590, Total=4032 [2021-12-06 18:49:30,085 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 56 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:49:30,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 309 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 890 Invalid, 0 Unknown, 119 Unchecked, 0.3s Time] [2021-12-06 18:49:30,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-06 18:49:30,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 58. [2021-12-06 18:49:30,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.087719298245614) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:30,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2021-12-06 18:49:30,090 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 48 [2021-12-06 18:49:30,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:49:30,090 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2021-12-06 18:49:30,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.326530612244898) internal successors, (114), 49 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:30,090 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2021-12-06 18:49:30,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 18:49:30,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:49:30,090 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-12-06 18:49:30,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 18:49:30,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:49:30,292 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:49:30,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:49:30,293 INFO L85 PathProgramCache]: Analyzing trace with hash -707076540, now seen corresponding path program 12 times [2021-12-06 18:49:30,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:49:30,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741215374] [2021-12-06 18:49:30,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:49:30,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:49:30,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:49:30,554 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:49:30,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:49:30,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741215374] [2021-12-06 18:49:30,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741215374] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:49:30,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107455446] [2021-12-06 18:49:30,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:49:30,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:49:30,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:49:30,556 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:49:30,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 18:49:30,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-06 18:49:30,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:49:30,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 18:49:30,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:49:30,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:49:31,046 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:49:31,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 10 [2021-12-06 18:49:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 45 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:49:31,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:49:34,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 16 [2021-12-06 18:49:34,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 38 treesize of output 32 [2021-12-06 18:49:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 40 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:49:35,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107455446] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:49:35,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:49:35,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 54 [2021-12-06 18:49:35,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074351031] [2021-12-06 18:49:35,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:49:35,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-06 18:49:35,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:49:35,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-06 18:49:35,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2467, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 18:49:35,293 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 54 states, 54 states have (on average 2.3518518518518516) internal successors, (127), 54 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:35,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:49:35,586 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2021-12-06 18:49:35,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 18:49:35,587 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.3518518518518516) internal successors, (127), 54 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-06 18:49:35,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:49:35,587 INFO L225 Difference]: With dead ends: 86 [2021-12-06 18:49:35,587 INFO L226 Difference]: Without dead ends: 58 [2021-12-06 18:49:35,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=503, Invalid=3403, Unknown=0, NotChecked=0, Total=3906 [2021-12-06 18:49:35,589 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:49:35,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 265 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 388 Invalid, 0 Unknown, 123 Unchecked, 0.1s Time] [2021-12-06 18:49:35,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-06 18:49:35,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-12-06 18:49:35,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2021-12-06 18:49:35,595 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 49 [2021-12-06 18:49:35,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:49:35,596 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2021-12-06 18:49:35,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.3518518518518516) internal successors, (127), 54 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:35,596 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2021-12-06 18:49:35,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 18:49:35,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:49:35,596 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-12-06 18:49:35,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 18:49:35,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:49:35,798 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:49:35,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:49:35,800 INFO L85 PathProgramCache]: Analyzing trace with hash -988666754, now seen corresponding path program 13 times [2021-12-06 18:49:35,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:49:35,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805347881] [2021-12-06 18:49:35,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:49:35,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:49:35,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:49:36,121 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:49:36,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:49:36,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805347881] [2021-12-06 18:49:36,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805347881] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:49:36,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582213131] [2021-12-06 18:49:36,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:49:36,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:49:36,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:49:36,122 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:49:36,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 18:49:36,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:49:36,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 18:49:36,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:49:36,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:49:36,294 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:49:36,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 26 [2021-12-06 18:49:36,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:49:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:49:36,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:50:18,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:50:18,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 186 treesize of output 178 [2021-12-06 18:50:19,160 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:50:19,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582213131] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:50:19,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:50:19,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 53 [2021-12-06 18:50:19,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092080921] [2021-12-06 18:50:19,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:50:19,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-06 18:50:19,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:50:19,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-06 18:50:19,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2556, Unknown=20, NotChecked=0, Total=2756 [2021-12-06 18:50:19,162 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 53 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 53 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) [2021-12-06 18:50:23,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:50:23,667 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2021-12-06 18:50:23,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 18:50:23,667 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 53 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 52 [2021-12-06 18:50:23,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:50:23,669 INFO L225 Difference]: With dead ends: 92 [2021-12-06 18:50:23,669 INFO L226 Difference]: Without dead ends: 90 [2021-12-06 18:50:23,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 71 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 47.0s TimeCoverageRelationStatistics Valid=265, Invalid=3619, Unknown=22, NotChecked=0, Total=3906 [2021-12-06 18:50:23,671 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 66 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:50:23,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 556 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1072 Invalid, 0 Unknown, 35 Unchecked, 0.3s Time] [2021-12-06 18:50:23,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-06 18:50:23,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2021-12-06 18:50:23,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:23,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2021-12-06 18:50:23,676 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 52 [2021-12-06 18:50:23,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:50:23,677 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2021-12-06 18:50:23,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 53 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) [2021-12-06 18:50:23,677 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2021-12-06 18:50:23,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 18:50:23,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:50:23,677 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-12-06 18:50:23,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 18:50:23,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 18:50:23,879 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:50:23,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:50:23,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1771602940, now seen corresponding path program 14 times [2021-12-06 18:50:23,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:50:23,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111366643] [2021-12-06 18:50:23,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:50:23,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:50:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:50:24,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:50:24,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111366643] [2021-12-06 18:50:24,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111366643] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:50:24,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147841193] [2021-12-06 18:50:24,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:50:24,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:50:24,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:50:24,182 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:50:24,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 18:50:24,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:50:24,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:50:24,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 18:50:24,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:50:24,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:50:24,347 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:50:24,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2021-12-06 18:50:24,375 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:50:24,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2021-12-06 18:50:24,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:50:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 2 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:50:24,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:50:26,759 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_199| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_199| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_524 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_199| 4)) v_ArrVal_524) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 24)))))) is different from false [2021-12-06 18:50:47,018 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_200| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_200| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_522 Int) (|v_ULTIMATE.start_main_~i~0#1_199| Int) (v_ArrVal_524 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_199| (+ |v_ULTIMATE.start_main_~i~0#1_200| 1)) (<= 0 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_200| 4)) v_ArrVal_522) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_199| 4)) v_ArrVal_524) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 24))))))) is different from false [2021-12-06 18:50:47,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 28 [2021-12-06 18:50:47,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 182 treesize of output 178 [2021-12-06 18:50:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 15 not checked. [2021-12-06 18:50:47,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147841193] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:50:47,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:50:47,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 56 [2021-12-06 18:50:47,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790570595] [2021-12-06 18:50:47,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:50:47,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-06 18:50:47,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:50:47,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-06 18:50:47,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=2645, Unknown=33, NotChecked=210, Total=3080 [2021-12-06 18:50:47,450 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 56 states, 56 states have (on average 2.357142857142857) internal successors, (132), 56 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:49,670 WARN L838 $PredicateComparison]: unable to prove that (and (<= 15 |c_ULTIMATE.start_main_~j~0#1|) (<= |c_ULTIMATE.start_main_~i~0#1| 6) (forall ((|v_ULTIMATE.start_main_~i~0#1_200| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_200| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_522 Int) (|v_ULTIMATE.start_main_~i~0#1_199| Int) (v_ArrVal_524 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_199| (+ |v_ULTIMATE.start_main_~i~0#1_200| 1)) (<= 0 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_200| 4)) v_ArrVal_522) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_199| 4)) v_ArrVal_524) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 24))))))) (<= 15 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)))) (<= 6 |c_ULTIMATE.start_main_~i~0#1|)) is different from false [2021-12-06 18:50:51,697 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_199| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_199| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_524 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_199| 4)) v_ArrVal_524) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 24)))))) (<= 7 |c_ULTIMATE.start_main_~i~0#1|) (<= 15 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 24)))) is different from false [2021-12-06 18:50:52,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:50:52,094 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2021-12-06 18:50:52,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 18:50:52,094 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.357142857142857) internal successors, (132), 56 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-06 18:50:52,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:50:52,095 INFO L225 Difference]: With dead ends: 90 [2021-12-06 18:50:52,095 INFO L226 Difference]: Without dead ends: 88 [2021-12-06 18:50:52,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 75 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=382, Invalid=4155, Unknown=35, NotChecked=540, Total=5112 [2021-12-06 18:50:52,096 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:50:52,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 432 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1206 Invalid, 0 Unknown, 114 Unchecked, 0.4s Time] [2021-12-06 18:50:52,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-06 18:50:52,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2021-12-06 18:50:52,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 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) [2021-12-06 18:50:52,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2021-12-06 18:50:52,101 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 55 [2021-12-06 18:50:52,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:50:52,101 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2021-12-06 18:50:52,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.357142857142857) internal successors, (132), 56 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:52,102 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2021-12-06 18:50:52,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 18:50:52,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:50:52,102 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-12-06 18:50:52,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 18:50:52,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:50:52,303 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:50:52,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:50:52,305 INFO L85 PathProgramCache]: Analyzing trace with hash -147752396, now seen corresponding path program 15 times [2021-12-06 18:50:52,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:50:52,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831298564] [2021-12-06 18:50:52,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:50:52,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:50:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:52,628 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:50:52,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:50:52,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831298564] [2021-12-06 18:50:52,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831298564] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:50:52,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279741639] [2021-12-06 18:50:52,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:50:52,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:50:52,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:50:52,629 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:50:52,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 18:50:52,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-06 18:50:52,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:50:52,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 18:50:52,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:50:52,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:50:52,967 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-12-06 18:50:52,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 36 [2021-12-06 18:50:55,336 INFO L354 Elim1Store]: treesize reduction 90, result has 7.2 percent of original size [2021-12-06 18:50:55,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 52 treesize of output 26 [2021-12-06 18:50:55,388 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 51 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:50:55,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:51:02,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 47 [2021-12-06 18:51:02,365 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-06 18:51:02,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 313 treesize of output 295 [2021-12-06 18:51:02,599 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 50 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:51:02,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279741639] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:51:02,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:51:02,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24, 23] total 62 [2021-12-06 18:51:02,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101291643] [2021-12-06 18:51:02,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:51:02,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-06 18:51:02,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:51:02,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-06 18:51:02,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=3301, Unknown=4, NotChecked=0, Total=3782 [2021-12-06 18:51:02,601 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 62 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:51:04,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:51:04,240 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2021-12-06 18:51:04,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 18:51:04,240 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 62 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-06 18:51:04,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:51:04,241 INFO L225 Difference]: With dead ends: 94 [2021-12-06 18:51:04,241 INFO L226 Difference]: Without dead ends: 62 [2021-12-06 18:51:04,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2231 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1019, Invalid=8483, Unknown=4, NotChecked=0, Total=9506 [2021-12-06 18:51:04,242 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 39 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:51:04,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 311 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 181 Invalid, 0 Unknown, 130 Unchecked, 0.1s Time] [2021-12-06 18:51:04,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-06 18:51:04,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-12-06 18:51:04,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:51:04,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2021-12-06 18:51:04,247 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 56 [2021-12-06 18:51:04,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:51:04,247 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2021-12-06 18:51:04,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 62 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:51:04,248 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2021-12-06 18:51:04,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-06 18:51:04,248 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:51:04,248 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-12-06 18:51:04,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 18:51:04,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:51:04,450 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:51:04,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:51:04,451 INFO L85 PathProgramCache]: Analyzing trace with hash -412901702, now seen corresponding path program 16 times [2021-12-06 18:51:04,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:51:04,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115879567] [2021-12-06 18:51:04,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:51:04,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:51:04,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:51:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:51:04,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:51:04,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115879567] [2021-12-06 18:51:04,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115879567] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:51:04,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225996077] [2021-12-06 18:51:04,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:51:04,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:51:04,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:51:04,799 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:51:04,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 18:51:04,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:51:04,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:51:04,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 18:51:04,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:51:04,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:51:04,980 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:51:04,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 26 [2021-12-06 18:51:05,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:51:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:51:05,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:51:07,423 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_234| Int)) (or (forall ((v_ArrVal_608 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_234| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) v_ArrVal_608) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 28)))) (< |v_ULTIMATE.start_main_~i~0#1_234| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-06 18:51:07,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:51:07,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 82 treesize of output 78 [2021-12-06 18:51:07,895 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2021-12-06 18:51:07,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225996077] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:51:07,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:51:07,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 60 [2021-12-06 18:51:07,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638792252] [2021-12-06 18:51:07,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:51:07,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-06 18:51:07,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:51:07,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-06 18:51:07,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=3223, Unknown=1, NotChecked=114, Total=3540 [2021-12-06 18:51:07,897 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 60 states, 60 states have (on average 2.4) internal successors, (144), 60 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:51:10,136 WARN L838 $PredicateComparison]: unable to prove that (and (<= 7 |c_ULTIMATE.start_main_~i~0#1|) (<= 21 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)))) (<= 21 |c_ULTIMATE.start_main_~j~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_234| Int)) (or (forall ((v_ArrVal_608 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_234| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) v_ArrVal_608) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 28)))) (< |v_ULTIMATE.start_main_~i~0#1_234| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= |c_ULTIMATE.start_main_~i~0#1| 7)) is different from false [2021-12-06 18:51:10,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:51:10,460 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2021-12-06 18:51:10,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 18:51:10,460 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.4) internal successors, (144), 60 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-06 18:51:10,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:51:10,461 INFO L225 Difference]: With dead ends: 95 [2021-12-06 18:51:10,461 INFO L226 Difference]: Without dead ends: 93 [2021-12-06 18:51:10,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 85 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=265, Invalid=4163, Unknown=2, NotChecked=262, Total=4692 [2021-12-06 18:51:10,462 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:51:10,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 648 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1366 Invalid, 0 Unknown, 88 Unchecked, 0.4s Time] [2021-12-06 18:51:10,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-06 18:51:10,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 68. [2021-12-06 18:51:10,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:51:10,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2021-12-06 18:51:10,468 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 59 [2021-12-06 18:51:10,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:51:10,468 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2021-12-06 18:51:10,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.4) internal successors, (144), 60 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:51:10,468 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2021-12-06 18:51:10,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 18:51:10,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:51:10,469 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-12-06 18:51:10,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 18:51:10,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 18:51:10,670 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:51:10,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:51:10,670 INFO L85 PathProgramCache]: Analyzing trace with hash -302205485, now seen corresponding path program 1 times [2021-12-06 18:51:10,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:51:10,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473411401] [2021-12-06 18:51:10,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:51:10,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:51:10,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:51:10,748 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-06 18:51:10,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:51:10,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473411401] [2021-12-06 18:51:10,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473411401] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:51:10,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795991896] [2021-12-06 18:51:10,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:51:10,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:51:10,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:51:10,749 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:51:10,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 18:51:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:51:10,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 18:51:10,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:51:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-06 18:51:11,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:51:11,179 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-06 18:51:11,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795991896] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:51:11,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:51:11,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2021-12-06 18:51:11,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510774869] [2021-12-06 18:51:11,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:51:11,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 18:51:11,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:51:11,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 18:51:11,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=753, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 18:51:11,181 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 37 states, 37 states have (on average 2.8378378378378377) internal successors, (105), 36 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:51:11,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:51:11,412 INFO L93 Difference]: Finished difference Result 508 states and 534 transitions. [2021-12-06 18:51:11,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 18:51:11,413 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.8378378378378377) internal successors, (105), 36 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-06 18:51:11,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:51:11,415 INFO L225 Difference]: With dead ends: 508 [2021-12-06 18:51:11,415 INFO L226 Difference]: Without dead ends: 479 [2021-12-06 18:51:11,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=876, Invalid=1380, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 18:51:11,416 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 417 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:51:11,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 166 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:51:11,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-12-06 18:51:11,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 103. [2021-12-06 18:51:11,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 102 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:51:11,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 117 transitions. [2021-12-06 18:51:11,426 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 117 transitions. Word has length 61 [2021-12-06 18:51:11,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:51:11,426 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 117 transitions. [2021-12-06 18:51:11,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.8378378378378377) internal successors, (105), 36 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:51:11,426 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 117 transitions. [2021-12-06 18:51:11,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 18:51:11,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:51:11,426 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-12-06 18:51:11,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 18:51:11,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 18:51:11,628 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:51:11,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:51:11,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1031019404, now seen corresponding path program 17 times [2021-12-06 18:51:11,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:51:11,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064285999] [2021-12-06 18:51:11,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:51:11,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:51:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:51:11,993 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:51:11,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:51:11,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064285999] [2021-12-06 18:51:11,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064285999] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:51:11,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909165106] [2021-12-06 18:51:11,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:51:11,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:51:11,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:51:11,994 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:51:11,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 18:51:12,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-06 18:51:12,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:51:12,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 18:51:12,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:51:12,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:51:12,283 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:51:12,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2021-12-06 18:51:12,315 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:51:12,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2021-12-06 18:51:12,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:51:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 2 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:51:12,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:51:14,741 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_274| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_274| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_701 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_274| 4)) v_ArrVal_701) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 28)))))) is different from false [2021-12-06 18:51:36,019 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_275| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_275| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((|v_ULTIMATE.start_main_~i~0#1_274| Int) (v_ArrVal_701 Int) (v_ArrVal_699 Int)) (or (<= 0 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_275| 4)) v_ArrVal_699) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_274| 4)) v_ArrVal_701) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 28))) (< |v_ULTIMATE.start_main_~i~0#1_274| (+ |v_ULTIMATE.start_main_~i~0#1_275| 1)))))) is different from false [2021-12-06 18:51:36,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 28 [2021-12-06 18:51:36,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 386 treesize of output 378 [2021-12-06 18:51:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 17 not checked. [2021-12-06 18:51:36,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909165106] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:51:36,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:51:36,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 29] total 63 [2021-12-06 18:51:36,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998037373] [2021-12-06 18:51:36,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:51:36,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-06 18:51:36,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:51:36,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-06 18:51:36,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=3416, Unknown=35, NotChecked=238, Total=3906 [2021-12-06 18:51:36,723 INFO L87 Difference]: Start difference. First operand 103 states and 117 transitions. Second operand has 63 states, 63 states have (on average 2.380952380952381) internal successors, (150), 63 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:51:39,002 WARN L838 $PredicateComparison]: unable to prove that (and (<= 7 |c_ULTIMATE.start_main_~i~0#1|) (<= 21 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)))) (<= 21 |c_ULTIMATE.start_main_~j~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_275| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_275| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((|v_ULTIMATE.start_main_~i~0#1_274| Int) (v_ArrVal_701 Int) (v_ArrVal_699 Int)) (or (<= 0 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_275| 4)) v_ArrVal_699) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_274| 4)) v_ArrVal_701) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 28))) (< |v_ULTIMATE.start_main_~i~0#1_274| (+ |v_ULTIMATE.start_main_~i~0#1_275| 1)))))) (<= |c_ULTIMATE.start_main_~i~0#1| 7)) is different from false [2021-12-06 18:51:41,032 WARN L838 $PredicateComparison]: unable to prove that (and (<= 21 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 28))) (forall ((|v_ULTIMATE.start_main_~i~0#1_274| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_274| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_701 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_274| 4)) v_ArrVal_701) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 28)))))) (<= 8 |c_ULTIMATE.start_main_~i~0#1|)) is different from false [2021-12-06 18:51:41,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:51:41,564 INFO L93 Difference]: Finished difference Result 134 states and 148 transitions. [2021-12-06 18:51:41,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 18:51:41,565 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.380952380952381) internal successors, (150), 63 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-06 18:51:41,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:51:41,565 INFO L225 Difference]: With dead ends: 134 [2021-12-06 18:51:41,565 INFO L226 Difference]: Without dead ends: 132 [2021-12-06 18:51:41,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 85 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=434, Invalid=5397, Unknown=37, NotChecked=612, Total=6480 [2021-12-06 18:51:41,566 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 70 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 1624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:51:41,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 508 Invalid, 1624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1407 Invalid, 0 Unknown, 152 Unchecked, 0.5s Time] [2021-12-06 18:51:41,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-06 18:51:41,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 102. [2021-12-06 18:51:41,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 101 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:51:41,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 116 transitions. [2021-12-06 18:51:41,575 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 116 transitions. Word has length 62 [2021-12-06 18:51:41,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:51:41,575 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 116 transitions. [2021-12-06 18:51:41,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.380952380952381) internal successors, (150), 63 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:51:41,575 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 116 transitions. [2021-12-06 18:51:41,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 18:51:41,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:51:41,576 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-12-06 18:51:41,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-06 18:51:41,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 18:51:41,778 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:51:41,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:51:41,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1132689008, now seen corresponding path program 18 times [2021-12-06 18:51:41,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:51:41,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21919253] [2021-12-06 18:51:41,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:51:41,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:51:41,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:51:42,179 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:51:42,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:51:42,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21919253] [2021-12-06 18:51:42,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21919253] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:51:42,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726955673] [2021-12-06 18:51:42,180 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:51:42,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:51:42,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:51:42,180 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:51:42,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 18:51:42,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-06 18:51:42,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:51:42,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 18:51:42,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:51:42,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:51:42,969 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:51:42,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 10 [2021-12-06 18:51:42,994 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 91 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:51:42,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:51:46,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 16 [2021-12-06 18:51:46,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 38 treesize of output 32 [2021-12-06 18:51:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 84 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:51:47,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726955673] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:51:47,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:51:47,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 68 [2021-12-06 18:51:47,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441493084] [2021-12-06 18:51:47,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:51:47,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-06 18:51:47,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:51:47,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-06 18:51:47,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=602, Invalid=3954, Unknown=0, NotChecked=0, Total=4556 [2021-12-06 18:51:47,604 INFO L87 Difference]: Start difference. First operand 102 states and 116 transitions. Second operand has 68 states, 68 states have (on average 2.3970588235294117) internal successors, (163), 68 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:51:48,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:51:48,164 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2021-12-06 18:51:48,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 18:51:48,165 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.3970588235294117) internal successors, (163), 68 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-06 18:51:48,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:51:48,165 INFO L225 Difference]: With dead ends: 138 [2021-12-06 18:51:48,165 INFO L226 Difference]: Without dead ends: 102 [2021-12-06 18:51:48,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1982 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=861, Invalid=6279, Unknown=0, NotChecked=0, Total=7140 [2021-12-06 18:51:48,167 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 58 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:51:48,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 346 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 593 Invalid, 0 Unknown, 213 Unchecked, 0.2s Time] [2021-12-06 18:51:48,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-06 18:51:48,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-12-06 18:51:48,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:51:48,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2021-12-06 18:51:48,175 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 63 [2021-12-06 18:51:48,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:51:48,175 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2021-12-06 18:51:48,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.3970588235294117) internal successors, (163), 68 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:51:48,176 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2021-12-06 18:51:48,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 18:51:48,176 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:51:48,176 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-12-06 18:51:48,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 18:51:48,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:51:48,378 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:51:48,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:51:48,379 INFO L85 PathProgramCache]: Analyzing trace with hash 557731626, now seen corresponding path program 19 times [2021-12-06 18:51:48,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:51:48,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019769961] [2021-12-06 18:51:48,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:51:48,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:51:48,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:51:48,771 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:51:48,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:51:48,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019769961] [2021-12-06 18:51:48,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019769961] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:51:48,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81259824] [2021-12-06 18:51:48,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:51:48,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:51:48,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:51:48,772 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:51:48,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 18:51:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:51:48,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-06 18:51:48,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:51:48,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:51:48,979 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:51:48,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 26 [2021-12-06 18:51:49,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:51:49,224 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:51:49,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:51:51,498 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_313| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_313| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_792 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_313| 4)) v_ArrVal_792) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 32)))))) is different from false [2021-12-06 18:51:51,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:51:51,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 82 treesize of output 78 [2021-12-06 18:51:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 244 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-12-06 18:51:52,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81259824] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:51:52,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:51:52,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 67 [2021-12-06 18:51:52,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917829062] [2021-12-06 18:51:52,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:51:52,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-06 18:51:52,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:51:52,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-06 18:51:52,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=4066, Unknown=1, NotChecked=128, Total=4422 [2021-12-06 18:51:52,053 INFO L87 Difference]: Start difference. First operand 102 states and 115 transitions. Second operand has 67 states, 67 states have (on average 2.417910447761194) internal successors, (162), 67 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:51:54,383 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_313| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_313| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_792 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_313| 4)) v_ArrVal_792) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 32)))))) (<= |c_ULTIMATE.start_main_~i~0#1| 8) (<= 28 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)))) (<= 8 |c_ULTIMATE.start_main_~i~0#1|) (<= 28 |c_ULTIMATE.start_main_~j~0#1|)) is different from false [2021-12-06 18:51:54,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:51:54,881 INFO L93 Difference]: Finished difference Result 144 states and 157 transitions. [2021-12-06 18:51:54,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 18:51:54,881 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.417910447761194) internal successors, (162), 67 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-06 18:51:54,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:51:54,882 INFO L225 Difference]: With dead ends: 144 [2021-12-06 18:51:54,882 INFO L226 Difference]: Without dead ends: 142 [2021-12-06 18:51:54,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 90 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=322, Invalid=5536, Unknown=2, NotChecked=302, Total=6162 [2021-12-06 18:51:54,882 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 37 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 2003 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 2199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:51:54,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 1013 Invalid, 2199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2003 Invalid, 0 Unknown, 154 Unchecked, 0.6s Time] [2021-12-06 18:51:54,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-06 18:51:54,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 107. [2021-12-06 18:51:54,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.1320754716981132) internal successors, (120), 106 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:51:54,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 120 transitions. [2021-12-06 18:51:54,892 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 120 transitions. Word has length 66 [2021-12-06 18:51:54,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:51:54,892 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 120 transitions. [2021-12-06 18:51:54,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.417910447761194) internal successors, (162), 67 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:51:54,893 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 120 transitions. [2021-12-06 18:51:54,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 18:51:54,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:51:54,893 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-12-06 18:51:54,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-06 18:51:55,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:51:55,095 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:51:55,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:51:55,096 INFO L85 PathProgramCache]: Analyzing trace with hash 331940912, now seen corresponding path program 20 times [2021-12-06 18:51:55,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:51:55,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885389941] [2021-12-06 18:51:55,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:51:55,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:51:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:51:55,734 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:51:55,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:51:55,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885389941] [2021-12-06 18:51:55,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885389941] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:51:55,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924408899] [2021-12-06 18:51:55,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:51:55,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:51:55,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:51:55,735 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:51:55,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 18:51:55,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:51:55,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:51:55,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 18:51:55,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:51:56,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:51:56,282 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:51:56,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2021-12-06 18:51:56,322 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:51:56,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2021-12-06 18:51:56,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:51:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 2 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:51:56,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:51:59,076 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_334| Int)) (or (forall ((v_ArrVal_845 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_334| 4)) v_ArrVal_845) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 32)))) (< |v_ULTIMATE.start_main_~i~0#1_334| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-06 18:52:20,671 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_335| Int)) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_334| Int) (v_ArrVal_845 Int) (v_ArrVal_844 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_334| (+ |v_ULTIMATE.start_main_~i~0#1_335| 1)) (<= 0 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_335| 4)) v_ArrVal_844) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_334| 4)) v_ArrVal_845) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 32))))) (< |v_ULTIMATE.start_main_~i~0#1_335| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-06 18:52:20,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 28 [2021-12-06 18:52:20,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1610 treesize of output 1578 [2021-12-06 18:52:21,858 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 19 not checked. [2021-12-06 18:52:21,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924408899] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:52:21,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:52:21,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 32] total 89 [2021-12-06 18:52:21,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789489433] [2021-12-06 18:52:21,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:52:21,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-12-06 18:52:21,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:52:21,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-12-06 18:52:21,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=7115, Unknown=34, NotChecked=342, Total=7832 [2021-12-06 18:52:21,860 INFO L87 Difference]: Start difference. First operand 107 states and 120 transitions. Second operand has 89 states, 89 states have (on average 2.269662921348315) internal successors, (202), 89 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:24,179 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_335| Int)) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_334| Int) (v_ArrVal_845 Int) (v_ArrVal_844 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_334| (+ |v_ULTIMATE.start_main_~i~0#1_335| 1)) (<= 0 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_335| 4)) v_ArrVal_844) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_334| 4)) v_ArrVal_845) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 32))))) (< |v_ULTIMATE.start_main_~i~0#1_335| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= |c_ULTIMATE.start_main_~i~0#1| 8) (<= (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 28) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)))) (= |c_ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 8 |c_ULTIMATE.start_main_~i~0#1|) (<= 28 |c_ULTIMATE.start_main_~j~0#1|)) is different from false [2021-12-06 18:52:26,212 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_334| Int)) (or (forall ((v_ArrVal_845 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_334| 4)) v_ArrVal_845) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 32)))) (< |v_ULTIMATE.start_main_~i~0#1_334| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= 9 |c_ULTIMATE.start_main_~i~0#1|) (= |c_ULTIMATE.start_main_~#a~0#1.offset| 0) (<= (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 28) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 32)))) is different from false [2021-12-06 18:52:28,314 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 32)))) (and (forall ((|v_ULTIMATE.start_main_~i~0#1_334| Int)) (or (forall ((v_ArrVal_845 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_334| 4)) v_ArrVal_845) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 32)))) (< |v_ULTIMATE.start_main_~i~0#1_334| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= 10 |c_ULTIMATE.start_main_~i~0#1|) (<= 9 |c_ULTIMATE.start_main_~i~0#1|) (= |c_ULTIMATE.start_main_~#a~0#1.offset| 0) (<= (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 28) .cse0) (<= 28 .cse0))) is different from false [2021-12-06 18:52:29,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:52:29,254 INFO L93 Difference]: Finished difference Result 142 states and 155 transitions. [2021-12-06 18:52:29,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 18:52:29,254 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.269662921348315) internal successors, (202), 89 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-06 18:52:29,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:52:29,255 INFO L225 Difference]: With dead ends: 142 [2021-12-06 18:52:29,255 INFO L226 Difference]: Without dead ends: 140 [2021-12-06 18:52:29,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 78 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 2471 ImplicationChecksByTransitivity, 32.4s TimeCoverageRelationStatistics Valid=654, Invalid=10459, Unknown=37, NotChecked=1060, Total=12210 [2021-12-06 18:52:29,256 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 74 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 1871 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 2120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:52:29,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 643 Invalid, 2120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1871 Invalid, 0 Unknown, 169 Unchecked, 0.6s Time] [2021-12-06 18:52:29,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-06 18:52:29,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 106. [2021-12-06 18:52:29,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.1333333333333333) internal successors, (119), 105 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:29,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2021-12-06 18:52:29,267 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 69 [2021-12-06 18:52:29,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:52:29,267 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2021-12-06 18:52:29,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.269662921348315) internal successors, (202), 89 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:29,267 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2021-12-06 18:52:29,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 18:52:29,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:52:29,267 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-12-06 18:52:29,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-06 18:52:29,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 18:52:29,469 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:52:29,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:52:29,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1229951264, now seen corresponding path program 21 times [2021-12-06 18:52:29,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:52:29,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908699114] [2021-12-06 18:52:29,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:52:29,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:52:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:29,944 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:52:29,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:52:29,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908699114] [2021-12-06 18:52:29,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908699114] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:52:29,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401383178] [2021-12-06 18:52:29,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:52:29,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:52:29,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:52:29,946 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:52:29,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 18:52:30,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-06 18:52:30,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:52:30,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 18:52:30,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:52:30,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:52:30,842 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:52:30,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 10 [2021-12-06 18:52:30,870 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 120 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:52:30,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:52:50,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 16 [2021-12-06 18:52:50,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 38 treesize of output 32 [2021-12-06 18:52:51,320 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 112 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:52:51,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401383178] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:52:51,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:52:51,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 75 [2021-12-06 18:52:51,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887391655] [2021-12-06 18:52:51,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:52:51,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-06 18:52:51,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:52:51,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-06 18:52:51,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=722, Invalid=4828, Unknown=0, NotChecked=0, Total=5550 [2021-12-06 18:52:51,322 INFO L87 Difference]: Start difference. First operand 106 states and 119 transitions. Second operand has 75 states, 75 states have (on average 2.4133333333333336) internal successors, (181), 75 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:52,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:52:52,008 INFO L93 Difference]: Finished difference Result 146 states and 159 transitions. [2021-12-06 18:52:52,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 18:52:52,008 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.4133333333333336) internal successors, (181), 75 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-06 18:52:52,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:52:52,009 INFO L225 Difference]: With dead ends: 146 [2021-12-06 18:52:52,009 INFO L226 Difference]: Without dead ends: 106 [2021-12-06 18:52:52,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 104 SyntacticMatches, 5 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2454 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=1031, Invalid=7711, Unknown=0, NotChecked=0, Total=8742 [2021-12-06 18:52:52,010 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 60 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:52:52,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 485 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 738 Invalid, 0 Unknown, 240 Unchecked, 0.2s Time] [2021-12-06 18:52:52,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-06 18:52:52,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-12-06 18:52:52,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.1238095238095238) internal successors, (118), 105 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:52,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 118 transitions. [2021-12-06 18:52:52,020 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 118 transitions. Word has length 70 [2021-12-06 18:52:52,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:52:52,020 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 118 transitions. [2021-12-06 18:52:52,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.4133333333333336) internal successors, (181), 75 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:52,021 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 118 transitions. [2021-12-06 18:52:52,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 18:52:52,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:52:52,021 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-12-06 18:52:52,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-06 18:52:52,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:52:52,223 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:52:52,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:52:52,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1261252838, now seen corresponding path program 22 times [2021-12-06 18:52:52,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:52:52,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616288059] [2021-12-06 18:52:52,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:52:52,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:52:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:52,712 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:52:52,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:52:52,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616288059] [2021-12-06 18:52:52,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616288059] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:52:52,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146616783] [2021-12-06 18:52:52,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:52:52,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:52:52,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:52:52,713 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:52:52,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 18:52:52,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:52:52,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:52:52,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-06 18:52:52,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:52:52,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:52:52,961 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:52:52,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 26 [2021-12-06 18:52:53,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:52:53,268 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:52:53,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:52:55,621 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_377| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_377| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_943 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_377| 4)) v_ArrVal_943) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 36)))))) is different from false [2021-12-06 18:52:55,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:52:55,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 186 treesize of output 178 [2021-12-06 18:52:56,346 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 305 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2021-12-06 18:52:56,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146616783] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:52:56,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:52:56,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 74 [2021-12-06 18:52:56,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582778275] [2021-12-06 18:52:56,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:52:56,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-06 18:52:56,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:52:56,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-06 18:52:56,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=5007, Unknown=1, NotChecked=142, Total=5402 [2021-12-06 18:52:56,347 INFO L87 Difference]: Start difference. First operand 106 states and 118 transitions. Second operand has 74 states, 74 states have (on average 2.4324324324324325) internal successors, (180), 74 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:58,688 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_377| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_377| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_943 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_377| 4)) v_ArrVal_943) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 36)))))) (<= 9 |c_ULTIMATE.start_main_~i~0#1|) (<= 36 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)))) (<= |c_ULTIMATE.start_main_~i~0#1| 9) (<= 36 |c_ULTIMATE.start_main_~j~0#1|)) is different from false [2021-12-06 18:52:59,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:52:59,265 INFO L93 Difference]: Finished difference Result 152 states and 164 transitions. [2021-12-06 18:52:59,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 18:52:59,266 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.4324324324324325) internal successors, (180), 74 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-12-06 18:52:59,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:52:59,267 INFO L225 Difference]: With dead ends: 152 [2021-12-06 18:52:59,267 INFO L226 Difference]: Without dead ends: 150 [2021-12-06 18:52:59,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 102 SyntacticMatches, 6 SemanticMatches, 85 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=355, Invalid=6791, Unknown=2, NotChecked=334, Total=7482 [2021-12-06 18:52:59,267 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 74 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 1861 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 2048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:52:59,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 926 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1861 Invalid, 0 Unknown, 117 Unchecked, 0.6s Time] [2021-12-06 18:52:59,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-06 18:52:59,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 111. [2021-12-06 18:52:59,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1181818181818182) internal successors, (123), 110 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:59,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2021-12-06 18:52:59,279 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 73 [2021-12-06 18:52:59,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:52:59,279 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2021-12-06 18:52:59,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.4324324324324325) internal successors, (180), 74 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:59,280 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2021-12-06 18:52:59,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 18:52:59,280 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:52:59,280 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-12-06 18:52:59,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-06 18:52:59,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-06 18:52:59,482 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:52:59,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:52:59,483 INFO L85 PathProgramCache]: Analyzing trace with hash -312219360, now seen corresponding path program 23 times [2021-12-06 18:52:59,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:52:59,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635158911] [2021-12-06 18:52:59,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:52:59,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:52:59,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 0 proven. 350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:53:00,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:53:00,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635158911] [2021-12-06 18:53:00,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635158911] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:53:00,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763119430] [2021-12-06 18:53:00,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:53:00,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:53:00,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:53:00,042 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:53:00,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 18:53:00,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-12-06 18:53:00,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:53:00,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-06 18:53:00,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:53:00,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:53:00,349 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:53:00,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2021-12-06 18:53:00,384 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:53:00,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2021-12-06 18:53:00,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:53:00,703 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 2 proven. 348 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:53:00,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:53:03,068 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_400| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_400| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_1001 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_400| 4)) v_ArrVal_1001) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 36)))))) is different from false [2021-12-06 18:53:33,232 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_401| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_401| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((|v_ULTIMATE.start_main_~i~0#1_400| Int) (v_ArrVal_1001 Int) (v_ArrVal_999 Int)) (or (<= 0 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_401| 4)) v_ArrVal_999) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_400| 4)) v_ArrVal_1001) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 36))) (< |v_ULTIMATE.start_main_~i~0#1_400| (+ |v_ULTIMATE.start_main_~i~0#1_401| 1)))))) is different from false [2021-12-06 18:53:33,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 28 [2021-12-06 18:53:33,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 386 treesize of output 378 [2021-12-06 18:53:34,006 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 0 proven. 329 refuted. 0 times theorem prover too weak. 0 trivial. 21 not checked. [2021-12-06 18:53:34,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763119430] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:53:34,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:53:34,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 35] total 77 [2021-12-06 18:53:34,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706993842] [2021-12-06 18:53:34,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:53:34,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-06 18:53:34,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:53:34,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-06 18:53:34,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=5243, Unknown=48, NotChecked=294, Total=5852 [2021-12-06 18:53:34,008 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand has 77 states, 77 states have (on average 2.4155844155844157) internal successors, (186), 77 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) [2021-12-06 18:53:36,332 WARN L838 $PredicateComparison]: unable to prove that (and (<= 9 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_401| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_401| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((|v_ULTIMATE.start_main_~i~0#1_400| Int) (v_ArrVal_1001 Int) (v_ArrVal_999 Int)) (or (<= 0 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_401| 4)) v_ArrVal_999) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_400| 4)) v_ArrVal_1001) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 36))) (< |v_ULTIMATE.start_main_~i~0#1_400| (+ |v_ULTIMATE.start_main_~i~0#1_401| 1)))))) (<= 36 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)))) (<= |c_ULTIMATE.start_main_~i~0#1| 9) (<= 36 |c_ULTIMATE.start_main_~j~0#1|)) is different from false [2021-12-06 18:53:38,369 WARN L838 $PredicateComparison]: unable to prove that (and (<= 10 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_400| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_400| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_1001 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_400| 4)) v_ArrVal_1001) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 36)))))) (<= 36 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 36)))) is different from false [2021-12-06 18:53:40,406 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_400| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_400| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_1001 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_400| 4)) v_ArrVal_1001) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 36)))))) (<= 36 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 36))) (<= 11 |c_ULTIMATE.start_main_~i~0#1|)) is different from false [2021-12-06 18:53:41,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:53:41,219 INFO L93 Difference]: Finished difference Result 150 states and 162 transitions. [2021-12-06 18:53:41,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 18:53:41,220 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.4155844155844157) internal successors, (186), 77 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 76 [2021-12-06 18:53:41,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:53:41,221 INFO L225 Difference]: With dead ends: 150 [2021-12-06 18:53:41,221 INFO L226 Difference]: Without dead ends: 148 [2021-12-06 18:53:41,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 105 SyntacticMatches, 6 SemanticMatches, 98 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 2118 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=540, Invalid=8359, Unknown=51, NotChecked=950, Total=9900 [2021-12-06 18:53:41,221 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 102 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 2211 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 2499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:53:41,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 887 Invalid, 2499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2211 Invalid, 0 Unknown, 187 Unchecked, 0.7s Time] [2021-12-06 18:53:41,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-06 18:53:41,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 110. [2021-12-06 18:53:41,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.1192660550458715) internal successors, (122), 109 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:41,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 122 transitions. [2021-12-06 18:53:41,241 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 122 transitions. Word has length 76 [2021-12-06 18:53:41,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:53:41,241 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 122 transitions. [2021-12-06 18:53:41,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.4155844155844157) internal successors, (186), 77 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) [2021-12-06 18:53:41,242 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 122 transitions. [2021-12-06 18:53:41,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-06 18:53:41,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:53:41,242 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-12-06 18:53:41,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-06 18:53:41,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:53:41,444 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:53:41,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:53:41,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1499458916, now seen corresponding path program 24 times [2021-12-06 18:53:41,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:53:41,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280700330] [2021-12-06 18:53:41,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:53:41,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:53:41,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:41,995 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:53:41,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:53:41,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280700330] [2021-12-06 18:53:41,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280700330] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:53:41,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974663463] [2021-12-06 18:53:41,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:53:41,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:53:41,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:53:41,996 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:53:41,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-06 18:53:42,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-06 18:53:42,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:53:42,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 18:53:42,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:53:42,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:53:43,147 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:53:43,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 10 [2021-12-06 18:53:43,174 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 153 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:53:43,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:53:56,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 16 [2021-12-06 18:53:56,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 38 treesize of output 32 [2021-12-06 18:53:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 144 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:53:57,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974663463] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:53:57,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:53:57,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 82 [2021-12-06 18:53:57,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792398861] [2021-12-06 18:53:57,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:53:57,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-06 18:53:57,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:53:57,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-06 18:53:57,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=853, Invalid=5789, Unknown=0, NotChecked=0, Total=6642 [2021-12-06 18:53:57,656 INFO L87 Difference]: Start difference. First operand 110 states and 122 transitions. Second operand has 82 states, 82 states have (on average 2.426829268292683) internal successors, (199), 82 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:58,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:53:58,472 INFO L93 Difference]: Finished difference Result 154 states and 166 transitions. [2021-12-06 18:53:58,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-06 18:53:58,473 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.426829268292683) internal successors, (199), 82 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-06 18:53:58,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:53:58,473 INFO L225 Difference]: With dead ends: 154 [2021-12-06 18:53:58,473 INFO L226 Difference]: Without dead ends: 110 [2021-12-06 18:53:58,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 115 SyntacticMatches, 5 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3017 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=1243, Invalid=9469, Unknown=0, NotChecked=0, Total=10712 [2021-12-06 18:53:58,474 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 65 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:53:58,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 568 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 762 Invalid, 0 Unknown, 91 Unchecked, 0.3s Time] [2021-12-06 18:53:58,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-06 18:53:58,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-12-06 18:53:58,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.110091743119266) internal successors, (121), 109 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:58,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2021-12-06 18:53:58,487 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 77 [2021-12-06 18:53:58,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:53:58,487 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2021-12-06 18:53:58,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.426829268292683) internal successors, (199), 82 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:58,487 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2021-12-06 18:53:58,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-06 18:53:58,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:53:58,488 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-12-06 18:53:58,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-06 18:53:58,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-06 18:53:58,689 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:53:58,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:53:58,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1642864086, now seen corresponding path program 25 times [2021-12-06 18:53:58,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:53:58,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423141370] [2021-12-06 18:53:58,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:53:58,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:53:58,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:53:59,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:53:59,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423141370] [2021-12-06 18:53:59,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423141370] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:53:59,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050724404] [2021-12-06 18:53:59,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:53:59,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:53:59,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:53:59,243 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:53:59,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-06 18:53:59,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:59,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-06 18:53:59,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:53:59,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:53:59,502 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:53:59,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 26 [2021-12-06 18:53:59,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:53:59,870 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:53:59,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:55:04,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:55:04,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 186 treesize of output 178 [2021-12-06 18:55:05,212 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:55:05,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050724404] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:55:05,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:55:05,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 81 [2021-12-06 18:55:05,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212817895] [2021-12-06 18:55:05,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:55:05,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-06 18:55:05,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:05,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-06 18:55:05,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=6169, Unknown=31, NotChecked=0, Total=6480 [2021-12-06 18:55:05,214 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 81 states, 81 states have (on average 2.4444444444444446) internal successors, (198), 81 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:06,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:06,313 INFO L93 Difference]: Finished difference Result 165 states and 176 transitions. [2021-12-06 18:55:06,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-06 18:55:06,314 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.4444444444444446) internal successors, (198), 81 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-06 18:55:06,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:06,315 INFO L225 Difference]: With dead ends: 165 [2021-12-06 18:55:06,315 INFO L226 Difference]: Without dead ends: 163 [2021-12-06 18:55:06,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 111 SyntacticMatches, 6 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2287 ImplicationChecksByTransitivity, 66.2s TimeCoverageRelationStatistics Valid=434, Invalid=8847, Unknown=31, NotChecked=0, Total=9312 [2021-12-06 18:55:06,315 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 69 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 2277 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 2406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:06,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 1112 Invalid, 2406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2277 Invalid, 0 Unknown, 60 Unchecked, 0.7s Time] [2021-12-06 18:55:06,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-06 18:55:06,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 115. [2021-12-06 18:55:06,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.105263157894737) internal successors, (126), 114 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) [2021-12-06 18:55:06,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2021-12-06 18:55:06,329 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 80 [2021-12-06 18:55:06,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:06,329 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2021-12-06 18:55:06,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.4444444444444446) internal successors, (198), 81 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:06,330 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2021-12-06 18:55:06,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 18:55:06,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:06,330 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-12-06 18:55:06,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-12-06 18:55:06,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-06 18:55:06,531 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:06,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:06,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1480233052, now seen corresponding path program 26 times [2021-12-06 18:55:06,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:06,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964692162] [2021-12-06 18:55:06,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:06,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:06,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 0 proven. 422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:55:07,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:07,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964692162] [2021-12-06 18:55:07,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964692162] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:55:07,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969388775] [2021-12-06 18:55:07,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:55:07,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:55:07,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:55:07,136 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:55:07,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-06 18:55:07,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:55:07,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:55:07,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-06 18:55:07,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:55:07,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:55:07,378 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:55:07,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2021-12-06 18:55:07,417 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:55:07,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2021-12-06 18:55:07,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:55:07,774 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 2 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:55:07,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:56:35,451 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_473| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_473| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((|v_ULTIMATE.start_main_~i~0#1_472| Int) (v_ArrVal_1167 Int) (v_ArrVal_1169 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_472| (+ |v_ULTIMATE.start_main_~i~0#1_473| 1)) (<= 0 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_473| 4)) v_ArrVal_1167) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_472| 4)) v_ArrVal_1169) (+ 40 |c_ULTIMATE.start_main_~#a~0#1.offset|))))))) is different from false [2021-12-06 18:56:35,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 28 [2021-12-06 18:56:35,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 386 treesize of output 378 [2021-12-06 18:56:36,343 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 12 not checked. [2021-12-06 18:56:36,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969388775] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:56:36,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:56:36,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 38] total 84 [2021-12-06 18:56:36,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48573404] [2021-12-06 18:56:36,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:56:36,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-12-06 18:56:36,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:56:36,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-12-06 18:56:36,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=6436, Unknown=78, NotChecked=162, Total=6972 [2021-12-06 18:56:36,345 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand has 84 states, 84 states have (on average 2.4285714285714284) internal successors, (204), 84 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:56:38,753 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_473| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_473| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((|v_ULTIMATE.start_main_~i~0#1_472| Int) (v_ArrVal_1167 Int) (v_ArrVal_1169 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_472| (+ |v_ULTIMATE.start_main_~i~0#1_473| 1)) (<= 0 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_473| 4)) v_ArrVal_1167) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_472| 4)) v_ArrVal_1169) (+ 40 |c_ULTIMATE.start_main_~#a~0#1.offset|))))))) (<= 45 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)))) (<= |c_ULTIMATE.start_main_~i~0#1| 10) (<= 10 |c_ULTIMATE.start_main_~i~0#1|) (<= 45 |c_ULTIMATE.start_main_~j~0#1|)) is different from false [2021-12-06 18:56:41,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:56:41,488 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2021-12-06 18:56:41,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-06 18:56:41,489 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.4285714285714284) internal successors, (204), 84 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-06 18:56:41,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:56:41,490 INFO L225 Difference]: With dead ends: 158 [2021-12-06 18:56:41,490 INFO L226 Difference]: Without dead ends: 156 [2021-12-06 18:56:41,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 115 SyntacticMatches, 6 SemanticMatches, 97 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2356 ImplicationChecksByTransitivity, 93.3s TimeCoverageRelationStatistics Valid=430, Invalid=8810, Unknown=80, NotChecked=382, Total=9702 [2021-12-06 18:56:41,490 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 103 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 2390 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 2646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:56:41,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 906 Invalid, 2646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2390 Invalid, 0 Unknown, 165 Unchecked, 0.8s Time] [2021-12-06 18:56:41,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-06 18:56:41,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 114. [2021-12-06 18:56:41,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.1061946902654867) internal successors, (125), 113 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:56:41,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 125 transitions. [2021-12-06 18:56:41,505 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 125 transitions. Word has length 83 [2021-12-06 18:56:41,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:56:41,505 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 125 transitions. [2021-12-06 18:56:41,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.4285714285714284) internal successors, (204), 84 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:56:41,506 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 125 transitions. [2021-12-06 18:56:41,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 18:56:41,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:56:41,506 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-12-06 18:56:41,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-06 18:56:41,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-06 18:56:41,708 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:56:41,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:56:41,709 INFO L85 PathProgramCache]: Analyzing trace with hash 960432012, now seen corresponding path program 27 times [2021-12-06 18:56:41,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:56:41,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706893058] [2021-12-06 18:56:41,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:56:41,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:56:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:56:42,368 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 0 proven. 422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:56:42,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:56:42,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706893058] [2021-12-06 18:56:42,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706893058] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:56:42,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444934070] [2021-12-06 18:56:42,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:56:42,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:56:42,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:56:42,370 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:56:42,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-06 18:56:42,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-12-06 18:56:42,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:56:42,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 18:56:42,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:56:43,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:56:43,082 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-06 18:56:43,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 31 [2021-12-06 18:56:47,415 INFO L354 Elim1Store]: treesize reduction 96, result has 6.8 percent of original size [2021-12-06 18:56:47,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 48 treesize of output 20 [2021-12-06 18:56:47,453 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 163 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:56:47,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:56:57,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 54 treesize of output 50 [2021-12-06 18:56:57,933 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-06 18:56:57,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 206 treesize of output 193 [2021-12-06 18:56:58,010 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 144 proven. 278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:56:58,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444934070] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:56:58,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:56:58,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 32, 31] total 86 [2021-12-06 18:56:58,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419256943] [2021-12-06 18:56:58,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:56:58,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-06 18:56:58,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:56:58,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-06 18:56:58,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=756, Invalid=6545, Unknown=9, NotChecked=0, Total=7310 [2021-12-06 18:56:58,011 INFO L87 Difference]: Start difference. First operand 114 states and 125 transitions. Second operand has 86 states, 86 states have (on average 2.5) internal successors, (215), 86 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:57:03,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:57:03,585 INFO L93 Difference]: Finished difference Result 162 states and 173 transitions. [2021-12-06 18:57:03,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-06 18:57:03,585 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.5) internal successors, (215), 86 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have 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 [2021-12-06 18:57:03,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:57:03,586 INFO L225 Difference]: With dead ends: 162 [2021-12-06 18:57:03,586 INFO L226 Difference]: Without dead ends: 114 [2021-12-06 18:57:03,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 122 SyntacticMatches, 4 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4751 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=1764, Invalid=18248, Unknown=10, NotChecked=0, Total=20022 [2021-12-06 18:57:03,587 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 83 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:57:03,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 649 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 471 Invalid, 0 Unknown, 220 Unchecked, 0.2s Time] [2021-12-06 18:57:03,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-06 18:57:03,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-12-06 18:57:03,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0973451327433628) internal successors, (124), 113 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:57:03,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2021-12-06 18:57:03,602 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 84 [2021-12-06 18:57:03,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:57:03,602 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2021-12-06 18:57:03,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.5) internal successors, (215), 86 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:57:03,603 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2021-12-06 18:57:03,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 18:57:03,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:57:03,603 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-12-06 18:57:03,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-06 18:57:03,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:57:03,804 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:57:03,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:57:03,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1503344878, now seen corresponding path program 28 times [2021-12-06 18:57:03,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:57:03,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294744899] [2021-12-06 18:57:03,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:57:03,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:57:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:57:04,468 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:57:04,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:57:04,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294744899] [2021-12-06 18:57:04,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294744899] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:57:04,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862782118] [2021-12-06 18:57:04,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:57:04,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:57:04,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:57:04,469 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:57:04,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-06 18:57:04,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:57:04,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:57:04,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-06 18:57:04,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:57:04,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:57:04,752 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:57:04,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 26 [2021-12-06 18:57:05,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:57:05,182 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:57:05,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:58:05,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:58:05,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 186 treesize of output 178 [2021-12-06 18:58:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:58:06,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862782118] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:58:06,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:58:06,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 88 [2021-12-06 18:58:06,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748263221] [2021-12-06 18:58:06,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:58:06,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-12-06 18:58:06,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:58:06,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-12-06 18:58:06,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=7322, Unknown=29, NotChecked=0, Total=7656 [2021-12-06 18:58:06,695 INFO L87 Difference]: Start difference. First operand 114 states and 124 transitions. Second operand has 88 states, 88 states have (on average 2.4545454545454546) internal successors, (216), 88 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:12,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:58:12,003 INFO L93 Difference]: Finished difference Result 168 states and 178 transitions. [2021-12-06 18:58:12,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-06 18:58:12,004 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.4545454545454546) internal successors, (216), 88 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-12-06 18:58:12,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:58:12,004 INFO L225 Difference]: With dead ends: 168 [2021-12-06 18:58:12,004 INFO L226 Difference]: Without dead ends: 166 [2021-12-06 18:58:12,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 120 SyntacticMatches, 6 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2618 ImplicationChecksByTransitivity, 66.5s TimeCoverageRelationStatistics Valid=430, Invalid=10045, Unknown=31, NotChecked=0, Total=10506 [2021-12-06 18:58:12,005 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 68 mSDsluCounter, 1226 mSDsCounter, 0 mSdLazyCounter, 2750 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 2882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:58:12,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 1256 Invalid, 2882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2750 Invalid, 0 Unknown, 51 Unchecked, 0.9s Time] [2021-12-06 18:58:12,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-06 18:58:12,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 119. [2021-12-06 18:58:12,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0932203389830508) internal successors, (129), 118 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) [2021-12-06 18:58:12,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2021-12-06 18:58:12,022 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 87 [2021-12-06 18:58:12,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:58:12,022 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2021-12-06 18:58:12,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.4545454545454546) internal successors, (216), 88 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:12,022 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2021-12-06 18:58:12,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-06 18:58:12,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:58:12,023 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-12-06 18:58:12,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-12-06 18:58:12,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-06 18:58:12,224 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:58:12,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:58:12,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1110413772, now seen corresponding path program 29 times [2021-12-06 18:58:12,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:58:12,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933210888] [2021-12-06 18:58:12,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:58:12,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:58:12,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:58:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 0 proven. 501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:58:12,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:58:12,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933210888] [2021-12-06 18:58:12,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933210888] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:58:12,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932170527] [2021-12-06 18:58:12,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:58:12,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:58:12,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:58:12,833 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:58:12,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503ba1f1-768e-4f6f-b601-5426046eb533/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-06 18:58:12,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-12-06 18:58:12,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:58:12,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-06 18:58:13,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:58:13,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:58:13,183 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:58:13,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 27 [2021-12-06 18:58:13,252 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:58:13,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 29 [2021-12-06 18:58:13,326 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:58:13,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 29 [2021-12-06 18:58:13,407 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:58:13,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 30 [2021-12-06 18:58:13,487 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:58:13,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 30 [2021-12-06 18:58:13,574 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:58:13,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 30 [2021-12-06 18:58:13,663 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:58:13,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 30 [2021-12-06 18:58:13,760 INFO L354 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2021-12-06 18:58:13,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-12-06 18:58:13,816 INFO L354 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2021-12-06 18:58:13,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-12-06 18:58:14,838 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 18:58:14,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 12 [2021-12-06 18:58:14,880 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 0 proven. 501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:58:14,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:02:07,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 177 treesize of output 173