./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_const4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_const4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G --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 e61c61c9ffe0a2031cf5a0964b1882adcc5bdae1b7345aeaf1c374f155ad9e78 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:10:40,446 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:10:40,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:10:40,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:10:40,479 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:10:40,480 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:10:40,482 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:10:40,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:10:40,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:10:40,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:10:40,488 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:10:40,490 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:10:40,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:10:40,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:10:40,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:10:40,495 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:10:40,496 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:10:40,497 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:10:40,499 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:10:40,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:10:40,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:10:40,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:10:40,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:10:40,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:10:40,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:10:40,520 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:10:40,520 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:10:40,521 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:10:40,523 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:10:40,524 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:10:40,525 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:10:40,526 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:10:40,527 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:10:40,528 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:10:40,530 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:10:40,530 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:10:40,532 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:10:40,532 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:10:40,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:10:40,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:10:40,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:10:40,535 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 13:10:40,582 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:10:40,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:10:40,583 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:10:40,583 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:10:40,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:10:40,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:10:40,585 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:10:40,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:10:40,585 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:10:40,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:10:40,585 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:10:40,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:10:40,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 13:10:40,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:10:40,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 13:10:40,586 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:10:40,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 13:10:40,587 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:10:40,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 13:10:40,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:10:40,587 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:10:40,587 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:10:40,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:10:40,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:10:40,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:10:40,588 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 13:10:40,588 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:10:40,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:10:40,594 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 13:10:40,595 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 13:10:40,595 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 13:10:40,595 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:10:40,596 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_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e61c61c9ffe0a2031cf5a0964b1882adcc5bdae1b7345aeaf1c374f155ad9e78 [2021-11-23 13:10:40,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:10:40,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:10:40,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:10:40,888 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:10:40,890 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:10:40,891 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/array-crafted/zero_sum_const4.c [2021-11-23 13:10:40,973 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/data/f54147718/ca8e8ede924440e494131fc911c07a75/FLAGce5132e09 [2021-11-23 13:10:41,462 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:10:41,463 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/sv-benchmarks/c/array-crafted/zero_sum_const4.c [2021-11-23 13:10:41,482 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/data/f54147718/ca8e8ede924440e494131fc911c07a75/FLAGce5132e09 [2021-11-23 13:10:41,816 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/data/f54147718/ca8e8ede924440e494131fc911c07a75 [2021-11-23 13:10:41,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:10:41,820 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:10:41,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:10:41,822 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:10:41,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:10:41,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:10:41" (1/1) ... [2021-11-23 13:10:41,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@739bfd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:10:41, skipping insertion in model container [2021-11-23 13:10:41,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:10:41" (1/1) ... [2021-11-23 13:10:41,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:10:41,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:10:42,030 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_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/sv-benchmarks/c/array-crafted/zero_sum_const4.c[406,419] [2021-11-23 13:10:42,073 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:10:42,079 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:10:42,091 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_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/sv-benchmarks/c/array-crafted/zero_sum_const4.c[406,419] [2021-11-23 13:10:42,101 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:10:42,112 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:10:42,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:10:42 WrapperNode [2021-11-23 13:10:42,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:10:42,114 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:10:42,114 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:10:42,114 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:10:42,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:10:42" (1/1) ... [2021-11-23 13:10:42,127 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:10:42" (1/1) ... [2021-11-23 13:10:42,150 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 126 [2021-11-23 13:10:42,150 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:10:42,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:10:42,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:10:42,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:10:42,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:10:42" (1/1) ... [2021-11-23 13:10:42,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:10:42" (1/1) ... [2021-11-23 13:10:42,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:10:42" (1/1) ... [2021-11-23 13:10:42,162 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:10:42" (1/1) ... [2021-11-23 13:10:42,169 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:10:42" (1/1) ... [2021-11-23 13:10:42,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:10:42" (1/1) ... [2021-11-23 13:10:42,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:10:42" (1/1) ... [2021-11-23 13:10:42,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:10:42,179 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:10:42,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:10:42,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:10:42,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:10:42" (1/1) ... [2021-11-23 13:10:42,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:10:42,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:10:42,213 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:10:42,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:10:42,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:10:42,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 13:10:42,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 13:10:42,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 13:10:42,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:10:42,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:10:42,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 13:10:42,310 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:10:42,311 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:10:42,492 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:10:42,513 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:10:42,513 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-23 13:10:42,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:10:42 BoogieIcfgContainer [2021-11-23 13:10:42,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:10:42,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:10:42,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:10:42,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:10:42,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:10:41" (1/3) ... [2021-11-23 13:10:42,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@546edfdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:10:42, skipping insertion in model container [2021-11-23 13:10:42,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:10:42" (2/3) ... [2021-11-23 13:10:42,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@546edfdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:10:42, skipping insertion in model container [2021-11-23 13:10:42,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:10:42" (3/3) ... [2021-11-23 13:10:42,525 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const4.c [2021-11-23 13:10:42,530 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:10:42,530 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 13:10:42,613 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:10:42,621 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 [2021-11-23 13:10:42,621 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 13:10:42,636 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:42,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 13:10:42,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:42,642 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:10:42,643 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:10:42,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:42,648 INFO L85 PathProgramCache]: Analyzing trace with hash -2094998668, now seen corresponding path program 1 times [2021-11-23 13:10:42,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:10:42,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137722330] [2021-11-23 13:10:42,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:10:42,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:10:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:10:42,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:42,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:10:42,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137722330] [2021-11-23 13:10:42,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137722330] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:10:42,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:10:42,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:10:42,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131790668] [2021-11-23 13:10:42,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:10:42,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 13:10:42,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:10:42,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 13:10:42,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 13:10:42,929 INFO L87 Difference]: Start difference. First operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 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) [2021-11-23 13:10:42,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:42,955 INFO L93 Difference]: Finished difference Result 71 states and 106 transitions. [2021-11-23 13:10:42,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 13:10:42,960 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 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 23 [2021-11-23 13:10:42,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:42,969 INFO L225 Difference]: With dead ends: 71 [2021-11-23 13:10:42,970 INFO L226 Difference]: Without dead ends: 33 [2021-11-23 13:10:42,973 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 [2021-11-23 13:10:42,986 INFO L933 BasicCegarLoop]: 47 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, 47 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 [2021-11-23 13:10:42,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:10:43,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-23 13:10:43,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-23 13:10:43,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:43,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2021-11-23 13:10:43,019 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 23 [2021-11-23 13:10:43,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:43,020 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2021-11-23 13:10:43,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 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) [2021-11-23 13:10:43,020 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2021-11-23 13:10:43,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 13:10:43,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:43,021 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:10:43,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:10:43,022 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:10:43,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:43,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1680934388, now seen corresponding path program 1 times [2021-11-23 13:10:43,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:10:43,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787918665] [2021-11-23 13:10:43,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:10:43,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:10:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:10:43,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:43,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:10:43,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787918665] [2021-11-23 13:10:43,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787918665] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:10:43,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:10:43,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:10:43,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297047679] [2021-11-23 13:10:43,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:10:43,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:10:43,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:10:43,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:10:43,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:10:43,105 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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) [2021-11-23 13:10:43,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:43,203 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2021-11-23 13:10:43,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:10:43,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 23 [2021-11-23 13:10:43,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:43,207 INFO L225 Difference]: With dead ends: 63 [2021-11-23 13:10:43,207 INFO L226 Difference]: Without dead ends: 35 [2021-11-23 13:10:43,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:10:43,213 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:10:43,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:10:43,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-23 13:10:43,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-11-23 13:10:43,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:43,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-11-23 13:10:43,221 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 23 [2021-11-23 13:10:43,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:43,222 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-11-23 13:10:43,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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) [2021-11-23 13:10:43,222 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-11-23 13:10:43,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 13:10:43,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:43,224 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:10:43,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 13:10:43,224 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:10:43,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:43,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1381660206, now seen corresponding path program 1 times [2021-11-23 13:10:43,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:10:43,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216125966] [2021-11-23 13:10:43,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:10:43,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:10:43,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:10:43,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:10:43,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:10:43,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216125966] [2021-11-23 13:10:43,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216125966] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:10:43,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:10:43,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:10:43,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017203054] [2021-11-23 13:10:43,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:10:43,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:10:43,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:10:43,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:10:43,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:10:43,323 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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) [2021-11-23 13:10:43,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:43,420 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2021-11-23 13:10:43,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:10:43,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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) Word has length 25 [2021-11-23 13:10:43,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:43,422 INFO L225 Difference]: With dead ends: 76 [2021-11-23 13:10:43,422 INFO L226 Difference]: Without dead ends: 51 [2021-11-23 13:10:43,422 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 [2021-11-23 13:10:43,424 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 52 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:10:43,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 17 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:10:43,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-23 13:10:43,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2021-11-23 13:10:43,432 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) [2021-11-23 13:10:43,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-11-23 13:10:43,434 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 25 [2021-11-23 13:10:43,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:43,434 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-11-23 13:10:43,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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) [2021-11-23 13:10:43,435 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-11-23 13:10:43,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 13:10:43,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:43,436 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:10:43,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 13:10:43,437 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:10:43,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:43,437 INFO L85 PathProgramCache]: Analyzing trace with hash -158323138, now seen corresponding path program 1 times [2021-11-23 13:10:43,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:10:43,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782713647] [2021-11-23 13:10:43,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:10:43,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:10:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:10:43,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 13:10:43,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:10:43,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782713647] [2021-11-23 13:10:43,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782713647] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:10:43,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835994678] [2021-11-23 13:10:43,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:10:43,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:10:43,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:10:43,525 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:10:43,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 13:10:43,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:10:43,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 13:10:43,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:10:43,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 13:10:43,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:10:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 13:10:43,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835994678] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:10:43,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:10:43,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 13:10:43,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572815718] [2021-11-23 13:10:43,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:10:43,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 13:10:43,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:10:43,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 13:10:43,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:10:43,907 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2021-11-23 13:10:43,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:43,998 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2021-11-23 13:10:43,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:10:43,999 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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 41 [2021-11-23 13:10:43,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:44,000 INFO L225 Difference]: With dead ends: 81 [2021-11-23 13:10:44,000 INFO L226 Difference]: Without dead ends: 45 [2021-11-23 13:10:44,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:10:44,002 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:10:44,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 40 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:10:44,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-23 13:10:44,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-11-23 13:10:44,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 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) [2021-11-23 13:10:44,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2021-11-23 13:10:44,010 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 41 [2021-11-23 13:10:44,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:44,011 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2021-11-23 13:10:44,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2021-11-23 13:10:44,011 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2021-11-23 13:10:44,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 13:10:44,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:44,013 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:10:44,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 13:10:44,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:10:44,229 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:10:44,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:44,230 INFO L85 PathProgramCache]: Analyzing trace with hash 408266208, now seen corresponding path program 2 times [2021-11-23 13:10:44,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:10:44,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705343648] [2021-11-23 13:10:44,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:10:44,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:10:44,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:10:44,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 13:10:44,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:10:44,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705343648] [2021-11-23 13:10:44,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705343648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:10:44,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240982893] [2021-11-23 13:10:44,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:10:44,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:10:44,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:10:44,302 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:10:44,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 13:10:44,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:10:44,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:10:44,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 13:10:44,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:10:44,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 13:10:44,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:10:44,570 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 13:10:44,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240982893] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:10:44,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:10:44,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-11-23 13:10:44,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988670317] [2021-11-23 13:10:44,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:10:44,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 13:10:44,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:10:44,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 13:10:44,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:10:44,573 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:44,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:44,707 INFO L93 Difference]: Finished difference Result 101 states and 123 transitions. [2021-11-23 13:10:44,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:10:44,708 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-23 13:10:44,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:44,709 INFO L225 Difference]: With dead ends: 101 [2021-11-23 13:10:44,709 INFO L226 Difference]: Without dead ends: 69 [2021-11-23 13:10:44,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:10:44,711 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:10:44,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 20 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:10:44,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-23 13:10:44,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2021-11-23 13:10:44,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:44,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-11-23 13:10:44,719 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 43 [2021-11-23 13:10:44,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:44,719 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-11-23 13:10:44,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:44,720 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-11-23 13:10:44,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-23 13:10:44,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:44,721 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:10:44,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 13:10:44,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:10:44,945 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:10:44,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:44,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1004340752, now seen corresponding path program 3 times [2021-11-23 13:10:44,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:10:44,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417128964] [2021-11-23 13:10:44,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:10:44,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:10:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:10:46,725 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:46,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:10:46,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417128964] [2021-11-23 13:10:46,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417128964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:10:46,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277562926] [2021-11-23 13:10:46,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:10:46,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:10:46,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:10:46,727 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:10:46,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 13:10:46,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 13:10:46,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:10:46,798 WARN L261 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-23 13:10:46,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:10:46,920 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 [2021-11-23 13:10:50,136 INFO L354 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2021-11-23 13:10:50,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 40 [2021-11-23 13:10:50,380 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:50,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:11:08,576 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 89 treesize of output 81 [2021-11-23 13:11:08,596 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:11:08,597 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 261 treesize of output 229 [2021-11-23 13:11:09,804 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:11:09,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277562926] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:11:09,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:11:09,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28, 27] total 66 [2021-11-23 13:11:09,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933721064] [2021-11-23 13:11:09,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:11:09,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-23 13:11:09,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:11:09,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-23 13:11:09,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=3863, Unknown=3, NotChecked=0, Total=4290 [2021-11-23 13:11:09,810 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 66 states, 66 states have (on average 2.5606060606060606) internal successors, (169), 66 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:11:12,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:12,762 INFO L93 Difference]: Finished difference Result 167 states and 193 transitions. [2021-11-23 13:11:12,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-23 13:11:12,763 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.5606060606060606) internal successors, (169), 66 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-23 13:11:12,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:12,766 INFO L225 Difference]: With dead ends: 167 [2021-11-23 13:11:12,767 INFO L226 Difference]: Without dead ends: 162 [2021-11-23 13:11:12,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 68 SyntacticMatches, 33 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3064 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=687, Invalid=6116, Unknown=3, NotChecked=0, Total=6806 [2021-11-23 13:11:12,771 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:11:12,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 153 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 88 Invalid, 0 Unknown, 375 Unchecked, 0.1s Time] [2021-11-23 13:11:12,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-23 13:11:12,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 111. [2021-11-23 13:11:12,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1727272727272726) internal successors, (129), 110 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) [2021-11-23 13:11:12,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 129 transitions. [2021-11-23 13:11:12,789 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 129 transitions. Word has length 59 [2021-11-23 13:11:12,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:12,790 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 129 transitions. [2021-11-23 13:11:12,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.5606060606060606) internal successors, (169), 66 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:11:12,791 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 129 transitions. [2021-11-23 13:11:12,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 13:11:12,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:12,792 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:11:12,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 13:11:13,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 13:11:13,001 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:11:13,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:13,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1580077422, now seen corresponding path program 4 times [2021-11-23 13:11:13,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:11:13,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758851092] [2021-11-23 13:11:13,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:13,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:11:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 13:11:13,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:11:13,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758851092] [2021-11-23 13:11:13,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758851092] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:11:13,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024190912] [2021-11-23 13:11:13,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:11:13,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:11:13,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:11:13,119 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:11:13,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 13:11:13,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:11:13,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:11:13,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 13:11:13,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:11:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 13:11:13,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:11:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 13:11:13,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024190912] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:11:13,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:11:13,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-11-23 13:11:13,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121454948] [2021-11-23 13:11:13,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:11:13,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 13:11:13,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:11:13,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 13:11:13,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-23 13:11:13,485 INFO L87 Difference]: Start difference. First operand 111 states and 129 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 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) [2021-11-23 13:11:13,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:13,847 INFO L93 Difference]: Finished difference Result 249 states and 288 transitions. [2021-11-23 13:11:13,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 13:11:13,848 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 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) Word has length 61 [2021-11-23 13:11:13,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:13,849 INFO L225 Difference]: With dead ends: 249 [2021-11-23 13:11:13,849 INFO L226 Difference]: Without dead ends: 152 [2021-11-23 13:11:13,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-23 13:11:13,851 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 155 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:11:13,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 36 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:11:13,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-23 13:11:13,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 128. [2021-11-23 13:11:13,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.141732283464567) internal successors, (145), 127 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:11:13,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 145 transitions. [2021-11-23 13:11:13,865 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 145 transitions. Word has length 61 [2021-11-23 13:11:13,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:13,865 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 145 transitions. [2021-11-23 13:11:13,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 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) [2021-11-23 13:11:13,865 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 145 transitions. [2021-11-23 13:11:13,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 13:11:13,867 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:13,867 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:11:13,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 13:11:14,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:11:14,073 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:11:14,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:14,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1506179060, now seen corresponding path program 5 times [2021-11-23 13:11:14,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:11:14,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539144335] [2021-11-23 13:11:14,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:14,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:11:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 13:11:14,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:11:14,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539144335] [2021-11-23 13:11:14,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539144335] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:11:14,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782922716] [2021-11-23 13:11:14,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:11:14,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:11:14,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:11:14,149 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:11:14,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 13:11:14,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-23 13:11:14,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:11:14,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 13:11:14,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:11:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 13:11:14,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:11:14,542 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 13:11:14,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782922716] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:11:14,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:11:14,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-11-23 13:11:14,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754912662] [2021-11-23 13:11:14,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:11:14,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 13:11:14,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:11:14,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 13:11:14,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-23 13:11:14,543 INFO L87 Difference]: Start difference. First operand 128 states and 145 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:11:14,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:14,874 INFO L93 Difference]: Finished difference Result 142 states and 159 transitions. [2021-11-23 13:11:14,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 13:11:14,875 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-23 13:11:14,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:14,876 INFO L225 Difference]: With dead ends: 142 [2021-11-23 13:11:14,876 INFO L226 Difference]: Without dead ends: 96 [2021-11-23 13:11:14,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-11-23 13:11:14,888 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 107 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:11:14,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 36 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:11:14,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-23 13:11:14,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 78. [2021-11-23 13:11:14,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 77 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:11:14,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2021-11-23 13:11:14,910 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 63 [2021-11-23 13:11:14,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:14,910 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2021-11-23 13:11:14,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:11:14,911 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2021-11-23 13:11:14,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 13:11:14,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:14,912 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:11:14,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 13:11:15,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:11:15,112 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:11:15,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:15,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1152417058, now seen corresponding path program 6 times [2021-11-23 13:11:15,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:11:15,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196843576] [2021-11-23 13:11:15,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:15,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:11:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:20,155 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:11:20,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:11:20,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196843576] [2021-11-23 13:11:20,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196843576] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:11:20,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407396501] [2021-11-23 13:11:20,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:11:20,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:11:20,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:11:20,160 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:11:20,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 13:11:20,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-23 13:11:20,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:11:20,224 WARN L261 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 112 conjunts are in the unsatisfiable core [2021-11-23 13:11:20,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:11:25,358 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:11:25,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:12:23,086 INFO L354 Elim1Store]: treesize reduction 272, result has 60.3 percent of original size [2021-11-23 13:12:23,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 199 treesize of output 459 [2021-11-23 13:14:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:14:29,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407396501] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:14:29,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:14:29,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 47, 40] total 132 [2021-11-23 13:14:29,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551944] [2021-11-23 13:14:29,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:14:29,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2021-11-23 13:14:29,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:14:29,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-11-23 13:14:29,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=972, Invalid=16304, Unknown=16, NotChecked=0, Total=17292 [2021-11-23 13:14:29,607 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 132 states, 132 states have (on average 1.6363636363636365) internal successors, (216), 132 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) [2021-11-23 13:14:38,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:14:38,393 INFO L93 Difference]: Finished difference Result 150 states and 166 transitions. [2021-11-23 13:14:38,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-23 13:14:38,393 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.6363636363636365) internal successors, (216), 132 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 77 [2021-11-23 13:14:38,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:14:38,395 INFO L225 Difference]: With dead ends: 150 [2021-11-23 13:14:38,395 INFO L226 Difference]: Without dead ends: 146 [2021-11-23 13:14:38,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 74 SyntacticMatches, 22 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 7 DeprecatedPredicates, 10371 ImplicationChecksByTransitivity, 69.8s TimeCoverageRelationStatistics Valid=1759, Invalid=28327, Unknown=16, NotChecked=0, Total=30102 [2021-11-23 13:14:38,406 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 1716 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 3032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1170 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:14:38,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 252 Invalid, 3032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1716 Invalid, 0 Unknown, 1170 Unchecked, 1.3s Time] [2021-11-23 13:14:38,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-23 13:14:38,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 131. [2021-11-23 13:14:38,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.123076923076923) internal successors, (146), 130 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:14:38,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 146 transitions. [2021-11-23 13:14:38,419 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 146 transitions. Word has length 77 [2021-11-23 13:14:38,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:14:38,419 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 146 transitions. [2021-11-23 13:14:38,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.6363636363636365) internal successors, (216), 132 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) [2021-11-23 13:14:38,420 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 146 transitions. [2021-11-23 13:14:38,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 13:14:38,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:14:38,422 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:14:38,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 13:14:38,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:14:38,623 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:14:38,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:14:38,623 INFO L85 PathProgramCache]: Analyzing trace with hash -214262460, now seen corresponding path program 7 times [2021-11-23 13:14:38,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:14:38,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808619282] [2021-11-23 13:14:38,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:14:38,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:14:38,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:14:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-23 13:14:38,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:14:38,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808619282] [2021-11-23 13:14:38,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808619282] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:14:38,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87273393] [2021-11-23 13:14:38,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 13:14:38,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:14:38,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:14:38,736 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:14:38,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 13:14:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:14:38,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 13:14:38,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:14:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-23 13:14:39,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:14:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-23 13:14:39,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87273393] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:14:39,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:14:39,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-11-23 13:14:39,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287646573] [2021-11-23 13:14:39,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:14:39,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 13:14:39,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:14:39,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 13:14:39,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-11-23 13:14:39,254 INFO L87 Difference]: Start difference. First operand 131 states and 146 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 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) [2021-11-23 13:14:39,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:14:39,715 INFO L93 Difference]: Finished difference Result 293 states and 328 transitions. [2021-11-23 13:14:39,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 13:14:39,715 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-23 13:14:39,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:14:39,717 INFO L225 Difference]: With dead ends: 293 [2021-11-23 13:14:39,717 INFO L226 Difference]: Without dead ends: 166 [2021-11-23 13:14:39,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-11-23 13:14:39,718 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 222 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:14:39,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 47 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 13:14:39,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-23 13:14:39,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 142. [2021-11-23 13:14:39,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.1063829787234043) internal successors, (156), 141 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:14:39,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 156 transitions. [2021-11-23 13:14:39,729 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 156 transitions. Word has length 79 [2021-11-23 13:14:39,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:14:39,730 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 156 transitions. [2021-11-23 13:14:39,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 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) [2021-11-23 13:14:39,730 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 156 transitions. [2021-11-23 13:14:39,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-23 13:14:39,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:14:39,735 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:14:39,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 13:14:39,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 13:14:39,941 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:14:39,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:14:39,941 INFO L85 PathProgramCache]: Analyzing trace with hash 385815078, now seen corresponding path program 8 times [2021-11-23 13:14:39,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:14:39,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213327671] [2021-11-23 13:14:39,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:14:39,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:14:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:14:40,040 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-23 13:14:40,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:14:40,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213327671] [2021-11-23 13:14:40,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213327671] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:14:40,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113057884] [2021-11-23 13:14:40,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:14:40,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:14:40,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:14:40,043 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:14:40,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 13:14:40,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:14:40,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:14:40,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 13:14:40,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:14:40,316 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-23 13:14:40,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:14:40,466 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-23 13:14:40,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113057884] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:14:40,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:14:40,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-11-23 13:14:40,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800442703] [2021-11-23 13:14:40,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:14:40,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 13:14:40,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:14:40,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 13:14:40,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-11-23 13:14:40,469 INFO L87 Difference]: Start difference. First operand 142 states and 156 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 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) [2021-11-23 13:14:40,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:14:40,874 INFO L93 Difference]: Finished difference Result 156 states and 170 transitions. [2021-11-23 13:14:40,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 13:14:40,875 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-23 13:14:40,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:14:40,876 INFO L225 Difference]: With dead ends: 156 [2021-11-23 13:14:40,876 INFO L226 Difference]: Without dead ends: 104 [2021-11-23 13:14:40,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-11-23 13:14:40,877 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 188 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:14:40,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 30 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:14:40,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-23 13:14:40,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2021-11-23 13:14:40,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0947368421052632) internal successors, (104), 95 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:14:40,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2021-11-23 13:14:40,885 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 81 [2021-11-23 13:14:40,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:14:40,886 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2021-11-23 13:14:40,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 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) [2021-11-23 13:14:40,886 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2021-11-23 13:14:40,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 13:14:40,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:14:40,888 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:14:40,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 13:14:41,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:14:41,101 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:14:41,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:14:41,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1202071596, now seen corresponding path program 9 times [2021-11-23 13:14:41,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:14:41,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699191361] [2021-11-23 13:14:41,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:14:41,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:14:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:14:48,768 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 3 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:14:48,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:14:48,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699191361] [2021-11-23 13:14:48,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699191361] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:14:48,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087096559] [2021-11-23 13:14:48,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:14:48,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:14:48,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:14:48,770 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:14:48,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 13:14:48,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-23 13:14:48,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:14:48,843 WARN L261 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 154 conjunts are in the unsatisfiable core [2021-11-23 13:14:48,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:14:48,943 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 [2021-11-23 13:14:49,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:14:49,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-23 13:14:56,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:14:56,415 INFO L354 Elim1Store]: treesize reduction 152, result has 22.8 percent of original size [2021-11-23 13:14:56,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 73 treesize of output 75 [2021-11-23 13:14:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 7 proven. 136 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:14:56,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:15:09,914 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:15:09,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087096559] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:15:09,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:15:09,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 30, 21] total 109 [2021-11-23 13:15:09,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20018709] [2021-11-23 13:15:09,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:15:09,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-11-23 13:15:09,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:15:09,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-11-23 13:15:09,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=610, Invalid=11162, Unknown=0, NotChecked=0, Total=11772 [2021-11-23 13:15:09,921 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand has 109 states, 109 states have (on average 2.4862385321100917) internal successors, (271), 109 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:15:28,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:15:28,470 INFO L93 Difference]: Finished difference Result 328 states and 360 transitions. [2021-11-23 13:15:28,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-11-23 13:15:28,471 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.4862385321100917) internal successors, (271), 109 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-23 13:15:28,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:15:28,473 INFO L225 Difference]: With dead ends: 328 [2021-11-23 13:15:28,473 INFO L226 Difference]: Without dead ends: 322 [2021-11-23 13:15:28,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 125 SyntacticMatches, 43 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14504 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=1884, Invalid=39528, Unknown=0, NotChecked=0, Total=41412 [2021-11-23 13:15:28,477 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 57 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 1405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 734 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:15:28,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 229 Invalid, 1405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 608 Invalid, 0 Unknown, 734 Unchecked, 0.6s Time] [2021-11-23 13:15:28,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-11-23 13:15:28,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 183. [2021-11-23 13:15:28,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.1043956043956045) internal successors, (201), 182 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:15:28,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 201 transitions. [2021-11-23 13:15:28,501 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 201 transitions. Word has length 95 [2021-11-23 13:15:28,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:15:28,502 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 201 transitions. [2021-11-23 13:15:28,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.4862385321100917) internal successors, (271), 109 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:15:28,503 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 201 transitions. [2021-11-23 13:15:28,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 13:15:28,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:15:28,504 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:15:28,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 13:15:28,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 13:15:28,724 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:15:28,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:15:28,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1175667574, now seen corresponding path program 10 times [2021-11-23 13:15:28,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:15:28,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695376503] [2021-11-23 13:15:28,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:15:28,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:15:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:15:28,862 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-23 13:15:28,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:15:28,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695376503] [2021-11-23 13:15:28,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695376503] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:15:28,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404710341] [2021-11-23 13:15:28,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:15:28,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:15:28,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:15:28,865 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:15:28,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 13:15:28,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:15:28,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:15:28,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 13:15:28,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:15:29,193 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-23 13:15:29,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:15:29,368 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-23 13:15:29,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404710341] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:15:29,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:15:29,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-11-23 13:15:29,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427633954] [2021-11-23 13:15:29,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:15:29,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 13:15:29,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:15:29,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 13:15:29,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-11-23 13:15:29,371 INFO L87 Difference]: Start difference. First operand 183 states and 201 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 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) [2021-11-23 13:15:29,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:15:29,898 INFO L93 Difference]: Finished difference Result 417 states and 459 transitions. [2021-11-23 13:15:29,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 13:15:29,899 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 13:15:29,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:15:29,900 INFO L225 Difference]: With dead ends: 417 [2021-11-23 13:15:29,900 INFO L226 Difference]: Without dead ends: 196 [2021-11-23 13:15:29,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-11-23 13:15:29,901 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 287 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:15:29,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 50 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 13:15:29,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-23 13:15:29,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 172. [2021-11-23 13:15:29,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.087719298245614) internal successors, (186), 171 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) [2021-11-23 13:15:29,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 186 transitions. [2021-11-23 13:15:29,928 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 186 transitions. Word has length 97 [2021-11-23 13:15:29,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:15:29,929 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 186 transitions. [2021-11-23 13:15:29,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 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) [2021-11-23 13:15:29,929 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 186 transitions. [2021-11-23 13:15:29,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 13:15:29,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:15:29,930 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:15:29,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 13:15:30,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:15:30,131 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:15:30,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:15:30,132 INFO L85 PathProgramCache]: Analyzing trace with hash 356238296, now seen corresponding path program 11 times [2021-11-23 13:15:30,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:15:30,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229660948] [2021-11-23 13:15:30,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:15:30,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:15:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:15:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-23 13:15:30,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:15:30,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229660948] [2021-11-23 13:15:30,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229660948] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:15:30,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460613730] [2021-11-23 13:15:30,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:15:30,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:15:30,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:15:30,261 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:15:30,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 13:15:30,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-23 13:15:30,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:15:30,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 13:15:30,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:15:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-23 13:15:30,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:15:30,939 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-23 13:15:30,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460613730] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:15:30,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:15:30,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-11-23 13:15:30,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846314759] [2021-11-23 13:15:30,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:15:30,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 13:15:30,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:15:30,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 13:15:30,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-11-23 13:15:30,941 INFO L87 Difference]: Start difference. First operand 172 states and 186 transitions. Second operand has 20 states, 20 states have (on average 4.5) internal successors, (90), 20 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) [2021-11-23 13:15:31,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:15:31,455 INFO L93 Difference]: Finished difference Result 186 states and 200 transitions. [2021-11-23 13:15:31,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 13:15:31,456 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 20 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 99 [2021-11-23 13:15:31,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:15:31,456 INFO L225 Difference]: With dead ends: 186 [2021-11-23 13:15:31,456 INFO L226 Difference]: Without dead ends: 122 [2021-11-23 13:15:31,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 189 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2021-11-23 13:15:31,458 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 202 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:15:31,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 29 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 13:15:31,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-23 13:15:31,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2021-11-23 13:15:31,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.079646017699115) internal successors, (122), 113 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) [2021-11-23 13:15:31,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2021-11-23 13:15:31,469 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 99 [2021-11-23 13:15:31,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:15:31,469 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2021-11-23 13:15:31,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 20 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) [2021-11-23 13:15:31,470 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2021-11-23 13:15:31,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-23 13:15:31,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:15:31,471 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:15:31,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 13:15:31,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:15:31,677 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:15:31,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:15:31,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1362635270, now seen corresponding path program 12 times [2021-11-23 13:15:31,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:15:31,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461236116] [2021-11-23 13:15:31,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:15:31,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:15:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:15:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 8 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:15:43,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:15:43,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461236116] [2021-11-23 13:15:43,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461236116] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:15:43,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95531519] [2021-11-23 13:15:43,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:15:43,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:15:43,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:15:43,091 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:15:43,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 13:15:43,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-23 13:15:43,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:15:43,178 WARN L261 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 187 conjunts are in the unsatisfiable core [2021-11-23 13:15:43,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:15:43,418 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 [2021-11-23 13:15:52,962 INFO L354 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2021-11-23 13:15:52,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 40 [2021-11-23 13:15:53,581 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 3 proven. 221 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:15:53,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:16:12,278 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 13:16:12,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95531519] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:16:12,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:16:12,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 34, 25] total 133 [2021-11-23 13:16:12,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834291141] [2021-11-23 13:16:12,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:16:12,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2021-11-23 13:16:12,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:16:12,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2021-11-23 13:16:12,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=823, Invalid=16733, Unknown=0, NotChecked=0, Total=17556 [2021-11-23 13:16:12,283 INFO L87 Difference]: Start difference. First operand 114 states and 122 transitions. Second operand has 133 states, 133 states have (on average 2.4210526315789473) internal successors, (322), 133 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:16:46,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:16:46,837 INFO L93 Difference]: Finished difference Result 379 states and 410 transitions. [2021-11-23 13:16:46,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2021-11-23 13:16:46,838 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.4210526315789473) internal successors, (322), 133 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-23 13:16:46,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:16:46,840 INFO L225 Difference]: With dead ends: 379 [2021-11-23 13:16:46,841 INFO L226 Difference]: Without dead ends: 373 [2021-11-23 13:16:46,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 152 SyntacticMatches, 54 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 20716 ImplicationChecksByTransitivity, 58.6s TimeCoverageRelationStatistics Valid=2982, Invalid=61280, Unknown=0, NotChecked=0, Total=64262 [2021-11-23 13:16:46,845 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1241 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:16:46,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 195 Invalid, 2095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 790 Invalid, 0 Unknown, 1241 Unchecked, 0.7s Time] [2021-11-23 13:16:46,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-11-23 13:16:46,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 217. [2021-11-23 13:16:46,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.087962962962963) internal successors, (235), 216 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:16:46,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 235 transitions. [2021-11-23 13:16:46,875 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 235 transitions. Word has length 113 [2021-11-23 13:16:46,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:16:46,875 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 235 transitions. [2021-11-23 13:16:46,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.4210526315789473) internal successors, (322), 133 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:16:46,876 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 235 transitions. [2021-11-23 13:16:46,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 13:16:46,877 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:16:46,877 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:16:46,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 13:16:47,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 13:16:47,078 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:16:47,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:16:47,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1548943064, now seen corresponding path program 13 times [2021-11-23 13:16:47,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:16:47,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420124996] [2021-11-23 13:16:47,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:16:47,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:16:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:16:47,245 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-11-23 13:16:47,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:16:47,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420124996] [2021-11-23 13:16:47,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420124996] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:16:47,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094223189] [2021-11-23 13:16:47,246 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 13:16:47,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:16:47,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:16:47,247 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:16:47,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 13:16:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:16:47,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 13:16:47,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:16:47,663 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-11-23 13:16:47,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:16:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-11-23 13:16:47,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094223189] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:16:47,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:16:47,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-11-23 13:16:47,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441574207] [2021-11-23 13:16:47,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:16:47,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 13:16:47,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:16:47,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 13:16:47,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-11-23 13:16:47,882 INFO L87 Difference]: Start difference. First operand 217 states and 235 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:16:48,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:16:48,546 INFO L93 Difference]: Finished difference Result 489 states and 531 transitions. [2021-11-23 13:16:48,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 13:16:48,561 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-11-23 13:16:48,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:16:48,563 INFO L225 Difference]: With dead ends: 489 [2021-11-23 13:16:48,563 INFO L226 Difference]: Without dead ends: 226 [2021-11-23 13:16:48,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2021-11-23 13:16:48,565 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 360 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:16:48,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 45 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 13:16:48,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-23 13:16:48,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 202. [2021-11-23 13:16:48,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.0746268656716418) internal successors, (216), 201 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) [2021-11-23 13:16:48,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 216 transitions. [2021-11-23 13:16:48,584 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 216 transitions. Word has length 115 [2021-11-23 13:16:48,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:16:48,584 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 216 transitions. [2021-11-23 13:16:48,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:16:48,585 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 216 transitions. [2021-11-23 13:16:48,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 13:16:48,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:16:48,586 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:16:48,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 13:16:48,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 13:16:48,801 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:16:48,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:16:48,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1257919222, now seen corresponding path program 14 times [2021-11-23 13:16:48,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:16:48,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171257966] [2021-11-23 13:16:48,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:16:48,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:16:48,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:16:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-23 13:16:48,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:16:48,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171257966] [2021-11-23 13:16:48,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171257966] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:16:48,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636027740] [2021-11-23 13:16:48,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:16:48,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:16:48,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:16:48,965 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:16:48,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 13:16:49,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:16:49,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:16:49,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 13:16:49,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:16:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-23 13:16:49,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:16:49,551 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-23 13:16:49,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636027740] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:16:49,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:16:49,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-11-23 13:16:49,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577617661] [2021-11-23 13:16:49,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:16:49,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 13:16:49,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:16:49,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 13:16:49,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-11-23 13:16:49,554 INFO L87 Difference]: Start difference. First operand 202 states and 216 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:16:50,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:16:50,168 INFO L93 Difference]: Finished difference Result 216 states and 230 transitions. [2021-11-23 13:16:50,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 13:16:50,168 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-23 13:16:50,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:16:50,169 INFO L225 Difference]: With dead ends: 216 [2021-11-23 13:16:50,169 INFO L226 Difference]: Without dead ends: 140 [2021-11-23 13:16:50,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 13:16:50,170 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 417 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:16:50,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 22 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 13:16:50,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-23 13:16:50,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 132. [2021-11-23 13:16:50,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0687022900763359) internal successors, (140), 131 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:16:50,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 140 transitions. [2021-11-23 13:16:50,185 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 140 transitions. Word has length 117 [2021-11-23 13:16:50,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:16:50,185 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 140 transitions. [2021-11-23 13:16:50,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:16:50,186 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 140 transitions. [2021-11-23 13:16:50,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-23 13:16:50,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:16:50,187 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:16:50,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 13:16:50,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 13:16:50,393 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:16:50,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:16:50,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1520659528, now seen corresponding path program 15 times [2021-11-23 13:16:50,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:16:50,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295546289] [2021-11-23 13:16:50,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:16:50,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:16:50,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:17:09,443 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 8 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:17:09,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:17:09,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295546289] [2021-11-23 13:17:09,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295546289] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:17:09,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491451533] [2021-11-23 13:17:09,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:17:09,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:17:09,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:17:09,444 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:17:09,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 13:17:09,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-23 13:17:09,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:17:09,571 WARN L261 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 221 conjunts are in the unsatisfiable core [2021-11-23 13:17:09,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:17:09,792 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 [2021-11-23 13:17:23,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:17:23,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:17:23,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:17:23,606 INFO L354 Elim1Store]: treesize reduction 175, result has 31.9 percent of original size [2021-11-23 13:17:23,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 80 treesize of output 111 [2021-11-23 13:17:24,470 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 7 proven. 308 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:17:24,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:17:50,338 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 13:17:50,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491451533] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:17:50,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:17:50,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 37, 29] total 156 [2021-11-23 13:17:50,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389897437] [2021-11-23 13:17:50,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:17:50,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2021-11-23 13:17:50,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:17:50,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2021-11-23 13:17:50,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=978, Invalid=23202, Unknown=0, NotChecked=0, Total=24180 [2021-11-23 13:17:50,342 INFO L87 Difference]: Start difference. First operand 132 states and 140 transitions. Second operand has 156 states, 156 states have (on average 2.371794871794872) internal successors, (370), 156 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:19:02,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:19:02,679 INFO L93 Difference]: Finished difference Result 476 states and 510 transitions. [2021-11-23 13:19:02,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 237 states. [2021-11-23 13:19:02,684 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 2.371794871794872) internal successors, (370), 156 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-23 13:19:02,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:19:02,686 INFO L225 Difference]: With dead ends: 476 [2021-11-23 13:19:02,687 INFO L226 Difference]: Without dead ends: 470 [2021-11-23 13:19:02,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 180 SyntacticMatches, 53 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29931 ImplicationChecksByTransitivity, 109.9s TimeCoverageRelationStatistics Valid=4035, Invalid=95505, Unknown=0, NotChecked=0, Total=99540 [2021-11-23 13:19:02,691 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 53 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 1526 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 3400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 1526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1656 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:19:02,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 237 Invalid, 3400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 1526 Invalid, 0 Unknown, 1656 Unchecked, 1.5s Time] [2021-11-23 13:19:02,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-11-23 13:19:02,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 251. [2021-11-23 13:19:02,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.076) internal successors, (269), 250 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:19:02,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 269 transitions. [2021-11-23 13:19:02,725 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 269 transitions. Word has length 131 [2021-11-23 13:19:02,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:19:02,726 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 269 transitions. [2021-11-23 13:19:02,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 2.371794871794872) internal successors, (370), 156 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:19:02,726 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 269 transitions. [2021-11-23 13:19:02,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-23 13:19:02,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:19:02,728 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:19:02,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 13:19:02,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 13:19:02,948 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:19:02,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:19:02,948 INFO L85 PathProgramCache]: Analyzing trace with hash 458290778, now seen corresponding path program 16 times [2021-11-23 13:19:02,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:19:02,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40778095] [2021-11-23 13:19:02,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:19:02,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:19:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:19:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-11-23 13:19:03,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:19:03,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40778095] [2021-11-23 13:19:03,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40778095] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:19:03,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977923349] [2021-11-23 13:19:03,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:19:03,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:19:03,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:19:03,157 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:19:03,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 13:19:03,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:19:03,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:19:03,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 13:19:03,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:19:03,745 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-11-23 13:19:03,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:19:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-11-23 13:19:04,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977923349] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:19:04,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:19:04,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-11-23 13:19:04,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102048232] [2021-11-23 13:19:04,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:19:04,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 13:19:04,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:19:04,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 13:19:04,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-11-23 13:19:04,098 INFO L87 Difference]: Start difference. First operand 251 states and 269 transitions. Second operand has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:19:04,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:19:04,904 INFO L93 Difference]: Finished difference Result 561 states and 603 transitions. [2021-11-23 13:19:04,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 13:19:04,905 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-23 13:19:04,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:19:04,907 INFO L225 Difference]: With dead ends: 561 [2021-11-23 13:19:04,907 INFO L226 Difference]: Without dead ends: 256 [2021-11-23 13:19:04,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 13:19:04,908 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 451 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:19:04,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 44 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 13:19:04,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-23 13:19:04,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 232. [2021-11-23 13:19:04,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.0649350649350648) internal successors, (246), 231 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:19:04,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 246 transitions. [2021-11-23 13:19:04,934 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 246 transitions. Word has length 133 [2021-11-23 13:19:04,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:19:04,934 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 246 transitions. [2021-11-23 13:19:04,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:19:04,935 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 246 transitions. [2021-11-23 13:19:04,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-23 13:19:04,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:19:04,937 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:19:04,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 13:19:05,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:19:05,165 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:19:05,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:19:05,165 INFO L85 PathProgramCache]: Analyzing trace with hash -19010116, now seen corresponding path program 17 times [2021-11-23 13:19:05,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:19:05,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803130740] [2021-11-23 13:19:05,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:19:05,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:19:05,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:19:05,366 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-11-23 13:19:05,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:19:05,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803130740] [2021-11-23 13:19:05,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803130740] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:19:05,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421954826] [2021-11-23 13:19:05,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:19:05,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:19:05,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:19:05,373 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:19:05,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 13:19:05,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-23 13:19:05,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:19:05,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 13:19:05,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:19:06,204 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-11-23 13:19:06,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:19:06,496 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-11-23 13:19:06,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421954826] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:19:06,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:19:06,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-11-23 13:19:06,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917493624] [2021-11-23 13:19:06,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:19:06,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 13:19:06,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:19:06,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 13:19:06,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-11-23 13:19:06,498 INFO L87 Difference]: Start difference. First operand 232 states and 246 transitions. Second operand has 26 states, 26 states have (on average 4.538461538461538) internal successors, (118), 26 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) [2021-11-23 13:19:07,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:19:07,264 INFO L93 Difference]: Finished difference Result 246 states and 260 transitions. [2021-11-23 13:19:07,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 13:19:07,265 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.538461538461538) internal successors, (118), 26 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-11-23 13:19:07,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:19:07,266 INFO L225 Difference]: With dead ends: 246 [2021-11-23 13:19:07,266 INFO L226 Difference]: Without dead ends: 158 [2021-11-23 13:19:07,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 259 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=1207, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 13:19:07,267 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 351 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:19:07,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 35 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 13:19:07,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-23 13:19:07,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2021-11-23 13:19:07,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0604026845637584) internal successors, (158), 149 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:19:07,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 158 transitions. [2021-11-23 13:19:07,280 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 158 transitions. Word has length 135 [2021-11-23 13:19:07,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:19:07,280 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 158 transitions. [2021-11-23 13:19:07,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.538461538461538) internal successors, (118), 26 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) [2021-11-23 13:19:07,281 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 158 transitions. [2021-11-23 13:19:07,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-23 13:19:07,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:19:07,282 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:19:07,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 13:19:07,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:19:07,496 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:19:07,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:19:07,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1596967702, now seen corresponding path program 18 times [2021-11-23 13:19:07,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:19:07,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437734582] [2021-11-23 13:19:07,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:19:07,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:19:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:19:33,596 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 20 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:19:33,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:19:33,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437734582] [2021-11-23 13:19:33,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437734582] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:19:33,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997405749] [2021-11-23 13:19:33,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:19:33,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:19:33,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:19:33,598 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:19:33,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 13:19:33,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-23 13:19:33,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:19:33,748 WARN L261 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 255 conjunts are in the unsatisfiable core [2021-11-23 13:19:33,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:19:33,972 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 [2021-11-23 13:19:54,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:19:54,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:19:54,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:19:54,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:19:54,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:19:54,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:19:54,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:19:54,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:19:54,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:19:54,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:19:54,668 INFO L354 Elim1Store]: treesize reduction 465, result has 30.5 percent of original size [2021-11-23 13:19:54,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 10 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 116 treesize of output 237 [2021-11-23 13:19:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 11 proven. 405 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 13:19:56,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:20:30,462 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 405 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 13:20:30,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997405749] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:20:30,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:20:30,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 40, 33] total 185 [2021-11-23 13:20:30,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547144311] [2021-11-23 13:20:30,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:20:30,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 185 states [2021-11-23 13:20:30,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:20:30,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 185 interpolants. [2021-11-23 13:20:30,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1348, Invalid=32692, Unknown=0, NotChecked=0, Total=34040 [2021-11-23 13:20:30,467 INFO L87 Difference]: Start difference. First operand 150 states and 158 transitions. Second operand has 185 states, 185 states have (on average 2.264864864864865) internal successors, (419), 185 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:22:01,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:22:01,803 INFO L93 Difference]: Finished difference Result 512 states and 544 transitions. [2021-11-23 13:22:01,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2021-11-23 13:22:01,804 INFO L78 Accepts]: Start accepts. Automaton has has 185 states, 185 states have (on average 2.264864864864865) internal successors, (419), 185 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-23 13:22:01,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:22:01,807 INFO L225 Difference]: With dead ends: 512 [2021-11-23 13:22:01,808 INFO L226 Difference]: Without dead ends: 508 [2021-11-23 13:22:01,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 209 SyntacticMatches, 43 SemanticMatches, 358 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41144 ImplicationChecksByTransitivity, 149.7s TimeCoverageRelationStatistics Valid=4690, Invalid=124550, Unknown=0, NotChecked=0, Total=129240 [2021-11-23 13:22:01,817 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 100 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 2770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1852 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 13:22:01,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 269 Invalid, 2770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 877 Invalid, 0 Unknown, 1852 Unchecked, 0.8s Time] [2021-11-23 13:22:01,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-11-23 13:22:01,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 285. [2021-11-23 13:22:01,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.0669014084507042) internal successors, (303), 284 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:22:01,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 303 transitions. [2021-11-23 13:22:01,870 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 303 transitions. Word has length 149 [2021-11-23 13:22:01,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:22:01,870 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 303 transitions. [2021-11-23 13:22:01,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 185 states, 185 states have (on average 2.264864864864865) internal successors, (419), 185 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:22:01,871 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 303 transitions. [2021-11-23 13:22:01,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-23 13:22:01,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:22:01,873 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:22:01,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 13:22:02,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:22:02,089 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:22:02,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:22:02,089 INFO L85 PathProgramCache]: Analyzing trace with hash 876626700, now seen corresponding path program 19 times [2021-11-23 13:22:02,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:22:02,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828342973] [2021-11-23 13:22:02,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:22:02,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:22:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:22:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-11-23 13:22:02,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:22:02,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828342973] [2021-11-23 13:22:02,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828342973] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:22:02,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154607709] [2021-11-23 13:22:02,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 13:22:02,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:22:02,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:22:02,338 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:22:02,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 13:22:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:22:02,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 13:22:02,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:22:02,992 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-11-23 13:22:02,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:22:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-11-23 13:22:03,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154607709] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:22:03,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:22:03,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2021-11-23 13:22:03,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801456787] [2021-11-23 13:22:03,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:22:03,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 13:22:03,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:22:03,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 13:22:03,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-11-23 13:22:03,277 INFO L87 Difference]: Start difference. First operand 285 states and 303 transitions. Second operand has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:22:04,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:22:04,442 INFO L93 Difference]: Finished difference Result 633 states and 675 transitions. [2021-11-23 13:22:04,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 13:22:04,443 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-11-23 13:22:04,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:22:04,445 INFO L225 Difference]: With dead ends: 633 [2021-11-23 13:22:04,445 INFO L226 Difference]: Without dead ends: 286 [2021-11-23 13:22:04,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 13:22:04,447 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 475 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 508 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 508 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 13:22:04,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 43 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [508 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 13:22:04,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-23 13:22:04,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 262. [2021-11-23 13:22:04,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.0574712643678161) internal successors, (276), 261 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:22:04,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 276 transitions. [2021-11-23 13:22:04,483 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 276 transitions. Word has length 151 [2021-11-23 13:22:04,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:22:04,483 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 276 transitions. [2021-11-23 13:22:04,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:22:04,483 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 276 transitions. [2021-11-23 13:22:04,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-23 13:22:04,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:22:04,485 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:22:04,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-23 13:22:04,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:22:04,701 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:22:04,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:22:04,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1791121938, now seen corresponding path program 20 times [2021-11-23 13:22:04,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:22:04,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493259547] [2021-11-23 13:22:04,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:22:04,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:22:04,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:22:04,957 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2021-11-23 13:22:04,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:22:04,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493259547] [2021-11-23 13:22:04,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493259547] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:22:04,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639747179] [2021-11-23 13:22:04,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:22:04,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:22:04,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:22:04,961 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:22:04,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 13:22:05,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:22:05,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:22:05,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 13:22:05,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:22:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2021-11-23 13:22:05,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:22:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2021-11-23 13:22:05,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639747179] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:22:05,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:22:05,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2021-11-23 13:22:05,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279286985] [2021-11-23 13:22:05,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:22:05,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 13:22:05,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:22:05,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 13:22:05,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-11-23 13:22:05,849 INFO L87 Difference]: Start difference. First operand 262 states and 276 transitions. Second operand has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:22:06,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:22:06,715 INFO L93 Difference]: Finished difference Result 276 states and 290 transitions. [2021-11-23 13:22:06,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 13:22:06,715 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-11-23 13:22:06,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:22:06,717 INFO L225 Difference]: With dead ends: 276 [2021-11-23 13:22:06,717 INFO L226 Difference]: Without dead ends: 176 [2021-11-23 13:22:06,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 294 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=441, Invalid=1539, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 13:22:06,718 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 398 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:22:06,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 35 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 13:22:06,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-23 13:22:06,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 168. [2021-11-23 13:22:06,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0538922155688624) internal successors, (176), 167 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:22:06,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 176 transitions. [2021-11-23 13:22:06,743 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 176 transitions. Word has length 153 [2021-11-23 13:22:06,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:22:06,743 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 176 transitions. [2021-11-23 13:22:06,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:22:06,744 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 176 transitions. [2021-11-23 13:22:06,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-23 13:22:06,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:22:06,745 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:22:06,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-23 13:22:06,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-23 13:22:06,958 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:22:06,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:22:06,958 INFO L85 PathProgramCache]: Analyzing trace with hash -141283940, now seen corresponding path program 21 times [2021-11-23 13:22:06,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:22:06,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860593796] [2021-11-23 13:22:06,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:22:06,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:22:07,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:22:42,807 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 26 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:22:42,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:22:42,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860593796] [2021-11-23 13:22:42,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860593796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:22:42,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131204989] [2021-11-23 13:22:42,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:22:42,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:22:42,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:22:42,808 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:22:42,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c978109-0ce5-432b-bf6d-4f6d3a3d4d9a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 13:22:43,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-23 13:22:43,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:22:43,065 WARN L261 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 289 conjunts are in the unsatisfiable core [2021-11-23 13:22:43,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:22:43,508 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 [2021-11-23 13:23:07,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:23:07,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:23:07,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:23:07,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:23:07,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:23:07,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:23:07,427 INFO L354 Elim1Store]: treesize reduction 303, result has 31.0 percent of original size [2021-11-23 13:23:07,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 98 treesize of output 167 [2021-11-23 13:23:08,490 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 9 proven. 551 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 13:23:08,490 INFO L328 TraceCheckSpWp]: Computing backward predicates...