./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/array_2-2-simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/array_2-2-simple.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU --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 c189c1cb91ea61745da6126e2d9c114f6ae511079741dc75bc227de256009336 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:17:41,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:17:41,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:17:41,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:17:41,155 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:17:41,157 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:17:41,158 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:17:41,161 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:17:41,163 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:17:41,164 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:17:41,165 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:17:41,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:17:41,167 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:17:41,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:17:41,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:17:41,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:17:41,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:17:41,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:17:41,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:17:41,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:17:41,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:17:41,185 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:17:41,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:17:41,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:17:41,191 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:17:41,192 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:17:41,192 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:17:41,193 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:17:41,194 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:17:41,202 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:17:41,202 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:17:41,203 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:17:41,205 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:17:41,206 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:17:41,208 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:17:41,208 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:17:41,209 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:17:41,209 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:17:41,209 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:17:41,210 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:17:41,210 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:17:41,211 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 23:17:41,234 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:17:41,234 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:17:41,235 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:17:41,235 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:17:41,236 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:17:41,236 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:17:41,236 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:17:41,237 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:17:41,237 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:17:41,237 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:17:41,237 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:17:41,237 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:17:41,237 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:17:41,238 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:17:41,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:17:41,238 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:17:41,238 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:17:41,238 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:17:41,239 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:17:41,239 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:17:41,239 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:17:41,239 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:17:41,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:17:41,240 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:17:41,240 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:17:41,240 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:17:41,240 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:17:41,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:17:41,240 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:17:41,241 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:17:41,241 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:17:41,241 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:17:41,241 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_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c189c1cb91ea61745da6126e2d9c114f6ae511079741dc75bc227de256009336 [2021-11-02 23:17:41,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:17:41,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:17:41,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:17:41,548 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:17:41,549 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:17:41,550 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/loop-acceleration/array_2-2-simple.i [2021-11-02 23:17:41,656 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/data/796050cd6/9f49a398a99a43d5bb4e5be6c204f260/FLAG5b25fb8df [2021-11-02 23:17:42,122 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:17:42,124 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/sv-benchmarks/c/loop-acceleration/array_2-2-simple.i [2021-11-02 23:17:42,136 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/data/796050cd6/9f49a398a99a43d5bb4e5be6c204f260/FLAG5b25fb8df [2021-11-02 23:17:42,493 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/data/796050cd6/9f49a398a99a43d5bb4e5be6c204f260 [2021-11-02 23:17:42,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:17:42,497 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:17:42,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:17:42,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:17:42,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:17:42,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:17:42" (1/1) ... [2021-11-02 23:17:42,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fd30967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:17:42, skipping insertion in model container [2021-11-02 23:17:42,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:17:42" (1/1) ... [2021-11-02 23:17:42,514 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:17:42,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:17:42,698 WARN L228 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_cfa829b6-f42e-461d-bf92-531786021054/sv-benchmarks/c/loop-acceleration/array_2-2-simple.i[809,822] [2021-11-02 23:17:42,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:17:42,720 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:17:42,730 WARN L228 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_cfa829b6-f42e-461d-bf92-531786021054/sv-benchmarks/c/loop-acceleration/array_2-2-simple.i[809,822] [2021-11-02 23:17:42,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:17:42,748 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:17:42,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:17:42 WrapperNode [2021-11-02 23:17:42,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:17:42,749 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:17:42,750 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:17:42,750 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:17:42,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:17:42" (1/1) ... [2021-11-02 23:17:42,761 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:17:42" (1/1) ... [2021-11-02 23:17:42,778 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:17:42,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:17:42,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:17:42,779 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:17:42,785 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:17:42" (1/1) ... [2021-11-02 23:17:42,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:17:42" (1/1) ... [2021-11-02 23:17:42,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:17:42" (1/1) ... [2021-11-02 23:17:42,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:17:42" (1/1) ... [2021-11-02 23:17:42,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:17:42" (1/1) ... [2021-11-02 23:17:42,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:17:42" (1/1) ... [2021-11-02 23:17:42,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:17:42" (1/1) ... [2021-11-02 23:17:42,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:17:42,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:17:42,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:17:42,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:17:42,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:17:42" (1/1) ... [2021-11-02 23:17:42,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:17:42,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:42,841 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:17:42,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:17:42,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:17:42,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-02 23:17:42,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:17:42,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 23:17:42,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:17:42,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:17:42,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 23:17:42,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 23:17:43,060 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:17:43,060 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-02 23:17:43,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:17:43 BoogieIcfgContainer [2021-11-02 23:17:43,062 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:17:43,063 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:17:43,063 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:17:43,066 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:17:43,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:17:42" (1/3) ... [2021-11-02 23:17:43,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51104ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:17:43, skipping insertion in model container [2021-11-02 23:17:43,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:17:42" (2/3) ... [2021-11-02 23:17:43,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51104ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:17:43, skipping insertion in model container [2021-11-02 23:17:43,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:17:43" (3/3) ... [2021-11-02 23:17:43,068 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-2-simple.i [2021-11-02 23:17:43,073 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:17:43,073 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 23:17:43,117 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:17:43,124 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 [2021-11-02 23:17:43,124 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 23:17:43,140 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:43,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-02 23:17:43,145 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:43,146 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-02 23:17:43,146 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:43,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:43,165 INFO L85 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2021-11-02 23:17:43,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:43,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723022857] [2021-11-02 23:17:43,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:43,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:43,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:43,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:43,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:43,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723022857] [2021-11-02 23:17:43,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723022857] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:17:43,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:17:43,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:17:43,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295698595] [2021-11-02 23:17:43,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:17:43,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:43,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:17:43,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:17:43,476 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:43,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:43,500 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-11-02 23:17:43,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:17:43,502 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-02 23:17:43,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:43,510 INFO L225 Difference]: With dead ends: 22 [2021-11-02 23:17:43,510 INFO L226 Difference]: Without dead ends: 10 [2021-11-02 23:17:43,513 INFO L786 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 [2021-11-02 23:17:43,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-02 23:17:43,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2021-11-02 23:17:43,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:43,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-02 23:17:43,544 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2021-11-02 23:17:43,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:43,544 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-02 23:17:43,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:43,545 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-02 23:17:43,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-02 23:17:43,545 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:43,546 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:43,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 23:17:43,546 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:43,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:43,547 INFO L85 PathProgramCache]: Analyzing trace with hash 265180975, now seen corresponding path program 1 times [2021-11-02 23:17:43,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:43,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944050697] [2021-11-02 23:17:43,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:43,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:43,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:43,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:43,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944050697] [2021-11-02 23:17:43,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944050697] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:43,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521353271] [2021-11-02 23:17:43,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:43,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:43,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:43,651 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:43,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 23:17:43,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:43,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:17:43,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:43,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521353271] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:43,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:43,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-02 23:17:43,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490001799] [2021-11-02 23:17:43,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:17:43,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:43,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:17:43,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:17:43,854 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:43,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:43,884 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-11-02 23:17:43,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:17:43,885 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-02 23:17:43,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:43,886 INFO L225 Difference]: With dead ends: 16 [2021-11-02 23:17:43,886 INFO L226 Difference]: Without dead ends: 12 [2021-11-02 23:17:43,887 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:17:43,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-02 23:17:43,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-11-02 23:17:43,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:43,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-11-02 23:17:43,892 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2021-11-02 23:17:43,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:43,892 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-11-02 23:17:43,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:43,894 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-11-02 23:17:43,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 23:17:43,898 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:43,898 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:43,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:44,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:44,116 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:44,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:44,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1489078833, now seen corresponding path program 2 times [2021-11-02 23:17:44,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:44,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34427489] [2021-11-02 23:17:44,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:44,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:44,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:44,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:44,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:44,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34427489] [2021-11-02 23:17:44,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34427489] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:44,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932908768] [2021-11-02 23:17:44,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:17:44,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:44,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:44,227 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:44,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 23:17:44,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:17:44,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:44,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 23:17:44,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:44,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:44,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932908768] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:44,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:44,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-02 23:17:44,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317328029] [2021-11-02 23:17:44,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:17:44,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:44,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:17:44,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:17:44,329 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:44,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:44,348 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-11-02 23:17:44,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:17:44,349 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-02 23:17:44,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:44,349 INFO L225 Difference]: With dead ends: 18 [2021-11-02 23:17:44,350 INFO L226 Difference]: Without dead ends: 14 [2021-11-02 23:17:44,355 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:17:44,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-02 23:17:44,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-11-02 23:17:44,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:44,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-11-02 23:17:44,358 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2021-11-02 23:17:44,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:44,358 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-11-02 23:17:44,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:44,359 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-11-02 23:17:44,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 23:17:44,359 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:44,360 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:44,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:44,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:44,561 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:44,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:44,561 INFO L85 PathProgramCache]: Analyzing trace with hash 833881267, now seen corresponding path program 3 times [2021-11-02 23:17:44,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:44,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224106689] [2021-11-02 23:17:44,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:44,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:44,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:44,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:44,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224106689] [2021-11-02 23:17:44,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224106689] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:44,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517183372] [2021-11-02 23:17:44,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:17:44,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:44,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:44,679 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:44,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 23:17:44,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 23:17:44,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:44,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:17:44,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:44,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517183372] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:44,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:44,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-02 23:17:44,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058780519] [2021-11-02 23:17:44,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:17:44,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:44,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:17:44,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:17:44,824 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:44,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:44,849 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-11-02 23:17:44,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:17:44,850 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-02 23:17:44,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:44,851 INFO L225 Difference]: With dead ends: 20 [2021-11-02 23:17:44,851 INFO L226 Difference]: Without dead ends: 16 [2021-11-02 23:17:44,852 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:17:44,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-02 23:17:44,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-11-02 23:17:44,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:44,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-02 23:17:44,860 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2021-11-02 23:17:44,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:44,860 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-02 23:17:44,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:44,861 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-02 23:17:44,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-02 23:17:44,861 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:44,862 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:44,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:45,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:45,087 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:45,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:45,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1745754443, now seen corresponding path program 4 times [2021-11-02 23:17:45,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:45,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869598746] [2021-11-02 23:17:45,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:45,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:45,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:45,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:45,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869598746] [2021-11-02 23:17:45,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869598746] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:45,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204501191] [2021-11-02 23:17:45,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:17:45,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:45,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:45,155 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:45,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 23:17:45,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:17:45,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:45,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:17:45,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:45,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:45,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204501191] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:45,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:45,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-02 23:17:45,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425257618] [2021-11-02 23:17:45,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:17:45,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:45,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:17:45,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:17:45,304 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:45,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:45,330 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-11-02 23:17:45,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:17:45,331 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-02 23:17:45,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:45,333 INFO L225 Difference]: With dead ends: 22 [2021-11-02 23:17:45,333 INFO L226 Difference]: Without dead ends: 18 [2021-11-02 23:17:45,334 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:17:45,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-02 23:17:45,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-11-02 23:17:45,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:45,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-11-02 23:17:45,341 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2021-11-02 23:17:45,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:45,341 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-11-02 23:17:45,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:45,341 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-11-02 23:17:45,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 23:17:45,343 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:45,343 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:45,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:45,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:45,559 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:45,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:45,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1715425335, now seen corresponding path program 5 times [2021-11-02 23:17:45,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:45,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559818266] [2021-11-02 23:17:45,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:45,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:45,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:45,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559818266] [2021-11-02 23:17:45,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559818266] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:45,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258131529] [2021-11-02 23:17:45,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:17:45,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:45,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:45,634 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:45,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 23:17:45,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-02 23:17:45,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:45,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:17:45,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:45,763 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:45,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258131529] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:45,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:45,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-02 23:17:45,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732253216] [2021-11-02 23:17:45,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:17:45,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:45,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:17:45,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:17:45,766 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:45,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:45,790 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-11-02 23:17:45,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:17:45,790 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-02 23:17:45,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:45,791 INFO L225 Difference]: With dead ends: 24 [2021-11-02 23:17:45,791 INFO L226 Difference]: Without dead ends: 20 [2021-11-02 23:17:45,792 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:17:45,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-02 23:17:45,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-11-02 23:17:45,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:45,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-11-02 23:17:45,795 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2021-11-02 23:17:45,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:45,796 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-11-02 23:17:45,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:45,796 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-11-02 23:17:45,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 23:17:45,797 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:45,797 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:45,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:46,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:46,018 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:46,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:46,018 INFO L85 PathProgramCache]: Analyzing trace with hash -690462407, now seen corresponding path program 6 times [2021-11-02 23:17:46,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:46,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634214467] [2021-11-02 23:17:46,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:46,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:46,096 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:46,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:46,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634214467] [2021-11-02 23:17:46,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634214467] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:46,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808217947] [2021-11-02 23:17:46,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:17:46,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:46,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:46,099 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:46,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 23:17:46,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-02 23:17:46,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:46,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 23:17:46,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:46,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808217947] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:46,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:46,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-02 23:17:46,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887394969] [2021-11-02 23:17:46,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:17:46,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:46,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:17:46,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:17:46,248 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:46,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:46,272 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-11-02 23:17:46,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:17:46,272 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-02 23:17:46,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:46,273 INFO L225 Difference]: With dead ends: 26 [2021-11-02 23:17:46,273 INFO L226 Difference]: Without dead ends: 22 [2021-11-02 23:17:46,274 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:17:46,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-02 23:17:46,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-11-02 23:17:46,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:46,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-11-02 23:17:46,277 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2021-11-02 23:17:46,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:46,278 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-11-02 23:17:46,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:46,278 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-11-02 23:17:46,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 23:17:46,279 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:46,279 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:46,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:46,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-02 23:17:46,507 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:46,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:46,508 INFO L85 PathProgramCache]: Analyzing trace with hash -2056177221, now seen corresponding path program 7 times [2021-11-02 23:17:46,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:46,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993815993] [2021-11-02 23:17:46,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:46,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:46,592 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:46,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:46,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993815993] [2021-11-02 23:17:46,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993815993] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:46,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140551310] [2021-11-02 23:17:46,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:17:46,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:46,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:46,608 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:46,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 23:17:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:46,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 23:17:46,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:46,778 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:46,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140551310] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:46,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:46,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-02 23:17:46,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761429333] [2021-11-02 23:17:46,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:17:46,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:46,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:17:46,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:17:46,782 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:46,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:46,818 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-11-02 23:17:46,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:17:46,819 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-02 23:17:46,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:46,820 INFO L225 Difference]: With dead ends: 28 [2021-11-02 23:17:46,820 INFO L226 Difference]: Without dead ends: 24 [2021-11-02 23:17:46,820 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:17:46,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-02 23:17:46,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-11-02 23:17:46,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 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) [2021-11-02 23:17:46,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-11-02 23:17:46,823 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2021-11-02 23:17:46,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:46,824 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-11-02 23:17:46,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:46,824 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-11-02 23:17:46,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-02 23:17:46,825 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:46,825 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:46,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:47,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-02 23:17:47,051 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:47,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:47,051 INFO L85 PathProgramCache]: Analyzing trace with hash -248120899, now seen corresponding path program 8 times [2021-11-02 23:17:47,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:47,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945272661] [2021-11-02 23:17:47,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:47,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:47,149 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:47,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:47,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945272661] [2021-11-02 23:17:47,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945272661] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:47,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296229627] [2021-11-02 23:17:47,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:17:47,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:47,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:47,151 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:47,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 23:17:47,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:17:47,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:47,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 23:17:47,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:47,339 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:47,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296229627] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:47,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:47,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-02 23:17:47,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825517140] [2021-11-02 23:17:47,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:17:47,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:47,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:17:47,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:17:47,344 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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) [2021-11-02 23:17:47,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:47,377 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-11-02 23:17:47,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 23:17:47,377 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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 22 [2021-11-02 23:17:47,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:47,378 INFO L225 Difference]: With dead ends: 30 [2021-11-02 23:17:47,378 INFO L226 Difference]: Without dead ends: 26 [2021-11-02 23:17:47,379 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:17:47,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-02 23:17:47,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-11-02 23:17:47,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 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) [2021-11-02 23:17:47,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-11-02 23:17:47,384 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2021-11-02 23:17:47,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:47,384 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-11-02 23:17:47,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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) [2021-11-02 23:17:47,385 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-11-02 23:17:47,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 23:17:47,385 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:47,386 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:47,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:47,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:47,599 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:47,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:47,599 INFO L85 PathProgramCache]: Analyzing trace with hash 2127216959, now seen corresponding path program 9 times [2021-11-02 23:17:47,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:47,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595241519] [2021-11-02 23:17:47,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:47,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:47,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:47,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:47,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595241519] [2021-11-02 23:17:47,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595241519] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:47,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507772904] [2021-11-02 23:17:47,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:17:47,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:47,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:47,735 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:47,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 23:17:47,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-02 23:17:47,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:47,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 23:17:47,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:47,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507772904] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:47,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:47,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-02 23:17:47,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974701520] [2021-11-02 23:17:47,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 23:17:47,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:47,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 23:17:47,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:17:47,943 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:47,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:47,979 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-11-02 23:17:47,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 23:17:47,979 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-02 23:17:47,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:47,982 INFO L225 Difference]: With dead ends: 32 [2021-11-02 23:17:47,983 INFO L226 Difference]: Without dead ends: 28 [2021-11-02 23:17:47,983 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:17:47,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-02 23:17:47,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-11-02 23:17:47,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:47,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-11-02 23:17:47,989 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2021-11-02 23:17:47,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:47,991 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-11-02 23:17:47,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:47,992 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-11-02 23:17:47,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 23:17:47,993 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:47,993 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:48,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:48,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 23:17:48,203 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:48,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:48,204 INFO L85 PathProgramCache]: Analyzing trace with hash -95702975, now seen corresponding path program 10 times [2021-11-02 23:17:48,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:48,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837803426] [2021-11-02 23:17:48,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:48,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:48,343 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:48,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:48,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837803426] [2021-11-02 23:17:48,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837803426] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:48,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206036873] [2021-11-02 23:17:48,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:17:48,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:48,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:48,345 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:48,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 23:17:48,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:17:48,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:48,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 23:17:48,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:48,576 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:48,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206036873] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:48,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:48,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-02 23:17:48,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167377749] [2021-11-02 23:17:48,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 23:17:48,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:48,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 23:17:48,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:17:48,578 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:48,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:48,618 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-11-02 23:17:48,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 23:17:48,619 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-02 23:17:48,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:48,620 INFO L225 Difference]: With dead ends: 34 [2021-11-02 23:17:48,620 INFO L226 Difference]: Without dead ends: 30 [2021-11-02 23:17:48,620 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:17:48,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-02 23:17:48,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-11-02 23:17:48,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:48,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-11-02 23:17:48,624 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2021-11-02 23:17:48,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:48,625 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-11-02 23:17:48,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:48,625 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-11-02 23:17:48,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 23:17:48,626 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:48,626 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:48,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:48,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:48,851 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:48,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:48,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1723013437, now seen corresponding path program 11 times [2021-11-02 23:17:48,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:48,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517443569] [2021-11-02 23:17:48,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:48,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:48,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:48,995 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:48,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:48,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517443569] [2021-11-02 23:17:48,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517443569] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:48,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221136274] [2021-11-02 23:17:48,996 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:17:48,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:48,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:48,997 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:48,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 23:17:49,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-02 23:17:49,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:49,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 23:17:49,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:49,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221136274] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:49,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:49,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-02 23:17:49,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451620346] [2021-11-02 23:17:49,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 23:17:49,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:49,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 23:17:49,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:17:49,262 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:49,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:49,305 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-11-02 23:17:49,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 23:17:49,311 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-02 23:17:49,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:49,313 INFO L225 Difference]: With dead ends: 36 [2021-11-02 23:17:49,313 INFO L226 Difference]: Without dead ends: 32 [2021-11-02 23:17:49,314 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:17:49,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-02 23:17:49,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-11-02 23:17:49,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:49,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-11-02 23:17:49,324 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2021-11-02 23:17:49,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:49,324 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-11-02 23:17:49,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:49,324 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-11-02 23:17:49,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 23:17:49,327 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:49,327 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:49,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:49,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:49,555 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:49,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:49,555 INFO L85 PathProgramCache]: Analyzing trace with hash 2094695621, now seen corresponding path program 12 times [2021-11-02 23:17:49,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:49,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255014873] [2021-11-02 23:17:49,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:49,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:49,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:49,704 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:49,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:49,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255014873] [2021-11-02 23:17:49,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255014873] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:49,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136946986] [2021-11-02 23:17:49,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:17:49,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:49,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:49,711 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:49,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 23:17:49,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-02 23:17:49,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:49,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 23:17:49,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:50,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136946986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:50,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:50,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-02 23:17:50,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190698196] [2021-11-02 23:17:50,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 23:17:50,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:50,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 23:17:50,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:17:50,077 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:50,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:50,125 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-11-02 23:17:50,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 23:17:50,125 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-02 23:17:50,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:50,133 INFO L225 Difference]: With dead ends: 38 [2021-11-02 23:17:50,133 INFO L226 Difference]: Without dead ends: 34 [2021-11-02 23:17:50,134 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:17:50,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-02 23:17:50,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-11-02 23:17:50,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:50,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-11-02 23:17:50,148 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2021-11-02 23:17:50,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:50,149 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-11-02 23:17:50,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:50,149 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-11-02 23:17:50,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 23:17:50,150 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:50,151 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:50,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:50,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-02 23:17:50,375 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:50,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:50,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1283937721, now seen corresponding path program 13 times [2021-11-02 23:17:50,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:50,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8383259] [2021-11-02 23:17:50,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:50,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:50,547 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:50,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:50,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8383259] [2021-11-02 23:17:50,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8383259] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:50,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045495787] [2021-11-02 23:17:50,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:17:50,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:50,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:50,550 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:50,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 23:17:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:50,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 23:17:50,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:50,799 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:50,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045495787] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:50,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:50,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-02 23:17:50,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339459155] [2021-11-02 23:17:50,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:17:50,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:50,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:17:50,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:17:50,801 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:50,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:50,841 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-11-02 23:17:50,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:17:50,847 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-02 23:17:50,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:50,848 INFO L225 Difference]: With dead ends: 40 [2021-11-02 23:17:50,848 INFO L226 Difference]: Without dead ends: 36 [2021-11-02 23:17:50,848 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:17:50,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-02 23:17:50,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-11-02 23:17:50,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:50,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-11-02 23:17:50,852 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2021-11-02 23:17:50,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:50,852 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-11-02 23:17:50,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:50,853 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-11-02 23:17:50,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-02 23:17:50,853 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:50,853 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:50,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:51,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-02 23:17:51,067 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:51,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:51,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1155303607, now seen corresponding path program 14 times [2021-11-02 23:17:51,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:51,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394949857] [2021-11-02 23:17:51,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:51,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:51,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:51,232 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:51,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:51,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394949857] [2021-11-02 23:17:51,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394949857] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:51,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964326184] [2021-11-02 23:17:51,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:17:51,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:51,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:51,235 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:51,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 23:17:51,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:17:51,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:51,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 23:17:51,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:51,487 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:51,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964326184] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:51,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:51,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-02 23:17:51,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480922425] [2021-11-02 23:17:51,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:17:51,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:51,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:17:51,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:17:51,490 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:51,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:51,544 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-11-02 23:17:51,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 23:17:51,544 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-02 23:17:51,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:51,545 INFO L225 Difference]: With dead ends: 42 [2021-11-02 23:17:51,545 INFO L226 Difference]: Without dead ends: 38 [2021-11-02 23:17:51,546 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:17:51,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-02 23:17:51,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-11-02 23:17:51,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:51,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-11-02 23:17:51,549 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2021-11-02 23:17:51,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:51,550 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-11-02 23:17:51,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:51,550 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-11-02 23:17:51,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 23:17:51,551 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:51,551 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:51,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:51,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 23:17:51,767 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:51,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:51,767 INFO L85 PathProgramCache]: Analyzing trace with hash -2091971637, now seen corresponding path program 15 times [2021-11-02 23:17:51,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:51,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098085394] [2021-11-02 23:17:51,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:51,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:51,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:51,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:51,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098085394] [2021-11-02 23:17:51,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098085394] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:51,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730279314] [2021-11-02 23:17:51,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:17:51,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:51,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:51,943 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:51,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 23:17:52,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-02 23:17:52,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:52,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:17:52,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:52,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730279314] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:52,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:52,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-02 23:17:52,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198186781] [2021-11-02 23:17:52,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 23:17:52,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:52,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 23:17:52,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:17:52,300 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:52,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:52,370 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-11-02 23:17:52,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 23:17:52,371 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-02 23:17:52,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:52,371 INFO L225 Difference]: With dead ends: 44 [2021-11-02 23:17:52,371 INFO L226 Difference]: Without dead ends: 40 [2021-11-02 23:17:52,372 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:17:52,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-02 23:17:52,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-11-02 23:17:52,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:52,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-11-02 23:17:52,376 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-11-02 23:17:52,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:52,376 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-11-02 23:17:52,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:52,377 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-11-02 23:17:52,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-02 23:17:52,377 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:52,377 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:52,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-02 23:17:52,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 23:17:52,599 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:52,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:52,599 INFO L85 PathProgramCache]: Analyzing trace with hash -286816307, now seen corresponding path program 16 times [2021-11-02 23:17:52,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:52,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412775449] [2021-11-02 23:17:52,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:52,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:52,807 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:52,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:52,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412775449] [2021-11-02 23:17:52,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412775449] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:52,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821765655] [2021-11-02 23:17:52,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:17:52,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:52,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:52,810 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:52,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 23:17:52,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:17:52,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:52,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 23:17:52,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:53,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821765655] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:53,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:53,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-02 23:17:53,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231874920] [2021-11-02 23:17:53,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:17:53,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:53,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:17:53,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:17:53,118 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-11-02 23:17:53,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:53,180 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-11-02 23:17:53,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 23:17:53,181 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-02 23:17:53,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:53,181 INFO L225 Difference]: With dead ends: 46 [2021-11-02 23:17:53,182 INFO L226 Difference]: Without dead ends: 42 [2021-11-02 23:17:53,182 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:17:53,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-02 23:17:53,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-11-02 23:17:53,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.025) internal successors, (41), 40 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) [2021-11-02 23:17:53,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-11-02 23:17:53,186 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2021-11-02 23:17:53,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:53,186 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-11-02 23:17:53,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-11-02 23:17:53,187 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-11-02 23:17:53,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-02 23:17:53,187 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:53,188 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:53,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:53,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 23:17:53,403 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:53,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:53,403 INFO L85 PathProgramCache]: Analyzing trace with hash -699331761, now seen corresponding path program 17 times [2021-11-02 23:17:53,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:53,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954524982] [2021-11-02 23:17:53,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:53,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:53,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:53,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:53,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954524982] [2021-11-02 23:17:53,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954524982] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:53,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198764452] [2021-11-02 23:17:53,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:17:53,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:53,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:53,625 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:53,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 23:17:53,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-02 23:17:53,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:53,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 23:17:53,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:54,051 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:54,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198764452] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:54,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:54,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-02 23:17:54,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876210620] [2021-11-02 23:17:54,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:17:54,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:54,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:17:54,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:17:54,054 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:54,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:54,122 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-11-02 23:17:54,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 23:17:54,122 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-02 23:17:54,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:54,123 INFO L225 Difference]: With dead ends: 48 [2021-11-02 23:17:54,123 INFO L226 Difference]: Without dead ends: 44 [2021-11-02 23:17:54,123 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:17:54,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-02 23:17:54,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-11-02 23:17:54,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:54,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-11-02 23:17:54,127 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2021-11-02 23:17:54,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:54,127 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-11-02 23:17:54,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:54,128 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-11-02 23:17:54,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-02 23:17:54,128 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:54,129 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:54,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:54,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:54,342 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:54,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:54,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1989691823, now seen corresponding path program 18 times [2021-11-02 23:17:54,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:54,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158211070] [2021-11-02 23:17:54,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:54,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:54,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:54,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158211070] [2021-11-02 23:17:54,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158211070] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:54,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061737976] [2021-11-02 23:17:54,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:17:54,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:54,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:54,585 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:54,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 23:17:55,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-02 23:17:55,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:55,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 23:17:55,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:55,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061737976] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:55,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:55,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-02 23:17:55,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491053695] [2021-11-02 23:17:55,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:17:55,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:55,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:17:55,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:17:55,325 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:55,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:55,379 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-11-02 23:17:55,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 23:17:55,380 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-02 23:17:55,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:55,380 INFO L225 Difference]: With dead ends: 50 [2021-11-02 23:17:55,380 INFO L226 Difference]: Without dead ends: 46 [2021-11-02 23:17:55,381 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:17:55,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-02 23:17:55,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-11-02 23:17:55,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:55,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-11-02 23:17:55,385 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2021-11-02 23:17:55,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:55,385 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-11-02 23:17:55,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:55,386 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-11-02 23:17:55,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 23:17:55,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:55,387 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:55,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:55,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:55,596 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:55,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:55,597 INFO L85 PathProgramCache]: Analyzing trace with hash -780162861, now seen corresponding path program 19 times [2021-11-02 23:17:55,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:55,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374031911] [2021-11-02 23:17:55,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:55,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:55,831 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:55,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:55,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374031911] [2021-11-02 23:17:55,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374031911] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:55,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357035287] [2021-11-02 23:17:55,832 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:17:55,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:55,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:55,834 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:55,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 23:17:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:56,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 23:17:56,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:56,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357035287] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:56,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:56,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-02 23:17:56,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983589131] [2021-11-02 23:17:56,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:17:56,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:56,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:17:56,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:17:56,170 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:56,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:56,223 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-11-02 23:17:56,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 23:17:56,223 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-02 23:17:56,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:56,224 INFO L225 Difference]: With dead ends: 52 [2021-11-02 23:17:56,224 INFO L226 Difference]: Without dead ends: 48 [2021-11-02 23:17:56,225 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:17:56,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-02 23:17:56,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-11-02 23:17:56,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:56,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-11-02 23:17:56,229 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2021-11-02 23:17:56,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:56,229 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-11-02 23:17:56,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:56,229 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-11-02 23:17:56,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-02 23:17:56,230 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:56,230 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:56,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:56,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:56,447 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:56,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:56,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1935999701, now seen corresponding path program 20 times [2021-11-02 23:17:56,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:56,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309025168] [2021-11-02 23:17:56,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:56,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:56,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:56,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309025168] [2021-11-02 23:17:56,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309025168] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:56,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858885407] [2021-11-02 23:17:56,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:17:56,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:56,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:56,717 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:56,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 23:17:56,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:17:56,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:56,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 23:17:56,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:57,075 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:57,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858885407] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:57,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:57,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-02 23:17:57,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457519783] [2021-11-02 23:17:57,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:17:57,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:57,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:17:57,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:17:57,078 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:57,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:57,139 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-11-02 23:17:57,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 23:17:57,140 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-02 23:17:57,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:57,140 INFO L225 Difference]: With dead ends: 54 [2021-11-02 23:17:57,141 INFO L226 Difference]: Without dead ends: 50 [2021-11-02 23:17:57,141 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:17:57,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-02 23:17:57,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-11-02 23:17:57,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:57,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-11-02 23:17:57,149 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2021-11-02 23:17:57,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:57,149 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-11-02 23:17:57,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:57,150 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-11-02 23:17:57,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-02 23:17:57,150 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:57,151 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:57,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:57,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:57,369 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:57,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:57,370 INFO L85 PathProgramCache]: Analyzing trace with hash 828105815, now seen corresponding path program 21 times [2021-11-02 23:17:57,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:57,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638128488] [2021-11-02 23:17:57,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:57,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:57,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:57,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:57,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638128488] [2021-11-02 23:17:57,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638128488] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:57,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217038974] [2021-11-02 23:17:57,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:17:57,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:57,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:57,643 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:57,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 23:17:58,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-11-02 23:17:58,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:58,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 23:17:58,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:58,198 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:58,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217038974] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:58,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:58,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-02 23:17:58,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725874751] [2021-11-02 23:17:58,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 23:17:58,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:58,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 23:17:58,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:17:58,201 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:58,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:58,272 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-11-02 23:17:58,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 23:17:58,279 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-02 23:17:58,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:58,280 INFO L225 Difference]: With dead ends: 56 [2021-11-02 23:17:58,280 INFO L226 Difference]: Without dead ends: 52 [2021-11-02 23:17:58,280 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:17:58,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-02 23:17:58,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-11-02 23:17:58,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:58,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-11-02 23:17:58,284 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2021-11-02 23:17:58,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:58,284 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-11-02 23:17:58,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:58,285 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-11-02 23:17:58,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 23:17:58,285 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:58,286 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:58,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:58,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-02 23:17:58,495 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:58,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:58,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1293970777, now seen corresponding path program 22 times [2021-11-02 23:17:58,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:58,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19411482] [2021-11-02 23:17:58,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:58,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:58,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:58,762 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:58,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:58,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19411482] [2021-11-02 23:17:58,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19411482] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:58,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550874483] [2021-11-02 23:17:58,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:17:58,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:58,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:58,764 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:58,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 23:17:58,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:17:58,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:58,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 23:17:58,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:59,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550874483] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:59,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:59,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-02 23:17:59,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102403611] [2021-11-02 23:17:59,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 23:17:59,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:59,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 23:17:59,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:17:59,154 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:59,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:59,221 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-11-02 23:17:59,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 23:17:59,222 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-02 23:17:59,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:59,223 INFO L225 Difference]: With dead ends: 58 [2021-11-02 23:17:59,223 INFO L226 Difference]: Without dead ends: 54 [2021-11-02 23:17:59,224 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:17:59,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-02 23:17:59,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-11-02 23:17:59,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:59,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-11-02 23:17:59,227 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2021-11-02 23:17:59,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:59,227 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-11-02 23:17:59,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:59,228 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-11-02 23:17:59,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 23:17:59,228 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:59,229 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:59,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:59,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-02 23:17:59,443 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:59,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:59,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1981366821, now seen corresponding path program 23 times [2021-11-02 23:17:59,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:59,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129149701] [2021-11-02 23:17:59,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:59,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:59,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:59,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:59,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129149701] [2021-11-02 23:17:59,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129149701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:59,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761723154] [2021-11-02 23:17:59,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:17:59,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:59,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:59,752 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:59,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-02 23:18:00,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-11-02 23:18:00,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:00,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 23:18:00,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:00,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761723154] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:00,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:00,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-11-02 23:18:00,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792383000] [2021-11-02 23:18:00,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 23:18:00,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:00,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 23:18:00,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:18:00,513 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:00,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:00,576 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-11-02 23:18:00,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 23:18:00,577 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-02 23:18:00,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:00,578 INFO L225 Difference]: With dead ends: 60 [2021-11-02 23:18:00,578 INFO L226 Difference]: Without dead ends: 56 [2021-11-02 23:18:00,578 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:18:00,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-02 23:18:00,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-11-02 23:18:00,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:00,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-11-02 23:18:00,582 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2021-11-02 23:18:00,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:00,582 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-11-02 23:18:00,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:00,583 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-11-02 23:18:00,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-02 23:18:00,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:00,584 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:00,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:00,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-02 23:18:00,799 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:00,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:00,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1369770531, now seen corresponding path program 24 times [2021-11-02 23:18:00,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:00,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964823058] [2021-11-02 23:18:00,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:00,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:01,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:01,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964823058] [2021-11-02 23:18:01,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964823058] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:01,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592057047] [2021-11-02 23:18:01,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:18:01,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:01,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:01,163 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:01,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-02 23:18:02,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-11-02 23:18:02,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:02,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-02 23:18:02,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:02,475 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:02,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592057047] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:02,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:02,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-02 23:18:02,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854660576] [2021-11-02 23:18:02,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 23:18:02,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:02,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 23:18:02,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:18:02,477 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 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) [2021-11-02 23:18:02,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:02,546 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-11-02 23:18:02,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 23:18:02,547 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-02 23:18:02,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:02,547 INFO L225 Difference]: With dead ends: 62 [2021-11-02 23:18:02,547 INFO L226 Difference]: Without dead ends: 58 [2021-11-02 23:18:02,548 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:18:02,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-02 23:18:02,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-11-02 23:18:02,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 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) [2021-11-02 23:18:02,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-11-02 23:18:02,551 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2021-11-02 23:18:02,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:02,551 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-11-02 23:18:02,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 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) [2021-11-02 23:18:02,552 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-11-02 23:18:02,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 23:18:02,553 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:02,553 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:02,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:02,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-02 23:18:02,763 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:02,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:02,763 INFO L85 PathProgramCache]: Analyzing trace with hash -2036255393, now seen corresponding path program 25 times [2021-11-02 23:18:02,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:02,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694989344] [2021-11-02 23:18:02,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:02,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:02,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:03,088 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:03,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:03,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694989344] [2021-11-02 23:18:03,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694989344] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:03,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614575173] [2021-11-02 23:18:03,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:18:03,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:03,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:03,090 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:03,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-02 23:18:03,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:03,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 23:18:03,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:03,539 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:03,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614575173] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:03,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:03,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-11-02 23:18:03,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857787044] [2021-11-02 23:18:03,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 23:18:03,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:03,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 23:18:03,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:18:03,543 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 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) [2021-11-02 23:18:03,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:03,612 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-11-02 23:18:03,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 23:18:03,612 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 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 56 [2021-11-02 23:18:03,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:03,613 INFO L225 Difference]: With dead ends: 64 [2021-11-02 23:18:03,613 INFO L226 Difference]: Without dead ends: 60 [2021-11-02 23:18:03,614 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:18:03,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-02 23:18:03,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-11-02 23:18:03,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 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) [2021-11-02 23:18:03,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-11-02 23:18:03,619 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2021-11-02 23:18:03,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:03,619 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-11-02 23:18:03,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 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) [2021-11-02 23:18:03,619 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-11-02 23:18:03,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-02 23:18:03,620 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:03,620 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:03,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:03,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:03,835 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:03,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:03,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1716886625, now seen corresponding path program 26 times [2021-11-02 23:18:03,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:03,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259121455] [2021-11-02 23:18:03,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:03,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:04,240 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:04,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:04,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259121455] [2021-11-02 23:18:04,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259121455] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:04,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765369145] [2021-11-02 23:18:04,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:18:04,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:04,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:04,242 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:04,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-02 23:18:04,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:18:04,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:04,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-02 23:18:04,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:04,731 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:04,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765369145] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:04,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:04,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-02 23:18:04,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594102704] [2021-11-02 23:18:04,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 23:18:04,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:04,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 23:18:04,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:18:04,734 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:04,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:04,814 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-11-02 23:18:04,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 23:18:04,815 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-02 23:18:04,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:04,815 INFO L225 Difference]: With dead ends: 66 [2021-11-02 23:18:04,815 INFO L226 Difference]: Without dead ends: 62 [2021-11-02 23:18:04,816 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:18:04,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-02 23:18:04,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-11-02 23:18:04,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:04,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-11-02 23:18:04,820 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2021-11-02 23:18:04,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:04,820 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-11-02 23:18:04,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:04,821 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-11-02 23:18:04,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-02 23:18:04,821 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:04,821 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:04,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:05,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:05,045 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:05,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:05,046 INFO L85 PathProgramCache]: Analyzing trace with hash 713837283, now seen corresponding path program 27 times [2021-11-02 23:18:05,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:05,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882021814] [2021-11-02 23:18:05,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:05,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:05,505 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:05,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:05,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882021814] [2021-11-02 23:18:05,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882021814] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:05,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203409918] [2021-11-02 23:18:05,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:18:05,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:05,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:05,511 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:05,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-02 23:18:06,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-11-02 23:18:06,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:06,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 23:18:06,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:06,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203409918] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:06,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:06,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-11-02 23:18:06,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587727439] [2021-11-02 23:18:06,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 23:18:06,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:06,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 23:18:06,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:18:06,529 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:06,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:06,611 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-11-02 23:18:06,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 23:18:06,613 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-02 23:18:06,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:06,613 INFO L225 Difference]: With dead ends: 68 [2021-11-02 23:18:06,613 INFO L226 Difference]: Without dead ends: 64 [2021-11-02 23:18:06,614 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:18:06,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-02 23:18:06,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-11-02 23:18:06,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:06,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-11-02 23:18:06,617 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2021-11-02 23:18:06,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:06,617 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-11-02 23:18:06,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:06,617 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-11-02 23:18:06,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-02 23:18:06,618 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:06,618 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:06,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:06,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-02 23:18:06,826 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:06,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:06,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1143906075, now seen corresponding path program 28 times [2021-11-02 23:18:06,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:06,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219984463] [2021-11-02 23:18:06,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:06,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:07,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:07,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219984463] [2021-11-02 23:18:07,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219984463] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:07,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136897612] [2021-11-02 23:18:07,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:18:07,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:07,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:07,275 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:07,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-02 23:18:07,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:18:07,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:07,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-02 23:18:07,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:07,836 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:07,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136897612] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:07,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:07,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-11-02 23:18:07,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601938928] [2021-11-02 23:18:07,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 23:18:07,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:07,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 23:18:07,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-02 23:18:07,839 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 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) [2021-11-02 23:18:07,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:07,939 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-11-02 23:18:07,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 23:18:07,939 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 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 62 [2021-11-02 23:18:07,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:07,940 INFO L225 Difference]: With dead ends: 70 [2021-11-02 23:18:07,940 INFO L226 Difference]: Without dead ends: 66 [2021-11-02 23:18:07,941 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-02 23:18:07,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-02 23:18:07,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-11-02 23:18:07,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.015625) internal successors, (65), 64 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) [2021-11-02 23:18:07,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-11-02 23:18:07,944 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2021-11-02 23:18:07,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:07,945 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-11-02 23:18:07,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 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) [2021-11-02 23:18:07,945 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-11-02 23:18:07,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 23:18:07,946 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:07,946 INFO L513 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:07,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:08,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-02 23:18:08,164 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:08,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:08,164 INFO L85 PathProgramCache]: Analyzing trace with hash 271122023, now seen corresponding path program 29 times [2021-11-02 23:18:08,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:08,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4391593] [2021-11-02 23:18:08,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:08,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:08,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:08,648 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:08,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:08,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4391593] [2021-11-02 23:18:08,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4391593] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:08,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932893750] [2021-11-02 23:18:08,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:18:08,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:08,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:08,651 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:08,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-02 23:18:11,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-11-02 23:18:11,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:11,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-02 23:18:11,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:12,056 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:12,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932893750] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:12,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:12,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-11-02 23:18:12,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611813006] [2021-11-02 23:18:12,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-02 23:18:12,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:12,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-02 23:18:12,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:18:12,062 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:12,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:12,156 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-11-02 23:18:12,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-02 23:18:12,156 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-02 23:18:12,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:12,157 INFO L225 Difference]: With dead ends: 72 [2021-11-02 23:18:12,157 INFO L226 Difference]: Without dead ends: 68 [2021-11-02 23:18:12,158 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:18:12,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-02 23:18:12,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-11-02 23:18:12,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:12,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-11-02 23:18:12,162 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2021-11-02 23:18:12,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:12,162 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-11-02 23:18:12,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:12,163 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-11-02 23:18:12,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 23:18:12,164 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:12,164 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:12,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-02 23:18:12,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:12,367 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:12,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:12,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1391508631, now seen corresponding path program 30 times [2021-11-02 23:18:12,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:12,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372004405] [2021-11-02 23:18:12,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:12,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:12,862 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:12,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:12,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372004405] [2021-11-02 23:18:12,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372004405] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:12,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204046761] [2021-11-02 23:18:12,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:18:12,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:12,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:12,867 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:12,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-02 23:18:15,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-11-02 23:18:15,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:15,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-02 23:18:15,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:16,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204046761] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:16,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:16,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-11-02 23:18:16,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353860270] [2021-11-02 23:18:16,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-02 23:18:16,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:16,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-02 23:18:16,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 23:18:16,102 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:16,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:16,190 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-11-02 23:18:16,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-02 23:18:16,191 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-02 23:18:16,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:16,191 INFO L225 Difference]: With dead ends: 74 [2021-11-02 23:18:16,191 INFO L226 Difference]: Without dead ends: 70 [2021-11-02 23:18:16,192 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 23:18:16,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-02 23:18:16,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-11-02 23:18:16,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:16,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-11-02 23:18:16,195 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2021-11-02 23:18:16,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:16,195 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-11-02 23:18:16,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:16,196 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-11-02 23:18:16,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-02 23:18:16,197 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:16,197 INFO L513 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:16,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:16,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:16,415 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:16,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:16,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1451733013, now seen corresponding path program 31 times [2021-11-02 23:18:16,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:16,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705696448] [2021-11-02 23:18:16,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:16,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:16,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:16,970 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:16,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:16,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705696448] [2021-11-02 23:18:16,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705696448] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:16,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459740517] [2021-11-02 23:18:16,970 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:18:16,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:16,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:16,974 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:16,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-02 23:18:17,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:17,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 23:18:17,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:17,761 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:17,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459740517] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:17,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:17,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-11-02 23:18:17,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768354717] [2021-11-02 23:18:17,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-02 23:18:17,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:17,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-02 23:18:17,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 23:18:17,765 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:17,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:17,869 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-11-02 23:18:17,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 23:18:17,870 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-02 23:18:17,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:17,871 INFO L225 Difference]: With dead ends: 76 [2021-11-02 23:18:17,871 INFO L226 Difference]: Without dead ends: 72 [2021-11-02 23:18:17,873 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 23:18:17,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-02 23:18:17,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-11-02 23:18:17,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 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) [2021-11-02 23:18:17,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-11-02 23:18:17,879 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2021-11-02 23:18:17,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:17,879 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-11-02 23:18:17,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:17,880 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-11-02 23:18:17,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-02 23:18:17,881 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:17,881 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:17,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:18,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-02 23:18:18,087 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:18,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:18,087 INFO L85 PathProgramCache]: Analyzing trace with hash 802178029, now seen corresponding path program 32 times [2021-11-02 23:18:18,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:18,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348009288] [2021-11-02 23:18:18,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:18,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:18,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:18,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:18,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348009288] [2021-11-02 23:18:18,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348009288] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:18,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474425589] [2021-11-02 23:18:18,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:18:18,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:18,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:18,699 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:18,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-02 23:18:19,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:18:19,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:19,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-02 23:18:19,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:19,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:19,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474425589] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:19,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:19,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-11-02 23:18:19,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064158093] [2021-11-02 23:18:19,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-02 23:18:19,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:19,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-02 23:18:19,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 23:18:19,532 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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) [2021-11-02 23:18:19,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:19,623 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-11-02 23:18:19,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-02 23:18:19,624 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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 70 [2021-11-02 23:18:19,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:19,624 INFO L225 Difference]: With dead ends: 78 [2021-11-02 23:18:19,624 INFO L226 Difference]: Without dead ends: 74 [2021-11-02 23:18:19,625 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 23:18:19,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-02 23:18:19,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-11-02 23:18:19,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 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) [2021-11-02 23:18:19,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-11-02 23:18:19,627 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2021-11-02 23:18:19,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:19,628 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-11-02 23:18:19,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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) [2021-11-02 23:18:19,628 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-11-02 23:18:19,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-02 23:18:19,629 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:19,629 INFO L513 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:19,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:19,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-02 23:18:19,831 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:19,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:19,832 INFO L85 PathProgramCache]: Analyzing trace with hash 2147172207, now seen corresponding path program 33 times [2021-11-02 23:18:19,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:19,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560424229] [2021-11-02 23:18:19,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:19,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:20,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:20,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560424229] [2021-11-02 23:18:20,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560424229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:20,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888838279] [2021-11-02 23:18:20,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:18:20,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:20,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:20,463 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:20,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-02 23:18:21,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-11-02 23:18:21,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:21,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-02 23:18:21,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:21,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:21,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888838279] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:21,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:21,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-11-02 23:18:21,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800203103] [2021-11-02 23:18:21,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-02 23:18:21,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:21,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-02 23:18:21,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 23:18:21,963 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:22,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:22,066 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-11-02 23:18:22,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-02 23:18:22,067 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-02 23:18:22,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:22,068 INFO L225 Difference]: With dead ends: 80 [2021-11-02 23:18:22,068 INFO L226 Difference]: Without dead ends: 76 [2021-11-02 23:18:22,069 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 23:18:22,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-02 23:18:22,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-11-02 23:18:22,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:22,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-11-02 23:18:22,072 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2021-11-02 23:18:22,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:22,073 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-11-02 23:18:22,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:22,073 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-11-02 23:18:22,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-02 23:18:22,074 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:22,074 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:22,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-02 23:18:22,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-02 23:18:22,299 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:22,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:22,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1901421169, now seen corresponding path program 34 times [2021-11-02 23:18:22,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:22,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039147996] [2021-11-02 23:18:22,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:22,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:22,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:22,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:22,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039147996] [2021-11-02 23:18:22,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039147996] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:22,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863740029] [2021-11-02 23:18:22,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:18:22,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:22,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:22,888 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:22,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-02 23:18:23,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:18:23,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:23,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-02 23:18:23,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:23,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:23,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863740029] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:23,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:23,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-11-02 23:18:23,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564758885] [2021-11-02 23:18:23,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-02 23:18:23,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:23,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-02 23:18:23,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 23:18:23,543 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:23,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:23,619 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-11-02 23:18:23,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-02 23:18:23,619 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-02 23:18:23,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:23,620 INFO L225 Difference]: With dead ends: 82 [2021-11-02 23:18:23,620 INFO L226 Difference]: Without dead ends: 78 [2021-11-02 23:18:23,620 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 23:18:23,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-02 23:18:23,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-11-02 23:18:23,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 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) [2021-11-02 23:18:23,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-11-02 23:18:23,623 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2021-11-02 23:18:23,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:23,624 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-11-02 23:18:23,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:23,624 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-11-02 23:18:23,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-02 23:18:23,638 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:23,638 INFO L513 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:23,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-02 23:18:23,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:23,838 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:23,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:23,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1957874931, now seen corresponding path program 35 times [2021-11-02 23:18:23,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:23,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771209954] [2021-11-02 23:18:23,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:23,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:23,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:24,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:24,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:24,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771209954] [2021-11-02 23:18:24,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771209954] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:24,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343451703] [2021-11-02 23:18:24,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:18:24,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:24,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:24,454 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:24,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-02 23:18:45,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-11-02 23:18:45,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:45,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 23:18:45,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:46,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343451703] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:46,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:46,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-11-02 23:18:46,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733378698] [2021-11-02 23:18:46,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-02 23:18:46,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:46,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-02 23:18:46,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 23:18:46,053 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:46,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:46,165 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-11-02 23:18:46,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-02 23:18:46,166 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-02 23:18:46,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:46,167 INFO L225 Difference]: With dead ends: 84 [2021-11-02 23:18:46,167 INFO L226 Difference]: Without dead ends: 80 [2021-11-02 23:18:46,168 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 23:18:46,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-02 23:18:46,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-11-02 23:18:46,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:46,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-11-02 23:18:46,171 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2021-11-02 23:18:46,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:46,172 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-11-02 23:18:46,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:46,172 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-11-02 23:18:46,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-02 23:18:46,172 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:46,172 INFO L513 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:46,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:46,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-02 23:18:46,373 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:46,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:46,374 INFO L85 PathProgramCache]: Analyzing trace with hash 375365365, now seen corresponding path program 36 times [2021-11-02 23:18:46,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:46,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721281719] [2021-11-02 23:18:46,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:46,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:46,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:46,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721281719] [2021-11-02 23:18:46,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721281719] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:46,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870598366] [2021-11-02 23:18:46,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:18:46,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:46,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:46,956 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:46,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-02 23:18:57,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-11-02 23:18:57,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:57,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-02 23:18:57,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:57,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870598366] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:57,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:57,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-11-02 23:18:57,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977697548] [2021-11-02 23:18:57,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-02 23:18:57,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:57,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-02 23:18:57,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 23:18:57,727 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 40 states, 40 states have (on average 2.025) internal successors, (81), 40 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:57,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:57,811 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-11-02 23:18:57,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-02 23:18:57,811 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 40 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-02 23:18:57,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:57,812 INFO L225 Difference]: With dead ends: 86 [2021-11-02 23:18:57,812 INFO L226 Difference]: Without dead ends: 82 [2021-11-02 23:18:57,812 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 23:18:57,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-02 23:18:57,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-11-02 23:18:57,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:57,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-11-02 23:18:57,814 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2021-11-02 23:18:57,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:57,815 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-11-02 23:18:57,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 40 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:57,815 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-11-02 23:18:57,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-02 23:18:57,815 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:57,815 INFO L513 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:57,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-11-02 23:18:58,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-02 23:18:58,016 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:58,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:58,016 INFO L85 PathProgramCache]: Analyzing trace with hash 2095223, now seen corresponding path program 37 times [2021-11-02 23:18:58,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:58,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415608906] [2021-11-02 23:18:58,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:58,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:58,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:58,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:58,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415608906] [2021-11-02 23:18:58,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415608906] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:58,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084534980] [2021-11-02 23:18:58,615 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:18:58,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:58,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:58,615 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:58,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-02 23:18:59,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:59,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-02 23:18:59,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:59,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084534980] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:59,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:59,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-11-02 23:18:59,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856799476] [2021-11-02 23:18:59,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-02 23:18:59,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:59,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-02 23:18:59,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-11-02 23:18:59,350 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 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) [2021-11-02 23:18:59,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:59,453 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-11-02 23:18:59,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-02 23:18:59,453 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 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 80 [2021-11-02 23:18:59,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:59,454 INFO L225 Difference]: With dead ends: 88 [2021-11-02 23:18:59,454 INFO L226 Difference]: Without dead ends: 84 [2021-11-02 23:18:59,455 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-11-02 23:18:59,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-02 23:18:59,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-11-02 23:18:59,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 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) [2021-11-02 23:18:59,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-11-02 23:18:59,458 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2021-11-02 23:18:59,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:59,458 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-11-02 23:18:59,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 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) [2021-11-02 23:18:59,458 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-11-02 23:18:59,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-02 23:18:59,459 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:59,459 INFO L513 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:59,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-02 23:18:59,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-02 23:18:59,673 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:59,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:59,674 INFO L85 PathProgramCache]: Analyzing trace with hash 2066741625, now seen corresponding path program 38 times [2021-11-02 23:18:59,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:59,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414416466] [2021-11-02 23:18:59,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:59,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:00,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:00,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:00,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414416466] [2021-11-02 23:19:00,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414416466] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:00,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262980812] [2021-11-02 23:19:00,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:19:00,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:00,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:00,287 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:00,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-02 23:19:00,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:19:00,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:00,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-02 23:19:00,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:01,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:01,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262980812] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:01,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:01,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-11-02 23:19:01,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602468264] [2021-11-02 23:19:01,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-02 23:19:01,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:01,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-02 23:19:01,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 23:19:01,079 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:01,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:01,182 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-11-02 23:19:01,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-02 23:19:01,183 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-02 23:19:01,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:01,184 INFO L225 Difference]: With dead ends: 90 [2021-11-02 23:19:01,184 INFO L226 Difference]: Without dead ends: 86 [2021-11-02 23:19:01,185 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 23:19:01,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-02 23:19:01,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-11-02 23:19:01,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:01,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-11-02 23:19:01,189 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2021-11-02 23:19:01,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:01,189 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-11-02 23:19:01,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:01,190 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-11-02 23:19:01,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-02 23:19:01,190 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:01,191 INFO L513 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:01,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:01,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-02 23:19:01,411 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:01,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:01,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1917043195, now seen corresponding path program 39 times [2021-11-02 23:19:01,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:01,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822266797] [2021-11-02 23:19:01,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:01,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:01,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:02,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:02,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822266797] [2021-11-02 23:19:02,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822266797] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:02,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856689198] [2021-11-02 23:19:02,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:19:02,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:02,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:02,117 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:02,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-02 23:19:04,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-11-02 23:19:04,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:04,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 23:19:04,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:04,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:04,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856689198] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:04,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:04,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-11-02 23:19:04,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321289247] [2021-11-02 23:19:04,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-02 23:19:04,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:04,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-02 23:19:04,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-11-02 23:19:04,357 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:04,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:04,478 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-11-02 23:19:04,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-02 23:19:04,478 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-02 23:19:04,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:04,479 INFO L225 Difference]: With dead ends: 92 [2021-11-02 23:19:04,479 INFO L226 Difference]: Without dead ends: 88 [2021-11-02 23:19:04,480 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-11-02 23:19:04,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-02 23:19:04,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-11-02 23:19:04,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:04,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-11-02 23:19:04,483 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2021-11-02 23:19:04,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:04,483 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-11-02 23:19:04,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:04,483 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-11-02 23:19:04,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-02 23:19:04,484 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:04,484 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:04,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:04,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-02 23:19:04,691 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:04,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:04,691 INFO L85 PathProgramCache]: Analyzing trace with hash -209227267, now seen corresponding path program 40 times [2021-11-02 23:19:04,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:04,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056098978] [2021-11-02 23:19:04,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:04,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:05,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:05,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056098978] [2021-11-02 23:19:05,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056098978] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:05,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352749659] [2021-11-02 23:19:05,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:19:05,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:05,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:05,412 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:05,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-02 23:19:06,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:19:06,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:06,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-02 23:19:06,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:06,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:06,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352749659] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:06,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:06,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-11-02 23:19:06,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618319226] [2021-11-02 23:19:06,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-02 23:19:06,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:06,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-02 23:19:06,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 23:19:06,262 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 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) [2021-11-02 23:19:06,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:06,372 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-11-02 23:19:06,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-02 23:19:06,372 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 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 86 [2021-11-02 23:19:06,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:06,373 INFO L225 Difference]: With dead ends: 94 [2021-11-02 23:19:06,373 INFO L226 Difference]: Without dead ends: 90 [2021-11-02 23:19:06,374 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 23:19:06,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-02 23:19:06,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-11-02 23:19:06,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 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) [2021-11-02 23:19:06,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-11-02 23:19:06,377 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2021-11-02 23:19:06,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:06,378 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-11-02 23:19:06,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 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) [2021-11-02 23:19:06,378 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-11-02 23:19:06,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-02 23:19:06,378 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:06,379 INFO L513 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:06,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:06,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-02 23:19:06,583 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:06,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:06,583 INFO L85 PathProgramCache]: Analyzing trace with hash 849291647, now seen corresponding path program 41 times [2021-11-02 23:19:06,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:06,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967657076] [2021-11-02 23:19:06,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:06,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:07,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:07,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:07,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967657076] [2021-11-02 23:19:07,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967657076] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:07,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56639367] [2021-11-02 23:19:07,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:19:07,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:07,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:07,283 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:07,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-02 23:19:23,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-11-02 23:19:23,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:23,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 23:19:23,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:23,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:23,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56639367] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:23,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:23,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-11-02 23:19:23,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963654817] [2021-11-02 23:19:23,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-02 23:19:23,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:23,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-02 23:19:23,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 23:19:23,812 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:23,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:23,908 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-11-02 23:19:23,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-02 23:19:23,908 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-02 23:19:23,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:23,911 INFO L225 Difference]: With dead ends: 96 [2021-11-02 23:19:23,911 INFO L226 Difference]: Without dead ends: 92 [2021-11-02 23:19:23,913 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 23:19:23,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-02 23:19:23,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-11-02 23:19:23,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:23,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-11-02 23:19:23,917 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2021-11-02 23:19:23,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:23,917 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-11-02 23:19:23,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:23,918 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-11-02 23:19:23,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-02 23:19:23,918 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:23,919 INFO L513 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:23,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:24,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-02 23:19:24,131 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:24,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:24,131 INFO L85 PathProgramCache]: Analyzing trace with hash 178718849, now seen corresponding path program 42 times [2021-11-02 23:19:24,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:24,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497533609] [2021-11-02 23:19:24,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:24,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:25,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:25,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:25,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497533609] [2021-11-02 23:19:25,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497533609] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:25,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899925422] [2021-11-02 23:19:25,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:19:25,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:25,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:25,131 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:25,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-02 23:19:45,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-11-02 23:19:45,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:45,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-02 23:19:45,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:45,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:45,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899925422] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:45,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:45,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-11-02 23:19:45,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784410674] [2021-11-02 23:19:45,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-02 23:19:45,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:45,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-02 23:19:45,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 23:19:45,413 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:45,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:45,504 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-11-02 23:19:45,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-02 23:19:45,504 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-02 23:19:45,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:45,505 INFO L225 Difference]: With dead ends: 98 [2021-11-02 23:19:45,505 INFO L226 Difference]: Without dead ends: 94 [2021-11-02 23:19:45,505 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 23:19:45,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-02 23:19:45,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-11-02 23:19:45,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:45,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-11-02 23:19:45,509 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2021-11-02 23:19:45,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:45,509 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-11-02 23:19:45,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:45,510 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-11-02 23:19:45,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-02 23:19:45,510 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:45,510 INFO L513 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:45,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-02 23:19:45,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:45,715 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:45,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:45,716 INFO L85 PathProgramCache]: Analyzing trace with hash 3354371, now seen corresponding path program 43 times [2021-11-02 23:19:45,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:45,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904043649] [2021-11-02 23:19:45,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:45,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:45,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:46,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:46,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904043649] [2021-11-02 23:19:46,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904043649] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:46,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729929645] [2021-11-02 23:19:46,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:19:46,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:46,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:46,631 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:46,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-02 23:19:47,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:47,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-02 23:19:47,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:47,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729929645] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:47,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:47,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-11-02 23:19:47,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390190236] [2021-11-02 23:19:47,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-02 23:19:47,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:47,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-02 23:19:47,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-11-02 23:19:47,775 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:47,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:47,899 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-11-02 23:19:47,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-02 23:19:47,899 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-02 23:19:47,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:47,900 INFO L225 Difference]: With dead ends: 100 [2021-11-02 23:19:47,900 INFO L226 Difference]: Without dead ends: 96 [2021-11-02 23:19:47,901 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-11-02 23:19:47,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-02 23:19:47,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-11-02 23:19:47,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:47,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-11-02 23:19:47,904 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2021-11-02 23:19:47,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:47,905 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-11-02 23:19:47,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:47,905 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-11-02 23:19:47,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-02 23:19:47,906 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:47,906 INFO L513 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:47,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:48,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:48,119 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:48,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:48,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1018184443, now seen corresponding path program 44 times [2021-11-02 23:19:48,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:48,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915126468] [2021-11-02 23:19:48,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:48,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:49,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:49,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:49,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915126468] [2021-11-02 23:19:49,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915126468] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:49,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949569282] [2021-11-02 23:19:49,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:19:49,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:49,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:49,063 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:49,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-02 23:19:49,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:19:49,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:49,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-02 23:19:49,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:50,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:50,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949569282] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:50,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:50,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-11-02 23:19:50,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043394161] [2021-11-02 23:19:50,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-02 23:19:50,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:50,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-02 23:19:50,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-11-02 23:19:50,158 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:50,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:50,304 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-11-02 23:19:50,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-02 23:19:50,305 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-02 23:19:50,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:50,306 INFO L225 Difference]: With dead ends: 102 [2021-11-02 23:19:50,306 INFO L226 Difference]: Without dead ends: 98 [2021-11-02 23:19:50,307 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-11-02 23:19:50,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-02 23:19:50,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-11-02 23:19:50,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:50,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-11-02 23:19:50,311 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2021-11-02 23:19:50,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:50,312 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-11-02 23:19:50,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:50,312 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-11-02 23:19:50,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-02 23:19:50,313 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:50,313 INFO L513 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:50,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:50,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-02 23:19:50,525 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:50,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:50,525 INFO L85 PathProgramCache]: Analyzing trace with hash 830526087, now seen corresponding path program 45 times [2021-11-02 23:19:50,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:50,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888475098] [2021-11-02 23:19:50,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:50,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:51,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:51,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888475098] [2021-11-02 23:19:51,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888475098] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:51,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617639452] [2021-11-02 23:19:51,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:19:51,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:51,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:51,400 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:51,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-02 23:19:55,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-11-02 23:19:55,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:55,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-02 23:19:55,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:55,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:55,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617639452] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:55,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:55,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-11-02 23:19:55,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226699037] [2021-11-02 23:19:55,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-02 23:19:55,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:55,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-02 23:19:55,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 23:19:55,529 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:55,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:55,653 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-11-02 23:19:55,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-02 23:19:55,654 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-02 23:19:55,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:55,654 INFO L225 Difference]: With dead ends: 104 [2021-11-02 23:19:55,654 INFO L226 Difference]: Without dead ends: 100 [2021-11-02 23:19:55,655 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 23:19:55,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-02 23:19:55,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-11-02 23:19:55,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:55,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-11-02 23:19:55,658 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2021-11-02 23:19:55,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:55,659 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-11-02 23:19:55,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:55,659 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-11-02 23:19:55,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-02 23:19:55,660 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:55,660 INFO L513 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:55,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:55,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-02 23:19:55,887 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:55,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:55,887 INFO L85 PathProgramCache]: Analyzing trace with hash -675115127, now seen corresponding path program 46 times [2021-11-02 23:19:55,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:55,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924236712] [2021-11-02 23:19:55,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:55,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:55,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:56,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:56,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:56,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924236712] [2021-11-02 23:19:56,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924236712] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:56,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831673636] [2021-11-02 23:19:56,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:19:56,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:56,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:56,976 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:56,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-02 23:19:57,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:19:57,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:57,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-02 23:19:57,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:58,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831673636] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:58,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:58,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2021-11-02 23:19:58,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069685336] [2021-11-02 23:19:58,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-02 23:19:58,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:58,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-02 23:19:58,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-11-02 23:19:58,029 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 50 states, 50 states have (on average 2.02) internal successors, (101), 50 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:58,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:58,148 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-11-02 23:19:58,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-02 23:19:58,148 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 50 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-02 23:19:58,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:58,149 INFO L225 Difference]: With dead ends: 106 [2021-11-02 23:19:58,149 INFO L226 Difference]: Without dead ends: 102 [2021-11-02 23:19:58,150 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-11-02 23:19:58,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-02 23:19:58,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-11-02 23:19:58,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:58,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-11-02 23:19:58,155 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2021-11-02 23:19:58,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:58,155 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-11-02 23:19:58,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 50 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:58,156 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-11-02 23:19:58,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-02 23:19:58,157 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:58,157 INFO L513 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:58,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-11-02 23:19:58,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:58,371 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:58,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:58,371 INFO L85 PathProgramCache]: Analyzing trace with hash -192343029, now seen corresponding path program 47 times [2021-11-02 23:19:58,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:58,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543761450] [2021-11-02 23:19:58,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:58,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:59,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:59,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543761450] [2021-11-02 23:19:59,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543761450] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:59,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918603151] [2021-11-02 23:19:59,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:19:59,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:59,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:59,299 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:59,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-02 23:20:14,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2021-11-02 23:20:14,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:15,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 23:20:15,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:15,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:15,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918603151] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:15,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:15,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-11-02 23:20:15,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343680360] [2021-11-02 23:20:15,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-02 23:20:15,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:15,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-02 23:20:15,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-11-02 23:20:15,358 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:15,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:15,497 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-11-02 23:20:15,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-02 23:20:15,497 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-02 23:20:15,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:15,498 INFO L225 Difference]: With dead ends: 108 [2021-11-02 23:20:15,498 INFO L226 Difference]: Without dead ends: 104 [2021-11-02 23:20:15,498 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-11-02 23:20:15,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-02 23:20:15,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-11-02 23:20:15,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:15,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2021-11-02 23:20:15,503 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2021-11-02 23:20:15,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:15,503 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2021-11-02 23:20:15,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:15,503 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2021-11-02 23:20:15,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-02 23:20:15,504 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:15,504 INFO L513 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:15,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:15,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:15,707 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:15,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:15,707 INFO L85 PathProgramCache]: Analyzing trace with hash -104824819, now seen corresponding path program 48 times [2021-11-02 23:20:15,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:15,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882291146] [2021-11-02 23:20:15,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:15,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:16,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:16,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882291146] [2021-11-02 23:20:16,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882291146] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:16,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147396908] [2021-11-02 23:20:16,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:20:16,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:16,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:16,762 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:16,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-02 23:20:58,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-11-02 23:20:58,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:58,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-02 23:20:58,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:58,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147396908] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:58,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:58,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-11-02 23:20:58,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340408970] [2021-11-02 23:20:58,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-02 23:20:58,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:58,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-02 23:20:58,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-11-02 23:20:58,422 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:58,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:58,594 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2021-11-02 23:20:58,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-02 23:20:58,595 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-02 23:20:58,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:58,596 INFO L225 Difference]: With dead ends: 110 [2021-11-02 23:20:58,596 INFO L226 Difference]: Without dead ends: 106 [2021-11-02 23:20:58,598 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-11-02 23:20:58,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-02 23:20:58,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-11-02 23:20:58,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:58,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2021-11-02 23:20:58,602 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2021-11-02 23:20:58,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:58,603 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2021-11-02 23:20:58,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:58,604 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2021-11-02 23:20:58,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-02 23:20:58,605 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:58,606 INFO L513 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:58,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:58,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:58,831 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:58,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:58,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1899170929, now seen corresponding path program 49 times [2021-11-02 23:20:58,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:58,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973705023] [2021-11-02 23:20:58,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:58,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:58,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:59,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:59,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:59,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973705023] [2021-11-02 23:20:59,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973705023] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:59,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973177927] [2021-11-02 23:20:59,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:20:59,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:59,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:59,993 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:59,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-02 23:21:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:00,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-02 23:21:00,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:01,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:01,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973177927] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:01,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:21:01,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2021-11-02 23:21:01,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347960888] [2021-11-02 23:21:01,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-02 23:21:01,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:01,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-02 23:21:01,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-11-02 23:21:01,210 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:01,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:01,376 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2021-11-02 23:21:01,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-02 23:21:01,377 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-02 23:21:01,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:01,379 INFO L225 Difference]: With dead ends: 112 [2021-11-02 23:21:01,380 INFO L226 Difference]: Without dead ends: 108 [2021-11-02 23:21:01,380 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-11-02 23:21:01,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-02 23:21:01,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-11-02 23:21:01,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.009433962264151) internal successors, (107), 106 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:01,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2021-11-02 23:21:01,384 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2021-11-02 23:21:01,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:01,385 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2021-11-02 23:21:01,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:01,385 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2021-11-02 23:21:01,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-02 23:21:01,386 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:01,386 INFO L513 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:01,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-02 23:21:01,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-02 23:21:01,599 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:01,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:01,599 INFO L85 PathProgramCache]: Analyzing trace with hash 311070353, now seen corresponding path program 50 times [2021-11-02 23:21:01,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:01,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335875488] [2021-11-02 23:21:01,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:01,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:01,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:03,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:03,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:03,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335875488] [2021-11-02 23:21:03,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335875488] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:03,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020610111] [2021-11-02 23:21:03,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:21:03,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:03,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:03,089 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:03,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-02 23:21:04,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:21:04,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:21:04,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-02 23:21:04,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:04,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:04,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020610111] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:04,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:21:04,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2021-11-02 23:21:04,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365953616] [2021-11-02 23:21:04,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-02 23:21:04,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:04,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-02 23:21:04,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 23:21:04,297 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:04,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:04,491 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2021-11-02 23:21:04,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-02 23:21:04,491 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-02 23:21:04,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:04,493 INFO L225 Difference]: With dead ends: 114 [2021-11-02 23:21:04,493 INFO L226 Difference]: Without dead ends: 110 [2021-11-02 23:21:04,494 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 23:21:04,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-02 23:21:04,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-11-02 23:21:04,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0092592592592593) internal successors, (109), 108 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:04,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2021-11-02 23:21:04,499 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2021-11-02 23:21:04,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:04,499 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2021-11-02 23:21:04,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:04,500 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2021-11-02 23:21:04,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-02 23:21:04,501 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:04,501 INFO L513 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:04,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-02 23:21:04,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:04,727 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:04,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:04,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1655869165, now seen corresponding path program 51 times [2021-11-02 23:21:04,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:04,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236848140] [2021-11-02 23:21:04,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:04,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:05,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:05,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236848140] [2021-11-02 23:21:05,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236848140] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:05,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92525250] [2021-11-02 23:21:05,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:21:05,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:05,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:05,882 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:05,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-02 23:21:10,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2021-11-02 23:21:10,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:21:10,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-02 23:21:10,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:11,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92525250] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:11,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:21:11,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2021-11-02 23:21:11,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896866937] [2021-11-02 23:21:11,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-02 23:21:11,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:11,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-02 23:21:11,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-11-02 23:21:11,175 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:11,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:11,316 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2021-11-02 23:21:11,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-02 23:21:11,316 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-11-02 23:21:11,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:11,317 INFO L225 Difference]: With dead ends: 116 [2021-11-02 23:21:11,317 INFO L226 Difference]: Without dead ends: 112 [2021-11-02 23:21:11,318 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-11-02 23:21:11,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-02 23:21:11,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-11-02 23:21:11,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.009090909090909) internal successors, (111), 110 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:11,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2021-11-02 23:21:11,322 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2021-11-02 23:21:11,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:11,323 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2021-11-02 23:21:11,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:11,323 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2021-11-02 23:21:11,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-02 23:21:11,324 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:11,324 INFO L513 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:11,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-02 23:21:11,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:11,539 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:11,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:11,539 INFO L85 PathProgramCache]: Analyzing trace with hash -2099135723, now seen corresponding path program 52 times [2021-11-02 23:21:11,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:11,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487724778] [2021-11-02 23:21:11,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:11,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:11,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:12,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:12,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487724778] [2021-11-02 23:21:12,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487724778] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:12,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945495205] [2021-11-02 23:21:12,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:21:12,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:12,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:12,802 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:12,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-02 23:21:13,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:21:13,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:21:13,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-02 23:21:13,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:14,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:14,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945495205] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:14,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:21:14,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2021-11-02 23:21:14,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103247267] [2021-11-02 23:21:14,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-02 23:21:14,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:14,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-02 23:21:14,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-11-02 23:21:14,107 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 56 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:14,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:14,289 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2021-11-02 23:21:14,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-02 23:21:14,290 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 56 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-02 23:21:14,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:14,291 INFO L225 Difference]: With dead ends: 118 [2021-11-02 23:21:14,291 INFO L226 Difference]: Without dead ends: 114 [2021-11-02 23:21:14,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-11-02 23:21:14,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-02 23:21:14,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-11-02 23:21:14,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0089285714285714) internal successors, (113), 112 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:14,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2021-11-02 23:21:14,296 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2021-11-02 23:21:14,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:14,297 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2021-11-02 23:21:14,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 56 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:14,297 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2021-11-02 23:21:14,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-02 23:21:14,298 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:14,298 INFO L513 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:14,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-02 23:21:14,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:14,514 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:14,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:14,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1418431639, now seen corresponding path program 53 times [2021-11-02 23:21:14,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:14,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86958758] [2021-11-02 23:21:14,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:14,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:15,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:15,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86958758] [2021-11-02 23:21:15,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86958758] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:15,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724859476] [2021-11-02 23:21:15,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:21:15,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:15,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:15,712 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:15,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-02 23:24:37,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2021-11-02 23:24:37,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:24:37,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-02 23:24:37,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:24:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:24:37,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724859476] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:24:37,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:24:37,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2021-11-02 23:24:37,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117477752] [2021-11-02 23:24:37,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-02 23:24:37,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:24:37,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-02 23:24:37,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-11-02 23:24:37,639 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 57 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:37,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:24:37,756 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2021-11-02 23:24:37,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-02 23:24:37,757 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 57 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-02 23:24:37,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:24:37,757 INFO L225 Difference]: With dead ends: 120 [2021-11-02 23:24:37,757 INFO L226 Difference]: Without dead ends: 116 [2021-11-02 23:24:37,758 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-11-02 23:24:37,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-02 23:24:37,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-11-02 23:24:37,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0087719298245614) internal successors, (115), 114 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:37,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2021-11-02 23:24:37,762 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2021-11-02 23:24:37,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:24:37,763 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2021-11-02 23:24:37,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 57 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:37,763 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2021-11-02 23:24:37,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-02 23:24:37,764 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:24:37,764 INFO L513 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1] [2021-11-02 23:24:37,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-11-02 23:24:37,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:24:37,979 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:24:37,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:24:37,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1661404569, now seen corresponding path program 54 times [2021-11-02 23:24:37,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:24:37,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175560565] [2021-11-02 23:24:37,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:24:37,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:24:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:24:39,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:24:39,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:24:39,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175560565] [2021-11-02 23:24:39,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175560565] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:24:39,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440670072] [2021-11-02 23:24:39,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:24:39,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:24:39,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:24:39,219 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:24:39,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-02 23:26:02,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2021-11-02 23:26:02,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:26:02,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-02 23:26:02,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:26:02,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:26:02,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440670072] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:02,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:26:02,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2021-11-02 23:26:02,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020662262] [2021-11-02 23:26:02,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-02 23:26:02,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:26:02,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-02 23:26:02,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-11-02 23:26:02,921 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 58 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:03,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:26:03,072 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2021-11-02 23:26:03,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-02 23:26:03,073 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 58 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-02 23:26:03,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:26:03,075 INFO L225 Difference]: With dead ends: 122 [2021-11-02 23:26:03,075 INFO L226 Difference]: Without dead ends: 118 [2021-11-02 23:26:03,075 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-11-02 23:26:03,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-02 23:26:03,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2021-11-02 23:26:03,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0086206896551724) internal successors, (117), 116 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:03,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2021-11-02 23:26:03,079 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2021-11-02 23:26:03,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:26:03,080 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2021-11-02 23:26:03,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 58 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:03,080 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2021-11-02 23:26:03,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-02 23:26:03,081 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:26:03,081 INFO L513 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1] [2021-11-02 23:26:03,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-11-02 23:26:03,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-02 23:26:03,287 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:26:03,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:26:03,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1064810981, now seen corresponding path program 55 times [2021-11-02 23:26:03,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:26:03,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557584695] [2021-11-02 23:26:03,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:26:03,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:26:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:26:04,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:26:04,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:26:04,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557584695] [2021-11-02 23:26:04,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557584695] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:04,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761582673] [2021-11-02 23:26:04,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:26:04,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:26:04,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:26:04,594 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:26:04,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-02 23:26:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:26:05,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-02 23:26:05,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:26:06,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:26:06,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761582673] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:06,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:26:06,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2021-11-02 23:26:06,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864040697] [2021-11-02 23:26:06,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-02 23:26:06,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:26:06,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-02 23:26:06,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-11-02 23:26:06,269 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:06,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:26:06,473 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2021-11-02 23:26:06,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-02 23:26:06,473 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-02 23:26:06,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:26:06,474 INFO L225 Difference]: With dead ends: 124 [2021-11-02 23:26:06,474 INFO L226 Difference]: Without dead ends: 120 [2021-11-02 23:26:06,474 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-11-02 23:26:06,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-02 23:26:06,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-11-02 23:26:06,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0084745762711864) internal successors, (119), 118 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:06,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2021-11-02 23:26:06,479 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2021-11-02 23:26:06,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:26:06,479 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2021-11-02 23:26:06,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:06,480 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2021-11-02 23:26:06,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-02 23:26:06,481 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:26:06,481 INFO L513 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1] [2021-11-02 23:26:06,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-02 23:26:06,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:26:06,696 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:26:06,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:26:06,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1027903971, now seen corresponding path program 56 times [2021-11-02 23:26:06,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:26:06,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913668002] [2021-11-02 23:26:06,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:26:06,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:26:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:26:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:26:08,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:26:08,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913668002] [2021-11-02 23:26:08,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913668002] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:08,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916522912] [2021-11-02 23:26:08,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:26:08,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:26:08,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:26:08,243 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:26:08,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-02 23:26:09,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:26:09,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:26:09,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-02 23:26:09,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:26:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:26:09,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916522912] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:09,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:26:09,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2021-11-02 23:26:09,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702962521] [2021-11-02 23:26:09,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-02 23:26:09,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:26:09,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-02 23:26:09,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-11-02 23:26:09,841 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 60 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:09,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:26:09,993 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2021-11-02 23:26:09,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-02 23:26:09,994 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 60 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-02 23:26:09,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:26:09,995 INFO L225 Difference]: With dead ends: 126 [2021-11-02 23:26:09,995 INFO L226 Difference]: Without dead ends: 122 [2021-11-02 23:26:09,995 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-11-02 23:26:09,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-02 23:26:10,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2021-11-02 23:26:10,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0083333333333333) internal successors, (121), 120 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:10,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2021-11-02 23:26:10,012 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2021-11-02 23:26:10,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:26:10,012 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2021-11-02 23:26:10,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 60 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:10,013 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2021-11-02 23:26:10,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-02 23:26:10,014 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:26:10,014 INFO L513 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1] [2021-11-02 23:26:10,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-02 23:26:10,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:26:10,239 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:26:10,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:26:10,239 INFO L85 PathProgramCache]: Analyzing trace with hash 79994271, now seen corresponding path program 57 times [2021-11-02 23:26:10,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:26:10,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117301] [2021-11-02 23:26:10,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:26:10,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:26:10,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:26:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:26:11,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:26:11,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117301] [2021-11-02 23:26:11,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117301] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:11,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026132288] [2021-11-02 23:26:11,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:26:11,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:26:11,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:26:11,770 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:26:11,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-02 23:26:20,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2021-11-02 23:26:20,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:26:20,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-02 23:26:20,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:26:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:26:21,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026132288] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:21,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:26:21,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2021-11-02 23:26:21,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191844536] [2021-11-02 23:26:21,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-02 23:26:21,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:26:21,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-02 23:26:21,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-11-02 23:26:21,316 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 61 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:21,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:26:21,530 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2021-11-02 23:26:21,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-02 23:26:21,531 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 61 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-11-02 23:26:21,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:26:21,532 INFO L225 Difference]: With dead ends: 128 [2021-11-02 23:26:21,532 INFO L226 Difference]: Without dead ends: 124 [2021-11-02 23:26:21,533 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-11-02 23:26:21,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-02 23:26:21,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2021-11-02 23:26:21,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0081967213114753) internal successors, (123), 122 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:21,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2021-11-02 23:26:21,539 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2021-11-02 23:26:21,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:26:21,539 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2021-11-02 23:26:21,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 61 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:21,540 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2021-11-02 23:26:21,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-02 23:26:21,541 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:26:21,541 INFO L513 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1] [2021-11-02 23:26:21,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-02 23:26:21,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-02 23:26:21,763 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:26:21,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:26:21,763 INFO L85 PathProgramCache]: Analyzing trace with hash -381684575, now seen corresponding path program 58 times [2021-11-02 23:26:21,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:26:21,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802028904] [2021-11-02 23:26:21,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:26:21,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:26:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:26:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:26:23,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:26:23,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802028904] [2021-11-02 23:26:23,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802028904] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:23,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345473407] [2021-11-02 23:26:23,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:26:23,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:26:23,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:26:23,827 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:26:23,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-02 23:26:25,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:26:25,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:26:25,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-02 23:26:25,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:26:25,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:26:25,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345473407] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:25,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:26:25,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2021-11-02 23:26:25,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708602238] [2021-11-02 23:26:25,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-02 23:26:25,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:26:25,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-02 23:26:25,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-11-02 23:26:25,543 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:25,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:26:25,713 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2021-11-02 23:26:25,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-02 23:26:25,714 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-11-02 23:26:25,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:26:25,715 INFO L225 Difference]: With dead ends: 130 [2021-11-02 23:26:25,715 INFO L226 Difference]: Without dead ends: 126 [2021-11-02 23:26:25,716 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-11-02 23:26:25,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-02 23:26:25,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2021-11-02 23:26:25,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0080645161290323) internal successors, (125), 124 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:25,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2021-11-02 23:26:25,741 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2021-11-02 23:26:25,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:26:25,742 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2021-11-02 23:26:25,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:25,742 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2021-11-02 23:26:25,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-02 23:26:25,743 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:26:25,744 INFO L513 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1] [2021-11-02 23:26:25,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-02 23:26:25,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-02 23:26:25,971 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:26:25,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:26:25,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1673424093, now seen corresponding path program 59 times [2021-11-02 23:26:25,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:26:25,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587766688] [2021-11-02 23:26:25,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:26:25,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:26:26,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:26:27,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:26:27,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:26:27,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587766688] [2021-11-02 23:26:27,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587766688] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:27,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350370458] [2021-11-02 23:26:27,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:26:27,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:26:27,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:26:27,608 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:26:27,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfa829b6-f42e-461d-bf92-531786021054/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process