./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy4_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy4_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX --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 4a66002bd28db929747d199b9986ccd34ccce90ecf5386b8e2342838dba13a02 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:30:37,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:30:37,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:30:37,120 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:30:37,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:30:37,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:30:37,129 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:30:37,134 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:30:37,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:30:37,144 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:30:37,146 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:30:37,147 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:30:37,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:30:37,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:30:37,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:30:37,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:30:37,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:30:37,161 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:30:37,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:30:37,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:30:37,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:30:37,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:30:37,181 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:30:37,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:30:37,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:30:37,190 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:30:37,190 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:30:37,192 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:30:37,193 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:30:37,195 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:30:37,196 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:30:37,197 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:30:37,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:30:37,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:30:37,202 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:30:37,202 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:30:37,203 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:30:37,203 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:30:37,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:30:37,205 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:30:37,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:30:37,206 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:30:37,258 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:30:37,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:30:37,259 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:30:37,259 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:30:37,267 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:30:37,268 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:30:37,268 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:30:37,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:30:37,269 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:30:37,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:30:37,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:30:37,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:30:37,271 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:30:37,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:30:37,271 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:30:37,271 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:30:37,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:30:37,272 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:30:37,272 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:30:37,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:30:37,273 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:30:37,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:30:37,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:30:37,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:30:37,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:30:37,274 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:30:37,274 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:30:37,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:30:37,275 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:30:37,275 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:30:37,275 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:30:37,275 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:30:37,276 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_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a66002bd28db929747d199b9986ccd34ccce90ecf5386b8e2342838dba13a02 [2021-11-09 08:30:37,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:30:37,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:30:37,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:30:37,597 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:30:37,598 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:30:37,599 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-examples/standard_copy4_ground-2.i [2021-11-09 08:30:37,675 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/data/eeb519203/17b837bd59904c27b7db361f021249b5/FLAGe0933e270 [2021-11-09 08:30:38,108 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:30:38,109 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/sv-benchmarks/c/array-examples/standard_copy4_ground-2.i [2021-11-09 08:30:38,127 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/data/eeb519203/17b837bd59904c27b7db361f021249b5/FLAGe0933e270 [2021-11-09 08:30:38,506 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/data/eeb519203/17b837bd59904c27b7db361f021249b5 [2021-11-09 08:30:38,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:30:38,509 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:30:38,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:30:38,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:30:38,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:30:38,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:30:38" (1/1) ... [2021-11-09 08:30:38,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76c63674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:38, skipping insertion in model container [2021-11-09 08:30:38,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:30:38" (1/1) ... [2021-11-09 08:30:38,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:30:38,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:30:38,696 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_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/sv-benchmarks/c/array-examples/standard_copy4_ground-2.i[816,829] [2021-11-09 08:30:38,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:30:38,727 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:30:38,742 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_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/sv-benchmarks/c/array-examples/standard_copy4_ground-2.i[816,829] [2021-11-09 08:30:38,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:30:38,772 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:30:38,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:38 WrapperNode [2021-11-09 08:30:38,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:30:38,774 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:30:38,775 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:30:38,775 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:30:38,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:38" (1/1) ... [2021-11-09 08:30:38,803 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:38" (1/1) ... [2021-11-09 08:30:38,826 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:30:38,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:30:38,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:30:38,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:30:38,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:38" (1/1) ... [2021-11-09 08:30:38,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:38" (1/1) ... [2021-11-09 08:30:38,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:38" (1/1) ... [2021-11-09 08:30:38,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:38" (1/1) ... [2021-11-09 08:30:38,845 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:38" (1/1) ... [2021-11-09 08:30:38,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:38" (1/1) ... [2021-11-09 08:30:38,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:38" (1/1) ... [2021-11-09 08:30:38,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:30:38,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:30:38,867 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:30:38,867 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:30:38,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:38" (1/1) ... [2021-11-09 08:30:38,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:30:38,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:38,899 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:30:38,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:30:38,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:30:38,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:30:38,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 08:30:38,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:30:38,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:30:38,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 08:30:38,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 08:30:39,189 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:30:39,189 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-11-09 08:30:39,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:30:39 BoogieIcfgContainer [2021-11-09 08:30:39,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:30:39,193 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:30:39,193 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:30:39,197 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:30:39,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:30:38" (1/3) ... [2021-11-09 08:30:39,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b2be05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:30:39, skipping insertion in model container [2021-11-09 08:30:39,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:38" (2/3) ... [2021-11-09 08:30:39,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b2be05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:30:39, skipping insertion in model container [2021-11-09 08:30:39,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:30:39" (3/3) ... [2021-11-09 08:30:39,200 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy4_ground-2.i [2021-11-09 08:30:39,206 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:30:39,206 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 08:30:39,255 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:30:39,263 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 [2021-11-09 08:30:39,263 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 08:30:39,299 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.56) internal successors, (39), 26 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) [2021-11-09 08:30:39,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 08:30:39,305 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:39,306 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:39,306 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:39,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:39,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1890477095, now seen corresponding path program 1 times [2021-11-09 08:30:39,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:39,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248506555] [2021-11-09 08:30:39,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:39,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:39,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:39,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:39,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248506555] [2021-11-09 08:30:39,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248506555] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:39,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:39,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:30:39,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605890384] [2021-11-09 08:30:39,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:30:39,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:39,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:30:39,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:30:39,644 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.56) internal successors, (39), 26 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) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2021-11-09 08:30:39,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:39,686 INFO L93 Difference]: Finished difference Result 52 states and 76 transitions. [2021-11-09 08:30:39,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:30:39,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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 15 [2021-11-09 08:30:39,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:39,701 INFO L225 Difference]: With dead ends: 52 [2021-11-09 08:30:39,701 INFO L226 Difference]: Without dead ends: 25 [2021-11-09 08:30:39,704 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 [2021-11-09 08:30:39,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-09 08:30:39,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-11-09 08:30:39,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 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) [2021-11-09 08:30:39,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-11-09 08:30:39,743 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2021-11-09 08:30:39,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:39,744 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-11-09 08:30:39,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2021-11-09 08:30:39,745 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-11-09 08:30:39,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-09 08:30:39,746 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:39,746 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:39,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:30:39,749 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:39,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:39,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1812867813, now seen corresponding path program 1 times [2021-11-09 08:30:39,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:39,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574611043] [2021-11-09 08:30:39,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:39,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:39,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:39,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:39,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574611043] [2021-11-09 08:30:39,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574611043] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:39,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137516538] [2021-11-09 08:30:39,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:39,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:39,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:39,862 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:39,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:30:39,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:39,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:30:39,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:40,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:30:40,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137516538] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:40,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:30:40,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-09 08:30:40,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189268735] [2021-11-09 08:30:40,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:30:40,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:40,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:30:40,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:30:40,036 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) [2021-11-09 08:30:40,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:40,098 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2021-11-09 08:30:40,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:30:40,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 17 [2021-11-09 08:30:40,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:40,100 INFO L225 Difference]: With dead ends: 48 [2021-11-09 08:30:40,100 INFO L226 Difference]: Without dead ends: 32 [2021-11-09 08:30:40,102 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:30:40,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-09 08:30:40,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-11-09 08:30:40,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 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) [2021-11-09 08:30:40,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-11-09 08:30:40,115 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 17 [2021-11-09 08:30:40,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:40,115 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-11-09 08:30:40,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) [2021-11-09 08:30:40,116 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-11-09 08:30:40,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 08:30:40,121 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:40,121 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:40,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:40,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:40,322 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:40,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:40,323 INFO L85 PathProgramCache]: Analyzing trace with hash -2029995939, now seen corresponding path program 1 times [2021-11-09 08:30:40,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:40,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121692640] [2021-11-09 08:30:40,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:40,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:40,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:30:40,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:40,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121692640] [2021-11-09 08:30:40,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121692640] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:40,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15576088] [2021-11-09 08:30:40,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:40,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:40,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:40,395 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:40,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:30:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:40,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:30:40,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:30:40,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15576088] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:40,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:40,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-09 08:30:40,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628523923] [2021-11-09 08:30:40,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:30:40,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:40,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:30:40,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:30:40,581 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:40,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:40,599 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2021-11-09 08:30:40,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:30:40,600 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-09 08:30:40,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:40,600 INFO L225 Difference]: With dead ends: 54 [2021-11-09 08:30:40,601 INFO L226 Difference]: Without dead ends: 31 [2021-11-09 08:30:40,601 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:30:40,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-09 08:30:40,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-11-09 08:30:40,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 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) [2021-11-09 08:30:40,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-11-09 08:30:40,605 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 25 [2021-11-09 08:30:40,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:40,606 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-11-09 08:30:40,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:40,606 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-11-09 08:30:40,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 08:30:40,607 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:40,607 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:40,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:40,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:40,835 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:40,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:40,835 INFO L85 PathProgramCache]: Analyzing trace with hash 2073930139, now seen corresponding path program 2 times [2021-11-09 08:30:40,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:40,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812262162] [2021-11-09 08:30:40,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:40,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:40,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 08:30:40,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:40,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812262162] [2021-11-09 08:30:40,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812262162] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:40,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974852330] [2021-11-09 08:30:40,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:30:40,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:40,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:40,946 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:40,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:30:41,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:30:41,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:41,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:30:41,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:41,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 08:30:41,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974852330] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:41,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:41,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-09 08:30:41,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774089304] [2021-11-09 08:30:41,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:30:41,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:41,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:30:41,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:30:41,125 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 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) [2021-11-09 08:30:41,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:41,217 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2021-11-09 08:30:41,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:30:41,218 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 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 27 [2021-11-09 08:30:41,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:41,219 INFO L225 Difference]: With dead ends: 61 [2021-11-09 08:30:41,219 INFO L226 Difference]: Without dead ends: 42 [2021-11-09 08:30:41,219 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:30:41,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-09 08:30:41,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2021-11-09 08:30:41,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 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) [2021-11-09 08:30:41,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-11-09 08:30:41,236 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 27 [2021-11-09 08:30:41,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:41,237 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-11-09 08:30:41,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 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) [2021-11-09 08:30:41,237 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-11-09 08:30:41,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 08:30:41,239 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:41,239 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:41,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:41,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:41,455 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:41,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:41,455 INFO L85 PathProgramCache]: Analyzing trace with hash -662535917, now seen corresponding path program 3 times [2021-11-09 08:30:41,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:41,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897450221] [2021-11-09 08:30:41,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:41,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:41,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:41,582 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:30:41,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:41,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897450221] [2021-11-09 08:30:41,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897450221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:41,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527437527] [2021-11-09 08:30:41,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:30:41,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:41,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:41,585 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:41,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:30:41,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 08:30:41,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:41,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:30:41,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:30:41,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527437527] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:41,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:41,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-09 08:30:41,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472362553] [2021-11-09 08:30:41,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:30:41,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:41,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:30:41,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:30:41,808 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:41,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:41,828 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2021-11-09 08:30:41,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:30:41,828 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-09 08:30:41,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:41,829 INFO L225 Difference]: With dead ends: 72 [2021-11-09 08:30:41,829 INFO L226 Difference]: Without dead ends: 41 [2021-11-09 08:30:41,830 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:30:41,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-09 08:30:41,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-11-09 08:30:41,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 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) [2021-11-09 08:30:41,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-11-09 08:30:41,835 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 35 [2021-11-09 08:30:41,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:41,835 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-11-09 08:30:41,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:41,835 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-11-09 08:30:41,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 08:30:41,836 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:41,836 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:41,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:42,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:42,051 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:42,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:42,051 INFO L85 PathProgramCache]: Analyzing trace with hash 365526225, now seen corresponding path program 4 times [2021-11-09 08:30:42,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:42,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698744493] [2021-11-09 08:30:42,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:42,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:42,144 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:30:42,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:42,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698744493] [2021-11-09 08:30:42,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698744493] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:42,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551411928] [2021-11-09 08:30:42,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:30:42,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:42,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:42,147 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:42,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 08:30:42,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:30:42,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:42,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:30:42,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:30:42,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551411928] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:42,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:42,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-09 08:30:42,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345477235] [2021-11-09 08:30:42,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:30:42,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:42,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:30:42,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:30:42,342 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:42,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:42,369 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2021-11-09 08:30:42,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:30:42,369 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 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 37 [2021-11-09 08:30:42,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:42,371 INFO L225 Difference]: With dead ends: 74 [2021-11-09 08:30:42,372 INFO L226 Difference]: Without dead ends: 43 [2021-11-09 08:30:42,373 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:30:42,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-09 08:30:42,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-11-09 08:30:42,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 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) [2021-11-09 08:30:42,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-11-09 08:30:42,384 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 37 [2021-11-09 08:30:42,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:42,384 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-11-09 08:30:42,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:42,384 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-11-09 08:30:42,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-09 08:30:42,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:42,387 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:42,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:42,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:42,603 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:42,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:42,603 INFO L85 PathProgramCache]: Analyzing trace with hash 490766607, now seen corresponding path program 5 times [2021-11-09 08:30:42,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:42,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442743538] [2021-11-09 08:30:42,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:42,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:42,686 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:30:42,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:42,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442743538] [2021-11-09 08:30:42,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442743538] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:42,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073029870] [2021-11-09 08:30:42,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:30:42,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:42,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:42,701 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:42,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 08:30:43,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 08:30:43,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:43,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:30:43,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-09 08:30:43,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073029870] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:43,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:43,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-11-09 08:30:43,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497378017] [2021-11-09 08:30:43,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:30:43,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:43,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:30:43,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:30:43,426 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 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) [2021-11-09 08:30:43,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:43,530 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2021-11-09 08:30:43,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:30:43,531 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 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 39 [2021-11-09 08:30:43,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:43,535 INFO L225 Difference]: With dead ends: 88 [2021-11-09 08:30:43,535 INFO L226 Difference]: Without dead ends: 57 [2021-11-09 08:30:43,536 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:30:43,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-09 08:30:43,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2021-11-09 08:30:43,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 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) [2021-11-09 08:30:43,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2021-11-09 08:30:43,554 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 39 [2021-11-09 08:30:43,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:43,554 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2021-11-09 08:30:43,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 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) [2021-11-09 08:30:43,554 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2021-11-09 08:30:43,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 08:30:43,555 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:43,556 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:43,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:43,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-09 08:30:43,771 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:43,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:43,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1480545093, now seen corresponding path program 6 times [2021-11-09 08:30:43,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:43,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027203631] [2021-11-09 08:30:43,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:43,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:43,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:43,875 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-09 08:30:43,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:43,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027203631] [2021-11-09 08:30:43,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027203631] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:43,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2776165] [2021-11-09 08:30:43,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:30:43,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:43,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:43,878 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:43,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 08:30:44,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-09 08:30:44,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:44,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:30:44,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:44,439 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-09 08:30:44,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2776165] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:44,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:44,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-11-09 08:30:44,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786942117] [2021-11-09 08:30:44,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:30:44,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:44,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:30:44,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:30:44,442 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-11-09 08:30:44,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:44,584 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2021-11-09 08:30:44,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 08:30:44,585 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 49 [2021-11-09 08:30:44,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:44,589 INFO L225 Difference]: With dead ends: 106 [2021-11-09 08:30:44,589 INFO L226 Difference]: Without dead ends: 67 [2021-11-09 08:30:44,590 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:30:44,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-09 08:30:44,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2021-11-09 08:30:44,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.098360655737705) internal successors, (67), 61 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) [2021-11-09 08:30:44,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2021-11-09 08:30:44,608 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 49 [2021-11-09 08:30:44,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:44,608 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2021-11-09 08:30:44,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-11-09 08:30:44,608 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2021-11-09 08:30:44,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-09 08:30:44,610 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:44,610 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:44,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:44,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-09 08:30:44,827 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:44,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:44,828 INFO L85 PathProgramCache]: Analyzing trace with hash -352839173, now seen corresponding path program 7 times [2021-11-09 08:30:44,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:44,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88817463] [2021-11-09 08:30:44,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:44,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:44,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:44,942 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-09 08:30:44,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:44,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88817463] [2021-11-09 08:30:44,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88817463] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:44,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126360283] [2021-11-09 08:30:44,946 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:30:44,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:44,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:44,951 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:44,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 08:30:45,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:45,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 08:30:45,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:45,323 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-09 08:30:45,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126360283] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:45,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:45,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-09 08:30:45,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889993174] [2021-11-09 08:30:45,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:30:45,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:45,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:30:45,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:30:45,330 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:45,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:45,375 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2021-11-09 08:30:45,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 08:30:45,377 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-09 08:30:45,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:45,378 INFO L225 Difference]: With dead ends: 112 [2021-11-09 08:30:45,378 INFO L226 Difference]: Without dead ends: 65 [2021-11-09 08:30:45,383 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:30:45,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-09 08:30:45,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-11-09 08:30:45,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 63 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) [2021-11-09 08:30:45,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2021-11-09 08:30:45,399 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 59 [2021-11-09 08:30:45,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:45,399 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2021-11-09 08:30:45,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:45,399 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2021-11-09 08:30:45,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 08:30:45,400 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:45,401 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:45,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:45,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:45,605 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:45,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:45,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1382597703, now seen corresponding path program 8 times [2021-11-09 08:30:45,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:45,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748377825] [2021-11-09 08:30:45,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:45,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:45,789 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-09 08:30:45,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:45,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748377825] [2021-11-09 08:30:45,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748377825] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:45,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259138142] [2021-11-09 08:30:45,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:30:45,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:45,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:45,795 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:45,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 08:30:45,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:30:45,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:45,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 08:30:45,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:46,135 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-09 08:30:46,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259138142] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:46,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:46,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-09 08:30:46,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767184899] [2021-11-09 08:30:46,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:30:46,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:46,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:30:46,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:30:46,138 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:46,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:46,178 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2021-11-09 08:30:46,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:30:46,179 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-09 08:30:46,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:46,180 INFO L225 Difference]: With dead ends: 114 [2021-11-09 08:30:46,180 INFO L226 Difference]: Without dead ends: 67 [2021-11-09 08:30:46,180 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:30:46,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-09 08:30:46,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2021-11-09 08:30:46,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 65 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) [2021-11-09 08:30:46,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2021-11-09 08:30:46,186 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 61 [2021-11-09 08:30:46,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:46,186 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2021-11-09 08:30:46,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:46,186 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2021-11-09 08:30:46,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 08:30:46,188 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:46,188 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:46,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:46,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 08:30:46,411 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:46,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:46,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1156900343, now seen corresponding path program 9 times [2021-11-09 08:30:46,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:46,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123803592] [2021-11-09 08:30:46,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:46,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:46,578 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-09 08:30:46,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:46,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123803592] [2021-11-09 08:30:46,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123803592] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:46,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525068258] [2021-11-09 08:30:46,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:30:46,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:46,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:46,580 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:46,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 08:30:46,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 08:30:46,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:46,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:30:46,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:47,203 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-09 08:30:47,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525068258] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:47,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:47,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2021-11-09 08:30:47,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513212731] [2021-11-09 08:30:47,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 08:30:47,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:47,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 08:30:47,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:30:47,205 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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) [2021-11-09 08:30:47,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:47,368 INFO L93 Difference]: Finished difference Result 128 states and 142 transitions. [2021-11-09 08:30:47,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 08:30:47,369 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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 63 [2021-11-09 08:30:47,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:47,370 INFO L225 Difference]: With dead ends: 128 [2021-11-09 08:30:47,370 INFO L226 Difference]: Without dead ends: 81 [2021-11-09 08:30:47,374 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:30:47,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-09 08:30:47,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2021-11-09 08:30:47,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.08) internal successors, (81), 75 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) [2021-11-09 08:30:47,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2021-11-09 08:30:47,382 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 63 [2021-11-09 08:30:47,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:47,383 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2021-11-09 08:30:47,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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) [2021-11-09 08:30:47,383 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2021-11-09 08:30:47,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-09 08:30:47,391 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:47,391 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:47,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:47,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:47,609 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:47,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:47,610 INFO L85 PathProgramCache]: Analyzing trace with hash 2005284397, now seen corresponding path program 10 times [2021-11-09 08:30:47,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:47,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983019935] [2021-11-09 08:30:47,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:47,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-09 08:30:47,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:47,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983019935] [2021-11-09 08:30:47,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983019935] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:47,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591984845] [2021-11-09 08:30:47,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:30:47,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:47,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:47,746 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:47,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 08:30:47,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:30:47,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:47,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:30:47,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-11-09 08:30:48,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591984845] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:48,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:48,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-11-09 08:30:48,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422760571] [2021-11-09 08:30:48,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 08:30:48,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:48,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 08:30:48,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:30:48,131 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 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) [2021-11-09 08:30:48,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:48,263 INFO L93 Difference]: Finished difference Result 146 states and 160 transitions. [2021-11-09 08:30:48,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 08:30:48,264 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 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 73 [2021-11-09 08:30:48,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:48,267 INFO L225 Difference]: With dead ends: 146 [2021-11-09 08:30:48,267 INFO L226 Difference]: Without dead ends: 91 [2021-11-09 08:30:48,269 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:30:48,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-09 08:30:48,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2021-11-09 08:30:48,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0705882352941176) internal successors, (91), 85 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) [2021-11-09 08:30:48,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2021-11-09 08:30:48,275 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 73 [2021-11-09 08:30:48,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:48,275 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2021-11-09 08:30:48,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 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) [2021-11-09 08:30:48,275 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2021-11-09 08:30:48,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-09 08:30:48,276 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:48,277 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:48,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:48,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:48,491 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:48,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:48,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1859910371, now seen corresponding path program 11 times [2021-11-09 08:30:48,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:48,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832534062] [2021-11-09 08:30:48,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:48,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:48,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-09 08:30:48,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:48,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832534062] [2021-11-09 08:30:48,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832534062] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:48,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529480147] [2021-11-09 08:30:48,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:30:48,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:48,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:48,665 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:48,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0bd6a2-12b0-40c0-8738-aa6ff1ed37a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process