./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test24-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test24-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 45294379b83c6b60e0b0199955cdf7244f057430 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-19 23:11:19,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 23:11:19,187 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 23:11:19,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 23:11:19,202 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 23:11:19,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 23:11:19,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 23:11:19,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 23:11:19,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 23:11:19,219 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 23:11:19,220 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 23:11:19,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 23:11:19,223 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 23:11:19,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 23:11:19,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 23:11:19,228 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 23:11:19,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 23:11:19,233 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 23:11:19,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 23:11:19,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 23:11:19,243 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 23:11:19,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 23:11:19,248 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 23:11:19,249 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 23:11:19,251 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 23:11:19,252 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 23:11:19,252 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 23:11:19,254 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 23:11:19,255 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 23:11:19,255 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 23:11:19,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 23:11:19,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 23:11:19,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 23:11:19,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 23:11:19,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 23:11:19,259 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 23:11:19,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 23:11:19,260 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 23:11:19,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 23:11:19,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 23:11:19,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 23:11:19,263 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-19 23:11:19,287 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 23:11:19,297 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 23:11:19,298 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 23:11:19,298 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 23:11:19,298 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 23:11:19,299 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 23:11:19,299 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 23:11:19,299 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 23:11:19,299 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 23:11:19,300 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 23:11:19,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-19 23:11:19,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 23:11:19,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-19 23:11:19,300 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 23:11:19,301 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 23:11:19,302 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 23:11:19,302 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-19 23:11:19,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 23:11:19,302 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 23:11:19,303 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 23:11:19,303 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 23:11:19,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 23:11:19,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 23:11:19,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 23:11:19,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-19 23:11:19,304 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-19 23:11:19,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-19 23:11:19,304 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-19 23:11:19,305 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer 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(__VERIFIER_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 -> 45294379b83c6b60e0b0199955cdf7244f057430 [2019-11-19 23:11:19,451 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 23:11:19,460 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 23:11:19,464 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 23:11:19,465 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 23:11:19,465 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 23:11:19,466 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/../../sv-benchmarks/c/ldv-regression/test24-2.c [2019-11-19 23:11:19,526 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/data/510e99407/e8bac18a77ee4be9b0022d3bbc9e77dc/FLAGe0863e565 [2019-11-19 23:11:19,884 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 23:11:19,885 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/sv-benchmarks/c/ldv-regression/test24-2.c [2019-11-19 23:11:19,890 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/data/510e99407/e8bac18a77ee4be9b0022d3bbc9e77dc/FLAGe0863e565 [2019-11-19 23:11:20,363 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/data/510e99407/e8bac18a77ee4be9b0022d3bbc9e77dc [2019-11-19 23:11:20,366 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 23:11:20,367 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 23:11:20,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 23:11:20,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 23:11:20,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 23:11:20,373 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 11:11:20" (1/1) ... [2019-11-19 23:11:20,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71fc9424 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:11:20, skipping insertion in model container [2019-11-19 23:11:20,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 11:11:20" (1/1) ... [2019-11-19 23:11:20,382 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 23:11:20,397 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 23:11:20,668 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 23:11:20,675 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 23:11:20,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 23:11:20,718 INFO L192 MainTranslator]: Completed translation [2019-11-19 23:11:20,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:11:20 WrapperNode [2019-11-19 23:11:20,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 23:11:20,720 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 23:11:20,720 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 23:11:20,720 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 23:11:20,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:11:20" (1/1) ... [2019-11-19 23:11:20,739 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:11:20" (1/1) ... [2019-11-19 23:11:20,766 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 23:11:20,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 23:11:20,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 23:11:20,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 23:11:20,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:11:20" (1/1) ... [2019-11-19 23:11:20,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:11:20" (1/1) ... [2019-11-19 23:11:20,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:11:20" (1/1) ... [2019-11-19 23:11:20,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:11:20" (1/1) ... [2019-11-19 23:11:20,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:11:20" (1/1) ... [2019-11-19 23:11:20,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:11:20" (1/1) ... [2019-11-19 23:11:20,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:11:20" (1/1) ... [2019-11-19 23:11:20,818 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 23:11:20,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 23:11:20,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 23:11:20,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 23:11:20,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:11:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 23:11:20,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-19 23:11:20,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 23:11:20,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 23:11:20,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-19 23:11:20,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-19 23:11:20,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-19 23:11:21,122 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 23:11:21,122 INFO L285 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-19 23:11:21,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 11:11:21 BoogieIcfgContainer [2019-11-19 23:11:21,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 23:11:21,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 23:11:21,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 23:11:21,127 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 23:11:21,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 11:11:20" (1/3) ... [2019-11-19 23:11:21,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73b80010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 11:11:21, skipping insertion in model container [2019-11-19 23:11:21,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:11:20" (2/3) ... [2019-11-19 23:11:21,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73b80010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 11:11:21, skipping insertion in model container [2019-11-19 23:11:21,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 11:11:21" (3/3) ... [2019-11-19 23:11:21,130 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2019-11-19 23:11:21,139 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 23:11:21,144 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-19 23:11:21,154 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-19 23:11:21,175 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 23:11:21,175 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-19 23:11:21,175 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 23:11:21,175 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 23:11:21,176 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 23:11:21,176 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 23:11:21,176 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 23:11:21,176 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 23:11:21,188 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-19 23:11:21,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-19 23:11:21,194 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:11:21,194 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:11:21,195 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:11:21,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:11:21,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1829445793, now seen corresponding path program 1 times [2019-11-19 23:11:21,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:11:21,207 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190425269] [2019-11-19 23:11:21,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:11:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:11:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:21,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190425269] [2019-11-19 23:11:21,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:11:21,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-19 23:11:21,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569774486] [2019-11-19 23:11:21,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-19 23:11:21,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:11:21,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-19 23:11:21,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-19 23:11:21,361 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-11-19 23:11:21,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:11:21,374 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2019-11-19 23:11:21,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-19 23:11:21,375 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-19 23:11:21,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:11:21,383 INFO L225 Difference]: With dead ends: 30 [2019-11-19 23:11:21,383 INFO L226 Difference]: Without dead ends: 13 [2019-11-19 23:11:21,386 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-19 23:11:21,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-19 23:11:21,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-19 23:11:21,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-19 23:11:21,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-19 23:11:21,413 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-11-19 23:11:21,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:11:21,414 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-19 23:11:21,414 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-19 23:11:21,414 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-19 23:11:21,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-19 23:11:21,415 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:11:21,415 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:11:21,415 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:11:21,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:11:21,416 INFO L82 PathProgramCache]: Analyzing trace with hash 672236885, now seen corresponding path program 1 times [2019-11-19 23:11:21,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:11:21,416 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117680701] [2019-11-19 23:11:21,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:11:21,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:11:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:21,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117680701] [2019-11-19 23:11:21,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:11:21,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-19 23:11:21,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988327013] [2019-11-19 23:11:21,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-19 23:11:21,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:11:21,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 23:11:21,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 23:11:21,458 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2019-11-19 23:11:21,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:11:21,486 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2019-11-19 23:11:21,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 23:11:21,486 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-19 23:11:21,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:11:21,487 INFO L225 Difference]: With dead ends: 24 [2019-11-19 23:11:21,487 INFO L226 Difference]: Without dead ends: 15 [2019-11-19 23:11:21,488 INFO L630 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 [2019-11-19 23:11:21,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-19 23:11:21,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-19 23:11:21,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-19 23:11:21,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-19 23:11:21,491 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2019-11-19 23:11:21,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:11:21,491 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-19 23:11:21,491 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-19 23:11:21,492 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-19 23:11:21,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-19 23:11:21,492 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:11:21,492 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:11:21,492 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:11:21,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:11:21,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1835948819, now seen corresponding path program 1 times [2019-11-19 23:11:21,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:11:21,493 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559786030] [2019-11-19 23:11:21,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:11:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:11:21,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:21,610 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559786030] [2019-11-19 23:11:21,610 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343576536] [2019-11-19 23:11:21,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:21,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:11:21,675 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 23:11:21,680 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:11:21,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:21,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:11:21,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-19 23:11:21,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737641814] [2019-11-19 23:11:21,709 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 23:11:21,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:11:21,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 23:11:21,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-19 23:11:21,709 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2019-11-19 23:11:21,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:11:21,743 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2019-11-19 23:11:21,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 23:11:21,745 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-11-19 23:11:21,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:11:21,745 INFO L225 Difference]: With dead ends: 26 [2019-11-19 23:11:21,745 INFO L226 Difference]: Without dead ends: 17 [2019-11-19 23:11:21,746 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-19 23:11:21,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-19 23:11:21,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-11-19 23:11:21,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-19 23:11:21,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-11-19 23:11:21,749 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2019-11-19 23:11:21,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:11:21,750 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-11-19 23:11:21,750 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 23:11:21,750 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-11-19 23:11:21,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-19 23:11:21,751 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:11:21,751 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:11:21,951 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:21,952 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:11:21,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:11:21,952 INFO L82 PathProgramCache]: Analyzing trace with hash -823346863, now seen corresponding path program 2 times [2019-11-19 23:11:21,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:11:21,952 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825108819] [2019-11-19 23:11:21,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:11:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:11:22,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:22,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825108819] [2019-11-19 23:11:22,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227960004] [2019-11-19 23:11:22,022 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:22,085 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 23:11:22,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:11:22,087 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 23:11:22,090 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:11:22,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:22,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:11:22,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-19 23:11:22,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071393322] [2019-11-19 23:11:22,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 23:11:22,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:11:22,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 23:11:22,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-19 23:11:22,115 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2019-11-19 23:11:22,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:11:22,147 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2019-11-19 23:11:22,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 23:11:22,148 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-19 23:11:22,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:11:22,149 INFO L225 Difference]: With dead ends: 28 [2019-11-19 23:11:22,149 INFO L226 Difference]: Without dead ends: 19 [2019-11-19 23:11:22,150 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-19 23:11:22,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-19 23:11:22,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-11-19 23:11:22,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-19 23:11:22,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-11-19 23:11:22,157 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2019-11-19 23:11:22,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:11:22,158 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-11-19 23:11:22,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 23:11:22,158 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-11-19 23:11:22,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-19 23:11:22,160 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:11:22,160 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:11:22,364 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:22,364 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:11:22,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:11:22,365 INFO L82 PathProgramCache]: Analyzing trace with hash -900956145, now seen corresponding path program 3 times [2019-11-19 23:11:22,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:11:22,365 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76559743] [2019-11-19 23:11:22,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:11:22,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:11:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:22,430 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76559743] [2019-11-19 23:11:22,430 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410233594] [2019-11-19 23:11:22,430 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:22,493 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-19 23:11:22,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:11:22,494 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 23:11:22,495 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:11:22,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:22,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:11:22,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-19 23:11:22,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527944434] [2019-11-19 23:11:22,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-19 23:11:22,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:11:22,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-19 23:11:22,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-19 23:11:22,515 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2019-11-19 23:11:22,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:11:22,553 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-11-19 23:11:22,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 23:11:22,554 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-11-19 23:11:22,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:11:22,554 INFO L225 Difference]: With dead ends: 30 [2019-11-19 23:11:22,554 INFO L226 Difference]: Without dead ends: 21 [2019-11-19 23:11:22,555 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-19 23:11:22,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-19 23:11:22,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-11-19 23:11:22,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-19 23:11:22,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-19 23:11:22,559 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2019-11-19 23:11:22,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:11:22,559 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-19 23:11:22,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-19 23:11:22,559 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-19 23:11:22,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-19 23:11:22,560 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:11:22,560 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:11:22,768 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:22,769 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:11:22,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:11:22,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1825935181, now seen corresponding path program 4 times [2019-11-19 23:11:22,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:11:22,770 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188071753] [2019-11-19 23:11:22,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:11:22,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:11:22,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:22,853 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188071753] [2019-11-19 23:11:22,853 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034802065] [2019-11-19 23:11:22,853 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:22,900 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 23:11:22,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:11:22,901 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 23:11:22,903 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:11:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:22,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:11:22,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-19 23:11:22,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758595313] [2019-11-19 23:11:22,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-19 23:11:22,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:11:22,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-19 23:11:22,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-19 23:11:22,916 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2019-11-19 23:11:22,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:11:22,953 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2019-11-19 23:11:22,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 23:11:22,954 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2019-11-19 23:11:22,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:11:22,954 INFO L225 Difference]: With dead ends: 32 [2019-11-19 23:11:22,954 INFO L226 Difference]: Without dead ends: 23 [2019-11-19 23:11:22,955 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-19 23:11:22,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-19 23:11:22,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-11-19 23:11:22,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-19 23:11:22,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-11-19 23:11:22,958 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2019-11-19 23:11:22,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:11:22,959 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-11-19 23:11:22,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-19 23:11:22,959 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-11-19 23:11:22,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-19 23:11:22,960 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:11:22,960 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:11:23,160 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:23,161 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:11:23,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:11:23,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1856518389, now seen corresponding path program 5 times [2019-11-19 23:11:23,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:11:23,162 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136942311] [2019-11-19 23:11:23,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:11:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:11:23,255 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:23,256 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136942311] [2019-11-19 23:11:23,256 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133108044] [2019-11-19 23:11:23,256 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:23,327 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-19 23:11:23,328 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:11:23,329 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 23:11:23,330 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:11:23,346 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:23,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:11:23,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-19 23:11:23,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909771550] [2019-11-19 23:11:23,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-19 23:11:23,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:11:23,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-19 23:11:23,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-19 23:11:23,354 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2019-11-19 23:11:23,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:11:23,395 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-11-19 23:11:23,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-19 23:11:23,397 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2019-11-19 23:11:23,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:11:23,398 INFO L225 Difference]: With dead ends: 34 [2019-11-19 23:11:23,398 INFO L226 Difference]: Without dead ends: 25 [2019-11-19 23:11:23,398 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-19 23:11:23,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-19 23:11:23,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-19 23:11:23,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-19 23:11:23,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-11-19 23:11:23,402 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2019-11-19 23:11:23,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:11:23,402 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-11-19 23:11:23,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-19 23:11:23,402 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-11-19 23:11:23,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-19 23:11:23,403 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:11:23,406 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:11:23,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:23,614 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:11:23,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:11:23,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1641347255, now seen corresponding path program 6 times [2019-11-19 23:11:23,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:11:23,615 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892272867] [2019-11-19 23:11:23,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:11:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:11:23,703 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:23,704 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892272867] [2019-11-19 23:11:23,704 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304828764] [2019-11-19 23:11:23,704 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:23,818 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-19 23:11:23,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:11:23,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-19 23:11:23,821 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:11:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:23,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:11:23,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-19 23:11:23,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298697029] [2019-11-19 23:11:23,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-19 23:11:23,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:11:23,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-19 23:11:23,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-19 23:11:23,840 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2019-11-19 23:11:23,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:11:23,891 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-11-19 23:11:23,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-19 23:11:23,892 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-19 23:11:23,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:11:23,893 INFO L225 Difference]: With dead ends: 36 [2019-11-19 23:11:23,893 INFO L226 Difference]: Without dead ends: 27 [2019-11-19 23:11:23,893 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-19 23:11:23,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-19 23:11:23,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-11-19 23:11:23,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-19 23:11:23,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-19 23:11:23,898 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2019-11-19 23:11:23,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:11:23,898 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-19 23:11:23,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-19 23:11:23,898 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-19 23:11:23,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-19 23:11:23,899 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:11:23,899 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:11:24,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:24,103 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:11:24,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:11:24,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1020317689, now seen corresponding path program 7 times [2019-11-19 23:11:24,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:11:24,104 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374327342] [2019-11-19 23:11:24,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:11:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:11:24,233 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:24,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374327342] [2019-11-19 23:11:24,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440941770] [2019-11-19 23:11:24,234 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:11:24,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-19 23:11:24,293 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:11:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:24,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:11:24,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-19 23:11:24,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025053662] [2019-11-19 23:11:24,317 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-19 23:11:24,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:11:24,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-19 23:11:24,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-19 23:11:24,319 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2019-11-19 23:11:24,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:11:24,368 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2019-11-19 23:11:24,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-19 23:11:24,369 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2019-11-19 23:11:24,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:11:24,370 INFO L225 Difference]: With dead ends: 38 [2019-11-19 23:11:24,370 INFO L226 Difference]: Without dead ends: 29 [2019-11-19 23:11:24,371 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-19 23:11:24,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-19 23:11:24,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-19 23:11:24,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-19 23:11:24,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2019-11-19 23:11:24,375 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2019-11-19 23:11:24,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:11:24,375 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2019-11-19 23:11:24,375 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-19 23:11:24,375 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2019-11-19 23:11:24,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-19 23:11:24,380 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:11:24,380 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:11:24,583 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:24,584 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:11:24,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:11:24,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1211358907, now seen corresponding path program 8 times [2019-11-19 23:11:24,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:11:24,584 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077102134] [2019-11-19 23:11:24,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:11:24,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:11:24,706 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:24,706 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077102134] [2019-11-19 23:11:24,706 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293426987] [2019-11-19 23:11:24,706 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:24,765 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 23:11:24,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:11:24,766 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-19 23:11:24,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:11:24,786 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:24,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:11:24,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-19 23:11:24,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451205244] [2019-11-19 23:11:24,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-19 23:11:24,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:11:24,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-19 23:11:24,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-19 23:11:24,789 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 12 states. [2019-11-19 23:11:24,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:11:24,839 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2019-11-19 23:11:24,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-19 23:11:24,840 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-11-19 23:11:24,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:11:24,841 INFO L225 Difference]: With dead ends: 40 [2019-11-19 23:11:24,841 INFO L226 Difference]: Without dead ends: 31 [2019-11-19 23:11:24,841 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-19 23:11:24,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-19 23:11:24,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-19 23:11:24,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-19 23:11:24,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-11-19 23:11:24,845 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2019-11-19 23:11:24,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:11:24,846 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-11-19 23:11:24,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-19 23:11:24,846 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-11-19 23:11:24,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-19 23:11:24,847 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:11:24,847 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:11:25,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:25,051 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:11:25,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:11:25,051 INFO L82 PathProgramCache]: Analyzing trace with hash -118375677, now seen corresponding path program 9 times [2019-11-19 23:11:25,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:11:25,052 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845740069] [2019-11-19 23:11:25,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:11:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:11:25,195 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:25,196 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845740069] [2019-11-19 23:11:25,196 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922948394] [2019-11-19 23:11:25,196 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:25,506 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-19 23:11:25,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:11:25,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-19 23:11:25,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:11:25,528 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:25,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:11:25,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-19 23:11:25,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284753253] [2019-11-19 23:11:25,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-19 23:11:25,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:11:25,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-19 23:11:25,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-19 23:11:25,530 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 13 states. [2019-11-19 23:11:25,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:11:25,594 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2019-11-19 23:11:25,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-19 23:11:25,597 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2019-11-19 23:11:25,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:11:25,597 INFO L225 Difference]: With dead ends: 42 [2019-11-19 23:11:25,598 INFO L226 Difference]: Without dead ends: 33 [2019-11-19 23:11:25,598 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-19 23:11:25,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-19 23:11:25,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-11-19 23:11:25,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-19 23:11:25,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-19 23:11:25,602 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2019-11-19 23:11:25,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:11:25,603 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-19 23:11:25,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-19 23:11:25,603 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-19 23:11:25,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-19 23:11:25,604 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:11:25,604 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:11:25,804 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:25,805 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:11:25,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:11:25,805 INFO L82 PathProgramCache]: Analyzing trace with hash -2028479167, now seen corresponding path program 10 times [2019-11-19 23:11:25,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:11:25,805 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876155910] [2019-11-19 23:11:25,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:11:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:11:25,982 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:25,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876155910] [2019-11-19 23:11:25,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449904440] [2019-11-19 23:11:25,983 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:26,036 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 23:11:26,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:11:26,037 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-19 23:11:26,039 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:11:26,051 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:26,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:11:26,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-19 23:11:26,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076355860] [2019-11-19 23:11:26,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-19 23:11:26,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:11:26,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-19 23:11:26,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-19 23:11:26,053 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 14 states. [2019-11-19 23:11:26,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:11:26,108 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2019-11-19 23:11:26,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-19 23:11:26,109 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2019-11-19 23:11:26,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:11:26,109 INFO L225 Difference]: With dead ends: 44 [2019-11-19 23:11:26,109 INFO L226 Difference]: Without dead ends: 35 [2019-11-19 23:11:26,110 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-19 23:11:26,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-19 23:11:26,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-11-19 23:11:26,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-19 23:11:26,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2019-11-19 23:11:26,113 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2019-11-19 23:11:26,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:11:26,114 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2019-11-19 23:11:26,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-19 23:11:26,114 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2019-11-19 23:11:26,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-19 23:11:26,115 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:11:26,115 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:11:26,315 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:26,316 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:11:26,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:11:26,316 INFO L82 PathProgramCache]: Analyzing trace with hash 608069631, now seen corresponding path program 11 times [2019-11-19 23:11:26,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:11:26,316 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766403623] [2019-11-19 23:11:26,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:11:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:11:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:26,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766403623] [2019-11-19 23:11:26,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559416196] [2019-11-19 23:11:26,472 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:26,739 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-19 23:11:26,739 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:11:26,741 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-19 23:11:26,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:11:26,759 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:26,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:11:26,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-19 23:11:26,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628113573] [2019-11-19 23:11:26,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-19 23:11:26,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:11:26,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-19 23:11:26,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-19 23:11:26,761 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 15 states. [2019-11-19 23:11:26,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:11:26,823 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2019-11-19 23:11:26,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-19 23:11:26,824 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2019-11-19 23:11:26,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:11:26,825 INFO L225 Difference]: With dead ends: 46 [2019-11-19 23:11:26,825 INFO L226 Difference]: Without dead ends: 37 [2019-11-19 23:11:26,825 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-19 23:11:26,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-19 23:11:26,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-11-19 23:11:26,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-19 23:11:26,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2019-11-19 23:11:26,828 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2019-11-19 23:11:26,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:11:26,829 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2019-11-19 23:11:26,829 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-19 23:11:26,829 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2019-11-19 23:11:26,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-19 23:11:26,830 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:11:26,830 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:11:27,030 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:27,030 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:11:27,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:11:27,031 INFO L82 PathProgramCache]: Analyzing trace with hash 300759869, now seen corresponding path program 12 times [2019-11-19 23:11:27,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:11:27,031 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238325488] [2019-11-19 23:11:27,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:11:27,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:11:27,229 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:27,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238325488] [2019-11-19 23:11:27,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970091179] [2019-11-19 23:11:27,230 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:28,126 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-19 23:11:28,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:11:28,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-19 23:11:28,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:11:28,150 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:28,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:11:28,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-19 23:11:28,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591994902] [2019-11-19 23:11:28,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-19 23:11:28,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:11:28,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-19 23:11:28,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-19 23:11:28,152 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 16 states. [2019-11-19 23:11:28,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:11:28,200 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2019-11-19 23:11:28,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-19 23:11:28,201 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2019-11-19 23:11:28,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:11:28,202 INFO L225 Difference]: With dead ends: 48 [2019-11-19 23:11:28,202 INFO L226 Difference]: Without dead ends: 39 [2019-11-19 23:11:28,202 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-19 23:11:28,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-19 23:11:28,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-11-19 23:11:28,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-19 23:11:28,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-19 23:11:28,206 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2019-11-19 23:11:28,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:11:28,206 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-19 23:11:28,206 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-19 23:11:28,206 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-19 23:11:28,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-19 23:11:28,207 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:11:28,207 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:11:28,407 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:28,408 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:11:28,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:11:28,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1328822011, now seen corresponding path program 13 times [2019-11-19 23:11:28,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:11:28,409 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124981105] [2019-11-19 23:11:28,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:11:28,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:11:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:28,602 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124981105] [2019-11-19 23:11:28,602 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693555035] [2019-11-19 23:11:28,603 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:28,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:11:28,663 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-19 23:11:28,665 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:11:28,677 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:28,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:11:28,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-19 23:11:28,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139201758] [2019-11-19 23:11:28,678 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-19 23:11:28,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:11:28,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-19 23:11:28,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-19 23:11:28,679 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 17 states. [2019-11-19 23:11:28,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:11:28,720 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2019-11-19 23:11:28,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-19 23:11:28,720 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2019-11-19 23:11:28,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:11:28,721 INFO L225 Difference]: With dead ends: 50 [2019-11-19 23:11:28,721 INFO L226 Difference]: Without dead ends: 41 [2019-11-19 23:11:28,721 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-19 23:11:28,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-19 23:11:28,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-11-19 23:11:28,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-19 23:11:28,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2019-11-19 23:11:28,727 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2019-11-19 23:11:28,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:11:28,728 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2019-11-19 23:11:28,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-19 23:11:28,728 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2019-11-19 23:11:28,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-19 23:11:28,729 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:11:28,730 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:11:28,933 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:28,933 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:11:28,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:11:28,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1454062393, now seen corresponding path program 14 times [2019-11-19 23:11:28,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:11:28,934 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183377745] [2019-11-19 23:11:28,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:11:28,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:11:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:29,126 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183377745] [2019-11-19 23:11:29,126 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085883763] [2019-11-19 23:11:29,127 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:29,205 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 23:11:29,205 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:11:29,207 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-19 23:11:29,209 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:11:29,222 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:29,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:11:29,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-19 23:11:29,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152483343] [2019-11-19 23:11:29,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-19 23:11:29,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:11:29,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-19 23:11:29,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-19 23:11:29,228 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 18 states. [2019-11-19 23:11:29,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:11:29,302 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2019-11-19 23:11:29,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-19 23:11:29,303 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2019-11-19 23:11:29,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:11:29,304 INFO L225 Difference]: With dead ends: 52 [2019-11-19 23:11:29,304 INFO L226 Difference]: Without dead ends: 43 [2019-11-19 23:11:29,304 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-19 23:11:29,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-19 23:11:29,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-11-19 23:11:29,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-19 23:11:29,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-11-19 23:11:29,308 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2019-11-19 23:11:29,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:11:29,309 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-11-19 23:11:29,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-19 23:11:29,309 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-11-19 23:11:29,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-19 23:11:29,310 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:11:29,310 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:11:29,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:29,510 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:11:29,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:11:29,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1550985207, now seen corresponding path program 15 times [2019-11-19 23:11:29,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:11:29,511 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985047849] [2019-11-19 23:11:29,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:11:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:11:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:29,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985047849] [2019-11-19 23:11:29,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76676801] [2019-11-19 23:11:29,730 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:30,991 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-19 23:11:30,992 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:11:30,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-19 23:11:30,999 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:11:31,018 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:31,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:11:31,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-19 23:11:31,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482645928] [2019-11-19 23:11:31,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-19 23:11:31,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:11:31,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-19 23:11:31,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-19 23:11:31,028 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 19 states. [2019-11-19 23:11:31,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:11:31,078 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2019-11-19 23:11:31,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-19 23:11:31,078 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2019-11-19 23:11:31,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:11:31,079 INFO L225 Difference]: With dead ends: 54 [2019-11-19 23:11:31,079 INFO L226 Difference]: Without dead ends: 45 [2019-11-19 23:11:31,080 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-19 23:11:31,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-19 23:11:31,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-11-19 23:11:31,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-19 23:11:31,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-11-19 23:11:31,084 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2019-11-19 23:11:31,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:11:31,084 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-11-19 23:11:31,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-19 23:11:31,084 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-11-19 23:11:31,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-19 23:11:31,085 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:11:31,085 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:11:31,286 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:31,286 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:11:31,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:11:31,286 INFO L82 PathProgramCache]: Analyzing trace with hash 204528949, now seen corresponding path program 16 times [2019-11-19 23:11:31,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:11:31,287 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341093370] [2019-11-19 23:11:31,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:11:31,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:11:31,534 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:31,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341093370] [2019-11-19 23:11:31,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916971035] [2019-11-19 23:11:31,535 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:31,614 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 23:11:31,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:11:31,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-19 23:11:31,622 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:11:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:31,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:11:31,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-19 23:11:31,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126646339] [2019-11-19 23:11:31,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-19 23:11:31,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:11:31,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-19 23:11:31,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-19 23:11:31,645 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 20 states. [2019-11-19 23:11:31,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:11:31,709 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2019-11-19 23:11:31,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-19 23:11:31,710 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2019-11-19 23:11:31,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:11:31,710 INFO L225 Difference]: With dead ends: 56 [2019-11-19 23:11:31,710 INFO L226 Difference]: Without dead ends: 47 [2019-11-19 23:11:31,711 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-19 23:11:31,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-19 23:11:31,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-11-19 23:11:31,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-19 23:11:31,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2019-11-19 23:11:31,716 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2019-11-19 23:11:31,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:11:31,717 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2019-11-19 23:11:31,717 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-19 23:11:31,717 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2019-11-19 23:11:31,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-19 23:11:31,719 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:11:31,719 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:11:31,922 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:31,922 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:11:31,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:11:31,923 INFO L82 PathProgramCache]: Analyzing trace with hash -954778893, now seen corresponding path program 17 times [2019-11-19 23:11:31,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:11:31,923 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238975026] [2019-11-19 23:11:31,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:11:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:11:32,146 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:32,147 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238975026] [2019-11-19 23:11:32,147 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458606694] [2019-11-19 23:11:32,147 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:33,143 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-19 23:11:33,143 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:11:33,147 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-19 23:11:33,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:11:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:33,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:11:33,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-19 23:11:33,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362033198] [2019-11-19 23:11:33,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-19 23:11:33,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:11:33,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-19 23:11:33,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-19 23:11:33,167 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 21 states. [2019-11-19 23:11:33,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:11:33,241 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2019-11-19 23:11:33,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-19 23:11:33,241 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 45 [2019-11-19 23:11:33,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:11:33,242 INFO L225 Difference]: With dead ends: 58 [2019-11-19 23:11:33,242 INFO L226 Difference]: Without dead ends: 49 [2019-11-19 23:11:33,242 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-19 23:11:33,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-19 23:11:33,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-11-19 23:11:33,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-19 23:11:33,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2019-11-19 23:11:33,245 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2019-11-19 23:11:33,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:11:33,246 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2019-11-19 23:11:33,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-19 23:11:33,246 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2019-11-19 23:11:33,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-19 23:11:33,246 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:11:33,246 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:11:33,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:33,447 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:11:33,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:11:33,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1641881905, now seen corresponding path program 18 times [2019-11-19 23:11:33,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:11:33,447 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126356724] [2019-11-19 23:11:33,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:11:33,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:11:33,672 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:33,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126356724] [2019-11-19 23:11:33,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303117677] [2019-11-19 23:11:33,673 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:39,473 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-19 23:11:39,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:11:39,486 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-19 23:11:39,488 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:11:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:39,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:11:39,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-19 23:11:39,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152764769] [2019-11-19 23:11:39,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-19 23:11:39,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:11:39,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-19 23:11:39,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-19 23:11:39,523 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 22 states. [2019-11-19 23:11:39,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:11:39,601 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2019-11-19 23:11:39,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-19 23:11:39,604 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 47 [2019-11-19 23:11:39,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:11:39,604 INFO L225 Difference]: With dead ends: 60 [2019-11-19 23:11:39,604 INFO L226 Difference]: Without dead ends: 51 [2019-11-19 23:11:39,605 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-19 23:11:39,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-19 23:11:39,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-11-19 23:11:39,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-19 23:11:39,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-19 23:11:39,609 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2019-11-19 23:11:39,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:11:39,610 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-19 23:11:39,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-19 23:11:39,610 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-19 23:11:39,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-19 23:11:39,610 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:11:39,611 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:11:39,811 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:39,811 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:11:39,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:11:39,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1656909807, now seen corresponding path program 19 times [2019-11-19 23:11:39,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:11:39,812 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868574976] [2019-11-19 23:11:39,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:11:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:11:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:40,182 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868574976] [2019-11-19 23:11:40,182 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739553698] [2019-11-19 23:11:40,183 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:40,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:11:40,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-19 23:11:40,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:11:40,291 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:11:40,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:11:40,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-19 23:11:40,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48958099] [2019-11-19 23:11:40,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-19 23:11:40,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:11:40,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-19 23:11:40,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-19 23:11:40,294 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 23 states. [2019-11-19 23:11:40,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:11:40,383 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2019-11-19 23:11:40,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-19 23:11:40,383 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2019-11-19 23:11:40,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:11:40,384 INFO L225 Difference]: With dead ends: 61 [2019-11-19 23:11:40,384 INFO L226 Difference]: Without dead ends: 52 [2019-11-19 23:11:40,385 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-19 23:11:40,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-19 23:11:40,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-19 23:11:40,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-19 23:11:40,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2019-11-19 23:11:40,389 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2019-11-19 23:11:40,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:11:40,389 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2019-11-19 23:11:40,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-19 23:11:40,390 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2019-11-19 23:11:40,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-19 23:11:40,390 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:11:40,391 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:11:40,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:11:40,594 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:11:40,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:11:40,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1081145555, now seen corresponding path program 20 times [2019-11-19 23:11:40,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:11:40,595 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890757907] [2019-11-19 23:11:40,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:11:40,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 23:11:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 23:11:40,780 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 23:11:40,780 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-19 23:11:40,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 11:11:40 BoogieIcfgContainer [2019-11-19 23:11:40,851 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 23:11:40,851 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 23:11:40,851 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 23:11:40,852 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 23:11:40,852 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 11:11:21" (3/4) ... [2019-11-19 23:11:40,855 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-19 23:11:40,939 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d8608704-f747-4a2a-aba6-3b8b5f012a44/bin/uautomizer/witness.graphml [2019-11-19 23:11:40,940 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 23:11:40,942 INFO L168 Benchmark]: Toolchain (without parser) took 20574.43 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 269.0 MB). Free memory was 948.7 MB in the beginning and 965.3 MB in the end (delta: -16.6 MB). Peak memory consumption was 252.4 MB. Max. memory is 11.5 GB. [2019-11-19 23:11:40,942 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 23:11:40,943 INFO L168 Benchmark]: CACSL2BoogieTranslator took 350.34 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 948.7 MB in the beginning and 1.1 GB in the end (delta: -182.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2019-11-19 23:11:40,943 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.68 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 23:11:40,943 INFO L168 Benchmark]: Boogie Preprocessor took 50.68 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 23:11:40,944 INFO L168 Benchmark]: RCFGBuilder took 304.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.3 MB). Peak memory consumption was 21.3 MB. Max. memory is 11.5 GB. [2019-11-19 23:11:40,944 INFO L168 Benchmark]: TraceAbstraction took 19726.57 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 129.0 MB). Free memory was 1.1 GB in the beginning and 968.3 MB in the end (delta: 142.0 MB). Peak memory consumption was 271.0 MB. Max. memory is 11.5 GB. [2019-11-19 23:11:40,945 INFO L168 Benchmark]: Witness Printer took 88.42 ms. Allocated memory is still 1.3 GB. Free memory was 968.3 MB in the beginning and 965.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 11.5 GB. [2019-11-19 23:11:40,947 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 350.34 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 948.7 MB in the beginning and 1.1 GB in the end (delta: -182.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 47.68 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 50.68 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 304.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.3 MB). Peak memory consumption was 21.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 19726.57 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 129.0 MB). Free memory was 1.1 GB in the beginning and 968.3 MB in the end (delta: 142.0 MB). Peak memory consumption was 271.0 MB. Max. memory is 11.5 GB. * Witness Printer took 88.42 ms. Allocated memory is still 1.3 GB. Free memory was 968.3 MB in the beginning and 965.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] struct dummy ad1[20], *ad2; [L16] int i, j, *pa; [L17] j=0 [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND FALSE !(j<20) [L21] i = __VERIFIER_nondet_int() [L22] COND TRUE i >= 0 && i < 10 [L23] ad2 = ad1 [L24] ad1[i].a = i [L25] pa = &ad1[i].a [L26] EXPR ad2[i].a [L26] i = ad2[i].a + 10 [L27] EXPR \read(*pa) [L27] COND FALSE !(i < *pa) [L10] EXPR ad1[b].a [L10] return ad1[b].a == b; [L30] COND TRUE !check(ad1, i) [L37] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Result: UNSAFE, OverallTime: 19.6s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 259 SDtfs, 210 SDslu, 1430 SDs, 0 SdLazy, 618 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 822 GetRequests, 593 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 21 MinimizatonAttempts, 19 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 10.1s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 1250 NumberOfCodeBlocks, 1250 NumberOfCodeBlocksAsserted, 143 NumberOfCheckSat, 1159 ConstructedInterpolants, 0 QuantifiedInterpolants, 95961 SizeOfPredicates, 19 NumberOfNonLiveVariables, 2660 ConjunctsInSsa, 228 ConjunctsInUnsatCore, 40 InterpolantComputations, 2 PerfectInterpolantSequences, 0/4940 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...