./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/hard.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench/hard.c -s /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/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 e0f1c45558152fd199606f2551fe8da5ad92b45c ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench/hard.c -s /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/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 e0f1c45558152fd199606f2551fe8da5ad92b45c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.1.25-f470102 [2019-12-07 10:20:31,032 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 10:20:31,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 10:20:31,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 10:20:31,041 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 10:20:31,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 10:20:31,043 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 10:20:31,044 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 10:20:31,045 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 10:20:31,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 10:20:31,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 10:20:31,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 10:20:31,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 10:20:31,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 10:20:31,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 10:20:31,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 10:20:31,050 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 10:20:31,051 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 10:20:31,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 10:20:31,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 10:20:31,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 10:20:31,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 10:20:31,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 10:20:31,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 10:20:31,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 10:20:31,059 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 10:20:31,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 10:20:31,059 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 10:20:31,060 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 10:20:31,060 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 10:20:31,060 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 10:20:31,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 10:20:31,061 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 10:20:31,061 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 10:20:31,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 10:20:31,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 10:20:31,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 10:20:31,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 10:20:31,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 10:20:31,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 10:20:31,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 10:20:31,064 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 10:20:31,073 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 10:20:31,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 10:20:31,074 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 10:20:31,074 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 10:20:31,074 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 10:20:31,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 10:20:31,075 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 10:20:31,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 10:20:31,075 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 10:20:31,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 10:20:31,075 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 10:20:31,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 10:20:31,075 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 10:20:31,075 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 10:20:31,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 10:20:31,076 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 10:20:31,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 10:20:31,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 10:20:31,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 10:20:31,076 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 10:20:31,076 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 10:20:31,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 10:20:31,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 10:20:31,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 10:20:31,077 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 10:20:31,077 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 10:20:31,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 10:20:31,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 10:20:31,077 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 10:20:31,077 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_cc394394-8aa4-46e9-a511-102f6febdbc3/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 -> e0f1c45558152fd199606f2551fe8da5ad92b45c [2019-12-07 10:20:31,177 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 10:20:31,187 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 10:20:31,190 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 10:20:31,191 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 10:20:31,191 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 10:20:31,192 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/../../sv-benchmarks/c/nla-digbench/hard.c [2019-12-07 10:20:31,236 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/data/f916edbe4/a33e353fcc4649c6b149229670e8f525/FLAG1e644eb21 [2019-12-07 10:20:31,658 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 10:20:31,658 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/sv-benchmarks/c/nla-digbench/hard.c [2019-12-07 10:20:31,662 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/data/f916edbe4/a33e353fcc4649c6b149229670e8f525/FLAG1e644eb21 [2019-12-07 10:20:31,671 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/data/f916edbe4/a33e353fcc4649c6b149229670e8f525 [2019-12-07 10:20:31,673 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 10:20:31,673 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 10:20:31,674 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 10:20:31,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 10:20:31,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 10:20:31,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 10:20:31" (1/1) ... [2019-12-07 10:20:31,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d50c974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:20:31, skipping insertion in model container [2019-12-07 10:20:31,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 10:20:31" (1/1) ... [2019-12-07 10:20:31,684 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 10:20:31,694 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 10:20:31,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 10:20:31,794 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 10:20:31,838 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 10:20:31,847 INFO L208 MainTranslator]: Completed translation [2019-12-07 10:20:31,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:20:31 WrapperNode [2019-12-07 10:20:31,848 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 10:20:31,848 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 10:20:31,848 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 10:20:31,848 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 10:20:31,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:20:31" (1/1) ... [2019-12-07 10:20:31,858 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:20:31" (1/1) ... [2019-12-07 10:20:31,872 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 10:20:31,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 10:20:31,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 10:20:31,872 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 10:20:31,878 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:20:31" (1/1) ... [2019-12-07 10:20:31,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:20:31" (1/1) ... [2019-12-07 10:20:31,879 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:20:31" (1/1) ... [2019-12-07 10:20:31,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:20:31" (1/1) ... [2019-12-07 10:20:31,881 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:20:31" (1/1) ... [2019-12-07 10:20:31,884 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:20:31" (1/1) ... [2019-12-07 10:20:31,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:20:31" (1/1) ... [2019-12-07 10:20:31,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 10:20:31,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 10:20:31,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 10:20:31,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 10:20:31,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:20:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/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 [2019-12-07 10:20:31,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 10:20:31,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 10:20:32,062 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 10:20:32,062 INFO L287 CfgBuilder]: Removed 20 assume(true) statements. [2019-12-07 10:20:32,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:20:32 BoogieIcfgContainer [2019-12-07 10:20:32,063 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 10:20:32,063 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 10:20:32,064 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 10:20:32,065 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 10:20:32,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 10:20:31" (1/3) ... [2019-12-07 10:20:32,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c53a85a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 10:20:32, skipping insertion in model container [2019-12-07 10:20:32,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:20:31" (2/3) ... [2019-12-07 10:20:32,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c53a85a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 10:20:32, skipping insertion in model container [2019-12-07 10:20:32,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:20:32" (3/3) ... [2019-12-07 10:20:32,067 INFO L109 eAbstractionObserver]: Analyzing ICFG hard.c [2019-12-07 10:20:32,073 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 10:20:32,077 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-12-07 10:20:32,084 INFO L249 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-12-07 10:20:32,099 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 10:20:32,099 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 10:20:32,099 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 10:20:32,099 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 10:20:32,099 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 10:20:32,099 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 10:20:32,099 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 10:20:32,100 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 10:20:32,110 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-12-07 10:20:32,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 10:20:32,114 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:20:32,115 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 10:20:32,116 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:20:32,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:20:32,121 INFO L82 PathProgramCache]: Analyzing trace with hash 963340, now seen corresponding path program 1 times [2019-12-07 10:20:32,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:20:32,126 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787465425] [2019-12-07 10:20:32,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:20:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:20:32,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:20:32,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787465425] [2019-12-07 10:20:32,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 10:20:32,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 10:20:32,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506902067] [2019-12-07 10:20:32,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 10:20:32,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:20:32,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 10:20:32,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 10:20:32,249 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2019-12-07 10:20:32,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:20:32,322 INFO L93 Difference]: Finished difference Result 92 states and 127 transitions. [2019-12-07 10:20:32,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 10:20:32,323 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-12-07 10:20:32,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:20:32,329 INFO L225 Difference]: With dead ends: 92 [2019-12-07 10:20:32,329 INFO L226 Difference]: Without dead ends: 49 [2019-12-07 10:20:32,332 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 10:20:32,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-12-07 10:20:32,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2019-12-07 10:20:32,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 10:20:32,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-12-07 10:20:32,356 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 4 [2019-12-07 10:20:32,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:20:32,357 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-12-07 10:20:32,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 10:20:32,357 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-12-07 10:20:32,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 10:20:32,357 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:20:32,357 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 10:20:32,358 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:20:32,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:20:32,358 INFO L82 PathProgramCache]: Analyzing trace with hash 925925231, now seen corresponding path program 1 times [2019-12-07 10:20:32,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:20:32,358 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354189458] [2019-12-07 10:20:32,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:20:32,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:20:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:20:32,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354189458] [2019-12-07 10:20:32,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 10:20:32,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 10:20:32,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166787051] [2019-12-07 10:20:32,382 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 10:20:32,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:20:32,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 10:20:32,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 10:20:32,383 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 4 states. [2019-12-07 10:20:32,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:20:32,436 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2019-12-07 10:20:32,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 10:20:32,436 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-12-07 10:20:32,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:20:32,437 INFO L225 Difference]: With dead ends: 49 [2019-12-07 10:20:32,438 INFO L226 Difference]: Without dead ends: 47 [2019-12-07 10:20:32,438 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 10:20:32,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-12-07 10:20:32,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2019-12-07 10:20:32,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 10:20:32,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-12-07 10:20:32,445 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 6 [2019-12-07 10:20:32,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:20:32,445 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-12-07 10:20:32,445 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 10:20:32,445 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-12-07 10:20:32,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 10:20:32,445 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:20:32,446 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:20:32,446 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:20:32,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:20:32,446 INFO L82 PathProgramCache]: Analyzing trace with hash 756072562, now seen corresponding path program 1 times [2019-12-07 10:20:32,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:20:32,446 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751370865] [2019-12-07 10:20:32,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:20:32,453 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 10:20:32,453 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [114641446] [2019-12-07 10:20:32,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/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 [2019-12-07 10:20:32,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:20:32,475 INFO L264 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 10:20:32,479 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:20:32,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:20:32,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751370865] [2019-12-07 10:20:32,501 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 10:20:32,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114641446] [2019-12-07 10:20:32,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 10:20:32,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 10:20:32,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465311504] [2019-12-07 10:20:32,502 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 10:20:32,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:20:32,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 10:20:32,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 10:20:32,503 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 4 states. [2019-12-07 10:20:32,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:20:32,559 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2019-12-07 10:20:32,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 10:20:32,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-12-07 10:20:32,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:20:32,561 INFO L225 Difference]: With dead ends: 69 [2019-12-07 10:20:32,561 INFO L226 Difference]: Without dead ends: 47 [2019-12-07 10:20:32,561 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 10:20:32,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-12-07 10:20:32,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2019-12-07 10:20:32,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-07 10:20:32,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-12-07 10:20:32,569 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 8 [2019-12-07 10:20:32,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:20:32,569 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-12-07 10:20:32,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 10:20:32,569 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-12-07 10:20:32,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 10:20:32,570 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:20:32,570 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:20:32,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:20:32,771 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:20:32,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:20:32,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1354107943, now seen corresponding path program 1 times [2019-12-07 10:20:32,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:20:32,772 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946442385] [2019-12-07 10:20:32,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:20:32,783 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 10:20:32,783 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7162404] [2019-12-07 10:20:32,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/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 [2019-12-07 10:20:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:20:32,824 INFO L264 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 10:20:32,826 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:20:32,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:20:32,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946442385] [2019-12-07 10:20:32,848 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 10:20:32,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7162404] [2019-12-07 10:20:32,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 10:20:32,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 10:20:32,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048900852] [2019-12-07 10:20:32,849 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 10:20:32,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:20:32,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 10:20:32,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 10:20:32,850 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 4 states. [2019-12-07 10:20:32,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:20:32,892 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2019-12-07 10:20:32,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 10:20:32,892 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-12-07 10:20:32,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:20:32,893 INFO L225 Difference]: With dead ends: 60 [2019-12-07 10:20:32,893 INFO L226 Difference]: Without dead ends: 49 [2019-12-07 10:20:32,893 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 10:20:32,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-12-07 10:20:32,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2019-12-07 10:20:32,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-12-07 10:20:32,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2019-12-07 10:20:32,898 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 11 [2019-12-07 10:20:32,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:20:32,899 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2019-12-07 10:20:32,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 10:20:32,899 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2019-12-07 10:20:32,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 10:20:32,899 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:20:32,899 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2019-12-07 10:20:33,099 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:20:33,100 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:20:33,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:20:33,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1240091547, now seen corresponding path program 1 times [2019-12-07 10:20:33,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:20:33,101 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511446460] [2019-12-07 10:20:33,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:20:33,112 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 10:20:33,112 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200252957] [2019-12-07 10:20:33,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/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 [2019-12-07 10:20:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:20:33,157 INFO L264 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-07 10:20:33,159 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:20:33,187 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:20:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:20:33,196 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511446460] [2019-12-07 10:20:33,196 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 10:20:33,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200252957] [2019-12-07 10:20:33,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 10:20:33,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-12-07 10:20:33,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115939132] [2019-12-07 10:20:33,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 10:20:33,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:20:33,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 10:20:33,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 10:20:33,198 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 5 states. [2019-12-07 10:20:33,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:20:33,286 INFO L93 Difference]: Finished difference Result 105 states and 122 transitions. [2019-12-07 10:20:33,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 10:20:33,287 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-12-07 10:20:33,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:20:33,288 INFO L225 Difference]: With dead ends: 105 [2019-12-07 10:20:33,288 INFO L226 Difference]: Without dead ends: 68 [2019-12-07 10:20:33,288 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-07 10:20:33,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-07 10:20:33,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2019-12-07 10:20:33,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-12-07 10:20:33,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2019-12-07 10:20:33,295 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 15 [2019-12-07 10:20:33,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:20:33,296 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2019-12-07 10:20:33,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 10:20:33,296 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2019-12-07 10:20:33,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 10:20:33,296 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:20:33,296 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1] [2019-12-07 10:20:33,497 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:20:33,497 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:20:33,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:20:33,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1654747054, now seen corresponding path program 2 times [2019-12-07 10:20:33,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:20:33,498 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135994262] [2019-12-07 10:20:33,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:20:33,508 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 10:20:33,508 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015715428] [2019-12-07 10:20:33,509 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/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 [2019-12-07 10:20:33,537 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 10:20:33,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 10:20:33,538 INFO L264 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-07 10:20:33,539 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:20:33,563 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:20:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:20:33,573 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135994262] [2019-12-07 10:20:33,573 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 10:20:33,573 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015715428] [2019-12-07 10:20:33,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 10:20:33,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-12-07 10:20:33,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273668] [2019-12-07 10:20:33,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 10:20:33,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:20:33,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 10:20:33,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-07 10:20:33,575 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 6 states. [2019-12-07 10:20:33,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:20:33,698 INFO L93 Difference]: Finished difference Result 139 states and 164 transitions. [2019-12-07 10:20:33,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 10:20:33,698 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-12-07 10:20:33,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:20:33,699 INFO L225 Difference]: With dead ends: 139 [2019-12-07 10:20:33,699 INFO L226 Difference]: Without dead ends: 102 [2019-12-07 10:20:33,700 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-12-07 10:20:33,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-12-07 10:20:33,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 82. [2019-12-07 10:20:33,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-12-07 10:20:33,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2019-12-07 10:20:33,708 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 22 [2019-12-07 10:20:33,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:20:33,709 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2019-12-07 10:20:33,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 10:20:33,709 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2019-12-07 10:20:33,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-07 10:20:33,710 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:20:33,710 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:20:33,910 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:20:33,911 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:20:33,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:20:33,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1585354123, now seen corresponding path program 1 times [2019-12-07 10:20:33,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:20:33,912 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390939683] [2019-12-07 10:20:33,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:20:33,926 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 10:20:33,927 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [822958038] [2019-12-07 10:20:33,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/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 [2019-12-07 10:20:33,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:20:33,968 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 27 conjunts are in the unsatisfiable core [2019-12-07 10:20:33,969 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:20:34,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:20:34,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:20:34,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390939683] [2019-12-07 10:20:34,025 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 10:20:34,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822958038] [2019-12-07 10:20:34,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 10:20:34,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-12-07 10:20:34,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972842807] [2019-12-07 10:20:34,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 10:20:34,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:20:34,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 10:20:34,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-07 10:20:34,026 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand 6 states. [2019-12-07 10:20:34,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:20:34,129 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2019-12-07 10:20:34,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 10:20:34,130 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-12-07 10:20:34,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:20:34,130 INFO L225 Difference]: With dead ends: 99 [2019-12-07 10:20:34,130 INFO L226 Difference]: Without dead ends: 97 [2019-12-07 10:20:34,131 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-12-07 10:20:34,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-12-07 10:20:34,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2019-12-07 10:20:34,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-12-07 10:20:34,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 101 transitions. [2019-12-07 10:20:34,139 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 101 transitions. Word has length 24 [2019-12-07 10:20:34,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:20:34,139 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 101 transitions. [2019-12-07 10:20:34,139 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 10:20:34,139 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 101 transitions. [2019-12-07 10:20:34,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-12-07 10:20:34,140 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:20:34,140 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:20:34,340 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:20:34,341 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:20:34,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:20:34,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1185426063, now seen corresponding path program 1 times [2019-12-07 10:20:34,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:20:34,342 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781708274] [2019-12-07 10:20:34,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:20:34,353 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 10:20:34,354 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [629542924] [2019-12-07 10:20:34,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/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 [2019-12-07 10:20:34,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:20:34,409 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-07 10:20:34,411 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:20:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 10:20:34,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781708274] [2019-12-07 10:20:34,439 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 10:20:34,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629542924] [2019-12-07 10:20:34,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 10:20:34,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-12-07 10:20:34,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893299608] [2019-12-07 10:20:34,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 10:20:34,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:20:34,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 10:20:34,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-07 10:20:34,441 INFO L87 Difference]: Start difference. First operand 90 states and 101 transitions. Second operand 6 states. [2019-12-07 10:20:34,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:20:34,525 INFO L93 Difference]: Finished difference Result 120 states and 130 transitions. [2019-12-07 10:20:34,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 10:20:34,525 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2019-12-07 10:20:34,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:20:34,526 INFO L225 Difference]: With dead ends: 120 [2019-12-07 10:20:34,526 INFO L226 Difference]: Without dead ends: 105 [2019-12-07 10:20:34,527 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-12-07 10:20:34,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-07 10:20:34,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2019-12-07 10:20:34,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-07 10:20:34,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 102 transitions. [2019-12-07 10:20:34,536 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 102 transitions. Word has length 29 [2019-12-07 10:20:34,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:20:34,536 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 102 transitions. [2019-12-07 10:20:34,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 10:20:34,536 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 102 transitions. [2019-12-07 10:20:34,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-12-07 10:20:34,537 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:20:34,537 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1] [2019-12-07 10:20:34,738 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:20:34,738 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:20:34,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:20:34,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1363992507, now seen corresponding path program 3 times [2019-12-07 10:20:34,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:20:34,738 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662114466] [2019-12-07 10:20:34,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:20:34,743 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 10:20:34,743 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [830442327] [2019-12-07 10:20:34,743 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/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 [2019-12-07 10:20:34,762 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-07 10:20:34,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 10:20:34,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-07 10:20:34,764 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:20:34,778 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:20:34,808 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:20:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-12-07 10:20:34,837 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662114466] [2019-12-07 10:20:34,837 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 10:20:34,837 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830442327] [2019-12-07 10:20:34,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 10:20:34,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-12-07 10:20:34,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69472837] [2019-12-07 10:20:34,837 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 10:20:34,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:20:34,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 10:20:34,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-07 10:20:34,838 INFO L87 Difference]: Start difference. First operand 89 states and 102 transitions. Second operand 7 states. [2019-12-07 10:20:35,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:20:35,034 INFO L93 Difference]: Finished difference Result 113 states and 129 transitions. [2019-12-07 10:20:35,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 10:20:35,034 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-12-07 10:20:35,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:20:35,036 INFO L225 Difference]: With dead ends: 113 [2019-12-07 10:20:35,036 INFO L226 Difference]: Without dead ends: 103 [2019-12-07 10:20:35,037 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-12-07 10:20:35,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-12-07 10:20:35,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2019-12-07 10:20:35,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-07 10:20:35,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2019-12-07 10:20:35,044 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 29 [2019-12-07 10:20:35,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:20:35,045 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2019-12-07 10:20:35,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 10:20:35,045 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2019-12-07 10:20:35,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-07 10:20:35,045 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:20:35,046 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:20:35,246 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:20:35,247 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:20:35,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:20:35,247 INFO L82 PathProgramCache]: Analyzing trace with hash -803819852, now seen corresponding path program 2 times [2019-12-07 10:20:35,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:20:35,248 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980781172] [2019-12-07 10:20:35,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:20:35,257 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 10:20:35,257 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1076325584] [2019-12-07 10:20:35,257 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/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 [2019-12-07 10:20:35,309 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 10:20:35,309 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 10:20:35,310 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 31 conjunts are in the unsatisfiable core [2019-12-07 10:20:35,311 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:20:35,353 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:20:35,363 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:20:35,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980781172] [2019-12-07 10:20:35,364 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 10:20:35,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076325584] [2019-12-07 10:20:35,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 10:20:35,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-12-07 10:20:35,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722078029] [2019-12-07 10:20:35,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 10:20:35,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:20:35,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 10:20:35,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-12-07 10:20:35,365 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand 7 states. [2019-12-07 10:20:35,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:20:35,525 INFO L93 Difference]: Finished difference Result 113 states and 127 transitions. [2019-12-07 10:20:35,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 10:20:35,526 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2019-12-07 10:20:35,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:20:35,527 INFO L225 Difference]: With dead ends: 113 [2019-12-07 10:20:35,527 INFO L226 Difference]: Without dead ends: 111 [2019-12-07 10:20:35,527 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-12-07 10:20:35,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-12-07 10:20:35,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2019-12-07 10:20:35,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-07 10:20:35,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 117 transitions. [2019-12-07 10:20:35,536 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 117 transitions. Word has length 31 [2019-12-07 10:20:35,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:20:35,536 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 117 transitions. [2019-12-07 10:20:35,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 10:20:35,536 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 117 transitions. [2019-12-07 10:20:35,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-12-07 10:20:35,537 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:20:35,537 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2019-12-07 10:20:35,738 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:20:35,738 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:20:35,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:20:35,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1656121185, now seen corresponding path program 3 times [2019-12-07 10:20:35,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:20:35,739 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285762838] [2019-12-07 10:20:35,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:20:35,750 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 10:20:35,751 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773718801] [2019-12-07 10:20:35,751 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/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 [2019-12-07 10:20:35,897 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 10:20:35,898 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 10:20:35,899 INFO L264 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-07 10:20:35,900 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:20:35,979 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:20:35,992 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:20:35,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285762838] [2019-12-07 10:20:35,993 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 10:20:35,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773718801] [2019-12-07 10:20:35,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 10:20:35,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-12-07 10:20:35,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238491632] [2019-12-07 10:20:35,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 10:20:35,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:20:35,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 10:20:35,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-12-07 10:20:35,994 INFO L87 Difference]: Start difference. First operand 103 states and 117 transitions. Second operand 9 states. [2019-12-07 10:20:36,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:20:36,230 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2019-12-07 10:20:36,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 10:20:36,230 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2019-12-07 10:20:36,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:20:36,231 INFO L225 Difference]: With dead ends: 115 [2019-12-07 10:20:36,231 INFO L226 Difference]: Without dead ends: 104 [2019-12-07 10:20:36,232 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-12-07 10:20:36,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-07 10:20:36,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2019-12-07 10:20:36,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-07 10:20:36,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2019-12-07 10:20:36,238 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 37 [2019-12-07 10:20:36,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:20:36,239 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2019-12-07 10:20:36,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 10:20:36,239 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2019-12-07 10:20:36,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-12-07 10:20:36,240 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:20:36,240 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 10:20:36,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:20:36,441 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:20:36,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:20:36,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1263094175, now seen corresponding path program 1 times [2019-12-07 10:20:36,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:20:36,442 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139384418] [2019-12-07 10:20:36,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:20:36,451 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 10:20:36,452 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [593167036] [2019-12-07 10:20:36,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/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 [2019-12-07 10:20:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:20:36,494 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 10:20:36,495 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:20:36,512 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:20:36,513 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:20:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 10:20:36,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139384418] [2019-12-07 10:20:36,563 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 10:20:36,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593167036] [2019-12-07 10:20:36,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 10:20:36,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 10:20:36,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730465240] [2019-12-07 10:20:36,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 10:20:36,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:20:36,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 10:20:36,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-12-07 10:20:36,565 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 6 states. [2019-12-07 10:20:45,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:20:45,156 INFO L93 Difference]: Finished difference Result 146 states and 159 transitions. [2019-12-07 10:20:45,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 10:20:45,156 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2019-12-07 10:20:45,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:20:45,157 INFO L225 Difference]: With dead ends: 146 [2019-12-07 10:20:45,157 INFO L226 Difference]: Without dead ends: 103 [2019-12-07 10:20:45,158 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-07 10:20:45,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-12-07 10:20:45,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 79. [2019-12-07 10:20:45,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-12-07 10:20:45,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2019-12-07 10:20:45,163 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 37 [2019-12-07 10:20:45,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:20:45,163 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2019-12-07 10:20:45,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 10:20:45,163 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2019-12-07 10:20:45,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-12-07 10:20:45,164 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:20:45,164 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:20:45,364 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:20:45,365 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:20:45,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:20:45,365 INFO L82 PathProgramCache]: Analyzing trace with hash -2081381013, now seen corresponding path program 4 times [2019-12-07 10:20:45,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:20:45,365 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285973503] [2019-12-07 10:20:45,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:20:45,370 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 10:20:45,370 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282007726] [2019-12-07 10:20:45,370 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/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 [2019-12-07 10:20:45,401 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 10:20:45,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 10:20:45,402 INFO L264 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 43 conjunts are in the unsatisfiable core [2019-12-07 10:20:45,404 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:20:45,414 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:20:45,428 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:20:45,450 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:20:46,199 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:20:46,200 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:20:46,201 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:20:46,201 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:20:46,203 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:20:46,204 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:20:46,205 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:20:46,206 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:21:04,074 WARN L192 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2019-12-07 10:21:21,177 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:21:21,242 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 33 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:21:21,242 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285973503] [2019-12-07 10:21:21,242 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 10:21:21,242 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282007726] [2019-12-07 10:21:21,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 10:21:21,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-12-07 10:21:21,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125318831] [2019-12-07 10:21:21,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-07 10:21:21,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:21:21,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-07 10:21:21,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=141, Unknown=16, NotChecked=0, Total=210 [2019-12-07 10:21:21,243 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand 15 states. [2019-12-07 10:21:52,895 WARN L192 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 37 DAG size of output: 18 [2019-12-07 10:22:12,179 WARN L192 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 22 [2019-12-07 10:22:59,806 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-12-07 10:23:00,007 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:23:00,008 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:100) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.pop(ManagedScript.java:130) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:660) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:264) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:279) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:161) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:714) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:627) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:454) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.io.IOException: Stream closed at java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:433) at java.io.OutputStream.write(OutputStream.java:116) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140) at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:297) at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141) at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229) at java.io.BufferedWriter.flush(BufferedWriter.java:254) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:120) ... 31 more [2019-12-07 10:23:00,013 INFO L168 Benchmark]: Toolchain (without parser) took 148339.15 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.5 MB). Free memory was 938.0 MB in the beginning and 986.5 MB in the end (delta: -48.5 MB). Peak memory consumption was 71.0 MB. Max. memory is 11.5 GB. [2019-12-07 10:23:00,014 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 955.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 10:23:00,014 INFO L168 Benchmark]: CACSL2BoogieTranslator took 173.67 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 83.9 MB). Free memory was 938.0 MB in the beginning and 1.1 GB in the end (delta: -140.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-12-07 10:23:00,015 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.61 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 10:23:00,015 INFO L168 Benchmark]: Boogie Preprocessor took 14.43 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 10:23:00,015 INFO L168 Benchmark]: RCFGBuilder took 176.51 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. [2019-12-07 10:23:00,016 INFO L168 Benchmark]: TraceAbstraction took 147947.94 ms. Allocated memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 35.7 MB). Free memory was 1.1 GB in the beginning and 986.5 MB in the end (delta: 70.3 MB). Peak memory consumption was 106.0 MB. Max. memory is 11.5 GB. [2019-12-07 10:23:00,017 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 955.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 173.67 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 83.9 MB). Free memory was 938.0 MB in the beginning and 1.1 GB in the end (delta: -140.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 23.61 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.43 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 176.51 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 147947.94 ms. Allocated memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 35.7 MB). Free memory was 1.1 GB in the beginning and 986.5 MB in the end (delta: 70.3 MB). Peak memory consumption was 106.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-f470102 [2019-12-07 10:23:01,104 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 10:23:01,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 10:23:01,113 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 10:23:01,114 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 10:23:01,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 10:23:01,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 10:23:01,117 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 10:23:01,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 10:23:01,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 10:23:01,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 10:23:01,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 10:23:01,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 10:23:01,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 10:23:01,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 10:23:01,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 10:23:01,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 10:23:01,123 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 10:23:01,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 10:23:01,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 10:23:01,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 10:23:01,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 10:23:01,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 10:23:01,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 10:23:01,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 10:23:01,131 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 10:23:01,131 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 10:23:01,132 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 10:23:01,132 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 10:23:01,133 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 10:23:01,133 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 10:23:01,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 10:23:01,134 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 10:23:01,135 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 10:23:01,135 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 10:23:01,135 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 10:23:01,136 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 10:23:01,136 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 10:23:01,136 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 10:23:01,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 10:23:01,137 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 10:23:01,138 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-12-07 10:23:01,147 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 10:23:01,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 10:23:01,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 10:23:01,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 10:23:01,149 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 10:23:01,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 10:23:01,149 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 10:23:01,149 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 10:23:01,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 10:23:01,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 10:23:01,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 10:23:01,150 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 10:23:01,150 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-12-07 10:23:01,150 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-12-07 10:23:01,150 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 10:23:01,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 10:23:01,150 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 10:23:01,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 10:23:01,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 10:23:01,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 10:23:01,151 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 10:23:01,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 10:23:01,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 10:23:01,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 10:23:01,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 10:23:01,151 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 10:23:01,151 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-12-07 10:23:01,152 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-12-07 10:23:01,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 10:23:01,152 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 10:23:01,152 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 10:23:01,152 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_cc394394-8aa4-46e9-a511-102f6febdbc3/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 -> e0f1c45558152fd199606f2551fe8da5ad92b45c [2019-12-07 10:23:01,315 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 10:23:01,325 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 10:23:01,328 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 10:23:01,329 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 10:23:01,330 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 10:23:01,330 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/../../sv-benchmarks/c/nla-digbench/hard.c [2019-12-07 10:23:01,372 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/data/b0efbae74/45330f26773e425e91b8da94545e148d/FLAGe46f0f0cf [2019-12-07 10:23:01,806 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 10:23:01,807 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/sv-benchmarks/c/nla-digbench/hard.c [2019-12-07 10:23:01,811 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/data/b0efbae74/45330f26773e425e91b8da94545e148d/FLAGe46f0f0cf [2019-12-07 10:23:01,820 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/data/b0efbae74/45330f26773e425e91b8da94545e148d [2019-12-07 10:23:01,821 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 10:23:01,822 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 10:23:01,823 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 10:23:01,823 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 10:23:01,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 10:23:01,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 10:23:01" (1/1) ... [2019-12-07 10:23:01,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@548fb14a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:23:01, skipping insertion in model container [2019-12-07 10:23:01,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 10:23:01" (1/1) ... [2019-12-07 10:23:01,832 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 10:23:01,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 10:23:01,944 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 10:23:01,947 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 10:23:01,960 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 10:23:01,969 INFO L208 MainTranslator]: Completed translation [2019-12-07 10:23:01,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:23:01 WrapperNode [2019-12-07 10:23:01,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 10:23:01,970 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 10:23:01,970 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 10:23:01,970 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 10:23:01,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:23:01" (1/1) ... [2019-12-07 10:23:01,980 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:23:01" (1/1) ... [2019-12-07 10:23:02,023 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 10:23:02,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 10:23:02,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 10:23:02,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 10:23:02,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:23:01" (1/1) ... [2019-12-07 10:23:02,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:23:01" (1/1) ... [2019-12-07 10:23:02,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:23:01" (1/1) ... [2019-12-07 10:23:02,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:23:01" (1/1) ... [2019-12-07 10:23:02,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:23:01" (1/1) ... [2019-12-07 10:23:02,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:23:01" (1/1) ... [2019-12-07 10:23:02,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:23:01" (1/1) ... [2019-12-07 10:23:02,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 10:23:02,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 10:23:02,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 10:23:02,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 10:23:02,040 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:23:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/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 [2019-12-07 10:23:02,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 10:23:02,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 10:23:02,281 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 10:23:02,281 INFO L287 CfgBuilder]: Removed 20 assume(true) statements. [2019-12-07 10:23:02,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:23:02 BoogieIcfgContainer [2019-12-07 10:23:02,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 10:23:02,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 10:23:02,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 10:23:02,285 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 10:23:02,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 10:23:01" (1/3) ... [2019-12-07 10:23:02,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e769743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 10:23:02, skipping insertion in model container [2019-12-07 10:23:02,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:23:01" (2/3) ... [2019-12-07 10:23:02,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e769743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 10:23:02, skipping insertion in model container [2019-12-07 10:23:02,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:23:02" (3/3) ... [2019-12-07 10:23:02,287 INFO L109 eAbstractionObserver]: Analyzing ICFG hard.c [2019-12-07 10:23:02,294 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 10:23:02,298 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-12-07 10:23:02,307 INFO L249 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-12-07 10:23:02,323 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 10:23:02,323 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 10:23:02,323 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 10:23:02,323 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 10:23:02,323 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 10:23:02,323 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 10:23:02,323 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 10:23:02,323 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 10:23:02,334 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-12-07 10:23:02,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 10:23:02,337 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:23:02,338 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 10:23:02,338 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:23:02,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:23:02,342 INFO L82 PathProgramCache]: Analyzing trace with hash 963340, now seen corresponding path program 1 times [2019-12-07 10:23:02,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 10:23:02,349 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1693674096] [2019-12-07 10:23:02,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2019-12-07 10:23:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:23:02,377 INFO L264 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 10:23:02,380 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:23:02,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:23:02,413 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 10:23:02,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:23:02,425 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1693674096] [2019-12-07 10:23:02,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 10:23:02,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-12-07 10:23:02,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687798169] [2019-12-07 10:23:02,430 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 10:23:02,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 10:23:02,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 10:23:02,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 10:23:02,440 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 5 states. [2019-12-07 10:23:02,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:23:02,618 INFO L93 Difference]: Finished difference Result 92 states and 127 transitions. [2019-12-07 10:23:02,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 10:23:02,620 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2019-12-07 10:23:02,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:23:02,629 INFO L225 Difference]: With dead ends: 92 [2019-12-07 10:23:02,629 INFO L226 Difference]: Without dead ends: 49 [2019-12-07 10:23:02,632 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-12-07 10:23:02,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-12-07 10:23:02,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2019-12-07 10:23:02,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 10:23:02,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-12-07 10:23:02,664 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 4 [2019-12-07 10:23:02,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:23:02,664 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-12-07 10:23:02,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 10:23:02,665 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-12-07 10:23:02,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 10:23:02,665 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:23:02,665 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 10:23:02,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-12-07 10:23:02,867 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:23:02,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:23:02,868 INFO L82 PathProgramCache]: Analyzing trace with hash 925925231, now seen corresponding path program 1 times [2019-12-07 10:23:02,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 10:23:02,870 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105385774] [2019-12-07 10:23:02,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2019-12-07 10:23:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:23:02,904 INFO L264 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 10:23:02,905 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:23:02,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:23:02,933 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 10:23:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:23:02,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105385774] [2019-12-07 10:23:02,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 10:23:02,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-12-07 10:23:02,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700817624] [2019-12-07 10:23:02,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 10:23:02,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 10:23:02,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 10:23:02,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 10:23:02,956 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 5 states. [2019-12-07 10:23:03,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:23:03,150 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2019-12-07 10:23:03,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 10:23:03,151 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-12-07 10:23:03,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:23:03,151 INFO L225 Difference]: With dead ends: 49 [2019-12-07 10:23:03,151 INFO L226 Difference]: Without dead ends: 47 [2019-12-07 10:23:03,152 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-12-07 10:23:03,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-12-07 10:23:03,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2019-12-07 10:23:03,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 10:23:03,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-12-07 10:23:03,157 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 6 [2019-12-07 10:23:03,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:23:03,157 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-12-07 10:23:03,157 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 10:23:03,157 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-12-07 10:23:03,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 10:23:03,158 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:23:03,158 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:23:03,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-12-07 10:23:03,359 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:23:03,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:23:03,359 INFO L82 PathProgramCache]: Analyzing trace with hash 756072562, now seen corresponding path program 1 times [2019-12-07 10:23:03,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 10:23:03,360 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194340615] [2019-12-07 10:23:03,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2019-12-07 10:23:03,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:23:03,394 INFO L264 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 10:23:03,395 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:23:03,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:23:03,421 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 10:23:03,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:23:03,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194340615] [2019-12-07 10:23:03,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 10:23:03,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-12-07 10:23:03,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568391252] [2019-12-07 10:23:03,498 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 10:23:03,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 10:23:03,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 10:23:03,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 10:23:03,499 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2019-12-07 10:23:06,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:23:06,096 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2019-12-07 10:23:06,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 10:23:06,098 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2019-12-07 10:23:06,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:23:06,099 INFO L225 Difference]: With dead ends: 93 [2019-12-07 10:23:06,099 INFO L226 Difference]: Without dead ends: 71 [2019-12-07 10:23:06,100 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-12-07 10:23:06,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-12-07 10:23:06,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2019-12-07 10:23:06,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-07 10:23:06,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2019-12-07 10:23:06,110 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 8 [2019-12-07 10:23:06,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:23:06,110 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2019-12-07 10:23:06,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 10:23:06,110 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2019-12-07 10:23:06,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 10:23:06,110 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:23:06,111 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:23:06,311 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2019-12-07 10:23:06,312 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:23:06,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:23:06,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1354107943, now seen corresponding path program 1 times [2019-12-07 10:23:06,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 10:23:06,314 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078457448] [2019-12-07 10:23:06,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2019-12-07 10:23:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:23:06,378 INFO L264 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 10:23:06,379 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:23:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:23:06,394 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 10:23:06,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:23:06,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078457448] [2019-12-07 10:23:06,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 10:23:06,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-12-07 10:23:06,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193264318] [2019-12-07 10:23:06,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 10:23:06,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 10:23:06,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 10:23:06,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 10:23:06,441 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 5 states. [2019-12-07 10:23:06,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:23:06,612 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2019-12-07 10:23:06,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 10:23:06,612 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-12-07 10:23:06,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:23:06,613 INFO L225 Difference]: With dead ends: 71 [2019-12-07 10:23:06,613 INFO L226 Difference]: Without dead ends: 60 [2019-12-07 10:23:06,613 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-12-07 10:23:06,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-07 10:23:06,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2019-12-07 10:23:06,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-07 10:23:06,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2019-12-07 10:23:06,620 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 11 [2019-12-07 10:23:06,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:23:06,621 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2019-12-07 10:23:06,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 10:23:06,621 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2019-12-07 10:23:06,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 10:23:06,622 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:23:06,622 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1] [2019-12-07 10:23:06,822 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2019-12-07 10:23:06,823 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:23:06,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:23:06,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1654747054, now seen corresponding path program 1 times [2019-12-07 10:23:06,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 10:23:06,825 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [419406234] [2019-12-07 10:23:06,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2019-12-07 10:23:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:23:06,917 INFO L264 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 10:23:06,918 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:23:06,965 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:23:06,986 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:23:06,986 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 10:23:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 2 refuted. 7 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:23:09,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [419406234] [2019-12-07 10:23:09,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 10:23:09,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2019-12-07 10:23:09,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629004317] [2019-12-07 10:23:09,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 10:23:09,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 10:23:09,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 10:23:09,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=60, Unknown=1, NotChecked=0, Total=90 [2019-12-07 10:23:09,320 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 10 states. [2019-12-07 10:23:12,738 WARN L192 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 19 [2019-12-07 10:23:14,988 WARN L192 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 14 [2019-12-07 10:23:17,291 WARN L192 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 18 [2019-12-07 10:23:21,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:23:21,344 INFO L93 Difference]: Finished difference Result 114 states and 128 transitions. [2019-12-07 10:23:21,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-07 10:23:21,347 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-12-07 10:23:21,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:23:21,348 INFO L225 Difference]: With dead ends: 114 [2019-12-07 10:23:21,348 INFO L226 Difference]: Without dead ends: 104 [2019-12-07 10:23:21,348 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=142, Invalid=277, Unknown=1, NotChecked=0, Total=420 [2019-12-07 10:23:21,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-07 10:23:21,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 64. [2019-12-07 10:23:21,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-12-07 10:23:21,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2019-12-07 10:23:21,357 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 22 [2019-12-07 10:23:21,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:23:21,357 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2019-12-07 10:23:21,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 10:23:21,358 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2019-12-07 10:23:21,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-07 10:23:21,358 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:23:21,358 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:23:21,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2019-12-07 10:23:21,559 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:23:21,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:23:21,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1585354123, now seen corresponding path program 1 times [2019-12-07 10:23:21,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 10:23:21,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352596901] [2019-12-07 10:23:21,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2019-12-07 10:23:21,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:23:21,801 INFO L264 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-07 10:23:21,803 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:23:22,269 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-07 10:23:22,659 WARN L192 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2019-12-07 10:23:22,661 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:23:22,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:23:22,955 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 10:23:24,161 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2019-12-07 10:23:25,506 WARN L192 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-07 10:23:27,101 WARN L192 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-07 10:23:29,327 WARN L192 SmtUtils]: Spent 989.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-12-07 10:23:29,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:23:29,332 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352596901] [2019-12-07 10:23:29,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 10:23:29,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2019-12-07 10:23:29,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075432063] [2019-12-07 10:23:29,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 10:23:29,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 10:23:29,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 10:23:29,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2019-12-07 10:23:29,334 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 14 states. [2019-12-07 10:23:32,211 WARN L192 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-12-07 10:23:33,319 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-07 10:23:34,272 WARN L192 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-12-07 10:23:35,566 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2019-12-07 10:23:39,545 WARN L192 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 46 [2019-12-07 10:23:45,449 WARN L192 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-12-07 10:23:48,299 WARN L192 SmtUtils]: Spent 903.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2019-12-07 10:23:55,059 WARN L192 SmtUtils]: Spent 982.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2019-12-07 10:23:57,503 WARN L192 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2019-12-07 10:24:00,223 WARN L192 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2019-12-07 10:24:04,499 WARN L192 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 32 [2019-12-07 10:24:08,898 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-12-07 10:24:15,522 WARN L192 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 45 [2019-12-07 10:24:22,100 WARN L192 SmtUtils]: Spent 1.53 s on a formula simplification that was a NOOP. DAG size: 41 [2019-12-07 10:24:25,112 WARN L192 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-12-07 10:24:29,364 WARN L192 SmtUtils]: Spent 722.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2019-12-07 10:24:33,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:24:33,823 INFO L93 Difference]: Finished difference Result 150 states and 163 transitions. [2019-12-07 10:24:33,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-07 10:24:33,842 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2019-12-07 10:24:33,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:24:33,843 INFO L225 Difference]: With dead ends: 150 [2019-12-07 10:24:33,843 INFO L226 Difference]: Without dead ends: 124 [2019-12-07 10:24:33,843 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 42.0s TimeCoverageRelationStatistics Valid=281, Invalid=841, Unknown=0, NotChecked=0, Total=1122 [2019-12-07 10:24:33,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-12-07 10:24:33,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 76. [2019-12-07 10:24:33,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-07 10:24:33,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2019-12-07 10:24:33,853 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 24 [2019-12-07 10:24:33,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:24:33,853 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2019-12-07 10:24:33,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 10:24:33,853 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2019-12-07 10:24:33,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-07 10:24:33,854 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:24:33,854 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:24:34,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2019-12-07 10:24:34,055 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:24:34,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:24:34,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1187920850, now seen corresponding path program 1 times [2019-12-07 10:24:34,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 10:24:34,056 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [865463848] [2019-12-07 10:24:34,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2019-12-07 10:24:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:24:34,185 INFO L264 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 10:24:34,186 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:24:34,937 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:24:35,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:24:35,296 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 10:24:37,961 WARN L192 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2019-12-07 10:24:39,604 WARN L192 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-07 10:24:39,613 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:24:39,613 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [865463848] [2019-12-07 10:24:39,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 10:24:39,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2019-12-07 10:24:39,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389790644] [2019-12-07 10:24:39,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 10:24:39,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 10:24:39,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 10:24:39,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-12-07 10:24:39,615 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand 12 states. [2019-12-07 10:24:46,715 WARN L192 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2019-12-07 10:24:48,492 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-12-07 10:24:51,964 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-12-07 10:24:55,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:24:55,886 INFO L93 Difference]: Finished difference Result 109 states and 123 transitions. [2019-12-07 10:24:55,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-07 10:24:55,887 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2019-12-07 10:24:55,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:24:55,887 INFO L225 Difference]: With dead ends: 109 [2019-12-07 10:24:55,887 INFO L226 Difference]: Without dead ends: 83 [2019-12-07 10:24:55,888 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2019-12-07 10:24:55,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-12-07 10:24:55,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2019-12-07 10:24:55,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-12-07 10:24:55,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2019-12-07 10:24:55,896 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 26 [2019-12-07 10:24:55,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:24:55,897 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2019-12-07 10:24:55,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 10:24:55,897 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2019-12-07 10:24:55,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-12-07 10:24:55,898 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:24:55,898 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:24:56,098 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2019-12-07 10:24:56,099 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:24:56,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:24:56,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1185426063, now seen corresponding path program 1 times [2019-12-07 10:24:56,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 10:24:56,101 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058224580] [2019-12-07 10:24:56,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2019-12-07 10:24:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:24:56,571 INFO L264 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 23 conjunts are in the unsatisfiable core [2019-12-07 10:24:56,573 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:24:57,032 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-07 10:24:57,622 WARN L192 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2019-12-07 10:25:00,008 WARN L192 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2019-12-07 10:25:00,010 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:25:02,511 WARN L192 SmtUtils]: Spent 939.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 23 [2019-12-07 10:25:03,695 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-07 10:25:03,696 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:25:03,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:25:03,832 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 10:25:04,409 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:25:04,914 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2019-12-07 10:25:05,391 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-07 10:25:05,392 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:25:06,168 WARN L192 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-07 10:25:07,920 WARN L192 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2019-12-07 10:25:10,682 WARN L192 SmtUtils]: Spent 719.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2019-12-07 10:25:13,435 WARN L192 SmtUtils]: Spent 778.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2019-12-07 10:25:18,804 WARN L192 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2019-12-07 10:25:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:25:18,812 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058224580] [2019-12-07 10:25:18,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 10:25:18,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2019-12-07 10:25:18,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735576652] [2019-12-07 10:25:18,812 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-07 10:25:18,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 10:25:18,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-07 10:25:18,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2019-12-07 10:25:18,813 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand 21 states. [2019-12-07 10:25:25,320 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2019-12-07 10:25:46,720 WARN L192 SmtUtils]: Spent 9.08 s on a formula simplification that was a NOOP. DAG size: 54 [2019-12-07 10:26:05,553 WARN L192 SmtUtils]: Spent 3.40 s on a formula simplification that was a NOOP. DAG size: 51 [2019-12-07 10:26:22,196 WARN L192 SmtUtils]: Spent 5.87 s on a formula simplification that was a NOOP. DAG size: 59 [2019-12-07 10:26:28,407 WARN L192 SmtUtils]: Spent 2.22 s on a formula simplification that was a NOOP. DAG size: 36 [2019-12-07 10:26:36,379 WARN L192 SmtUtils]: Spent 2.95 s on a formula simplification that was a NOOP. DAG size: 31 [2019-12-07 10:26:38,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:26:38,758 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2019-12-07 10:26:38,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 10:26:38,761 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2019-12-07 10:26:38,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:26:38,762 INFO L225 Difference]: With dead ends: 80 [2019-12-07 10:26:38,762 INFO L226 Difference]: Without dead ends: 65 [2019-12-07 10:26:38,763 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 72.9s TimeCoverageRelationStatistics Valid=280, Invalid=709, Unknown=3, NotChecked=0, Total=992 [2019-12-07 10:26:38,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-07 10:26:38,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-12-07 10:26:38,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-12-07 10:26:38,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2019-12-07 10:26:38,769 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 29 [2019-12-07 10:26:38,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:26:38,769 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2019-12-07 10:26:38,769 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-07 10:26:38,769 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2019-12-07 10:26:38,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-07 10:26:38,770 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:26:38,770 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:26:38,970 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2019-12-07 10:26:38,971 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:26:38,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:26:38,971 INFO L82 PathProgramCache]: Analyzing trace with hash -803819852, now seen corresponding path program 2 times [2019-12-07 10:26:38,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 10:26:38,972 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650482481] [2019-12-07 10:26:38,972 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2019-12-07 10:26:39,081 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 10:26:39,082 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-12-07 10:26:39,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 10:26:39,187 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-12-07 10:26:39,187 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 10:26:39,387 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2019-12-07 10:26:39,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 10:26:39 BoogieIcfgContainer [2019-12-07 10:26:39,404 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 10:26:39,404 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 10:26:39,404 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 10:26:39,404 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 10:26:39,405 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:23:02" (3/4) ... [2019-12-07 10:26:39,406 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 10:26:39,443 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_cc394394-8aa4-46e9-a511-102f6febdbc3/bin/uautomizer/witness.graphml [2019-12-07 10:26:39,443 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 10:26:39,444 INFO L168 Benchmark]: Toolchain (without parser) took 217621.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 185.6 MB). Free memory was 953.7 MB in the beginning and 1.2 GB in the end (delta: -218.7 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 10:26:39,444 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 10:26:39,445 INFO L168 Benchmark]: CACSL2BoogieTranslator took 146.79 ms. Allocated memory is still 1.0 GB. Free memory was 953.7 MB in the beginning and 941.6 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2019-12-07 10:26:39,445 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 122.2 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -176.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2019-12-07 10:26:39,445 INFO L168 Benchmark]: Boogie Preprocessor took 16.23 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. [2019-12-07 10:26:39,446 INFO L168 Benchmark]: RCFGBuilder took 242.44 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: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 11.5 GB. [2019-12-07 10:26:39,446 INFO L168 Benchmark]: TraceAbstraction took 217120.92 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 63.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -79.3 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 10:26:39,446 INFO L168 Benchmark]: Witness Printer took 38.88 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 10:26:39,448 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 146.79 ms. Allocated memory is still 1.0 GB. Free memory was 953.7 MB in the beginning and 941.6 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 53.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 122.2 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -176.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.23 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 242.44 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: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 217120.92 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 63.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -79.3 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 38.88 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L18] int A, B; [L19] int r, d, p, q; [L20] A = __VERIFIER_nondet_int() [L21] B = __VERIFIER_nondet_int() [L24] r = A [L25] d = B [L26] p = 1 [L27] q = 0 [L29] COND TRUE 1 [L10] COND FALSE !(!(cond)) [L10] COND FALSE !(!(cond)) [L10] COND FALSE !(!(cond)) [L33] COND FALSE !(!(r >= d)) [L35] d = 2 * d [L36] p = 2 * p [L29] COND TRUE 1 [L10] COND FALSE !(!(cond)) [L10] COND FALSE !(!(cond)) [L10] COND FALSE !(!(cond)) [L33] COND FALSE !(!(r >= d)) [L35] d = 2 * d [L36] p = 2 * p [L29] COND TRUE 1 [L10] COND FALSE !(!(cond)) [L10] COND FALSE !(!(cond)) [L10] COND FALSE !(!(cond)) [L33] COND TRUE !(r >= d) [L39] COND TRUE 1 [L10] COND FALSE !(!(cond)) [L10] COND FALSE !(!(cond)) [L43] COND FALSE !(!(p != 1)) [L45] d = d / 2 [L46] p = p / 2 [L47] COND TRUE r >= d [L48] r = r - d [L49] q = q + p [L39] COND TRUE 1 [L10] COND TRUE !(cond) [L12] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 36 locations, 7 error locations. Result: UNSAFE, OverallTime: 217.0s, OverallIterations: 9, TraceHistogramMax: 3, AutomataDifference: 175.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 171 SDtfs, 555 SDslu, 528 SDs, 0 SdLazy, 995 SolverSat, 454 SolverUnsat, 13 SolverUnknown, 0 SolverNotchecked, 75.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 309 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 133.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=7, 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, 8 MinimizatonAttempts, 157 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 37.9s InterpolantComputationTime, 161 NumberOfCodeBlocks, 161 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 244 ConstructedInterpolants, 16 QuantifiedInterpolants, 110500 SizeOfPredicates, 51 NumberOfNonLiveVariables, 265 ConjunctsInSsa, 81 ConjunctsInUnsatCore, 16 InterpolantComputations, 8 PerfectInterpolantSequences, 10/102 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...