./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum05.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum05.i -s /tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/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 1633e43e3f340ce4ae371cafc3d1ea0a9dad5739 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-15 22:25:11,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 22:25:11,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 22:25:11,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 22:25:11,019 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 22:25:11,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 22:25:11,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 22:25:11,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 22:25:11,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 22:25:11,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 22:25:11,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 22:25:11,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 22:25:11,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 22:25:11,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 22:25:11,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 22:25:11,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 22:25:11,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 22:25:11,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 22:25:11,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 22:25:11,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 22:25:11,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 22:25:11,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 22:25:11,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 22:25:11,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 22:25:11,046 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 22:25:11,046 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 22:25:11,047 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 22:25:11,048 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 22:25:11,048 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 22:25:11,049 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 22:25:11,050 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 22:25:11,050 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 22:25:11,051 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 22:25:11,052 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 22:25:11,053 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 22:25:11,053 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 22:25:11,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 22:25:11,054 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 22:25:11,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 22:25:11,056 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 22:25:11,056 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 22:25:11,057 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 22:25:11,072 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 22:25:11,072 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 22:25:11,074 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 22:25:11,074 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 22:25:11,074 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 22:25:11,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 22:25:11,075 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 22:25:11,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 22:25:11,075 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 22:25:11,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 22:25:11,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 22:25:11,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 22:25:11,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 22:25:11,076 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 22:25:11,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 22:25:11,077 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 22:25:11,077 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 22:25:11,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 22:25:11,078 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 22:25:11,078 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 22:25:11,078 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 22:25:11,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 22:25:11,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 22:25:11,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 22:25:11,079 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 22:25:11,079 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 22:25:11,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 22:25:11,080 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 22:25:11,080 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_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/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 -> 1633e43e3f340ce4ae371cafc3d1ea0a9dad5739 [2019-11-15 22:25:11,107 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 22:25:11,116 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 22:25:11,120 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 22:25:11,121 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 22:25:11,121 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 22:25:11,122 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/bin/uautomizer/../../sv-benchmarks/c/reducercommutativity/rangesum05.i [2019-11-15 22:25:11,175 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/bin/uautomizer/data/295eb2180/932f5108371843d0af37b86e803a624a/FLAG6e9ad9f80 [2019-11-15 22:25:11,564 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 22:25:11,565 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/sv-benchmarks/c/reducercommutativity/rangesum05.i [2019-11-15 22:25:11,572 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/bin/uautomizer/data/295eb2180/932f5108371843d0af37b86e803a624a/FLAG6e9ad9f80 [2019-11-15 22:25:11,905 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/bin/uautomizer/data/295eb2180/932f5108371843d0af37b86e803a624a [2019-11-15 22:25:11,908 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 22:25:11,910 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 22:25:11,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 22:25:11,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 22:25:11,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 22:25:11,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 10:25:11" (1/1) ... [2019-11-15 22:25:11,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5786a32f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:11, skipping insertion in model container [2019-11-15 22:25:11,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 10:25:11" (1/1) ... [2019-11-15 22:25:11,928 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 22:25:11,951 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 22:25:12,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 22:25:12,248 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 22:25:12,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 22:25:12,284 INFO L192 MainTranslator]: Completed translation [2019-11-15 22:25:12,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:12 WrapperNode [2019-11-15 22:25:12,285 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 22:25:12,286 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 22:25:12,286 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 22:25:12,286 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 22:25:12,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:12" (1/1) ... [2019-11-15 22:25:12,317 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:12" (1/1) ... [2019-11-15 22:25:12,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 22:25:12,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 22:25:12,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 22:25:12,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 22:25:12,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:12" (1/1) ... [2019-11-15 22:25:12,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:12" (1/1) ... [2019-11-15 22:25:12,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:12" (1/1) ... [2019-11-15 22:25:12,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:12" (1/1) ... [2019-11-15 22:25:12,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:12" (1/1) ... [2019-11-15 22:25:12,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:12" (1/1) ... [2019-11-15 22:25:12,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:12" (1/1) ... [2019-11-15 22:25:12,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 22:25:12,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 22:25:12,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 22:25:12,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 22:25:12,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 22:25:12,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-15 22:25:12,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 22:25:12,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 22:25:12,443 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-15 22:25:12,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-15 22:25:12,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-15 22:25:12,797 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 22:25:12,798 INFO L284 CfgBuilder]: Removed 17 assume(true) statements. [2019-11-15 22:25:12,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:25:12 BoogieIcfgContainer [2019-11-15 22:25:12,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 22:25:12,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 22:25:12,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 22:25:12,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 22:25:12,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 10:25:11" (1/3) ... [2019-11-15 22:25:12,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7908bc45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 10:25:12, skipping insertion in model container [2019-11-15 22:25:12,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:12" (2/3) ... [2019-11-15 22:25:12,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7908bc45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 10:25:12, skipping insertion in model container [2019-11-15 22:25:12,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:25:12" (3/3) ... [2019-11-15 22:25:12,805 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2019-11-15 22:25:12,815 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 22:25:12,822 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 22:25:12,833 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 22:25:12,852 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 22:25:12,852 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 22:25:12,852 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 22:25:12,853 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 22:25:12,853 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 22:25:12,853 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 22:25:12,853 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 22:25:12,853 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 22:25:12,867 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-11-15 22:25:12,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-15 22:25:12,874 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:25:12,875 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:25:12,877 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:25:12,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:25:12,882 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2019-11-15 22:25:12,890 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:25:12,891 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425471253] [2019-11-15 22:25:12,891 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:12,891 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:12,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:25:12,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:25:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:25:13,002 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425471253] [2019-11-15 22:25:13,003 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:25:13,003 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-15 22:25:13,003 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753820478] [2019-11-15 22:25:13,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-15 22:25:13,007 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:25:13,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-15 22:25:13,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 22:25:13,019 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2019-11-15 22:25:13,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:25:13,036 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2019-11-15 22:25:13,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-15 22:25:13,038 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-11-15 22:25:13,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:25:13,047 INFO L225 Difference]: With dead ends: 56 [2019-11-15 22:25:13,048 INFO L226 Difference]: Without dead ends: 26 [2019-11-15 22:25:13,051 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 22:25:13,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-15 22:25:13,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-15 22:25:13,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-15 22:25:13,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2019-11-15 22:25:13,079 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 17 [2019-11-15 22:25:13,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:25:13,079 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2019-11-15 22:25:13,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-15 22:25:13,080 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2019-11-15 22:25:13,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-15 22:25:13,080 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:25:13,081 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:25:13,081 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:25:13,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:25:13,081 INFO L82 PathProgramCache]: Analyzing trace with hash 164788593, now seen corresponding path program 1 times [2019-11-15 22:25:13,081 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:25:13,082 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67083644] [2019-11-15 22:25:13,082 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:13,082 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:13,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:25:13,095 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 22:25:13,096 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [318855218] [2019-11-15 22:25:13,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:25:13,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-15 22:25:13,222 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:25:13,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:25:13,245 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67083644] [2019-11-15 22:25:13,246 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 22:25:13,246 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318855218] [2019-11-15 22:25:13,246 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:25:13,246 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 22:25:13,246 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687079194] [2019-11-15 22:25:13,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 22:25:13,248 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:25:13,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 22:25:13,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 22:25:13,249 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 3 states. [2019-11-15 22:25:13,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:25:13,269 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2019-11-15 22:25:13,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 22:25:13,269 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-15 22:25:13,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:25:13,270 INFO L225 Difference]: With dead ends: 50 [2019-11-15 22:25:13,270 INFO L226 Difference]: Without dead ends: 28 [2019-11-15 22:25:13,271 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 22:25:13,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-15 22:25:13,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-15 22:25:13,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-15 22:25:13,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2019-11-15 22:25:13,277 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2019-11-15 22:25:13,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:25:13,278 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2019-11-15 22:25:13,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 22:25:13,278 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2019-11-15 22:25:13,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-15 22:25:13,279 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:25:13,279 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:25:13,482 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:13,484 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:25:13,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:25:13,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2019-11-15 22:25:13,485 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:25:13,485 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026157169] [2019-11-15 22:25:13,485 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:13,486 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:13,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:25:13,506 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 22:25:13,507 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405974323] [2019-11-15 22:25:13,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:13,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:25:13,566 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-15 22:25:13,567 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:25:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:25:13,581 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026157169] [2019-11-15 22:25:13,581 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 22:25:13,581 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405974323] [2019-11-15 22:25:13,582 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:25:13,582 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 22:25:13,582 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117606227] [2019-11-15 22:25:13,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 22:25:13,583 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:25:13,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 22:25:13,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 22:25:13,583 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2019-11-15 22:25:13,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:25:13,679 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2019-11-15 22:25:13,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 22:25:13,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-15 22:25:13,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:25:13,681 INFO L225 Difference]: With dead ends: 57 [2019-11-15 22:25:13,681 INFO L226 Difference]: Without dead ends: 36 [2019-11-15 22:25:13,682 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 22:25:13,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-15 22:25:13,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-11-15 22:25:13,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-15 22:25:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2019-11-15 22:25:13,687 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2019-11-15 22:25:13,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:25:13,687 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2019-11-15 22:25:13,688 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 22:25:13,690 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2019-11-15 22:25:13,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-15 22:25:13,692 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:25:13,692 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:25:13,892 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:13,893 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:25:13,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:25:13,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2019-11-15 22:25:13,893 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:25:13,893 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440119305] [2019-11-15 22:25:13,894 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:13,894 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:13,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:25:13,921 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 22:25:13,921 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142302502] [2019-11-15 22:25:13,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:25:13,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 22:25:14,005 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:25:14,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-15 22:25:14,013 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440119305] [2019-11-15 22:25:14,013 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 22:25:14,013 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142302502] [2019-11-15 22:25:14,013 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:25:14,014 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 22:25:14,014 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968856009] [2019-11-15 22:25:14,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 22:25:14,014 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:25:14,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 22:25:14,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 22:25:14,015 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 3 states. [2019-11-15 22:25:14,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:25:14,128 INFO L93 Difference]: Finished difference Result 75 states and 100 transitions. [2019-11-15 22:25:14,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 22:25:14,129 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-11-15 22:25:14,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:25:14,131 INFO L225 Difference]: With dead ends: 75 [2019-11-15 22:25:14,131 INFO L226 Difference]: Without dead ends: 54 [2019-11-15 22:25:14,131 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 22:25:14,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-15 22:25:14,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2019-11-15 22:25:14,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-15 22:25:14,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2019-11-15 22:25:14,139 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 28 [2019-11-15 22:25:14,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:25:14,139 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2019-11-15 22:25:14,139 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 22:25:14,140 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2019-11-15 22:25:14,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-15 22:25:14,141 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:25:14,141 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:25:14,348 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:14,348 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:25:14,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:25:14,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1168464304, now seen corresponding path program 1 times [2019-11-15 22:25:14,349 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:25:14,349 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737196292] [2019-11-15 22:25:14,350 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:14,350 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:14,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:25:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:25:14,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-15 22:25:14,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737196292] [2019-11-15 22:25:14,404 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:25:14,404 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-15 22:25:14,405 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83126995] [2019-11-15 22:25:14,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 22:25:14,405 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:25:14,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 22:25:14,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 22:25:14,406 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand 4 states. [2019-11-15 22:25:14,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:25:14,497 INFO L93 Difference]: Finished difference Result 85 states and 118 transitions. [2019-11-15 22:25:14,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 22:25:14,497 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2019-11-15 22:25:14,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:25:14,498 INFO L225 Difference]: With dead ends: 85 [2019-11-15 22:25:14,498 INFO L226 Difference]: Without dead ends: 54 [2019-11-15 22:25:14,499 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 22:25:14,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-15 22:25:14,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2019-11-15 22:25:14,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-15 22:25:14,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2019-11-15 22:25:14,505 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 28 [2019-11-15 22:25:14,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:25:14,505 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2019-11-15 22:25:14,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 22:25:14,506 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2019-11-15 22:25:14,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-15 22:25:14,507 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:25:14,507 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:25:14,507 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:25:14,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:25:14,508 INFO L82 PathProgramCache]: Analyzing trace with hash -483510003, now seen corresponding path program 1 times [2019-11-15 22:25:14,508 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:25:14,508 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418282937] [2019-11-15 22:25:14,508 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:14,508 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:14,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:25:14,520 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 22:25:14,520 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557511916] [2019-11-15 22:25:14,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:25:14,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-15 22:25:14,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:25:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-15 22:25:14,625 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418282937] [2019-11-15 22:25:14,625 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 22:25:14,626 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557511916] [2019-11-15 22:25:14,626 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:25:14,626 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 22:25:14,626 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975621627] [2019-11-15 22:25:14,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 22:25:14,627 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:25:14,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 22:25:14,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 22:25:14,628 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 3 states. [2019-11-15 22:25:14,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:25:14,646 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2019-11-15 22:25:14,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 22:25:14,650 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2019-11-15 22:25:14,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:25:14,651 INFO L225 Difference]: With dead ends: 54 [2019-11-15 22:25:14,651 INFO L226 Difference]: Without dead ends: 41 [2019-11-15 22:25:14,652 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 22:25:14,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-15 22:25:14,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-11-15 22:25:14,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-15 22:25:14,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2019-11-15 22:25:14,657 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 37 [2019-11-15 22:25:14,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:25:14,658 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2019-11-15 22:25:14,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 22:25:14,658 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2019-11-15 22:25:14,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-15 22:25:14,659 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:25:14,659 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:25:14,860 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:14,860 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:25:14,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:25:14,861 INFO L82 PathProgramCache]: Analyzing trace with hash -623311861, now seen corresponding path program 1 times [2019-11-15 22:25:14,861 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:25:14,861 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033559442] [2019-11-15 22:25:14,861 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:14,861 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:14,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:25:14,884 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 22:25:14,884 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210284146] [2019-11-15 22:25:14,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:25:14,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 22:25:14,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:25:14,980 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-15 22:25:14,980 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033559442] [2019-11-15 22:25:14,981 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 22:25:14,981 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210284146] [2019-11-15 22:25:14,981 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-15 22:25:14,982 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-15 22:25:14,982 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242791908] [2019-11-15 22:25:14,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 22:25:14,983 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:25:14,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 22:25:14,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 22:25:14,984 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 4 states. [2019-11-15 22:25:15,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:25:15,011 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2019-11-15 22:25:15,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 22:25:15,014 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2019-11-15 22:25:15,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:25:15,014 INFO L225 Difference]: With dead ends: 78 [2019-11-15 22:25:15,015 INFO L226 Difference]: Without dead ends: 43 [2019-11-15 22:25:15,015 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 22:25:15,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-15 22:25:15,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-11-15 22:25:15,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-15 22:25:15,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2019-11-15 22:25:15,027 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 39 [2019-11-15 22:25:15,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:25:15,027 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2019-11-15 22:25:15,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 22:25:15,028 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2019-11-15 22:25:15,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-15 22:25:15,032 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:25:15,032 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:25:15,233 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:15,233 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:25:15,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:25:15,234 INFO L82 PathProgramCache]: Analyzing trace with hash -526389047, now seen corresponding path program 2 times [2019-11-15 22:25:15,234 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:25:15,234 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677609307] [2019-11-15 22:25:15,234 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:15,234 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:15,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:25:15,245 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 22:25:15,245 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1094733690] [2019-11-15 22:25:15,245 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:15,323 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 22:25:15,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:25:15,324 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 22:25:15,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:25:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-15 22:25:15,348 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677609307] [2019-11-15 22:25:15,348 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 22:25:15,348 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094733690] [2019-11-15 22:25:15,348 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-15 22:25:15,348 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-15 22:25:15,349 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756000783] [2019-11-15 22:25:15,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 22:25:15,349 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:25:15,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 22:25:15,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 22:25:15,350 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 4 states. [2019-11-15 22:25:15,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:25:15,418 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2019-11-15 22:25:15,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 22:25:15,419 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2019-11-15 22:25:15,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:25:15,420 INFO L225 Difference]: With dead ends: 86 [2019-11-15 22:25:15,420 INFO L226 Difference]: Without dead ends: 54 [2019-11-15 22:25:15,420 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 22:25:15,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-15 22:25:15,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2019-11-15 22:25:15,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-15 22:25:15,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2019-11-15 22:25:15,427 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 41 [2019-11-15 22:25:15,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:25:15,427 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2019-11-15 22:25:15,427 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 22:25:15,427 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2019-11-15 22:25:15,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-15 22:25:15,428 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:25:15,429 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:25:15,636 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:15,636 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:25:15,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:25:15,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1393104750, now seen corresponding path program 3 times [2019-11-15 22:25:15,637 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:25:15,637 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716832872] [2019-11-15 22:25:15,637 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:15,637 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:15,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:25:15,648 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 22:25:15,648 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2138843927] [2019-11-15 22:25:15,648 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:15,719 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-15 22:25:15,719 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:25:15,720 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 22:25:15,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:25:15,759 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-15 22:25:15,759 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716832872] [2019-11-15 22:25:15,760 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 22:25:15,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138843927] [2019-11-15 22:25:15,761 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-15 22:25:15,761 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-15 22:25:15,762 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068359576] [2019-11-15 22:25:15,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 22:25:15,763 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:25:15,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 22:25:15,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 22:25:15,764 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 4 states. [2019-11-15 22:25:15,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:25:15,790 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2019-11-15 22:25:15,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 22:25:15,794 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2019-11-15 22:25:15,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:25:15,795 INFO L225 Difference]: With dead ends: 70 [2019-11-15 22:25:15,795 INFO L226 Difference]: Without dead ends: 54 [2019-11-15 22:25:15,796 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 22:25:15,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-15 22:25:15,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-11-15 22:25:15,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-15 22:25:15,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2019-11-15 22:25:15,802 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 50 [2019-11-15 22:25:15,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:25:15,803 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2019-11-15 22:25:15,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 22:25:15,803 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2019-11-15 22:25:15,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-15 22:25:15,808 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:25:15,808 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:25:16,012 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:16,012 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:25:16,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:25:16,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1656359148, now seen corresponding path program 4 times [2019-11-15 22:25:16,012 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:25:16,013 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944183492] [2019-11-15 22:25:16,013 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:16,013 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:16,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:25:16,023 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 22:25:16,023 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087119687] [2019-11-15 22:25:16,023 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:16,082 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 22:25:16,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:25:16,084 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 22:25:16,086 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:25:16,127 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-15 22:25:16,127 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944183492] [2019-11-15 22:25:16,127 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 22:25:16,128 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087119687] [2019-11-15 22:25:16,128 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-15 22:25:16,128 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-15 22:25:16,129 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250067608] [2019-11-15 22:25:16,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 22:25:16,129 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:25:16,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 22:25:16,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-15 22:25:16,130 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand 5 states. [2019-11-15 22:25:16,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:25:16,212 INFO L93 Difference]: Finished difference Result 102 states and 124 transitions. [2019-11-15 22:25:16,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 22:25:16,212 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2019-11-15 22:25:16,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:25:16,213 INFO L225 Difference]: With dead ends: 102 [2019-11-15 22:25:16,213 INFO L226 Difference]: Without dead ends: 62 [2019-11-15 22:25:16,214 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-15 22:25:16,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-15 22:25:16,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-15 22:25:16,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-15 22:25:16,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2019-11-15 22:25:16,220 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 52 [2019-11-15 22:25:16,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:25:16,221 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2019-11-15 22:25:16,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 22:25:16,221 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2019-11-15 22:25:16,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-15 22:25:16,222 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:25:16,222 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:25:16,426 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:16,427 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:25:16,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:25:16,427 INFO L82 PathProgramCache]: Analyzing trace with hash -2133276057, now seen corresponding path program 5 times [2019-11-15 22:25:16,427 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:25:16,428 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067480910] [2019-11-15 22:25:16,428 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:16,428 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:16,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:25:16,442 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 22:25:16,442 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [135215483] [2019-11-15 22:25:16,443 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:16,517 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-15 22:25:16,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:25:16,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 22:25:16,521 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:25:16,539 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-15 22:25:16,539 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067480910] [2019-11-15 22:25:16,540 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 22:25:16,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135215483] [2019-11-15 22:25:16,540 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:25:16,540 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-15 22:25:16,540 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853190004] [2019-11-15 22:25:16,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 22:25:16,541 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:25:16,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 22:25:16,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 22:25:16,542 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 4 states. [2019-11-15 22:25:16,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:25:16,586 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2019-11-15 22:25:16,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 22:25:16,587 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2019-11-15 22:25:16,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:25:16,588 INFO L225 Difference]: With dead ends: 111 [2019-11-15 22:25:16,588 INFO L226 Difference]: Without dead ends: 71 [2019-11-15 22:25:16,589 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 22:25:16,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-15 22:25:16,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2019-11-15 22:25:16,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-15 22:25:16,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2019-11-15 22:25:16,596 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 61 [2019-11-15 22:25:16,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:25:16,597 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2019-11-15 22:25:16,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 22:25:16,597 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2019-11-15 22:25:16,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-15 22:25:16,598 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:25:16,598 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:25:16,798 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:16,799 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:25:16,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:25:16,799 INFO L82 PathProgramCache]: Analyzing trace with hash 2021142629, now seen corresponding path program 1 times [2019-11-15 22:25:16,799 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:25:16,800 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049399881] [2019-11-15 22:25:16,800 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:16,800 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:16,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:25:16,812 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 22:25:16,812 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053616876] [2019-11-15 22:25:16,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:25:16,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 22:25:16,904 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:25:16,938 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-15 22:25:16,938 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049399881] [2019-11-15 22:25:16,939 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 22:25:16,939 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053616876] [2019-11-15 22:25:16,939 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-15 22:25:16,939 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-15 22:25:16,939 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124214965] [2019-11-15 22:25:16,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 22:25:16,945 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:25:16,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 22:25:16,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-15 22:25:16,946 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 5 states. [2019-11-15 22:25:16,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:25:16,966 INFO L93 Difference]: Finished difference Result 120 states and 134 transitions. [2019-11-15 22:25:16,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 22:25:16,967 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2019-11-15 22:25:16,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:25:16,968 INFO L225 Difference]: With dead ends: 120 [2019-11-15 22:25:16,968 INFO L226 Difference]: Without dead ends: 65 [2019-11-15 22:25:16,969 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-15 22:25:16,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-15 22:25:16,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-11-15 22:25:16,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-15 22:25:16,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2019-11-15 22:25:16,979 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 61 [2019-11-15 22:25:16,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:25:16,979 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2019-11-15 22:25:16,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 22:25:16,979 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2019-11-15 22:25:16,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-15 22:25:16,986 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:25:16,987 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:25:17,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:17,192 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:25:17,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:25:17,192 INFO L82 PathProgramCache]: Analyzing trace with hash 265673379, now seen corresponding path program 2 times [2019-11-15 22:25:17,193 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:25:17,193 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748666781] [2019-11-15 22:25:17,193 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:17,193 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:17,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:25:17,207 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 22:25:17,207 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [531348931] [2019-11-15 22:25:17,207 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:17,310 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 22:25:17,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:25:17,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 22:25:17,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:25:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-15 22:25:17,343 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748666781] [2019-11-15 22:25:17,343 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 22:25:17,343 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531348931] [2019-11-15 22:25:17,343 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-15 22:25:17,344 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-15 22:25:17,344 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913031659] [2019-11-15 22:25:17,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 22:25:17,344 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:25:17,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 22:25:17,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-15 22:25:17,345 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 6 states. [2019-11-15 22:25:17,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:25:17,369 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2019-11-15 22:25:17,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 22:25:17,371 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2019-11-15 22:25:17,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:25:17,372 INFO L225 Difference]: With dead ends: 122 [2019-11-15 22:25:17,372 INFO L226 Difference]: Without dead ends: 67 [2019-11-15 22:25:17,372 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-15 22:25:17,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-15 22:25:17,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-15 22:25:17,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-15 22:25:17,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2019-11-15 22:25:17,378 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 63 [2019-11-15 22:25:17,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:25:17,378 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2019-11-15 22:25:17,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 22:25:17,378 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2019-11-15 22:25:17,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-15 22:25:17,379 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:25:17,379 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:25:17,592 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:17,592 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:25:17,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:25:17,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1181871457, now seen corresponding path program 3 times [2019-11-15 22:25:17,593 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:25:17,593 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140910865] [2019-11-15 22:25:17,593 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:17,593 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:17,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:25:17,619 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 22:25:17,621 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731805261] [2019-11-15 22:25:17,622 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:17,700 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-15 22:25:17,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:25:17,704 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 22:25:17,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:25:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-11-15 22:25:17,730 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140910865] [2019-11-15 22:25:17,730 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 22:25:17,731 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731805261] [2019-11-15 22:25:17,731 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-15 22:25:17,731 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-15 22:25:17,731 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639526062] [2019-11-15 22:25:17,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 22:25:17,732 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:25:17,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 22:25:17,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-15 22:25:17,733 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 5 states. [2019-11-15 22:25:17,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:25:17,754 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2019-11-15 22:25:17,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 22:25:17,754 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2019-11-15 22:25:17,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:25:17,755 INFO L225 Difference]: With dead ends: 88 [2019-11-15 22:25:17,755 INFO L226 Difference]: Without dead ends: 69 [2019-11-15 22:25:17,756 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-15 22:25:17,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-15 22:25:17,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-11-15 22:25:17,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-15 22:25:17,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2019-11-15 22:25:17,761 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 65 [2019-11-15 22:25:17,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:25:17,762 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2019-11-15 22:25:17,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 22:25:17,762 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2019-11-15 22:25:17,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-15 22:25:17,762 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:25:17,763 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:25:17,963 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:17,963 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:25:17,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:25:17,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1302328097, now seen corresponding path program 4 times [2019-11-15 22:25:17,964 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:25:17,964 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654181219] [2019-11-15 22:25:17,964 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:17,964 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:17,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:25:17,976 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 22:25:17,977 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [219867037] [2019-11-15 22:25:17,977 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:18,043 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 22:25:18,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:25:18,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 22:25:18,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:25:18,078 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-11-15 22:25:18,078 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654181219] [2019-11-15 22:25:18,078 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 22:25:18,079 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219867037] [2019-11-15 22:25:18,079 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-15 22:25:18,079 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-15 22:25:18,079 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760092247] [2019-11-15 22:25:18,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 22:25:18,080 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:25:18,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 22:25:18,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-15 22:25:18,080 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 7 states. [2019-11-15 22:25:18,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:25:18,207 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2019-11-15 22:25:18,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 22:25:18,208 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2019-11-15 22:25:18,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:25:18,209 INFO L225 Difference]: With dead ends: 120 [2019-11-15 22:25:18,209 INFO L226 Difference]: Without dead ends: 77 [2019-11-15 22:25:18,209 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-15 22:25:18,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-15 22:25:18,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-11-15 22:25:18,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-15 22:25:18,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2019-11-15 22:25:18,214 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 67 [2019-11-15 22:25:18,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:25:18,214 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2019-11-15 22:25:18,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 22:25:18,215 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2019-11-15 22:25:18,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-15 22:25:18,215 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:25:18,216 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:25:18,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:18,420 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:25:18,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:25:18,420 INFO L82 PathProgramCache]: Analyzing trace with hash -153484414, now seen corresponding path program 5 times [2019-11-15 22:25:18,421 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:25:18,421 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483748486] [2019-11-15 22:25:18,421 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:18,421 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:18,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:25:18,435 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 22:25:18,436 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150572161] [2019-11-15 22:25:18,436 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:18,536 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-15 22:25:18,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:25:18,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 22:25:18,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:25:18,581 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-11-15 22:25:18,581 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483748486] [2019-11-15 22:25:18,581 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 22:25:18,581 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150572161] [2019-11-15 22:25:18,582 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-15 22:25:18,582 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-15 22:25:18,582 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536131225] [2019-11-15 22:25:18,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 22:25:18,583 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:25:18,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 22:25:18,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-15 22:25:18,584 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 7 states. [2019-11-15 22:25:18,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:25:18,606 INFO L93 Difference]: Finished difference Result 145 states and 165 transitions. [2019-11-15 22:25:18,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 22:25:18,608 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 76 [2019-11-15 22:25:18,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:25:18,609 INFO L225 Difference]: With dead ends: 145 [2019-11-15 22:25:18,609 INFO L226 Difference]: Without dead ends: 79 [2019-11-15 22:25:18,609 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-15 22:25:18,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-15 22:25:18,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-11-15 22:25:18,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-15 22:25:18,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2019-11-15 22:25:18,617 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 76 [2019-11-15 22:25:18,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:25:18,619 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2019-11-15 22:25:18,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 22:25:18,619 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2019-11-15 22:25:18,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-15 22:25:18,620 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:25:18,620 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:25:18,824 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:18,824 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:25:18,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:25:18,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1735993980, now seen corresponding path program 6 times [2019-11-15 22:25:18,825 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:25:18,825 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672182156] [2019-11-15 22:25:18,825 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:18,825 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:18,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:25:18,839 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 22:25:18,840 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786864895] [2019-11-15 22:25:18,840 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:19,427 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-15 22:25:19,427 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:25:19,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 22:25:19,430 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:25:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2019-11-15 22:25:19,450 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672182156] [2019-11-15 22:25:19,450 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 22:25:19,450 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786864895] [2019-11-15 22:25:19,450 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-15 22:25:19,451 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-15 22:25:19,451 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589190843] [2019-11-15 22:25:19,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 22:25:19,451 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:25:19,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 22:25:19,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-15 22:25:19,452 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 6 states. [2019-11-15 22:25:19,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:25:19,485 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2019-11-15 22:25:19,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 22:25:19,486 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2019-11-15 22:25:19,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:25:19,486 INFO L225 Difference]: With dead ends: 103 [2019-11-15 22:25:19,486 INFO L226 Difference]: Without dead ends: 81 [2019-11-15 22:25:19,487 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-15 22:25:19,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-15 22:25:19,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-11-15 22:25:19,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-15 22:25:19,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2019-11-15 22:25:19,491 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 78 [2019-11-15 22:25:19,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:25:19,491 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2019-11-15 22:25:19,491 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 22:25:19,491 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2019-11-15 22:25:19,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-15 22:25:19,492 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:25:19,492 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:25:19,696 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:19,697 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:25:19,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:25:19,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1345801862, now seen corresponding path program 7 times [2019-11-15 22:25:19,697 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:25:19,698 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174348430] [2019-11-15 22:25:19,698 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:19,698 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:19,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:25:19,724 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 22:25:19,724 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1115368738] [2019-11-15 22:25:19,725 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 22:25:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 22:25:20,316 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 22:25:20,316 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-15 22:25:20,521 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:25:20,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 10:25:20 BoogieIcfgContainer [2019-11-15 22:25:20,597 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 22:25:20,597 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 22:25:20,597 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 22:25:20,598 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 22:25:20,598 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:25:12" (3/4) ... [2019-11-15 22:25:20,601 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-15 22:25:20,709 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f7165b8c-34d6-4e7b-b43c-1104c2e02a86/bin/uautomizer/witness.graphml [2019-11-15 22:25:20,709 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 22:25:20,711 INFO L168 Benchmark]: Toolchain (without parser) took 8801.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 201.9 MB). Free memory was 944.7 MB in the beginning and 969.9 MB in the end (delta: -25.2 MB). Peak memory consumption was 176.7 MB. Max. memory is 11.5 GB. [2019-11-15 22:25:20,712 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 22:25:20,712 INFO L168 Benchmark]: CACSL2BoogieTranslator took 374.86 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -178.2 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2019-11-15 22:25:20,713 INFO L168 Benchmark]: Boogie Procedure Inliner took 66.71 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 22:25:20,713 INFO L168 Benchmark]: Boogie Preprocessor took 29.69 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: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-11-15 22:25:20,714 INFO L168 Benchmark]: RCFGBuilder took 416.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 11.5 GB. [2019-11-15 22:25:20,714 INFO L168 Benchmark]: TraceAbstraction took 7797.19 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 68.7 MB). Free memory was 1.1 GB in the beginning and 979.8 MB in the end (delta: 114.8 MB). Peak memory consumption was 183.4 MB. Max. memory is 11.5 GB. [2019-11-15 22:25:20,715 INFO L168 Benchmark]: Witness Printer took 112.10 ms. Allocated memory is still 1.2 GB. Free memory was 979.8 MB in the beginning and 969.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2019-11-15 22:25:20,717 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 374.86 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -178.2 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 66.71 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 29.69 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: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 416.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 7797.19 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 68.7 MB). Free memory was 1.1 GB in the beginning and 979.8 MB in the end (delta: 114.8 MB). Peak memory consumption was 183.4 MB. Max. memory is 11.5 GB. * Witness Printer took 112.10 ms. Allocated memory is still 1.2 GB. Free memory was 979.8 MB in the beginning and 969.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 50]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L31] int x[5]; [L5] int i; [L6] i = 0 [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND FALSE !(i < 5) [L33] int temp; [L34] int ret; [L35] int ret2; [L36] int ret5; [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND FALSE !(i < 5) [L23] COND TRUE cnt !=0 [L24] return ret / cnt; [L38] ret = rangesum(x) [L40] EXPR x[0] [L40] temp=x[0] [L40] EXPR x[1] [L40] x[0] = x[1] [L40] x[1] = temp [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND FALSE !(i < 5) [L23] COND TRUE cnt !=0 [L24] return ret / cnt; [L41] ret2 = rangesum(x) [L42] EXPR x[0] [L42] temp=x[0] [L43] int i =0 ; [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND FALSE !(i<5 -1) [L46] x[5 -1] = temp [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND FALSE !(i < 5) [L23] COND TRUE cnt !=0 [L24] return ret / cnt; [L47] ret5 = rangesum(x) [L49] COND TRUE ret != ret2 || ret !=ret5 [L50] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Result: UNSAFE, OverallTime: 7.7s, OverallIterations: 18, TraceHistogramMax: 5, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 523 SDtfs, 187 SDslu, 565 SDs, 0 SdLazy, 304 SolverSat, 107 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 745 GetRequests, 704 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 46 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 879 NumberOfCodeBlocks, 816 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 782 ConstructedInterpolants, 0 QuantifiedInterpolants, 52874 SizeOfPredicates, 14 NumberOfNonLiveVariables, 2293 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 17 InterpolantComputations, 7 PerfectInterpolantSequences, 745/820 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...