./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_m5.c --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_93435d50-85f6-4b30-b29f-a4097f93014e/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_m5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/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 360f2044aa56b2f54e5bb369a0e89d5e20d519de ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_m5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/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 360f2044aa56b2f54e5bb369a0e89d5e20d519de ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: IllegalStateException: Do not try to interpolate when trace is feasible --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-15 23:30:53,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 23:30:53,964 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 23:30:53,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 23:30:53,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 23:30:53,975 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 23:30:53,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 23:30:53,978 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 23:30:53,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 23:30:53,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 23:30:53,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 23:30:53,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 23:30:53,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 23:30:53,983 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 23:30:53,984 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 23:30:53,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 23:30:53,987 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 23:30:53,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 23:30:53,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 23:30:53,991 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 23:30:53,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 23:30:53,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 23:30:53,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 23:30:53,998 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 23:30:54,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 23:30:54,001 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 23:30:54,001 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 23:30:54,002 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 23:30:54,002 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 23:30:54,003 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 23:30:54,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 23:30:54,004 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 23:30:54,004 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 23:30:54,005 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 23:30:54,006 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 23:30:54,006 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 23:30:54,007 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 23:30:54,007 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 23:30:54,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 23:30:54,008 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 23:30:54,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 23:30:54,009 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 23:30:54,028 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 23:30:54,029 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 23:30:54,030 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 23:30:54,030 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 23:30:54,030 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 23:30:54,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 23:30:54,031 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 23:30:54,031 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 23:30:54,031 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 23:30:54,031 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 23:30:54,032 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 23:30:54,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 23:30:54,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 23:30:54,032 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 23:30:54,032 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 23:30:54,033 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 23:30:54,033 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 23:30:54,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 23:30:54,033 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 23:30:54,034 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 23:30:54,034 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 23:30:54,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 23:30:54,034 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 23:30:54,034 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 23:30:54,035 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 23:30:54,035 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 23:30:54,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 23:30:54,035 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 23:30:54,036 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_93435d50-85f6-4b30-b29f-a4097f93014e/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 -> 360f2044aa56b2f54e5bb369a0e89d5e20d519de [2019-11-15 23:30:54,079 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 23:30:54,090 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 23:30:54,093 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 23:30:54,094 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 23:30:54,095 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 23:30:54,095 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/bin/uautomizer/../../sv-benchmarks/c/array-crafted/zero_sum_m5.c [2019-11-15 23:30:54,149 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/bin/uautomizer/data/89c5d4713/6fe14d6046094b43a9b83ce96e4c181e/FLAGa80057d94 [2019-11-15 23:30:54,535 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 23:30:54,536 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/sv-benchmarks/c/array-crafted/zero_sum_m5.c [2019-11-15 23:30:54,545 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/bin/uautomizer/data/89c5d4713/6fe14d6046094b43a9b83ce96e4c181e/FLAGa80057d94 [2019-11-15 23:30:54,556 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/bin/uautomizer/data/89c5d4713/6fe14d6046094b43a9b83ce96e4c181e [2019-11-15 23:30:54,562 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 23:30:54,563 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 23:30:54,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 23:30:54,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 23:30:54,567 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 23:30:54,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:30:54" (1/1) ... [2019-11-15 23:30:54,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65287642 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:30:54, skipping insertion in model container [2019-11-15 23:30:54,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:30:54" (1/1) ... [2019-11-15 23:30:54,577 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 23:30:54,592 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 23:30:54,809 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:30:54,813 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 23:30:54,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:30:54,856 INFO L192 MainTranslator]: Completed translation [2019-11-15 23:30:54,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:30:54 WrapperNode [2019-11-15 23:30:54,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 23:30:54,858 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 23:30:54,858 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 23:30:54,858 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 23:30:54,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:30:54" (1/1) ... [2019-11-15 23:30:54,874 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:30:54" (1/1) ... [2019-11-15 23:30:54,898 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 23:30:54,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 23:30:54,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 23:30:54,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 23:30:54,907 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:30:54" (1/1) ... [2019-11-15 23:30:54,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:30:54" (1/1) ... [2019-11-15 23:30:54,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:30:54" (1/1) ... [2019-11-15 23:30:54,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:30:54" (1/1) ... [2019-11-15 23:30:54,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:30:54" (1/1) ... [2019-11-15 23:30:54,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:30:54" (1/1) ... [2019-11-15 23:30:54,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:30:54" (1/1) ... [2019-11-15 23:30:54,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 23:30:54,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 23:30:54,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 23:30:54,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 23:30:54,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:30:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/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 23:30:54,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-15 23:30:54,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 23:30:54,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 23:30:54,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-15 23:30:54,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-15 23:30:54,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-15 23:30:55,382 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 23:30:55,382 INFO L284 CfgBuilder]: Removed 17 assume(true) statements. [2019-11-15 23:30:55,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:30:55 BoogieIcfgContainer [2019-11-15 23:30:55,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 23:30:55,384 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 23:30:55,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 23:30:55,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 23:30:55,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 11:30:54" (1/3) ... [2019-11-15 23:30:55,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb33754 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:30:55, skipping insertion in model container [2019-11-15 23:30:55,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:30:54" (2/3) ... [2019-11-15 23:30:55,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb33754 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:30:55, skipping insertion in model container [2019-11-15 23:30:55,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:30:55" (3/3) ... [2019-11-15 23:30:55,393 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_m5.c [2019-11-15 23:30:55,402 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 23:30:55,410 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 23:30:55,420 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 23:30:55,449 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 23:30:55,449 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 23:30:55,451 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 23:30:55,451 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 23:30:55,452 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 23:30:55,452 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 23:30:55,452 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 23:30:55,452 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 23:30:55,473 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2019-11-15 23:30:55,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-15 23:30:55,483 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:30:55,484 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] [2019-11-15 23:30:55,486 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:30:55,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:30:55,491 INFO L82 PathProgramCache]: Analyzing trace with hash 226651140, now seen corresponding path program 1 times [2019-11-15 23:30:55,501 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:30:55,502 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064224637] [2019-11-15 23:30:55,502 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:30:55,502 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:30:55,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:30:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:30:55,641 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 23:30:55,641 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064224637] [2019-11-15 23:30:55,643 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:30:55,643 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-15 23:30:55,644 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80598376] [2019-11-15 23:30:55,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-15 23:30:55,649 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:30:55,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-15 23:30:55,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 23:30:55,664 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 2 states. [2019-11-15 23:30:55,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:30:55,691 INFO L93 Difference]: Finished difference Result 83 states and 126 transitions. [2019-11-15 23:30:55,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-15 23:30:55,692 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 27 [2019-11-15 23:30:55,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:30:55,702 INFO L225 Difference]: With dead ends: 83 [2019-11-15 23:30:55,702 INFO L226 Difference]: Without dead ends: 39 [2019-11-15 23:30:55,705 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 23:30:55,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-15 23:30:55,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-15 23:30:55,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-15 23:30:55,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2019-11-15 23:30:55,747 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27 [2019-11-15 23:30:55,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:30:55,748 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2019-11-15 23:30:55,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-15 23:30:55,748 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2019-11-15 23:30:55,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-15 23:30:55,750 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:30:55,750 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] [2019-11-15 23:30:55,751 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:30:55,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:30:55,751 INFO L82 PathProgramCache]: Analyzing trace with hash -833651044, now seen corresponding path program 1 times [2019-11-15 23:30:55,752 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:30:55,752 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026619078] [2019-11-15 23:30:55,752 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:30:55,752 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:30:55,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:30:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:30:55,851 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 23:30:55,852 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026619078] [2019-11-15 23:30:55,852 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:30:55,852 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-15 23:30:55,852 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628989819] [2019-11-15 23:30:55,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 23:30:55,854 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:30:55,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 23:30:55,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-15 23:30:55,854 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 4 states. [2019-11-15 23:30:55,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:30:55,955 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2019-11-15 23:30:55,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 23:30:55,956 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-11-15 23:30:55,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:30:55,958 INFO L225 Difference]: With dead ends: 62 [2019-11-15 23:30:55,958 INFO L226 Difference]: Without dead ends: 58 [2019-11-15 23:30:55,959 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:30:55,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-15 23:30:55,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-11-15 23:30:55,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-15 23:30:55,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 77 transitions. [2019-11-15 23:30:55,969 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 77 transitions. Word has length 27 [2019-11-15 23:30:55,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:30:55,969 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 77 transitions. [2019-11-15 23:30:55,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 23:30:55,970 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 77 transitions. [2019-11-15 23:30:55,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-15 23:30:55,971 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:30:55,971 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, 1] [2019-11-15 23:30:55,971 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:30:55,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:30:55,972 INFO L82 PathProgramCache]: Analyzing trace with hash -829891778, now seen corresponding path program 1 times [2019-11-15 23:30:55,972 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:30:55,972 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470720384] [2019-11-15 23:30:55,972 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:30:55,972 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:30:55,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:30:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:30:56,016 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 23:30:56,016 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470720384] [2019-11-15 23:30:56,016 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:30:56,016 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 23:30:56,016 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493963699] [2019-11-15 23:30:56,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 23:30:56,017 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:30:56,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 23:30:56,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 23:30:56,018 INFO L87 Difference]: Start difference. First operand 58 states and 77 transitions. Second operand 3 states. [2019-11-15 23:30:56,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:30:56,070 INFO L93 Difference]: Finished difference Result 113 states and 151 transitions. [2019-11-15 23:30:56,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 23:30:56,071 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2019-11-15 23:30:56,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:30:56,072 INFO L225 Difference]: With dead ends: 113 [2019-11-15 23:30:56,072 INFO L226 Difference]: Without dead ends: 60 [2019-11-15 23:30:56,073 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 23:30:56,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-15 23:30:56,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2019-11-15 23:30:56,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-15 23:30:56,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 78 transitions. [2019-11-15 23:30:56,081 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 78 transitions. Word has length 29 [2019-11-15 23:30:56,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:30:56,082 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 78 transitions. [2019-11-15 23:30:56,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 23:30:56,082 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 78 transitions. [2019-11-15 23:30:56,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-15 23:30:56,083 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:30:56,083 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, 1, 1, 1] [2019-11-15 23:30:56,084 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:30:56,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:30:56,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1139067424, now seen corresponding path program 1 times [2019-11-15 23:30:56,084 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:30:56,085 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927015131] [2019-11-15 23:30:56,085 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:30:56,085 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:30:56,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:30:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:30:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 23:30:56,154 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927015131] [2019-11-15 23:30:56,154 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:30:56,154 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-15 23:30:56,154 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539682623] [2019-11-15 23:30:56,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 23:30:56,155 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:30:56,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 23:30:56,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 23:30:56,155 INFO L87 Difference]: Start difference. First operand 59 states and 78 transitions. Second operand 4 states. [2019-11-15 23:30:56,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:30:56,434 INFO L93 Difference]: Finished difference Result 108 states and 144 transitions. [2019-11-15 23:30:56,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 23:30:56,435 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2019-11-15 23:30:56,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:30:56,436 INFO L225 Difference]: With dead ends: 108 [2019-11-15 23:30:56,436 INFO L226 Difference]: Without dead ends: 60 [2019-11-15 23:30:56,436 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 23:30:56,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-15 23:30:56,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2019-11-15 23:30:56,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-15 23:30:56,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2019-11-15 23:30:56,443 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 31 [2019-11-15 23:30:56,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:30:56,444 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2019-11-15 23:30:56,444 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 23:30:56,444 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2019-11-15 23:30:56,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-15 23:30:56,445 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:30:56,446 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:30:56,446 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:30:56,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:30:56,446 INFO L82 PathProgramCache]: Analyzing trace with hash -509099182, now seen corresponding path program 1 times [2019-11-15 23:30:56,447 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:30:56,447 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506844224] [2019-11-15 23:30:56,447 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:30:56,447 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:30:56,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:30:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:30:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-15 23:30:56,515 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506844224] [2019-11-15 23:30:56,515 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276803008] [2019-11-15 23:30:56,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/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 23:30:56,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:30:56,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 23:30:56,592 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:30:56,640 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-15 23:30:56,640 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:30:56,640 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-15 23:30:56,641 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560226842] [2019-11-15 23:30:56,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 23:30:56,642 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:30:56,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 23:30:56,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-15 23:30:56,642 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 6 states. [2019-11-15 23:30:56,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:30:56,741 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2019-11-15 23:30:56,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 23:30:56,741 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2019-11-15 23:30:56,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:30:56,742 INFO L225 Difference]: With dead ends: 97 [2019-11-15 23:30:56,742 INFO L226 Difference]: Without dead ends: 53 [2019-11-15 23:30:56,743 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 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 23:30:56,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-15 23:30:56,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-11-15 23:30:56,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-15 23:30:56,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2019-11-15 23:30:56,748 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2019-11-15 23:30:56,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:30:56,751 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2019-11-15 23:30:56,751 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 23:30:56,751 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2019-11-15 23:30:56,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-15 23:30:56,756 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:30:56,756 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:30:56,959 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:30:56,959 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:30:56,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:30:56,960 INFO L82 PathProgramCache]: Analyzing trace with hash 290748660, now seen corresponding path program 2 times [2019-11-15 23:30:56,960 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:30:56,960 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260495588] [2019-11-15 23:30:56,960 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:30:56,960 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:30:56,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:30:56,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:30:57,040 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-15 23:30:57,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260495588] [2019-11-15 23:30:57,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547700967] [2019-11-15 23:30:57,041 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/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 23:30:57,102 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 23:30:57,103 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:30:57,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 23:30:57,106 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:30:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-15 23:30:57,147 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:30:57,147 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2019-11-15 23:30:57,147 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581111321] [2019-11-15 23:30:57,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 23:30:57,148 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:30:57,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 23:30:57,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-11-15 23:30:57,149 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 7 states. [2019-11-15 23:30:57,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:30:57,377 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2019-11-15 23:30:57,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 23:30:57,377 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2019-11-15 23:30:57,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:30:57,379 INFO L225 Difference]: With dead ends: 122 [2019-11-15 23:30:57,379 INFO L226 Difference]: Without dead ends: 82 [2019-11-15 23:30:57,379 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-11-15 23:30:57,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-15 23:30:57,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2019-11-15 23:30:57,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-15 23:30:57,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2019-11-15 23:30:57,387 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 51 [2019-11-15 23:30:57,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:30:57,387 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2019-11-15 23:30:57,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 23:30:57,388 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2019-11-15 23:30:57,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-15 23:30:57,397 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:30:57,398 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:30:57,601 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:30:57,601 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:30:57,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:30:57,601 INFO L82 PathProgramCache]: Analyzing trace with hash -813057144, now seen corresponding path program 3 times [2019-11-15 23:30:57,601 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:30:57,602 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130309287] [2019-11-15 23:30:57,602 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:30:57,602 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:30:57,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:30:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:31:00,201 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:31:00,202 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130309287] [2019-11-15 23:31:00,202 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897357932] [2019-11-15 23:31:00,202 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/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 23:31:00,277 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-15 23:31:00,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:31:00,281 WARN L254 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 105 conjunts are in the unsatisfiable core [2019-11-15 23:31:00,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:31:17,372 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:31:17,372 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2019-11-15 23:31:17,373 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-15 23:31:17,386 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:31:17,386 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 23:31:17,390 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 23:31:17,391 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:31 [2019-11-15 23:31:17,561 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 23:31:17,711 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 23:31:17,746 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 23:31:17,893 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:31:17,893 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:31:17,893 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 59] total 94 [2019-11-15 23:31:17,894 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157328653] [2019-11-15 23:31:17,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-11-15 23:31:17,895 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:31:17,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-11-15 23:31:17,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=8399, Unknown=0, NotChecked=0, Total=8742 [2019-11-15 23:31:17,899 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand 94 states. [2019-11-15 23:33:24,463 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-11-15 23:33:24,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-15 23:33:24,664 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:33:24,665 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:153) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.checkSat(ManagedScript.java:140) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:84) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:899) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1066) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:968) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:188) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:668) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:597) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:454) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 44 more [2019-11-15 23:33:24,669 INFO L168 Benchmark]: Toolchain (without parser) took 150105.18 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 259.5 MB). Free memory was 946.1 MB in the beginning and 1.0 GB in the end (delta: -88.8 MB). Peak memory consumption was 170.7 MB. Max. memory is 11.5 GB. [2019-11-15 23:33:24,669 INFO L168 Benchmark]: CDTParser took 0.18 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 23:33:24,670 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.36 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.9 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -198.7 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-15 23:33:24,670 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.60 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-15 23:33:24,671 INFO L168 Benchmark]: Boogie Preprocessor took 30.04 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 23:33:24,671 INFO L168 Benchmark]: RCFGBuilder took 454.78 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: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 11.5 GB. [2019-11-15 23:33:24,672 INFO L168 Benchmark]: TraceAbstraction took 149282.88 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 109.6 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 75.4 MB). Peak memory consumption was 185.0 MB. Max. memory is 11.5 GB. [2019-11-15 23:33:24,675 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 293.36 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.9 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -198.7 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 40.60 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 30.04 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 454.78 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: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 149282.88 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 109.6 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 75.4 MB). Peak memory consumption was 185.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-11-15 23:33:26,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 23:33:26,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 23:33:26,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 23:33:26,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 23:33:26,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 23:33:26,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 23:33:26,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 23:33:26,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 23:33:26,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 23:33:26,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 23:33:26,671 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 23:33:26,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 23:33:26,672 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 23:33:26,673 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 23:33:26,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 23:33:26,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 23:33:26,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 23:33:26,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 23:33:26,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 23:33:26,682 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 23:33:26,683 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 23:33:26,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 23:33:26,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 23:33:26,688 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 23:33:26,688 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 23:33:26,688 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 23:33:26,689 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 23:33:26,690 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 23:33:26,691 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 23:33:26,691 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 23:33:26,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 23:33:26,693 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 23:33:26,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 23:33:26,700 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 23:33:26,700 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 23:33:26,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 23:33:26,701 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 23:33:26,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 23:33:26,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 23:33:26,702 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 23:33:26,703 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-11-15 23:33:26,717 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 23:33:26,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 23:33:26,718 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 23:33:26,718 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 23:33:26,719 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 23:33:26,719 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 23:33:26,719 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 23:33:26,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 23:33:26,720 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 23:33:26,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 23:33:26,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 23:33:26,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 23:33:26,721 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-15 23:33:26,721 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-15 23:33:26,721 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 23:33:26,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 23:33:26,721 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 23:33:26,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 23:33:26,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 23:33:26,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 23:33:26,722 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 23:33:26,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 23:33:26,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 23:33:26,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 23:33:26,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 23:33:26,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 23:33:26,724 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-15 23:33:26,724 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-15 23:33:26,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 23:33:26,724 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-15 23:33:26,725 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/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 -> 360f2044aa56b2f54e5bb369a0e89d5e20d519de [2019-11-15 23:33:26,760 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 23:33:26,770 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 23:33:26,773 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 23:33:26,774 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 23:33:26,775 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 23:33:26,776 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/bin/uautomizer/../../sv-benchmarks/c/array-crafted/zero_sum_m5.c [2019-11-15 23:33:26,836 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/bin/uautomizer/data/7c3621eba/7bebcf106407497998f3a48920a1347c/FLAG5dca53431 [2019-11-15 23:33:27,310 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 23:33:27,313 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/sv-benchmarks/c/array-crafted/zero_sum_m5.c [2019-11-15 23:33:27,319 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/bin/uautomizer/data/7c3621eba/7bebcf106407497998f3a48920a1347c/FLAG5dca53431 [2019-11-15 23:33:27,713 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/bin/uautomizer/data/7c3621eba/7bebcf106407497998f3a48920a1347c [2019-11-15 23:33:27,717 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 23:33:27,719 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 23:33:27,720 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 23:33:27,720 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 23:33:27,723 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 23:33:27,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:33:27" (1/1) ... [2019-11-15 23:33:27,726 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6451828e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:33:27, skipping insertion in model container [2019-11-15 23:33:27,727 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:33:27" (1/1) ... [2019-11-15 23:33:27,733 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 23:33:27,754 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 23:33:27,906 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:33:27,911 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 23:33:27,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:33:28,020 INFO L192 MainTranslator]: Completed translation [2019-11-15 23:33:28,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:33:28 WrapperNode [2019-11-15 23:33:28,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 23:33:28,022 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 23:33:28,022 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 23:33:28,023 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 23:33:28,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:33:28" (1/1) ... [2019-11-15 23:33:28,037 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:33:28" (1/1) ... [2019-11-15 23:33:28,062 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 23:33:28,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 23:33:28,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 23:33:28,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 23:33:28,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:33:28" (1/1) ... [2019-11-15 23:33:28,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:33:28" (1/1) ... [2019-11-15 23:33:28,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:33:28" (1/1) ... [2019-11-15 23:33:28,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:33:28" (1/1) ... [2019-11-15 23:33:28,082 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:33:28" (1/1) ... [2019-11-15 23:33:28,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:33:28" (1/1) ... [2019-11-15 23:33:28,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:33:28" (1/1) ... [2019-11-15 23:33:28,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 23:33:28,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 23:33:28,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 23:33:28,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 23:33:28,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:33:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/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 23:33:28,151 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2019-11-15 23:33:28,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 23:33:28,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 23:33:28,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2019-11-15 23:33:28,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-15 23:33:28,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-15 23:33:28,544 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 23:33:28,544 INFO L284 CfgBuilder]: Removed 17 assume(true) statements. [2019-11-15 23:33:28,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:33:28 BoogieIcfgContainer [2019-11-15 23:33:28,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 23:33:28,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 23:33:28,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 23:33:28,549 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 23:33:28,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 11:33:27" (1/3) ... [2019-11-15 23:33:28,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eff299b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:33:28, skipping insertion in model container [2019-11-15 23:33:28,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:33:28" (2/3) ... [2019-11-15 23:33:28,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eff299b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:33:28, skipping insertion in model container [2019-11-15 23:33:28,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:33:28" (3/3) ... [2019-11-15 23:33:28,552 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_m5.c [2019-11-15 23:33:28,561 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 23:33:28,568 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 23:33:28,578 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 23:33:28,600 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 23:33:28,600 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 23:33:28,600 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 23:33:28,601 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 23:33:28,601 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 23:33:28,601 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 23:33:28,601 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 23:33:28,601 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 23:33:28,615 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2019-11-15 23:33:28,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-15 23:33:28,622 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:33:28,622 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] [2019-11-15 23:33:28,624 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:33:28,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:33:28,629 INFO L82 PathProgramCache]: Analyzing trace with hash 226651140, now seen corresponding path program 1 times [2019-11-15 23:33:28,636 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:33:28,636 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1048272331] [2019-11-15 23:33:28,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:33:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:33:28,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-15 23:33:28,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:33:28,741 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 23:33:28,741 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:33:28,749 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 23:33:28,750 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1048272331] [2019-11-15 23:33:28,751 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:33:28,751 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-15 23:33:28,752 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014381989] [2019-11-15 23:33:28,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-15 23:33:28,756 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:33:28,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-15 23:33:28,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 23:33:28,771 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 2 states. [2019-11-15 23:33:28,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:33:28,790 INFO L93 Difference]: Finished difference Result 83 states and 126 transitions. [2019-11-15 23:33:28,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-15 23:33:28,791 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 27 [2019-11-15 23:33:28,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:33:28,800 INFO L225 Difference]: With dead ends: 83 [2019-11-15 23:33:28,801 INFO L226 Difference]: Without dead ends: 39 [2019-11-15 23:33:28,804 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 52 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 23:33:28,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-15 23:33:28,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-15 23:33:28,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-15 23:33:28,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2019-11-15 23:33:28,839 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27 [2019-11-15 23:33:28,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:33:28,840 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2019-11-15 23:33:28,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-15 23:33:28,840 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2019-11-15 23:33:28,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-15 23:33:28,841 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:33:28,842 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] [2019-11-15 23:33:29,043 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:33:29,044 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:33:29,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:33:29,044 INFO L82 PathProgramCache]: Analyzing trace with hash -833651044, now seen corresponding path program 1 times [2019-11-15 23:33:29,045 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:33:29,045 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [787856845] [2019-11-15 23:33:29,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:33:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:33:29,104 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 23:33:29,106 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:33:29,147 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 23:33:29,147 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:33:29,178 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 23:33:29,178 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [787856845] [2019-11-15 23:33:29,179 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:33:29,179 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2019-11-15 23:33:29,179 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085727540] [2019-11-15 23:33:29,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 23:33:29,181 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:33:29,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 23:33:29,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:33:29,183 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 5 states. [2019-11-15 23:33:29,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:33:29,324 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2019-11-15 23:33:29,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 23:33:29,325 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-11-15 23:33:29,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:33:29,326 INFO L225 Difference]: With dead ends: 62 [2019-11-15 23:33:29,327 INFO L226 Difference]: Without dead ends: 58 [2019-11-15 23:33:29,328 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-15 23:33:29,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-15 23:33:29,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-11-15 23:33:29,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-15 23:33:29,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 77 transitions. [2019-11-15 23:33:29,338 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 77 transitions. Word has length 27 [2019-11-15 23:33:29,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:33:29,339 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 77 transitions. [2019-11-15 23:33:29,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 23:33:29,339 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 77 transitions. [2019-11-15 23:33:29,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-15 23:33:29,341 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:33:29,341 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, 1] [2019-11-15 23:33:29,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:33:29,544 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:33:29,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:33:29,544 INFO L82 PathProgramCache]: Analyzing trace with hash -829891778, now seen corresponding path program 1 times [2019-11-15 23:33:29,554 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:33:29,555 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1240201917] [2019-11-15 23:33:29,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:33:29,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:33:29,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 23:33:29,642 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:33:29,664 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 23:33:29,664 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:33:29,685 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 23:33:29,685 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1240201917] [2019-11-15 23:33:29,685 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:33:29,686 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-15 23:33:29,686 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21950080] [2019-11-15 23:33:29,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 23:33:29,687 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:33:29,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 23:33:29,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 23:33:29,687 INFO L87 Difference]: Start difference. First operand 58 states and 77 transitions. Second operand 4 states. [2019-11-15 23:33:29,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:33:29,813 INFO L93 Difference]: Finished difference Result 114 states and 153 transitions. [2019-11-15 23:33:29,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 23:33:29,814 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2019-11-15 23:33:29,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:33:29,815 INFO L225 Difference]: With dead ends: 114 [2019-11-15 23:33:29,816 INFO L226 Difference]: Without dead ends: 61 [2019-11-15 23:33:29,816 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 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 23:33:29,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-15 23:33:29,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-11-15 23:33:29,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-15 23:33:29,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2019-11-15 23:33:29,833 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 29 [2019-11-15 23:33:29,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:33:29,834 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2019-11-15 23:33:29,834 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 23:33:29,834 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2019-11-15 23:33:29,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-15 23:33:29,836 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:33:29,837 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:33:30,041 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:33:30,041 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:33:30,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:33:30,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1904119806, now seen corresponding path program 1 times [2019-11-15 23:33:30,042 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:33:30,042 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1000609737] [2019-11-15 23:33:30,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:33:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:33:30,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-15 23:33:30,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:33:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 23:33:30,227 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:33:30,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 23:33:30,402 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1000609737] [2019-11-15 23:33:30,402 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:33:30,402 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-11-15 23:33:30,403 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3291904] [2019-11-15 23:33:30,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-15 23:33:30,403 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:33:30,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-15 23:33:30,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-11-15 23:33:30,404 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand 12 states. [2019-11-15 23:33:31,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:33:31,278 INFO L93 Difference]: Finished difference Result 168 states and 234 transitions. [2019-11-15 23:33:31,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-15 23:33:31,279 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2019-11-15 23:33:31,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:33:31,281 INFO L225 Difference]: With dead ends: 168 [2019-11-15 23:33:31,281 INFO L226 Difference]: Without dead ends: 119 [2019-11-15 23:33:31,282 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2019-11-15 23:33:31,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-11-15 23:33:31,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2019-11-15 23:33:31,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-11-15 23:33:31,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2019-11-15 23:33:31,316 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 33 [2019-11-15 23:33:31,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:33:31,316 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2019-11-15 23:33:31,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-15 23:33:31,317 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2019-11-15 23:33:31,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-15 23:33:31,321 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:33:31,322 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:33:31,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:33:31,533 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:33:31,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:33:31,533 INFO L82 PathProgramCache]: Analyzing trace with hash 145378838, now seen corresponding path program 1 times [2019-11-15 23:33:31,534 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:33:31,534 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [989955627] [2019-11-15 23:33:31,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:33:31,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:33:31,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-15 23:33:31,742 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:33:31,884 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-15 23:33:31,888 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:33:32,140 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-15 23:33:32,141 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [989955627] [2019-11-15 23:33:32,141 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:33:32,141 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-11-15 23:33:32,141 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574583210] [2019-11-15 23:33:32,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-15 23:33:32,142 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:33:32,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-15 23:33:32,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-11-15 23:33:32,143 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand 16 states. [2019-11-15 23:33:33,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:33:33,910 INFO L93 Difference]: Finished difference Result 265 states and 323 transitions. [2019-11-15 23:33:33,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-15 23:33:33,911 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2019-11-15 23:33:33,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:33:33,913 INFO L225 Difference]: With dead ends: 265 [2019-11-15 23:33:33,913 INFO L226 Difference]: Without dead ends: 225 [2019-11-15 23:33:33,914 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2019-11-15 23:33:33,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2019-11-15 23:33:33,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 72. [2019-11-15 23:33:33,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-15 23:33:33,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2019-11-15 23:33:33,930 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 53 [2019-11-15 23:33:33,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:33:33,930 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2019-11-15 23:33:33,930 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-15 23:33:33,930 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2019-11-15 23:33:33,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-15 23:33:33,932 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:33:33,933 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:33:34,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:33:34,136 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:33:34,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:33:34,137 INFO L82 PathProgramCache]: Analyzing trace with hash -813057144, now seen corresponding path program 2 times [2019-11-15 23:33:34,137 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:33:34,138 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1448798825] [2019-11-15 23:33:34,138 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:35:07,017 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 23:35:07,017 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:35:07,020 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 48 conjunts are in the unsatisfiable core [2019-11-15 23:35:07,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:35:07,084 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-11-15 23:35:07,085 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 23:35:07,100 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:35:07,101 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 23:35:07,101 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2019-11-15 23:35:15,465 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:35:15,465 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 30 [2019-11-15 23:35:15,466 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 23:35:15,469 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:35:15,469 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-15 23:35:15,470 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:27 [2019-11-15 23:35:15,760 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 23:35:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:35:16,095 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:35:37,389 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2019-11-15 23:35:59,507 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-15 23:35:59,507 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1448798825] [2019-11-15 23:35:59,507 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:35:59,508 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39] total 75 [2019-11-15 23:35:59,508 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475421405] [2019-11-15 23:35:59,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 75 states [2019-11-15 23:35:59,509 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:35:59,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2019-11-15 23:35:59,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=5336, Unknown=5, NotChecked=0, Total=5550 [2019-11-15 23:35:59,513 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand 75 states. [2019-11-15 23:36:16,579 WARN L191 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2019-11-15 23:36:25,592 WARN L191 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2019-11-15 23:36:27,924 WARN L191 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2019-11-15 23:36:37,377 WARN L191 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2019-11-15 23:36:41,373 WARN L191 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2019-11-15 23:37:05,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:37:05,789 INFO L93 Difference]: Finished difference Result 133 states and 152 transitions. [2019-11-15 23:37:05,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-15 23:37:05,789 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 71 [2019-11-15 23:37:05,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:37:05,790 INFO L225 Difference]: With dead ends: 133 [2019-11-15 23:37:05,790 INFO L226 Difference]: Without dead ends: 129 [2019-11-15 23:37:05,794 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 58 SyntacticMatches, 9 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 64.5s TimeCoverageRelationStatistics Valid=245, Invalid=6392, Unknown=5, NotChecked=0, Total=6642 [2019-11-15 23:37:05,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-11-15 23:37:05,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2019-11-15 23:37:05,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-11-15 23:37:05,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2019-11-15 23:37:05,821 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 71 [2019-11-15 23:37:05,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:37:05,822 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2019-11-15 23:37:05,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 75 states. [2019-11-15 23:37:05,822 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2019-11-15 23:37:05,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-15 23:37:05,832 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:37:05,832 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:37:06,041 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:37:06,041 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:37:06,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:37:06,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1767165226, now seen corresponding path program 3 times [2019-11-15 23:37:06,042 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:37:06,042 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [778610327] [2019-11-15 23:37:06,042 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/bin/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:37:06,378 ERROR L273 tionRefinementEngine]: Caught known exception: Array theory solver does not yet support write-chains connecting two different constant arrays [2019-11-15 23:37:06,379 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111239530] [2019-11-15 23:37:06,379 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93435d50-85f6-4b30-b29f-a4097f93014e/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 23:37:06,586 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-15 23:37:06,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:37:06,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-15 23:37:06,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:37:06,711 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-15 23:37:06,712 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:37:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-15 23:37:07,007 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [778610327] [2019-11-15 23:37:07,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:37:07,208 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: Do not try to interpolate when trace is feasible at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:328) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-15 23:37:07,214 INFO L168 Benchmark]: Toolchain (without parser) took 219495.02 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 245.4 MB). Free memory was 948.3 MB in the beginning and 1.2 GB in the end (delta: -203.8 MB). Peak memory consumption was 41.6 MB. Max. memory is 11.5 GB. [2019-11-15 23:37:07,217 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 972.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:37:07,218 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.4 MB). Free memory was 948.3 MB in the beginning and 1.1 GB in the end (delta: -200.3 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. [2019-11-15 23:37:07,219 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.05 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 23:37:07,219 INFO L168 Benchmark]: Boogie Preprocessor took 31.26 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 23:37:07,220 INFO L168 Benchmark]: RCFGBuilder took 451.53 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: 31.2 MB). Peak memory consumption was 31.2 MB. Max. memory is 11.5 GB. [2019-11-15 23:37:07,226 INFO L168 Benchmark]: TraceAbstraction took 218666.02 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 86.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -34.6 MB). Peak memory consumption was 51.3 MB. Max. memory is 11.5 GB. [2019-11-15 23:37:07,229 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 972.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 302.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.4 MB). Free memory was 948.3 MB in the beginning and 1.1 GB in the end (delta: -200.3 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 40.05 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 31.26 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 451.53 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: 31.2 MB). Peak memory consumption was 31.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 218666.02 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 86.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -34.6 MB). Peak memory consumption was 51.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: Do not try to interpolate when trace is feasible de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: Do not try to interpolate when trace is feasible : de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:328) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...