./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2c_remove_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/sll2c_remove_all.i -s /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/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 082b1bde50b1883aaa9112842176e8bb0db36577 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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_de802a19-fd16-493b-9ef5-e1eaec9ee965/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/sll2c_remove_all.i -s /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/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 082b1bde50b1883aaa9112842176e8bb0db36577 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: UnsupportedOperationException: expected NNF --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-16 00:26:40,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-16 00:26:40,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-16 00:26:40,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-16 00:26:40,550 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-16 00:26:40,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-16 00:26:40,552 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-16 00:26:40,554 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-16 00:26:40,556 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-16 00:26:40,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-16 00:26:40,557 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-16 00:26:40,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-16 00:26:40,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-16 00:26:40,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-16 00:26:40,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-16 00:26:40,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-16 00:26:40,562 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-16 00:26:40,563 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-16 00:26:40,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-16 00:26:40,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-16 00:26:40,570 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-16 00:26:40,573 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-16 00:26:40,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-16 00:26:40,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-16 00:26:40,579 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-16 00:26:40,580 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-16 00:26:40,580 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-16 00:26:40,581 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-16 00:26:40,582 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-16 00:26:40,583 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-16 00:26:40,584 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-16 00:26:40,585 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-16 00:26:40,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-16 00:26:40,586 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-16 00:26:40,587 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-16 00:26:40,588 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-16 00:26:40,588 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-16 00:26:40,589 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-16 00:26:40,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-16 00:26:40,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-16 00:26:40,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-16 00:26:40,592 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-16 00:26:40,609 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-16 00:26:40,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-16 00:26:40,611 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-16 00:26:40,611 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-16 00:26:40,611 INFO L138 SettingsManager]: * Use SBE=true [2019-11-16 00:26:40,612 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-16 00:26:40,612 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-16 00:26:40,612 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-16 00:26:40,612 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-16 00:26:40,613 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-16 00:26:40,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-16 00:26:40,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-16 00:26:40,614 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-16 00:26:40,614 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-16 00:26:40,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-16 00:26:40,615 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-16 00:26:40,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-16 00:26:40,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-16 00:26:40,616 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-16 00:26:40,616 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-16 00:26:40,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-16 00:26:40,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-16 00:26:40,617 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-16 00:26:40,617 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-16 00:26:40,617 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-16 00:26:40,617 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-16 00:26:40,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-16 00:26:40,618 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-16 00:26:40,618 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_de802a19-fd16-493b-9ef5-e1eaec9ee965/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 -> 082b1bde50b1883aaa9112842176e8bb0db36577 [2019-11-16 00:26:40,665 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-16 00:26:40,678 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-16 00:26:40,681 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-16 00:26:40,684 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-16 00:26:40,684 INFO L275 PluginConnector]: CDTParser initialized [2019-11-16 00:26:40,685 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/bin/uautomizer/../../sv-benchmarks/c/list-simple/sll2c_remove_all.i [2019-11-16 00:26:40,736 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/bin/uautomizer/data/9548d69c2/88843e0a2aa346a78e61147cd36d84d2/FLAG4d6bad492 [2019-11-16 00:26:41,179 INFO L306 CDTParser]: Found 1 translation units. [2019-11-16 00:26:41,180 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/sv-benchmarks/c/list-simple/sll2c_remove_all.i [2019-11-16 00:26:41,193 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/bin/uautomizer/data/9548d69c2/88843e0a2aa346a78e61147cd36d84d2/FLAG4d6bad492 [2019-11-16 00:26:41,505 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/bin/uautomizer/data/9548d69c2/88843e0a2aa346a78e61147cd36d84d2 [2019-11-16 00:26:41,507 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-16 00:26:41,508 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-16 00:26:41,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-16 00:26:41,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-16 00:26:41,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-16 00:26:41,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:26:41" (1/1) ... [2019-11-16 00:26:41,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f773146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:41, skipping insertion in model container [2019-11-16 00:26:41,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:26:41" (1/1) ... [2019-11-16 00:26:41,518 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-16 00:26:41,557 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-16 00:26:42,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:26:42,009 INFO L188 MainTranslator]: Completed pre-run [2019-11-16 00:26:42,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:26:42,132 INFO L192 MainTranslator]: Completed translation [2019-11-16 00:26:42,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:42 WrapperNode [2019-11-16 00:26:42,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-16 00:26:42,134 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-16 00:26:42,134 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-16 00:26:42,134 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-16 00:26:42,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:42" (1/1) ... [2019-11-16 00:26:42,156 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:42" (1/1) ... [2019-11-16 00:26:42,180 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-16 00:26:42,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-16 00:26:42,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-16 00:26:42,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-16 00:26:42,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:42" (1/1) ... [2019-11-16 00:26:42,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:42" (1/1) ... [2019-11-16 00:26:42,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:42" (1/1) ... [2019-11-16 00:26:42,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:42" (1/1) ... [2019-11-16 00:26:42,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:42" (1/1) ... [2019-11-16 00:26:42,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:42" (1/1) ... [2019-11-16 00:26:42,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:42" (1/1) ... [2019-11-16 00:26:42,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-16 00:26:42,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-16 00:26:42,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-16 00:26:42,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-16 00:26:42,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/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 [2019-11-16 00:26:42,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-16 00:26:42,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-16 00:26:42,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-16 00:26:42,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-16 00:26:42,302 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-16 00:26:42,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-16 00:26:42,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-16 00:26:42,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-16 00:26:42,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-16 00:26:42,679 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-16 00:26:42,679 INFO L284 CfgBuilder]: Removed 19 assume(true) statements. [2019-11-16 00:26:42,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:26:42 BoogieIcfgContainer [2019-11-16 00:26:42,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-16 00:26:42,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-16 00:26:42,682 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-16 00:26:42,684 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-16 00:26:42,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:26:41" (1/3) ... [2019-11-16 00:26:42,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d520a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:26:42, skipping insertion in model container [2019-11-16 00:26:42,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:42" (2/3) ... [2019-11-16 00:26:42,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d520a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:26:42, skipping insertion in model container [2019-11-16 00:26:42,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:26:42" (3/3) ... [2019-11-16 00:26:42,688 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2c_remove_all.i [2019-11-16 00:26:42,696 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-16 00:26:42,703 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-16 00:26:42,713 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-16 00:26:42,732 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-16 00:26:42,733 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-16 00:26:42,733 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-16 00:26:42,733 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-16 00:26:42,733 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-16 00:26:42,733 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-16 00:26:42,733 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-16 00:26:42,733 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-16 00:26:42,743 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-11-16 00:26:42,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-16 00:26:42,749 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:26:42,749 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:26:42,751 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:26:42,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:26:42,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1935900066, now seen corresponding path program 1 times [2019-11-16 00:26:42,760 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:26:42,760 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946268331] [2019-11-16 00:26:42,760 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:26:42,761 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:26:42,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:26:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:42,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:26:42,873 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946268331] [2019-11-16 00:26:42,874 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:26:42,874 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-16 00:26:42,874 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100754460] [2019-11-16 00:26:42,877 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-16 00:26:42,877 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:26:42,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-16 00:26:42,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-16 00:26:42,889 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2019-11-16 00:26:42,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:26:42,903 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2019-11-16 00:26:42,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-16 00:26:42,905 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-11-16 00:26:42,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:26:42,912 INFO L225 Difference]: With dead ends: 41 [2019-11-16 00:26:42,912 INFO L226 Difference]: Without dead ends: 21 [2019-11-16 00:26:42,914 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 [2019-11-16 00:26:42,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-16 00:26:42,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-16 00:26:42,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-16 00:26:42,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-11-16 00:26:42,941 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 12 [2019-11-16 00:26:42,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:26:42,946 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-11-16 00:26:42,946 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-16 00:26:42,946 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-11-16 00:26:42,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-16 00:26:42,947 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:26:42,947 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:26:42,947 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:26:42,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:26:42,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1899961651, now seen corresponding path program 1 times [2019-11-16 00:26:42,948 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:26:42,948 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448882618] [2019-11-16 00:26:42,948 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:26:42,949 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:26:42,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:26:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:43,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:26:43,013 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448882618] [2019-11-16 00:26:43,013 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:26:43,013 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-16 00:26:43,013 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740168441] [2019-11-16 00:26:43,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-16 00:26:43,015 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:26:43,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-16 00:26:43,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-16 00:26:43,016 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 3 states. [2019-11-16 00:26:43,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:26:43,038 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2019-11-16 00:26:43,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-16 00:26:43,038 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-16 00:26:43,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:26:43,039 INFO L225 Difference]: With dead ends: 37 [2019-11-16 00:26:43,039 INFO L226 Difference]: Without dead ends: 25 [2019-11-16 00:26:43,040 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 [2019-11-16 00:26:43,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-16 00:26:43,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2019-11-16 00:26:43,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-16 00:26:43,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-11-16 00:26:43,044 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 12 [2019-11-16 00:26:43,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:26:43,044 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-11-16 00:26:43,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-16 00:26:43,044 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-11-16 00:26:43,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-16 00:26:43,045 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:26:43,045 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:26:43,045 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:26:43,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:26:43,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1177950341, now seen corresponding path program 1 times [2019-11-16 00:26:43,046 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:26:43,046 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835219027] [2019-11-16 00:26:43,046 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:26:43,046 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:26:43,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:26:43,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:43,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:26:43,152 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835219027] [2019-11-16 00:26:43,152 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657316956] [2019-11-16 00:26:43,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/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 [2019-11-16 00:26:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:43,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-16 00:26:43,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:26:43,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:26:43,290 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-16 00:26:43,290 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2019-11-16 00:26:43,290 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883094758] [2019-11-16 00:26:43,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-16 00:26:43,296 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:26:43,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-16 00:26:43,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-16 00:26:43,297 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 4 states. [2019-11-16 00:26:43,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:26:43,322 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2019-11-16 00:26:43,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-16 00:26:43,325 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-11-16 00:26:43,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:26:43,325 INFO L225 Difference]: With dead ends: 32 [2019-11-16 00:26:43,325 INFO L226 Difference]: Without dead ends: 28 [2019-11-16 00:26:43,326 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-16 00:26:43,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-16 00:26:43,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2019-11-16 00:26:43,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-16 00:26:43,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2019-11-16 00:26:43,330 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2019-11-16 00:26:43,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:26:43,331 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2019-11-16 00:26:43,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-16 00:26:43,331 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2019-11-16 00:26:43,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-16 00:26:43,332 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:26:43,332 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:26:43,532 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:26:43,533 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:26:43,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:26:43,533 INFO L82 PathProgramCache]: Analyzing trace with hash -721407783, now seen corresponding path program 1 times [2019-11-16 00:26:43,533 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:26:43,533 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999488408] [2019-11-16 00:26:43,533 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:26:43,533 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:26:43,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:26:43,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:26:43,646 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999488408] [2019-11-16 00:26:43,646 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:26:43,646 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-16 00:26:43,646 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630987440] [2019-11-16 00:26:43,647 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-16 00:26:43,647 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:26:43,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-16 00:26:43,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-16 00:26:43,647 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 5 states. [2019-11-16 00:26:43,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:26:43,790 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2019-11-16 00:26:43,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-16 00:26:43,790 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-11-16 00:26:43,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:26:43,791 INFO L225 Difference]: With dead ends: 33 [2019-11-16 00:26:43,791 INFO L226 Difference]: Without dead ends: 29 [2019-11-16 00:26:43,792 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-16 00:26:43,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-16 00:26:43,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2019-11-16 00:26:43,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-16 00:26:43,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-11-16 00:26:43,796 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 19 [2019-11-16 00:26:43,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:26:43,796 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-11-16 00:26:43,796 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-16 00:26:43,796 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2019-11-16 00:26:43,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-16 00:26:43,797 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:26:43,797 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] [2019-11-16 00:26:43,797 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:26:43,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:26:43,797 INFO L82 PathProgramCache]: Analyzing trace with hash -505428817, now seen corresponding path program 1 times [2019-11-16 00:26:43,797 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:26:43,798 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928734609] [2019-11-16 00:26:43,798 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:26:43,798 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:26:43,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:26:43,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:44,009 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2019-11-16 00:26:44,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:26:44,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928734609] [2019-11-16 00:26:44,123 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:26:44,123 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-16 00:26:44,123 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881044244] [2019-11-16 00:26:44,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-16 00:26:44,124 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:26:44,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-16 00:26:44,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-16 00:26:44,124 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 5 states. [2019-11-16 00:26:44,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:26:44,273 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2019-11-16 00:26:44,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-16 00:26:44,273 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-11-16 00:26:44,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:26:44,274 INFO L225 Difference]: With dead ends: 38 [2019-11-16 00:26:44,274 INFO L226 Difference]: Without dead ends: 26 [2019-11-16 00:26:44,275 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-16 00:26:44,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-16 00:26:44,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-16 00:26:44,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-16 00:26:44,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-11-16 00:26:44,280 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 22 [2019-11-16 00:26:44,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:26:44,280 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-11-16 00:26:44,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-16 00:26:44,280 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-11-16 00:26:44,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-16 00:26:44,281 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:26:44,281 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:26:44,281 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:26:44,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:26:44,284 INFO L82 PathProgramCache]: Analyzing trace with hash -419596300, now seen corresponding path program 1 times [2019-11-16 00:26:44,284 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:26:44,284 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492871918] [2019-11-16 00:26:44,285 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:26:44,285 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:26:44,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:26:44,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:44,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-16 00:26:44,397 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492871918] [2019-11-16 00:26:44,397 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561082640] [2019-11-16 00:26:44,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/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 [2019-11-16 00:26:44,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:44,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-16 00:26:44,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:26:44,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-16 00:26:44,528 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:26:44,528 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-11-16 00:26:44,528 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657508347] [2019-11-16 00:26:44,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-16 00:26:44,529 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:26:44,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-16 00:26:44,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-16 00:26:44,532 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 8 states. [2019-11-16 00:26:44,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:26:44,618 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2019-11-16 00:26:44,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-16 00:26:44,626 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2019-11-16 00:26:44,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:26:44,627 INFO L225 Difference]: With dead ends: 52 [2019-11-16 00:26:44,627 INFO L226 Difference]: Without dead ends: 48 [2019-11-16 00:26:44,627 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-16 00:26:44,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-16 00:26:44,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2019-11-16 00:26:44,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-16 00:26:44,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-11-16 00:26:44,635 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 24 [2019-11-16 00:26:44,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:26:44,635 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-11-16 00:26:44,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-16 00:26:44,635 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-11-16 00:26:44,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-16 00:26:44,636 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:26:44,636 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:26:44,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:26:44,840 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:26:44,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:26:44,840 INFO L82 PathProgramCache]: Analyzing trace with hash 480509000, now seen corresponding path program 1 times [2019-11-16 00:26:44,840 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:26:44,841 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421634654] [2019-11-16 00:26:44,841 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:26:44,841 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:26:44,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:26:44,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-16 00:26:45,102 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421634654] [2019-11-16 00:26:45,102 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127836862] [2019-11-16 00:26:45,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/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 [2019-11-16 00:26:45,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:45,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 47 conjunts are in the unsatisfiable core [2019-11-16 00:26:45,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:26:45,278 INFO L341 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-16 00:26:45,279 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 11 [2019-11-16 00:26:45,279 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:26:45,286 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:26:45,287 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:26:45,287 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:14 [2019-11-16 00:26:45,386 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:26:45,387 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 34 [2019-11-16 00:26:45,388 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:26:45,396 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:26:45,397 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:26:45,397 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:15 [2019-11-16 00:26:45,467 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-16 00:26:45,467 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:26:45,477 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:26:45,477 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:26:45,478 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2019-11-16 00:26:45,549 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:26:45,549 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 46 [2019-11-16 00:26:45,550 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-16 00:26:45,551 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:26:45,553 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-16 00:26:45,582 INFO L567 ElimStorePlain]: treesize reduction 25, result has 52.8 percent of original size [2019-11-16 00:26:45,582 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. [2019-11-16 00:26:45,583 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:27 [2019-11-16 00:26:45,687 INFO L392 ElimStorePlain]: Different costs {0=[|#memory_$Pointer$.offset|], 6=[|#memory_$Pointer$.base|]} [2019-11-16 00:26:45,695 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2019-11-16 00:26:45,696 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-16 00:26:45,707 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:26:45,737 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:26:45,737 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 60 [2019-11-16 00:26:45,739 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-16 00:26:45,751 INFO L567 ElimStorePlain]: treesize reduction 24, result has 27.3 percent of original size [2019-11-16 00:26:45,752 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:26:45,752 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:74, output treesize:4 [2019-11-16 00:26:45,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-16 00:26:45,783 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:26:45,783 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2019-11-16 00:26:45,783 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619934527] [2019-11-16 00:26:45,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-16 00:26:45,783 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:26:45,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-16 00:26:45,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2019-11-16 00:26:45,784 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 20 states. [2019-11-16 00:26:46,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:26:46,560 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2019-11-16 00:26:46,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-16 00:26:46,562 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2019-11-16 00:26:46,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:26:46,563 INFO L225 Difference]: With dead ends: 63 [2019-11-16 00:26:46,563 INFO L226 Difference]: Without dead ends: 49 [2019-11-16 00:26:46,564 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2019-11-16 00:26:46,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-16 00:26:46,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2019-11-16 00:26:46,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-16 00:26:46,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-11-16 00:26:46,570 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 27 [2019-11-16 00:26:46,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:26:46,570 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-11-16 00:26:46,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-16 00:26:46,570 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-11-16 00:26:46,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-16 00:26:46,571 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:26:46,571 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:26:46,778 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:26:46,778 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:26:46,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:26:46,779 INFO L82 PathProgramCache]: Analyzing trace with hash 2141321315, now seen corresponding path program 2 times [2019-11-16 00:26:46,779 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:26:46,779 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692055961] [2019-11-16 00:26:46,779 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:26:46,779 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:26:46,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:26:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:47,151 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 36 [2019-11-16 00:26:47,309 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-16 00:26:47,310 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692055961] [2019-11-16 00:26:47,310 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572865908] [2019-11-16 00:26:47,310 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:26:47,425 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-16 00:26:47,425 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:26:47,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 54 conjunts are in the unsatisfiable core [2019-11-16 00:26:47,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:26:47,583 INFO L341 Elim1Store]: treesize reduction 106, result has 24.8 percent of original size [2019-11-16 00:26:47,583 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 271 treesize of output 126 [2019-11-16 00:26:47,585 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:26:47,586 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:26:47,587 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-16 00:26:47,615 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:26:47,816 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:26:47,816 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.UnsupportedOperationException: expected NNF at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.UnsupportedOperationException: expected NNF at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:236) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive$TermWalker.walk(NonRecursive.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:195) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:74) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:275) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:253) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:292) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) ... 21 more [2019-11-16 00:26:47,820 INFO L168 Benchmark]: Toolchain (without parser) took 6311.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 201.9 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -194.2 MB). Peak memory consumption was 7.7 MB. Max. memory is 11.5 GB. [2019-11-16 00:26:47,820 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:26:47,821 INFO L168 Benchmark]: CACSL2BoogieTranslator took 624.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.7 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -203.6 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2019-11-16 00:26:47,821 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.13 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. [2019-11-16 00:26:47,822 INFO L168 Benchmark]: Boogie Preprocessor took 34.23 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:26:47,822 INFO L168 Benchmark]: RCFGBuilder took 466.49 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: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. [2019-11-16 00:26:47,823 INFO L168 Benchmark]: TraceAbstraction took 5137.01 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 36.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -23.7 MB). Peak memory consumption was 12.5 MB. Max. memory is 11.5 GB. [2019-11-16 00:26:47,825 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 624.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.7 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -203.6 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 46.13 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 34.23 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 466.49 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: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5137.01 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 36.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -23.7 MB). Peak memory consumption was 12.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.UnsupportedOperationException: expected NNF de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.UnsupportedOperationException: expected NNF: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-11-16 00:26:50,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-16 00:26:50,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-16 00:26:50,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-16 00:26:50,053 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-16 00:26:50,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-16 00:26:50,055 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-16 00:26:50,057 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-16 00:26:50,058 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-16 00:26:50,059 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-16 00:26:50,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-16 00:26:50,061 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-16 00:26:50,061 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-16 00:26:50,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-16 00:26:50,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-16 00:26:50,064 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-16 00:26:50,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-16 00:26:50,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-16 00:26:50,068 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-16 00:26:50,070 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-16 00:26:50,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-16 00:26:50,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-16 00:26:50,081 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-16 00:26:50,082 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-16 00:26:50,085 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-16 00:26:50,086 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-16 00:26:50,087 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-16 00:26:50,087 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-16 00:26:50,089 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-16 00:26:50,090 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-16 00:26:50,090 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-16 00:26:50,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-16 00:26:50,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-16 00:26:50,092 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-16 00:26:50,093 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-16 00:26:50,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-16 00:26:50,096 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-16 00:26:50,096 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-16 00:26:50,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-16 00:26:50,098 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-16 00:26:50,099 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-16 00:26:50,100 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-11-16 00:26:50,121 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-16 00:26:50,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-16 00:26:50,123 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-16 00:26:50,123 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-16 00:26:50,123 INFO L138 SettingsManager]: * Use SBE=true [2019-11-16 00:26:50,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-16 00:26:50,124 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-16 00:26:50,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-16 00:26:50,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-16 00:26:50,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-16 00:26:50,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-16 00:26:50,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-16 00:26:50,126 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-16 00:26:50,126 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-16 00:26:50,126 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-16 00:26:50,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-16 00:26:50,127 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-16 00:26:50,127 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-16 00:26:50,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-16 00:26:50,128 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-16 00:26:50,128 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-16 00:26:50,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-16 00:26:50,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-16 00:26:50,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-16 00:26:50,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-16 00:26:50,129 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-16 00:26:50,129 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-16 00:26:50,130 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-16 00:26:50,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-16 00:26:50,130 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-16 00:26:50,130 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_de802a19-fd16-493b-9ef5-e1eaec9ee965/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 -> 082b1bde50b1883aaa9112842176e8bb0db36577 [2019-11-16 00:26:50,180 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-16 00:26:50,195 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-16 00:26:50,198 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-16 00:26:50,200 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-16 00:26:50,200 INFO L275 PluginConnector]: CDTParser initialized [2019-11-16 00:26:50,201 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/bin/uautomizer/../../sv-benchmarks/c/list-simple/sll2c_remove_all.i [2019-11-16 00:26:50,262 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/bin/uautomizer/data/eeeff7c93/a36e2cbd6bcf43ad9391142e602efdab/FLAG88d813655 [2019-11-16 00:26:50,725 INFO L306 CDTParser]: Found 1 translation units. [2019-11-16 00:26:50,726 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/sv-benchmarks/c/list-simple/sll2c_remove_all.i [2019-11-16 00:26:50,739 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/bin/uautomizer/data/eeeff7c93/a36e2cbd6bcf43ad9391142e602efdab/FLAG88d813655 [2019-11-16 00:26:50,751 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/bin/uautomizer/data/eeeff7c93/a36e2cbd6bcf43ad9391142e602efdab [2019-11-16 00:26:50,753 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-16 00:26:50,754 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-16 00:26:50,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-16 00:26:50,755 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-16 00:26:50,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-16 00:26:50,759 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:26:50" (1/1) ... [2019-11-16 00:26:50,762 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3206de60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:50, skipping insertion in model container [2019-11-16 00:26:50,762 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:26:50" (1/1) ... [2019-11-16 00:26:50,768 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-16 00:26:50,800 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-16 00:26:51,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:26:51,183 INFO L188 MainTranslator]: Completed pre-run [2019-11-16 00:26:51,240 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:26:51,298 INFO L192 MainTranslator]: Completed translation [2019-11-16 00:26:51,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:51 WrapperNode [2019-11-16 00:26:51,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-16 00:26:51,300 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-16 00:26:51,300 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-16 00:26:51,300 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-16 00:26:51,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:51" (1/1) ... [2019-11-16 00:26:51,331 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:51" (1/1) ... [2019-11-16 00:26:51,354 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-16 00:26:51,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-16 00:26:51,355 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-16 00:26:51,355 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-16 00:26:51,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:51" (1/1) ... [2019-11-16 00:26:51,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:51" (1/1) ... [2019-11-16 00:26:51,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:51" (1/1) ... [2019-11-16 00:26:51,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:51" (1/1) ... [2019-11-16 00:26:51,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:51" (1/1) ... [2019-11-16 00:26:51,381 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:51" (1/1) ... [2019-11-16 00:26:51,384 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:51" (1/1) ... [2019-11-16 00:26:51,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-16 00:26:51,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-16 00:26:51,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-16 00:26:51,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-16 00:26:51,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/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 [2019-11-16 00:26:51,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-16 00:26:51,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-16 00:26:51,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-16 00:26:51,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-16 00:26:51,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-16 00:26:51,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-16 00:26:51,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-16 00:26:51,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-16 00:26:51,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-16 00:26:51,894 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-16 00:26:51,894 INFO L284 CfgBuilder]: Removed 19 assume(true) statements. [2019-11-16 00:26:51,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:26:51 BoogieIcfgContainer [2019-11-16 00:26:51,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-16 00:26:51,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-16 00:26:51,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-16 00:26:51,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-16 00:26:51,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:26:50" (1/3) ... [2019-11-16 00:26:51,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12b0747b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:26:51, skipping insertion in model container [2019-11-16 00:26:51,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:51" (2/3) ... [2019-11-16 00:26:51,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12b0747b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:26:51, skipping insertion in model container [2019-11-16 00:26:51,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:26:51" (3/3) ... [2019-11-16 00:26:51,902 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2c_remove_all.i [2019-11-16 00:26:51,911 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-16 00:26:51,918 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-16 00:26:51,928 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-16 00:26:51,949 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-16 00:26:51,949 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-16 00:26:51,949 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-16 00:26:51,950 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-16 00:26:51,950 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-16 00:26:51,950 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-16 00:26:51,950 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-16 00:26:51,950 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-16 00:26:51,963 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-11-16 00:26:51,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-16 00:26:51,969 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:26:51,970 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:26:51,971 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:26:51,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:26:51,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1935900066, now seen corresponding path program 1 times [2019-11-16 00:26:51,986 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-16 00:26:51,986 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [347153080] [2019-11-16 00:26:51,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/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 [2019-11-16 00:26:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:52,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-16 00:26:52,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:26:52,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:26:52,132 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-16 00:26:52,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:26:52,136 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [347153080] [2019-11-16 00:26:52,137 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:26:52,137 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-16 00:26:52,138 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488073098] [2019-11-16 00:26:52,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-16 00:26:52,142 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-16 00:26:52,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-16 00:26:52,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-16 00:26:52,157 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2019-11-16 00:26:52,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:26:52,174 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2019-11-16 00:26:52,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-16 00:26:52,176 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-11-16 00:26:52,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:26:52,185 INFO L225 Difference]: With dead ends: 41 [2019-11-16 00:26:52,185 INFO L226 Difference]: Without dead ends: 21 [2019-11-16 00:26:52,188 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-16 00:26:52,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-16 00:26:52,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-16 00:26:52,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-16 00:26:52,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-11-16 00:26:52,219 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 12 [2019-11-16 00:26:52,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:26:52,220 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-11-16 00:26:52,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-16 00:26:52,220 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-11-16 00:26:52,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-16 00:26:52,221 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:26:52,221 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:26:52,422 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-16 00:26:52,422 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:26:52,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:26:52,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1899961651, now seen corresponding path program 1 times [2019-11-16 00:26:52,423 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-16 00:26:52,423 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [479057385] [2019-11-16 00:26:52,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/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 [2019-11-16 00:26:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:52,530 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-16 00:26:52,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:26:52,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:26:52,556 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-16 00:26:52,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:26:52,577 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [479057385] [2019-11-16 00:26:52,578 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:26:52,578 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-16 00:26:52,578 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702970601] [2019-11-16 00:26:52,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-16 00:26:52,582 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-16 00:26:52,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-16 00:26:52,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-16 00:26:52,583 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 4 states. [2019-11-16 00:26:52,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:26:52,629 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2019-11-16 00:26:52,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-16 00:26:52,631 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-16 00:26:52,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:26:52,632 INFO L225 Difference]: With dead ends: 37 [2019-11-16 00:26:52,632 INFO L226 Difference]: Without dead ends: 25 [2019-11-16 00:26:52,633 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-16 00:26:52,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-16 00:26:52,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2019-11-16 00:26:52,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-16 00:26:52,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-11-16 00:26:52,640 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 12 [2019-11-16 00:26:52,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:26:52,640 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-11-16 00:26:52,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-16 00:26:52,641 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-11-16 00:26:52,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-16 00:26:52,646 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:26:52,647 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:26:52,849 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-16 00:26:52,850 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:26:52,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:26:52,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1177950341, now seen corresponding path program 1 times [2019-11-16 00:26:52,851 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-16 00:26:52,852 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [141288098] [2019-11-16 00:26:52,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/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 [2019-11-16 00:26:53,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:53,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-16 00:26:53,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:26:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:26:53,042 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-16 00:26:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:26:53,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [141288098] [2019-11-16 00:26:53,065 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:26:53,065 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-16 00:26:53,065 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508232260] [2019-11-16 00:26:53,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-16 00:26:53,066 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-16 00:26:53,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-16 00:26:53,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-16 00:26:53,066 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2019-11-16 00:26:53,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:26:53,137 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2019-11-16 00:26:53,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-16 00:26:53,139 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-11-16 00:26:53,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:26:53,140 INFO L225 Difference]: With dead ends: 33 [2019-11-16 00:26:53,140 INFO L226 Difference]: Without dead ends: 29 [2019-11-16 00:26:53,140 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-16 00:26:53,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-16 00:26:53,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-16 00:26:53,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-16 00:26:53,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-11-16 00:26:53,153 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 16 [2019-11-16 00:26:53,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:26:53,153 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-11-16 00:26:53,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-16 00:26:53,154 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-11-16 00:26:53,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-16 00:26:53,154 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:26:53,154 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:26:53,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-16 00:26:53,355 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:26:53,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:26:53,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1694844933, now seen corresponding path program 1 times [2019-11-16 00:26:53,356 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-16 00:26:53,356 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1612303508] [2019-11-16 00:26:53,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/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 [2019-11-16 00:26:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:53,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-16 00:26:53,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:26:53,661 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 11 treesize of output 7 [2019-11-16 00:26:53,664 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:26:53,680 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:26:53,686 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 11 treesize of output 7 [2019-11-16 00:26:53,686 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-16 00:26:53,696 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:26:53,697 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:26:53,697 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-16 00:26:53,727 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-16 00:26:53,728 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:26:53,746 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:26:53,751 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-16 00:26:53,751 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-16 00:26:53,757 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:26:53,758 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:26:53,758 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2019-11-16 00:26:53,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-16 00:26:53,778 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-16 00:26:53,825 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2019-11-16 00:26:53,826 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-16 00:26:53,845 INFO L567 ElimStorePlain]: treesize reduction 15, result has 31.8 percent of original size [2019-11-16 00:26:53,845 INFO L464 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2019-11-16 00:26:53,845 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-16 00:26:53,846 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:7 [2019-11-16 00:26:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-16 00:26:53,877 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1612303508] [2019-11-16 00:26:53,878 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:26:53,878 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 8 [2019-11-16 00:26:53,878 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191569353] [2019-11-16 00:26:53,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-16 00:26:53,880 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-16 00:26:53,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-16 00:26:53,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-16 00:26:53,881 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 8 states. [2019-11-16 00:26:54,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:26:54,220 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2019-11-16 00:26:54,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-16 00:26:54,221 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2019-11-16 00:26:54,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:26:54,222 INFO L225 Difference]: With dead ends: 41 [2019-11-16 00:26:54,223 INFO L226 Difference]: Without dead ends: 37 [2019-11-16 00:26:54,223 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-16 00:26:54,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-16 00:26:54,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2019-11-16 00:26:54,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-16 00:26:54,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-11-16 00:26:54,229 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 22 [2019-11-16 00:26:54,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:26:54,229 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-11-16 00:26:54,229 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-16 00:26:54,229 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-11-16 00:26:54,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-16 00:26:54,232 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:26:54,232 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] [2019-11-16 00:26:54,435 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-16 00:26:54,436 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:26:54,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:26:54,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1572647421, now seen corresponding path program 1 times [2019-11-16 00:26:54,436 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-16 00:26:54,437 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [244639161] [2019-11-16 00:26:54,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_de802a19-fd16-493b-9ef5-e1eaec9ee965/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 [2019-11-16 00:26:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:54,611 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-16 00:26:54,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:26:54,677 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:26:54,718 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:26:54,719 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 60 [2019-11-16 00:26:54,720 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:26:54,753 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:26:54,754 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 48 [2019-11-16 00:26:54,756 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-16 00:26:54,889 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2019-11-16 00:26:54,889 INFO L567 ElimStorePlain]: treesize reduction 20, result has 78.0 percent of original size [2019-11-16 00:26:54,913 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:26:54,914 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2019-11-16 00:26:54,915 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-16 00:26:55,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-16 00:26:55,117 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: expected NNF at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:236) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive$TermWalker.walk(NonRecursive.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:195) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:74) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:275) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:253) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:292) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.checkFeasibility(TraceAbstractionRefinementEngine.java:244) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:160) 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) [2019-11-16 00:26:55,121 INFO L168 Benchmark]: Toolchain (without parser) took 4366.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 941.6 MB in the beginning and 901.3 MB in the end (delta: 40.3 MB). Peak memory consumption was 182.9 MB. Max. memory is 11.5 GB. [2019-11-16 00:26:55,121 INFO L168 Benchmark]: CDTParser took 0.29 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. [2019-11-16 00:26:55,122 INFO L168 Benchmark]: CACSL2BoogieTranslator took 544.42 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -174.7 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. [2019-11-16 00:26:55,122 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.55 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. [2019-11-16 00:26:55,122 INFO L168 Benchmark]: Boogie Preprocessor took 39.17 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. [2019-11-16 00:26:55,123 INFO L168 Benchmark]: RCFGBuilder took 501.64 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: 32.2 MB). Peak memory consumption was 32.2 MB. Max. memory is 11.5 GB. [2019-11-16 00:26:55,123 INFO L168 Benchmark]: TraceAbstraction took 3223.04 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 901.3 MB in the end (delta: 182.7 MB). Peak memory consumption was 182.7 MB. Max. memory is 11.5 GB. [2019-11-16 00:26:55,126 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 1.0 GB. Free memory is still 972.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 544.42 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -174.7 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 54.55 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 39.17 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 501.64 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 32.2 MB). Peak memory consumption was 32.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3223.04 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 901.3 MB in the end (delta: 182.7 MB). Peak memory consumption was 182.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: expected NNF de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: expected NNF: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:236) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...