./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test23-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test23-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/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 b974f281a213c0803f91ef44d205e442fb2a5f8f .................................................................................................................................................................................................................................................................................. 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_1e6c7b3b-80d6-4f55-aa18-511721168e5b/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test23-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/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 b974f281a213c0803f91ef44d205e442fb2a5f8f ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-25 08:58:20,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:58:20,522 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:58:20,536 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:58:20,536 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:58:20,538 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:58:20,539 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:58:20,548 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:58:20,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:58:20,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:58:20,557 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:58:20,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:58:20,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:58:20,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:58:20,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:58:20,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:58:20,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:58:20,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:58:20,566 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:58:20,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:58:20,572 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:58:20,575 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:58:20,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:58:20,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:58:20,580 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:58:20,580 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:58:20,580 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:58:20,582 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:58:20,582 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:58:20,583 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:58:20,583 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:58:20,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:58:20,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:58:20,585 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:58:20,586 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:58:20,586 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:58:20,587 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:58:20,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:58:20,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:58:20,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:58:20,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:58:20,589 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-25 08:58:20,612 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:58:20,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:58:20,615 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:58:20,615 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:58:20,615 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:58:20,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:58:20,616 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:58:20,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:58:20,616 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:58:20,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:58:20,617 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-25 08:58:20,618 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:58:20,618 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-25 08:58:20,618 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:58:20,618 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:58:20,618 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:58:20,618 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-25 08:58:20,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:58:20,619 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:58:20,619 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:58:20,619 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:58:20,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:58:20,620 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:58:20,620 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:58:20,620 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-25 08:58:20,620 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:58:20,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-25 08:58:20,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-25 08:58:20,621 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_1e6c7b3b-80d6-4f55-aa18-511721168e5b/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 -> b974f281a213c0803f91ef44d205e442fb2a5f8f [2019-11-25 08:58:20,786 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:58:20,798 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:58:20,801 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:58:20,802 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:58:20,803 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:58:20,803 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/bin/uautomizer/../../sv-benchmarks/c/ldv-regression/test23-1.c [2019-11-25 08:58:20,859 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/bin/uautomizer/data/f1a437cea/5c62e4fa7dc74dc897a2be02628dd794/FLAGa54d1240d [2019-11-25 08:58:21,275 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:58:21,276 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/sv-benchmarks/c/ldv-regression/test23-1.c [2019-11-25 08:58:21,281 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/bin/uautomizer/data/f1a437cea/5c62e4fa7dc74dc897a2be02628dd794/FLAGa54d1240d [2019-11-25 08:58:21,661 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/bin/uautomizer/data/f1a437cea/5c62e4fa7dc74dc897a2be02628dd794 [2019-11-25 08:58:21,663 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:58:21,664 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:58:21,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:58:21,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:58:21,667 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:58:21,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:58:21" (1/1) ... [2019-11-25 08:58:21,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e38fc68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:21, skipping insertion in model container [2019-11-25 08:58:21,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:58:21" (1/1) ... [2019-11-25 08:58:21,687 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:58:21,704 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:58:21,967 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:58:21,981 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:58:21,998 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:58:22,016 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:58:22,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:22 WrapperNode [2019-11-25 08:58:22,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:58:22,018 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:58:22,018 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:58:22,018 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:58:22,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:22" (1/1) ... [2019-11-25 08:58:22,036 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:22" (1/1) ... [2019-11-25 08:58:22,057 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:58:22,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:58:22,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:58:22,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:58:22,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:22" (1/1) ... [2019-11-25 08:58:22,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:22" (1/1) ... [2019-11-25 08:58:22,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:22" (1/1) ... [2019-11-25 08:58:22,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:22" (1/1) ... [2019-11-25 08:58:22,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:22" (1/1) ... [2019-11-25 08:58:22,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:22" (1/1) ... [2019-11-25 08:58:22,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:22" (1/1) ... [2019-11-25 08:58:22,094 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:58:22,095 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:58:22,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:58:22,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:58:22,096 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/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 [2019-11-25 08:58:22,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-25 08:58:22,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:58:22,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:58:22,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-25 08:58:22,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-25 08:58:22,523 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:58:22,523 INFO L284 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-25 08:58:22,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:58:22 BoogieIcfgContainer [2019-11-25 08:58:22,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:58:22,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:58:22,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:58:22,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:58:22,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:58:21" (1/3) ... [2019-11-25 08:58:22,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b32d05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:58:22, skipping insertion in model container [2019-11-25 08:58:22,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:22" (2/3) ... [2019-11-25 08:58:22,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b32d05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:58:22, skipping insertion in model container [2019-11-25 08:58:22,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:58:22" (3/3) ... [2019-11-25 08:58:22,531 INFO L109 eAbstractionObserver]: Analyzing ICFG test23-1.c [2019-11-25 08:58:22,538 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:58:22,543 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-25 08:58:22,551 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-25 08:58:22,570 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:58:22,570 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-25 08:58:22,571 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:58:22,571 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:58:22,571 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:58:22,571 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:58:22,571 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:58:22,571 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:58:22,583 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-25 08:58:22,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-25 08:58:22,587 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:58:22,587 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:58:22,588 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:58:22,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:58:22,593 INFO L82 PathProgramCache]: Analyzing trace with hash 2100293056, now seen corresponding path program 1 times [2019-11-25 08:58:22,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:58:22,599 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734344797] [2019-11-25 08:58:22,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:58:22,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:58:22,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734344797] [2019-11-25 08:58:22,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:58:22,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-25 08:58:22,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770235969] [2019-11-25 08:58:22,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-25 08:58:22,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:58:22,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-25 08:58:22,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-25 08:58:22,747 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-11-25 08:58:22,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:58:22,760 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2019-11-25 08:58:22,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-25 08:58:22,761 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2019-11-25 08:58:22,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:58:22,769 INFO L225 Difference]: With dead ends: 30 [2019-11-25 08:58:22,769 INFO L226 Difference]: Without dead ends: 17 [2019-11-25 08:58:22,771 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-25 08:58:22,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-25 08:58:22,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-25 08:58:22,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-25 08:58:22,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-25 08:58:22,797 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 15 [2019-11-25 08:58:22,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:58:22,797 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-25 08:58:22,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-25 08:58:22,797 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-25 08:58:22,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-25 08:58:22,798 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:58:22,798 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:58:22,798 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:58:22,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:58:22,799 INFO L82 PathProgramCache]: Analyzing trace with hash 478567452, now seen corresponding path program 1 times [2019-11-25 08:58:22,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:58:22,799 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022761149] [2019-11-25 08:58:22,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:58:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:23,007 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Undeclared function symbol (const Int) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.term(NoopScript.java:478) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.term(WrapperScript.java:250) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.term(WrapperScript.java:250) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.SmtUtils.termWithLocalSimplification(SmtUtils.java:1315) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.SmtUtils.termWithLocalSimplification(SmtUtils.java:1196) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.TermTransferrer.convertApplicationTerm(TermTransferrer.java:182) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:339) 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.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computePredicates(NestedInterpolantsBuilder.java:573) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:171) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:300) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:202) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:107) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.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.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) 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:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) 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) [2019-11-25 08:58:23,012 INFO L168 Benchmark]: Toolchain (without parser) took 1346.76 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 109.1 MB). Free memory was 950.1 MB in the beginning and 1.0 GB in the end (delta: -90.2 MB). Peak memory consumption was 18.8 MB. Max. memory is 11.5 GB. [2019-11-25 08:58:23,012 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:58:23,013 INFO L168 Benchmark]: CACSL2BoogieTranslator took 353.16 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 109.1 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -149.5 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-11-25 08:58:23,013 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.91 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:58:23,014 INFO L168 Benchmark]: Boogie Preprocessor took 37.33 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:58:23,014 INFO L168 Benchmark]: RCFGBuilder took 429.35 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 31.1 MB). Peak memory consumption was 31.1 MB. Max. memory is 11.5 GB. [2019-11-25 08:58:23,015 INFO L168 Benchmark]: TraceAbstraction took 484.76 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 28.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 11.5 GB. [2019-11-25 08:58:23,018 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 353.16 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 109.1 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -149.5 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 38.91 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 37.33 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 429.35 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 31.1 MB). Peak memory consumption was 31.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 484.76 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 28.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Undeclared function symbol (const Int) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Undeclared function symbol (const Int): de.uni_freiburg.informatik.ultimate.logic.NoopScript.term(NoopScript.java:478) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-25 08:58:24,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:58:24,908 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:58:24,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:58:24,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:58:24,920 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:58:24,921 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:58:24,923 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:58:24,925 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:58:24,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:58:24,926 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:58:24,927 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:58:24,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:58:24,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:58:24,930 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:58:24,931 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:58:24,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:58:24,932 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:58:24,934 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:58:24,936 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:58:24,937 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:58:24,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:58:24,939 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:58:24,940 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:58:24,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:58:24,943 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:58:24,943 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:58:24,944 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:58:24,944 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:58:24,945 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:58:24,945 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:58:24,946 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:58:24,946 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:58:24,947 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:58:24,948 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:58:24,948 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:58:24,949 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:58:24,949 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:58:24,949 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:58:24,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:58:24,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:58:24,951 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-11-25 08:58:24,965 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:58:24,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:58:24,966 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:58:24,966 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:58:24,966 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:58:24,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:58:24,967 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:58:24,967 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:58:24,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:58:24,970 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-25 08:58:24,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:58:24,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-25 08:58:24,971 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-25 08:58:24,971 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-25 08:58:24,971 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-25 08:58:24,972 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:58:24,972 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:58:24,972 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:58:24,972 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-25 08:58:24,973 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:58:24,973 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:58:24,973 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:58:24,973 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:58:24,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:58:24,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:58:24,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:58:24,975 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-25 08:58:24,975 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-25 08:58:24,975 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-25 08:58:24,975 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-25 08:58:24,975 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-25 08:58:24,976 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_1e6c7b3b-80d6-4f55-aa18-511721168e5b/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 -> b974f281a213c0803f91ef44d205e442fb2a5f8f [2019-11-25 08:58:25,257 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:58:25,272 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:58:25,276 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:58:25,277 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:58:25,278 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:58:25,279 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/bin/uautomizer/../../sv-benchmarks/c/ldv-regression/test23-1.c [2019-11-25 08:58:25,330 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/bin/uautomizer/data/15e1e874e/c9c06297636c42ea8ae751f933bf01fe/FLAG6b19dcd9d [2019-11-25 08:58:25,731 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:58:25,732 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/sv-benchmarks/c/ldv-regression/test23-1.c [2019-11-25 08:58:25,738 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/bin/uautomizer/data/15e1e874e/c9c06297636c42ea8ae751f933bf01fe/FLAG6b19dcd9d [2019-11-25 08:58:26,163 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/bin/uautomizer/data/15e1e874e/c9c06297636c42ea8ae751f933bf01fe [2019-11-25 08:58:26,167 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:58:26,168 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:58:26,171 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:58:26,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:58:26,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:58:26,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:58:26" (1/1) ... [2019-11-25 08:58:26,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dab5ad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:26, skipping insertion in model container [2019-11-25 08:58:26,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:58:26" (1/1) ... [2019-11-25 08:58:26,186 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:58:26,203 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:58:26,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:58:26,372 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:58:26,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:58:26,458 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:58:26,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:26 WrapperNode [2019-11-25 08:58:26,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:58:26,461 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:58:26,461 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:58:26,461 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:58:26,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:26" (1/1) ... [2019-11-25 08:58:26,478 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:26" (1/1) ... [2019-11-25 08:58:26,498 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:58:26,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:58:26,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:58:26,499 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:58:26,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:26" (1/1) ... [2019-11-25 08:58:26,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:26" (1/1) ... [2019-11-25 08:58:26,511 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:26" (1/1) ... [2019-11-25 08:58:26,511 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:26" (1/1) ... [2019-11-25 08:58:26,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:26" (1/1) ... [2019-11-25 08:58:26,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:26" (1/1) ... [2019-11-25 08:58:26,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:26" (1/1) ... [2019-11-25 08:58:26,526 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:58:26,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:58:26,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:58:26,527 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:58:26,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/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 [2019-11-25 08:58:26,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-25 08:58:26,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:58:26,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:58:26,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-25 08:58:26,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-25 08:58:26,905 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:58:26,905 INFO L284 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-25 08:58:26,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:58:26 BoogieIcfgContainer [2019-11-25 08:58:26,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:58:26,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:58:26,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:58:26,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:58:26,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:58:26" (1/3) ... [2019-11-25 08:58:26,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f93ec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:58:26, skipping insertion in model container [2019-11-25 08:58:26,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:26" (2/3) ... [2019-11-25 08:58:26,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f93ec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:58:26, skipping insertion in model container [2019-11-25 08:58:26,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:58:26" (3/3) ... [2019-11-25 08:58:26,913 INFO L109 eAbstractionObserver]: Analyzing ICFG test23-1.c [2019-11-25 08:58:26,922 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:58:26,927 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-25 08:58:26,934 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-25 08:58:26,951 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:58:26,951 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-25 08:58:26,951 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:58:26,952 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:58:26,952 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:58:26,952 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:58:26,952 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:58:26,952 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:58:26,964 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-25 08:58:26,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-25 08:58:26,969 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:58:26,970 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:58:26,970 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:58:26,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:58:26,975 INFO L82 PathProgramCache]: Analyzing trace with hash 2100293056, now seen corresponding path program 1 times [2019-11-25 08:58:26,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:58:26,984 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [59748089] [2019-11-25 08:58:26,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/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 [2019-11-25 08:58:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:27,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-25 08:58:27,099 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:58:27,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:58:27,110 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:58:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:58:27,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [59748089] [2019-11-25 08:58:27,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:58:27,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-25 08:58:27,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328159198] [2019-11-25 08:58:27,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-25 08:58:27,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:58:27,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-25 08:58:27,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-25 08:58:27,134 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-11-25 08:58:27,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:58:27,145 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2019-11-25 08:58:27,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-25 08:58:27,147 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2019-11-25 08:58:27,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:58:27,155 INFO L225 Difference]: With dead ends: 30 [2019-11-25 08:58:27,155 INFO L226 Difference]: Without dead ends: 17 [2019-11-25 08:58:27,158 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-25 08:58:27,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-25 08:58:27,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-25 08:58:27,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-25 08:58:27,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-25 08:58:27,188 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 15 [2019-11-25 08:58:27,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:58:27,189 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-25 08:58:27,189 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-25 08:58:27,189 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-25 08:58:27,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-25 08:58:27,189 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:58:27,190 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:58:27,391 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:58:27,392 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:58:27,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:58:27,392 INFO L82 PathProgramCache]: Analyzing trace with hash 478567452, now seen corresponding path program 1 times [2019-11-25 08:58:27,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:58:27,394 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [529308838] [2019-11-25 08:58:27,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/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 [2019-11-25 08:58:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:27,510 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-25 08:58:27,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:58:27,752 INFO L377 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 15 treesize of output 11 [2019-11-25 08:58:27,753 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:27,795 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:27,796 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. [2019-11-25 08:58:27,797 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2019-11-25 08:58:27,881 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-25 08:58:27,884 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:27,885 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 15 [2019-11-25 08:58:27,886 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:27,904 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:27,905 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:58:27,905 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:12 [2019-11-25 08:58:27,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:58:27,947 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:58:28,063 INFO L377 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 55 treesize of output 46 [2019-11-25 08:58:28,065 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:58:28,141 INFO L567 ElimStorePlain]: treesize reduction 25, result has 56.9 percent of original size [2019-11-25 08:58:28,142 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:28,151 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-25 08:58:28,151 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:33 [2019-11-25 08:58:28,152 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:58:28,482 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [529308838] [2019-11-25 08:58:28,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:58:28,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 19 [2019-11-25 08:58:28,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608073452] [2019-11-25 08:58:28,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-25 08:58:28,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:58:28,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-25 08:58:28,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2019-11-25 08:58:28,486 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 19 states. [2019-11-25 08:58:30,422 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2019-11-25 08:58:30,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:58:30,643 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2019-11-25 08:58:30,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-25 08:58:30,647 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 16 [2019-11-25 08:58:30,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:58:30,648 INFO L225 Difference]: With dead ends: 67 [2019-11-25 08:58:30,649 INFO L226 Difference]: Without dead ends: 62 [2019-11-25 08:58:30,652 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=290, Invalid=1042, Unknown=0, NotChecked=0, Total=1332 [2019-11-25 08:58:30,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-25 08:58:30,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 27. [2019-11-25 08:58:30,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-25 08:58:30,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-11-25 08:58:30,661 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 16 [2019-11-25 08:58:30,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:58:30,661 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-11-25 08:58:30,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-25 08:58:30,662 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-11-25 08:58:30,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-25 08:58:30,662 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:58:30,663 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:58:30,864 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:58:30,864 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:58:30,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:58:30,865 INFO L82 PathProgramCache]: Analyzing trace with hash 571755747, now seen corresponding path program 1 times [2019-11-25 08:58:30,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:58:30,866 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1835046082] [2019-11-25 08:58:30,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/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 [2019-11-25 08:58:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:30,942 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:58:30,943 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:58:30,947 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 23 treesize of output 21 [2019-11-25 08:58:30,947 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-25 08:58:30,961 INFO L567 ElimStorePlain]: treesize reduction 14, result has 22.2 percent of original size [2019-11-25 08:58:30,961 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:58:30,962 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:4 [2019-11-25 08:58:31,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-25 08:58:31,010 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:58:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-25 08:58:31,013 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1835046082] [2019-11-25 08:58:31,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:58:31,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2019-11-25 08:58:31,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677428522] [2019-11-25 08:58:31,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-25 08:58:31,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:58:31,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-25 08:58:31,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-11-25 08:58:31,015 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 9 states. [2019-11-25 08:58:31,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:58:31,343 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2019-11-25 08:58:31,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-25 08:58:31,344 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2019-11-25 08:58:31,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:58:31,345 INFO L225 Difference]: With dead ends: 62 [2019-11-25 08:58:31,346 INFO L226 Difference]: Without dead ends: 50 [2019-11-25 08:58:31,346 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2019-11-25 08:58:31,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-25 08:58:31,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 27. [2019-11-25 08:58:31,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-25 08:58:31,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-11-25 08:58:31,370 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 18 [2019-11-25 08:58:31,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:58:31,371 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-11-25 08:58:31,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-25 08:58:31,371 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-11-25 08:58:31,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-25 08:58:31,380 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:58:31,380 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:58:31,587 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:58:31,587 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:58:31,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:58:31,588 INFO L82 PathProgramCache]: Analyzing trace with hash 829921185, now seen corresponding path program 1 times [2019-11-25 08:58:31,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:58:31,589 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2031508527] [2019-11-25 08:58:31,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/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 [2019-11-25 08:58:31,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:31,698 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-25 08:58:31,700 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:58:31,825 INFO L377 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 [2019-11-25 08:58:31,826 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:31,848 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:31,849 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:58:31,849 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:24 [2019-11-25 08:58:31,956 INFO L377 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 31 treesize of output 15 [2019-11-25 08:58:31,957 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:31,969 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:31,969 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:58:31,970 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:16 [2019-11-25 08:58:32,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:58:32,029 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:58:32,150 INFO L377 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 57 treesize of output 48 [2019-11-25 08:58:32,151 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:58:32,210 INFO L567 ElimStorePlain]: treesize reduction 25, result has 55.4 percent of original size [2019-11-25 08:58:32,211 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:32,214 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-25 08:58:32,214 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:31 [2019-11-25 08:58:32,215 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:58:32,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2031508527] [2019-11-25 08:58:32,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:58:32,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2019-11-25 08:58:32,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597935170] [2019-11-25 08:58:32,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-25 08:58:32,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:58:32,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-25 08:58:32,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-11-25 08:58:32,268 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 14 states. [2019-11-25 08:58:34,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:58:34,596 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2019-11-25 08:58:34,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-25 08:58:34,597 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2019-11-25 08:58:34,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:58:34,599 INFO L225 Difference]: With dead ends: 69 [2019-11-25 08:58:34,599 INFO L226 Difference]: Without dead ends: 64 [2019-11-25 08:58:34,600 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=395, Invalid=1327, Unknown=0, NotChecked=0, Total=1722 [2019-11-25 08:58:34,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-25 08:58:34,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 28. [2019-11-25 08:58:34,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-25 08:58:34,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-25 08:58:34,608 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 18 [2019-11-25 08:58:34,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:58:34,609 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-25 08:58:34,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-25 08:58:34,609 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-25 08:58:34,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-25 08:58:34,610 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:58:34,610 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:58:34,812 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:58:34,812 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:58:34,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:58:34,813 INFO L82 PathProgramCache]: Analyzing trace with hash -2001461840, now seen corresponding path program 1 times [2019-11-25 08:58:34,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:58:34,813 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [992982988] [2019-11-25 08:58:34,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/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 [2019-11-25 08:58:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:34,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-25 08:58:34,946 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:58:35,055 INFO L377 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 15 treesize of output 11 [2019-11-25 08:58:35,056 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:35,076 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:35,077 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. [2019-11-25 08:58:35,077 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2019-11-25 08:58:35,697 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-25 08:58:35,704 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:35,704 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 15 [2019-11-25 08:58:35,705 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:35,722 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:35,723 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:58:35,723 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:12 [2019-11-25 08:58:35,810 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:58:35,810 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:58:36,708 INFO L377 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 175 treesize of output 148 [2019-11-25 08:58:36,709 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:36,709 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:36,710 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:36,710 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:36,711 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:36,712 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:36,713 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:36,714 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:36,714 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:36,715 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:36,716 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:36,717 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:36,718 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:58:36,805 INFO L567 ElimStorePlain]: treesize reduction 119, result has 23.7 percent of original size [2019-11-25 08:58:36,805 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:36,808 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-25 08:58:36,808 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:92, output treesize:37 [2019-11-25 08:58:36,808 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:37,303 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:58:37,303 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [992982988] [2019-11-25 08:58:37,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:58:37,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2019-11-25 08:58:37,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812568358] [2019-11-25 08:58:37,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-25 08:58:37,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:58:37,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-25 08:58:37,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2019-11-25 08:58:37,305 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 33 states. [2019-11-25 08:58:38,446 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2019-11-25 08:58:39,102 WARN L192 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-11-25 08:58:39,850 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2019-11-25 08:58:40,480 WARN L192 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2019-11-25 08:58:41,083 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2019-11-25 08:58:41,686 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2019-11-25 08:58:43,805 WARN L192 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2019-11-25 08:58:44,219 WARN L192 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2019-11-25 08:58:44,635 WARN L192 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2019-11-25 08:58:45,016 WARN L192 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2019-11-25 08:58:45,295 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2019-11-25 08:58:45,637 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2019-11-25 08:58:45,954 WARN L192 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2019-11-25 08:58:46,243 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2019-11-25 08:58:46,562 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2019-11-25 08:58:46,985 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2019-11-25 08:58:47,186 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2019-11-25 08:58:47,827 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2019-11-25 08:58:48,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:58:48,836 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2019-11-25 08:58:48,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-11-25 08:58:48,837 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 24 [2019-11-25 08:58:48,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:58:48,838 INFO L225 Difference]: With dead ends: 95 [2019-11-25 08:58:48,838 INFO L226 Difference]: Without dead ends: 90 [2019-11-25 08:58:48,842 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1987 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=1714, Invalid=5942, Unknown=0, NotChecked=0, Total=7656 [2019-11-25 08:58:48,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-25 08:58:48,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 43. [2019-11-25 08:58:48,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-25 08:58:48,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2019-11-25 08:58:48,852 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 24 [2019-11-25 08:58:48,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:58:48,853 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2019-11-25 08:58:48,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-25 08:58:48,853 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2019-11-25 08:58:48,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-25 08:58:48,854 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:58:48,854 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:58:49,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:58:49,055 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:58:49,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:58:49,055 INFO L82 PathProgramCache]: Analyzing trace with hash -372767691, now seen corresponding path program 2 times [2019-11-25 08:58:49,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:58:49,055 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1801093490] [2019-11-25 08:58:49,055 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:58:49,209 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:58:49,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:58:49,212 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-25 08:58:49,214 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:58:49,308 INFO L377 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 [2019-11-25 08:58:49,308 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:49,321 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:49,321 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:58:49,321 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:24 [2019-11-25 08:58:49,748 INFO L377 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 31 treesize of output 15 [2019-11-25 08:58:49,748 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:49,768 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:49,768 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:58:49,769 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:12 [2019-11-25 08:58:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:58:49,839 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:58:50,706 INFO L377 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 181 treesize of output 154 [2019-11-25 08:58:50,706 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:50,706 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:50,707 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:50,707 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:50,708 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:50,708 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:50,709 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:50,710 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:50,710 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:50,711 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:50,711 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:50,712 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:50,713 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:58:50,796 INFO L567 ElimStorePlain]: treesize reduction 125, result has 24.7 percent of original size [2019-11-25 08:58:50,797 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:50,800 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-25 08:58:50,800 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:102, output treesize:41 [2019-11-25 08:58:50,800 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:58:50,832 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:58:50,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1801093490] [2019-11-25 08:58:50,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:58:50,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2019-11-25 08:58:50,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590625056] [2019-11-25 08:58:50,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-25 08:58:50,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:58:50,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-25 08:58:50,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2019-11-25 08:58:50,835 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 26 states. [2019-11-25 08:58:53,144 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2019-11-25 08:58:53,992 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2019-11-25 08:58:54,457 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-11-25 08:58:55,602 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2019-11-25 08:58:55,915 WARN L192 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2019-11-25 08:58:56,308 WARN L192 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2019-11-25 08:58:56,583 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2019-11-25 08:58:56,885 WARN L192 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2019-11-25 08:58:57,243 WARN L192 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2019-11-25 08:58:57,569 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2019-11-25 08:58:57,832 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2019-11-25 08:58:58,118 WARN L192 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2019-11-25 08:58:58,347 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2019-11-25 08:58:58,605 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2019-11-25 08:58:58,894 WARN L192 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2019-11-25 08:58:59,506 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2019-11-25 08:58:59,859 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2019-11-25 08:59:00,062 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2019-11-25 08:59:01,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:59:01,823 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2019-11-25 08:59:01,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2019-11-25 08:59:01,824 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2019-11-25 08:59:01,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:59:01,824 INFO L225 Difference]: With dead ends: 111 [2019-11-25 08:59:01,825 INFO L226 Difference]: Without dead ends: 106 [2019-11-25 08:59:01,827 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2927 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=1864, Invalid=7256, Unknown=0, NotChecked=0, Total=9120 [2019-11-25 08:59:01,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-11-25 08:59:01,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 42. [2019-11-25 08:59:01,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-25 08:59:01,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2019-11-25 08:59:01,837 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 26 [2019-11-25 08:59:01,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:59:01,838 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2019-11-25 08:59:01,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-25 08:59:01,838 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2019-11-25 08:59:01,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-25 08:59:01,839 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:59:01,839 INFO L410 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:59:02,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:59:02,043 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:59:02,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:59:02,044 INFO L82 PathProgramCache]: Analyzing trace with hash 958970451, now seen corresponding path program 2 times [2019-11-25 08:59:02,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:59:02,045 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1713166236] [2019-11-25 08:59:02,045 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/bin/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:59:02,269 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:59:02,269 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-11-25 08:59:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:59:02,463 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-25 08:59:02,463 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-25 08:59:02,668 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:59:02,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:59:02 BoogieIcfgContainer [2019-11-25 08:59:02,750 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:59:02,750 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:59:02,750 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:59:02,751 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:59:02,751 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:58:26" (3/4) ... [2019-11-25 08:59:02,753 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-25 08:59:02,817 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1e6c7b3b-80d6-4f55-aa18-511721168e5b/bin/uautomizer/witness.graphml [2019-11-25 08:59:02,817 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:59:02,818 INFO L168 Benchmark]: Toolchain (without parser) took 36650.39 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 339.2 MB). Free memory was 960.4 MB in the beginning and 1.2 GB in the end (delta: -240.7 MB). Peak memory consumption was 98.5 MB. Max. memory is 11.5 GB. [2019-11-25 08:59:02,818 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 987.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:59:02,819 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.11 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 157.8 MB). Free memory was 960.4 MB in the beginning and 1.2 GB in the end (delta: -200.5 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. [2019-11-25 08:59:02,819 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.07 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 6.4 MB). Peak memory consumption was 6.4 MB. Max. memory is 11.5 GB. [2019-11-25 08:59:02,820 INFO L168 Benchmark]: Boogie Preprocessor took 27.32 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 6.4 MB). Peak memory consumption was 6.4 MB. Max. memory is 11.5 GB. [2019-11-25 08:59:02,820 INFO L168 Benchmark]: RCFGBuilder took 380.03 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: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. [2019-11-25 08:59:02,821 INFO L168 Benchmark]: TraceAbstraction took 35842.56 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 181.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -87.1 MB). Peak memory consumption was 94.3 MB. Max. memory is 11.5 GB. [2019-11-25 08:59:02,821 INFO L168 Benchmark]: Witness Printer took 66.66 ms. Allocated memory is still 1.4 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 11.5 GB. [2019-11-25 08:59:02,824 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 987.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 288.11 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 157.8 MB). Free memory was 960.4 MB in the beginning and 1.2 GB in the end (delta: -200.5 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 38.07 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 6.4 MB). Peak memory consumption was 6.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 27.32 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 6.4 MB). Peak memory consumption was 6.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 380.03 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: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 35842.56 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 181.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -87.1 MB). Peak memory consumption was 94.3 MB. Max. memory is 11.5 GB. * Witness Printer took 66.66 ms. Allocated memory is still 1.4 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 50]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] struct dummy d1, d2; VAL [d1={3:0}, d2={2147483644:0}] [L14] d1.a = __VERIFIER_nondet_int() [L15] d1.b = __VERIFIER_nondet_int() [L17] d2.a = __VERIFIER_nondet_int() [L18] d2.b = __VERIFIER_nondet_int() [L23] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 VAL [d1={3:0}, d2={2147483644:0}] [L23] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L34] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(); [L23] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 VAL [d1={3:0}, d2={2147483644:0}] [L23] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L34] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(); [L35] int i = __VERIFIER_nondet_int(); [L36] COND TRUE pd1 != 0 && pd1 == pd2 && i >= 0 && i < 10 [L37] pd2->array[i] = i [L38] int *pa = &pd1->array[i]; [L39] EXPR pd2->array[i] [L39] i = pd2->array[i] - 10 [L40] EXPR \read(*pa) VAL [d1={3:0}, d2={2147483644:0}] [L40] COND TRUE i <= *pa [L41] ++i VAL [d1={3:0}, d2={2147483644:0}] [L40] EXPR \read(*pa) VAL [d1={3:0}, d2={2147483644:0}] [L40] COND TRUE i <= *pa [L41] ++i VAL [d1={3:0}, d2={2147483644:0}] [L40] EXPR \read(*pa) VAL [d1={3:0}, d2={2147483644:0}] [L40] COND TRUE i <= *pa [L41] ++i VAL [d1={3:0}, d2={2147483644:0}] [L40] EXPR \read(*pa) VAL [d1={3:0}, d2={2147483644:0}] [L40] COND TRUE i <= *pa [L41] ++i VAL [d1={3:0}, d2={2147483644:0}] [L40] EXPR \read(*pa) VAL [d1={3:0}, d2={2147483644:0}] [L40] COND TRUE i <= *pa [L41] ++i VAL [d1={3:0}, d2={2147483644:0}] [L40] EXPR \read(*pa) VAL [d1={3:0}, d2={2147483644:0}] [L40] COND TRUE i <= *pa [L41] ++i VAL [d1={3:0}, d2={2147483644:0}] [L40] EXPR \read(*pa) VAL [d1={3:0}, d2={2147483644:0}] [L40] COND TRUE i <= *pa [L41] ++i VAL [d1={3:0}, d2={2147483644:0}] [L40] EXPR \read(*pa) VAL [d1={3:0}, d2={2147483644:0}] [L40] COND TRUE i <= *pa [L41] ++i VAL [d1={3:0}, d2={2147483644:0}] [L40] EXPR \read(*pa) VAL [d1={3:0}, d2={2147483644:0}] [L40] COND TRUE i <= *pa [L41] ++i VAL [d1={3:0}, d2={2147483644:0}] [L40] EXPR \read(*pa) VAL [d1={3:0}, d2={2147483644:0}] [L40] COND TRUE i <= *pa [L41] ++i VAL [d1={3:0}, d2={2147483644:0}] [L40] EXPR \read(*pa) VAL [d1={3:0}, d2={2147483644:0}] [L40] COND TRUE i <= *pa [L41] ++i VAL [d1={3:0}, d2={2147483644:0}] [L40] EXPR \read(*pa) VAL [d1={3:0}, d2={2147483644:0}] [L40] COND FALSE !(i <= *pa) [L28] EXPR s1->array[i] [L28] return s1->array[i] == i; [L43] COND TRUE !check(pd2, i) [L50] __VERIFIER_error() VAL [d1={3:0}, d2={2147483644:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 1 error locations. Result: UNSAFE, OverallTime: 35.7s, OverallIterations: 7, TraceHistogramMax: 12, AutomataDifference: 27.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 117 SDtfs, 531 SDslu, 743 SDs, 0 SdLazy, 1680 SolverSat, 268 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 401 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5539 ImplicationChecksByTransitivity, 27.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 205 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 155 NumberOfCodeBlocks, 155 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 222 ConstructedInterpolants, 12 QuantifiedInterpolants, 42234 SizeOfPredicates, 61 NumberOfNonLiveVariables, 356 ConjunctsInSsa, 113 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 4/108 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...