./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i -s /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/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 64bit --witnessprinter.graph.data.programhash b5bcbec631d7b9271f7e5e518d6c2fef259d62bf .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i -s /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/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 64bit --witnessprinter.graph.data.programhash b5bcbec631d7b9271f7e5e518d6c2fef259d62bf ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: NullPointerException: null --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-15 23:37:48,134 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 23:37:48,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 23:37:48,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 23:37:48,150 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 23:37:48,151 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 23:37:48,153 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 23:37:48,162 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 23:37:48,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 23:37:48,170 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 23:37:48,172 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 23:37:48,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 23:37:48,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 23:37:48,175 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 23:37:48,176 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 23:37:48,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 23:37:48,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 23:37:48,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 23:37:48,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 23:37:48,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 23:37:48,187 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 23:37:48,189 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 23:37:48,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 23:37:48,192 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 23:37:48,195 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 23:37:48,196 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 23:37:48,196 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 23:37:48,197 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 23:37:48,198 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 23:37:48,198 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 23:37:48,199 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 23:37:48,199 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 23:37:48,200 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 23:37:48,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 23:37:48,202 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 23:37:48,202 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 23:37:48,203 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 23:37:48,203 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 23:37:48,203 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 23:37:48,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 23:37:48,204 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 23:37:48,206 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/config/svcomp-Reach-64bit-Automizer_Default.epf [2019-11-15 23:37:48,229 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 23:37:48,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 23:37:48,240 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 23:37:48,240 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 23:37:48,241 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 23:37:48,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 23:37:48,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 23:37:48,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 23:37:48,242 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 23:37:48,242 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 23:37:48,242 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 23:37:48,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 23:37:48,243 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 23:37:48,243 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 23:37:48,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 23:37:48,244 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 23:37:48,244 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 23:37:48,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 23:37:48,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 23:37:48,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 23:37:48,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 23:37:48,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 23:37:48,246 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 23:37:48,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 23:37:48,246 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 23:37:48,247 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-15 23:37:48,247 INFO L138 SettingsManager]: * To the following directory=dump/ 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_2a304da4-7173-422b-9932-9fe1d2502b4b/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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b5bcbec631d7b9271f7e5e518d6c2fef259d62bf [2019-11-15 23:37:48,278 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 23:37:48,293 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 23:37:48,296 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 23:37:48,298 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 23:37:48,298 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 23:37:48,299 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2019-11-15 23:37:48,358 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/data/dfa46b162/17d369f6715a4e84b2e1760279b75763/FLAG361d94295 [2019-11-15 23:37:49,132 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 23:37:49,134 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2019-11-15 23:37:49,177 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/data/dfa46b162/17d369f6715a4e84b2e1760279b75763/FLAG361d94295 [2019-11-15 23:37:49,676 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/data/dfa46b162/17d369f6715a4e84b2e1760279b75763 [2019-11-15 23:37:49,679 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 23:37:49,680 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 23:37:49,681 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 23:37:49,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 23:37:49,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 23:37:49,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:37:49" (1/1) ... [2019-11-15 23:37:49,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fa6e5ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:37:49, skipping insertion in model container [2019-11-15 23:37:49,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:37:49" (1/1) ... [2019-11-15 23:37:49,698 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 23:37:49,804 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 23:37:51,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:37:51,488 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 23:37:51,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:37:51,913 INFO L192 MainTranslator]: Completed translation [2019-11-15 23:37:51,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:37:51 WrapperNode [2019-11-15 23:37:51,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 23:37:51,915 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 23:37:51,915 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 23:37:51,915 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 23:37:51,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:37:51" (1/1) ... [2019-11-15 23:37:51,995 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:37:51" (1/1) ... [2019-11-15 23:37:52,155 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 23:37:52,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 23:37:52,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 23:37:52,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 23:37:52,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:37:51" (1/1) ... [2019-11-15 23:37:52,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:37:51" (1/1) ... [2019-11-15 23:37:52,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:37:51" (1/1) ... [2019-11-15 23:37:52,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:37:51" (1/1) ... [2019-11-15 23:37:52,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:37:51" (1/1) ... [2019-11-15 23:37:52,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:37:51" (1/1) ... [2019-11-15 23:37:52,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:37:51" (1/1) ... [2019-11-15 23:37:52,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 23:37:52,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 23:37:52,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 23:37:52,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 23:37:52,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:37:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 23:37:52,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2019-11-15 23:37:52,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2019-11-15 23:37:52,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2019-11-15 23:37:52,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-15 23:37:52,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-15 23:37:52,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-15 23:37:52,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-15 23:37:52,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-15 23:37:52,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-15 23:37:52,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-15 23:37:52,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-15 23:37:52,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-15 23:37:52,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2019-11-15 23:37:52,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 23:37:52,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 23:37:58,164 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 23:37:58,164 INFO L284 CfgBuilder]: Removed 739 assume(true) statements. [2019-11-15 23:37:58,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:37:58 BoogieIcfgContainer [2019-11-15 23:37:58,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 23:37:58,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 23:37:58,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 23:37:58,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 23:37:58,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 11:37:49" (1/3) ... [2019-11-15 23:37:58,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3671be68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:37:58, skipping insertion in model container [2019-11-15 23:37:58,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:37:51" (2/3) ... [2019-11-15 23:37:58,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3671be68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:37:58, skipping insertion in model container [2019-11-15 23:37:58,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:37:58" (3/3) ... [2019-11-15 23:37:58,176 INFO L109 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2019-11-15 23:37:58,185 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 23:37:58,194 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 23:37:58,204 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 23:37:58,239 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 23:37:58,239 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 23:37:58,239 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 23:37:58,239 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 23:37:58,240 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 23:37:58,240 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 23:37:58,240 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 23:37:58,240 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 23:37:58,273 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states. [2019-11-15 23:37:58,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-15 23:37:58,286 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:37:58,287 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:37:58,289 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:37:58,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:37:58,294 INFO L82 PathProgramCache]: Analyzing trace with hash 673011410, now seen corresponding path program 1 times [2019-11-15 23:37:58,302 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:37:58,302 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913447038] [2019-11-15 23:37:58,303 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:58,303 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:58,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:37:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:58,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:37:58,830 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913447038] [2019-11-15 23:37:58,831 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:37:58,831 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 23:37:58,831 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30102730] [2019-11-15 23:37:58,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 23:37:58,835 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:37:58,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 23:37:58,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 23:37:58,856 INFO L87 Difference]: Start difference. First operand 865 states. Second operand 3 states. [2019-11-15 23:37:59,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:37:59,019 INFO L93 Difference]: Finished difference Result 2505 states and 3842 transitions. [2019-11-15 23:37:59,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 23:37:59,020 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2019-11-15 23:37:59,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:37:59,043 INFO L225 Difference]: With dead ends: 2505 [2019-11-15 23:37:59,044 INFO L226 Difference]: Without dead ends: 1661 [2019-11-15 23:37:59,050 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 23:37:59,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2019-11-15 23:37:59,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1661. [2019-11-15 23:37:59,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1661 states. [2019-11-15 23:37:59,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 2442 transitions. [2019-11-15 23:37:59,172 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 2442 transitions. Word has length 36 [2019-11-15 23:37:59,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:37:59,173 INFO L462 AbstractCegarLoop]: Abstraction has 1661 states and 2442 transitions. [2019-11-15 23:37:59,173 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 23:37:59,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 2442 transitions. [2019-11-15 23:37:59,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-15 23:37:59,180 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:37:59,181 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:37:59,181 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:37:59,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:37:59,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1068884568, now seen corresponding path program 1 times [2019-11-15 23:37:59,182 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:37:59,182 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350921431] [2019-11-15 23:37:59,182 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:59,182 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:59,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:37:59,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:59,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:37:59,362 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350921431] [2019-11-15 23:37:59,362 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:37:59,362 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 23:37:59,362 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51778302] [2019-11-15 23:37:59,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 23:37:59,364 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:37:59,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 23:37:59,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:37:59,364 INFO L87 Difference]: Start difference. First operand 1661 states and 2442 transitions. Second operand 5 states. [2019-11-15 23:37:59,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:37:59,847 INFO L93 Difference]: Finished difference Result 4915 states and 7239 transitions. [2019-11-15 23:37:59,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 23:37:59,848 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2019-11-15 23:37:59,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:37:59,866 INFO L225 Difference]: With dead ends: 4915 [2019-11-15 23:37:59,866 INFO L226 Difference]: Without dead ends: 3281 [2019-11-15 23:37:59,870 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-15 23:37:59,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3281 states. [2019-11-15 23:37:59,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3281 to 3185. [2019-11-15 23:37:59,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3185 states. [2019-11-15 23:37:59,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3185 states to 3185 states and 4708 transitions. [2019-11-15 23:37:59,953 INFO L78 Accepts]: Start accepts. Automaton has 3185 states and 4708 transitions. Word has length 40 [2019-11-15 23:37:59,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:37:59,953 INFO L462 AbstractCegarLoop]: Abstraction has 3185 states and 4708 transitions. [2019-11-15 23:37:59,953 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 23:37:59,953 INFO L276 IsEmpty]: Start isEmpty. Operand 3185 states and 4708 transitions. [2019-11-15 23:37:59,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-15 23:37:59,958 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:37:59,958 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:37:59,959 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:37:59,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:37:59,959 INFO L82 PathProgramCache]: Analyzing trace with hash 412327029, now seen corresponding path program 1 times [2019-11-15 23:37:59,959 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:37:59,959 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309100788] [2019-11-15 23:37:59,959 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:59,960 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:59,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:37:59,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:38:00,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:38:00,028 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309100788] [2019-11-15 23:38:00,028 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:38:00,028 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 23:38:00,028 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512947352] [2019-11-15 23:38:00,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 23:38:00,029 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:38:00,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 23:38:00,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 23:38:00,029 INFO L87 Difference]: Start difference. First operand 3185 states and 4708 transitions. Second operand 3 states. [2019-11-15 23:38:00,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:38:00,219 INFO L93 Difference]: Finished difference Result 7797 states and 11553 transitions. [2019-11-15 23:38:00,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 23:38:00,222 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2019-11-15 23:38:00,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:38:00,247 INFO L225 Difference]: With dead ends: 7797 [2019-11-15 23:38:00,247 INFO L226 Difference]: Without dead ends: 4645 [2019-11-15 23:38:00,255 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 23:38:00,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4645 states. [2019-11-15 23:38:00,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4645 to 4629. [2019-11-15 23:38:00,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4629 states. [2019-11-15 23:38:00,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 6866 transitions. [2019-11-15 23:38:00,415 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 6866 transitions. Word has length 69 [2019-11-15 23:38:00,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:38:00,415 INFO L462 AbstractCegarLoop]: Abstraction has 4629 states and 6866 transitions. [2019-11-15 23:38:00,415 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 23:38:00,415 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 6866 transitions. [2019-11-15 23:38:00,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-15 23:38:00,419 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:38:00,419 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:38:00,420 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:38:00,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:38:00,420 INFO L82 PathProgramCache]: Analyzing trace with hash 538535924, now seen corresponding path program 1 times [2019-11-15 23:38:00,420 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:38:00,420 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773204895] [2019-11-15 23:38:00,420 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:38:00,421 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:38:00,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:38:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:38:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:38:00,503 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773204895] [2019-11-15 23:38:00,504 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:38:00,504 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 23:38:00,504 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648247369] [2019-11-15 23:38:00,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 23:38:00,506 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:38:00,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 23:38:00,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 23:38:00,507 INFO L87 Difference]: Start difference. First operand 4629 states and 6866 transitions. Second operand 3 states. [2019-11-15 23:38:00,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:38:00,692 INFO L93 Difference]: Finished difference Result 11061 states and 16387 transitions. [2019-11-15 23:38:00,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 23:38:00,692 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2019-11-15 23:38:00,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:38:00,734 INFO L225 Difference]: With dead ends: 11061 [2019-11-15 23:38:00,734 INFO L226 Difference]: Without dead ends: 6465 [2019-11-15 23:38:00,742 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 23:38:00,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6465 states. [2019-11-15 23:38:00,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6465 to 6457. [2019-11-15 23:38:00,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6457 states. [2019-11-15 23:38:00,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6457 states to 6457 states and 9548 transitions. [2019-11-15 23:38:00,974 INFO L78 Accepts]: Start accepts. Automaton has 6457 states and 9548 transitions. Word has length 75 [2019-11-15 23:38:00,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:38:00,975 INFO L462 AbstractCegarLoop]: Abstraction has 6457 states and 9548 transitions. [2019-11-15 23:38:00,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 23:38:00,975 INFO L276 IsEmpty]: Start isEmpty. Operand 6457 states and 9548 transitions. [2019-11-15 23:38:00,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-15 23:38:00,984 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:38:00,985 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:38:00,985 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:38:00,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:38:00,986 INFO L82 PathProgramCache]: Analyzing trace with hash 2077137455, now seen corresponding path program 1 times [2019-11-15 23:38:00,986 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:38:00,986 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294463834] [2019-11-15 23:38:00,986 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:38:00,987 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:38:00,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:38:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:38:01,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:38:01,130 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294463834] [2019-11-15 23:38:01,130 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:38:01,130 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 23:38:01,131 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945422288] [2019-11-15 23:38:01,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 23:38:01,131 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:38:01,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 23:38:01,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 23:38:01,132 INFO L87 Difference]: Start difference. First operand 6457 states and 9548 transitions. Second operand 3 states. [2019-11-15 23:38:01,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:38:01,535 INFO L93 Difference]: Finished difference Result 14597 states and 21691 transitions. [2019-11-15 23:38:01,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 23:38:01,535 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2019-11-15 23:38:01,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:38:01,584 INFO L225 Difference]: With dead ends: 14597 [2019-11-15 23:38:01,584 INFO L226 Difference]: Without dead ends: 8173 [2019-11-15 23:38:01,594 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 23:38:01,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8173 states. [2019-11-15 23:38:01,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8173 to 8157. [2019-11-15 23:38:01,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8157 states. [2019-11-15 23:38:01,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8157 states to 8157 states and 12064 transitions. [2019-11-15 23:38:01,849 INFO L78 Accepts]: Start accepts. Automaton has 8157 states and 12064 transitions. Word has length 83 [2019-11-15 23:38:01,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:38:01,851 INFO L462 AbstractCegarLoop]: Abstraction has 8157 states and 12064 transitions. [2019-11-15 23:38:01,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 23:38:01,851 INFO L276 IsEmpty]: Start isEmpty. Operand 8157 states and 12064 transitions. [2019-11-15 23:38:01,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-11-15 23:38:01,859 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:38:01,860 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:38:01,860 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:38:01,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:38:01,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1002499225, now seen corresponding path program 1 times [2019-11-15 23:38:01,860 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:38:01,861 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932473285] [2019-11-15 23:38:01,861 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:38:01,861 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:38:01,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:38:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:38:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 23:38:01,977 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932473285] [2019-11-15 23:38:01,977 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:38:01,977 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 23:38:01,977 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352329915] [2019-11-15 23:38:01,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 23:38:01,978 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:38:01,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 23:38:01,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 23:38:01,978 INFO L87 Difference]: Start difference. First operand 8157 states and 12064 transitions. Second operand 3 states. [2019-11-15 23:38:02,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:38:02,366 INFO L93 Difference]: Finished difference Result 19699 states and 29208 transitions. [2019-11-15 23:38:02,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 23:38:02,366 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2019-11-15 23:38:02,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:38:02,426 INFO L225 Difference]: With dead ends: 19699 [2019-11-15 23:38:02,427 INFO L226 Difference]: Without dead ends: 15521 [2019-11-15 23:38:02,436 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 23:38:02,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15521 states. [2019-11-15 23:38:02,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15521 to 8269. [2019-11-15 23:38:02,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8269 states. [2019-11-15 23:38:02,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8269 states to 8269 states and 12176 transitions. [2019-11-15 23:38:02,738 INFO L78 Accepts]: Start accepts. Automaton has 8269 states and 12176 transitions. Word has length 84 [2019-11-15 23:38:02,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:38:02,739 INFO L462 AbstractCegarLoop]: Abstraction has 8269 states and 12176 transitions. [2019-11-15 23:38:02,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 23:38:02,739 INFO L276 IsEmpty]: Start isEmpty. Operand 8269 states and 12176 transitions. [2019-11-15 23:38:02,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-15 23:38:02,745 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:38:02,746 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:38:02,746 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:38:02,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:38:02,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1311309048, now seen corresponding path program 1 times [2019-11-15 23:38:02,747 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:38:02,747 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578079050] [2019-11-15 23:38:02,747 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:38:02,747 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:38:02,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:38:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:38:03,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 23:38:03,010 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578079050] [2019-11-15 23:38:03,010 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:38:03,010 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-15 23:38:03,010 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452720702] [2019-11-15 23:38:03,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 23:38:03,011 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:38:03,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 23:38:03,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 23:38:03,012 INFO L87 Difference]: Start difference. First operand 8269 states and 12176 transitions. Second operand 4 states. [2019-11-15 23:38:03,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:38:03,550 INFO L93 Difference]: Finished difference Result 19915 states and 29351 transitions. [2019-11-15 23:38:03,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 23:38:03,551 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 86 [2019-11-15 23:38:03,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:38:03,578 INFO L225 Difference]: With dead ends: 19915 [2019-11-15 23:38:03,578 INFO L226 Difference]: Without dead ends: 11679 [2019-11-15 23:38:03,591 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 23:38:03,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11679 states. [2019-11-15 23:38:03,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11679 to 8101. [2019-11-15 23:38:03,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8101 states. [2019-11-15 23:38:03,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8101 states to 8101 states and 11840 transitions. [2019-11-15 23:38:03,873 INFO L78 Accepts]: Start accepts. Automaton has 8101 states and 11840 transitions. Word has length 86 [2019-11-15 23:38:03,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:38:03,874 INFO L462 AbstractCegarLoop]: Abstraction has 8101 states and 11840 transitions. [2019-11-15 23:38:03,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 23:38:03,874 INFO L276 IsEmpty]: Start isEmpty. Operand 8101 states and 11840 transitions. [2019-11-15 23:38:03,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-15 23:38:03,884 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:38:03,885 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:38:03,885 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:38:03,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:38:03,885 INFO L82 PathProgramCache]: Analyzing trace with hash 328545236, now seen corresponding path program 1 times [2019-11-15 23:38:03,886 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:38:03,886 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492647909] [2019-11-15 23:38:03,886 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:38:03,886 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:38:03,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:38:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:38:04,008 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-15 23:38:04,009 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492647909] [2019-11-15 23:38:04,009 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:38:04,009 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-15 23:38:04,009 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799039241] [2019-11-15 23:38:04,010 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 23:38:04,010 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:38:04,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 23:38:04,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-15 23:38:04,011 INFO L87 Difference]: Start difference. First operand 8101 states and 11840 transitions. Second operand 4 states. [2019-11-15 23:38:04,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:38:04,339 INFO L93 Difference]: Finished difference Result 18801 states and 27402 transitions. [2019-11-15 23:38:04,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 23:38:04,340 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2019-11-15 23:38:04,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:38:04,363 INFO L225 Difference]: With dead ends: 18801 [2019-11-15 23:38:04,363 INFO L226 Difference]: Without dead ends: 10733 [2019-11-15 23:38:04,375 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:38:04,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10733 states. [2019-11-15 23:38:04,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10733 to 8117. [2019-11-15 23:38:04,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8117 states. [2019-11-15 23:38:04,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8117 states to 8117 states and 11856 transitions. [2019-11-15 23:38:04,702 INFO L78 Accepts]: Start accepts. Automaton has 8117 states and 11856 transitions. Word has length 119 [2019-11-15 23:38:04,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:38:04,702 INFO L462 AbstractCegarLoop]: Abstraction has 8117 states and 11856 transitions. [2019-11-15 23:38:04,702 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 23:38:04,702 INFO L276 IsEmpty]: Start isEmpty. Operand 8117 states and 11856 transitions. [2019-11-15 23:38:04,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-15 23:38:04,713 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:38:04,713 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:38:04,714 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:38:04,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:38:04,714 INFO L82 PathProgramCache]: Analyzing trace with hash 374234435, now seen corresponding path program 1 times [2019-11-15 23:38:04,715 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:38:04,715 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387438718] [2019-11-15 23:38:04,715 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:38:04,715 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:38:04,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:38:04,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:38:04,858 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-15 23:38:04,858 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387438718] [2019-11-15 23:38:04,859 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:38:04,859 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-15 23:38:04,859 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705540591] [2019-11-15 23:38:04,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 23:38:04,860 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:38:04,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 23:38:04,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-15 23:38:04,861 INFO L87 Difference]: Start difference. First operand 8117 states and 11856 transitions. Second operand 4 states. [2019-11-15 23:38:06,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:38:06,026 INFO L93 Difference]: Finished difference Result 40192 states and 58731 transitions. [2019-11-15 23:38:06,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 23:38:06,027 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2019-11-15 23:38:06,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:38:06,084 INFO L225 Difference]: With dead ends: 40192 [2019-11-15 23:38:06,084 INFO L226 Difference]: Without dead ends: 32108 [2019-11-15 23:38:06,100 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:38:06,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32108 states. [2019-11-15 23:38:06,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32108 to 8133. [2019-11-15 23:38:06,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8133 states. [2019-11-15 23:38:06,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8133 states to 8133 states and 11872 transitions. [2019-11-15 23:38:06,757 INFO L78 Accepts]: Start accepts. Automaton has 8133 states and 11872 transitions. Word has length 126 [2019-11-15 23:38:06,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:38:06,758 INFO L462 AbstractCegarLoop]: Abstraction has 8133 states and 11872 transitions. [2019-11-15 23:38:06,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 23:38:06,758 INFO L276 IsEmpty]: Start isEmpty. Operand 8133 states and 11872 transitions. [2019-11-15 23:38:06,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-15 23:38:06,771 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:38:06,771 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:38:06,772 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:38:06,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:38:06,774 INFO L82 PathProgramCache]: Analyzing trace with hash -17513261, now seen corresponding path program 1 times [2019-11-15 23:38:06,774 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:38:06,775 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558862050] [2019-11-15 23:38:06,775 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:38:06,775 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:38:06,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:38:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:38:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-15 23:38:06,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558862050] [2019-11-15 23:38:06,969 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:38:06,969 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 23:38:06,970 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614245392] [2019-11-15 23:38:06,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 23:38:06,970 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:38:06,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 23:38:06,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:38:06,971 INFO L87 Difference]: Start difference. First operand 8133 states and 11872 transitions. Second operand 5 states. [2019-11-15 23:38:07,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:38:07,693 INFO L93 Difference]: Finished difference Result 21289 states and 30983 transitions. [2019-11-15 23:38:07,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-15 23:38:07,694 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 127 [2019-11-15 23:38:07,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:38:07,717 INFO L225 Difference]: With dead ends: 21289 [2019-11-15 23:38:07,717 INFO L226 Difference]: Without dead ends: 13189 [2019-11-15 23:38:07,731 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-15 23:38:07,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13189 states. [2019-11-15 23:38:08,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13189 to 8141. [2019-11-15 23:38:08,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8141 states. [2019-11-15 23:38:08,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8141 states to 8141 states and 11880 transitions. [2019-11-15 23:38:08,136 INFO L78 Accepts]: Start accepts. Automaton has 8141 states and 11880 transitions. Word has length 127 [2019-11-15 23:38:08,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:38:08,137 INFO L462 AbstractCegarLoop]: Abstraction has 8141 states and 11880 transitions. [2019-11-15 23:38:08,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 23:38:08,137 INFO L276 IsEmpty]: Start isEmpty. Operand 8141 states and 11880 transitions. [2019-11-15 23:38:08,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-15 23:38:08,146 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:38:08,146 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:38:08,147 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:38:08,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:38:08,147 INFO L82 PathProgramCache]: Analyzing trace with hash 836676706, now seen corresponding path program 1 times [2019-11-15 23:38:08,147 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:38:08,147 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662124] [2019-11-15 23:38:08,148 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:38:08,148 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:38:08,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:38:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:38:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-15 23:38:08,489 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662124] [2019-11-15 23:38:08,489 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:38:08,489 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-15 23:38:08,490 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698092153] [2019-11-15 23:38:08,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 23:38:08,491 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:38:08,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 23:38:08,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-15 23:38:08,491 INFO L87 Difference]: Start difference. First operand 8141 states and 11880 transitions. Second operand 7 states. [2019-11-15 23:38:11,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:38:11,562 INFO L93 Difference]: Finished difference Result 21137 states and 30807 transitions. [2019-11-15 23:38:11,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 23:38:11,562 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 142 [2019-11-15 23:38:11,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:38:11,577 INFO L225 Difference]: With dead ends: 21137 [2019-11-15 23:38:11,577 INFO L226 Difference]: Without dead ends: 13029 [2019-11-15 23:38:11,586 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2019-11-15 23:38:11,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13029 states. [2019-11-15 23:38:11,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13029 to 8181. [2019-11-15 23:38:11,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8181 states. [2019-11-15 23:38:11,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8181 states to 8181 states and 11920 transitions. [2019-11-15 23:38:11,879 INFO L78 Accepts]: Start accepts. Automaton has 8181 states and 11920 transitions. Word has length 142 [2019-11-15 23:38:11,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:38:11,880 INFO L462 AbstractCegarLoop]: Abstraction has 8181 states and 11920 transitions. [2019-11-15 23:38:11,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 23:38:11,880 INFO L276 IsEmpty]: Start isEmpty. Operand 8181 states and 11920 transitions. [2019-11-15 23:38:11,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-15 23:38:11,888 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:38:11,888 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:38:11,889 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:38:11,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:38:11,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1581227360, now seen corresponding path program 1 times [2019-11-15 23:38:11,889 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:38:11,889 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110341953] [2019-11-15 23:38:11,890 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:38:11,890 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:38:11,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:38:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:38:12,184 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-15 23:38:12,185 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110341953] [2019-11-15 23:38:12,185 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:38:12,185 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-15 23:38:12,185 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804426396] [2019-11-15 23:38:12,186 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 23:38:12,186 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:38:12,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 23:38:12,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-15 23:38:12,186 INFO L87 Difference]: Start difference. First operand 8181 states and 11920 transitions. Second operand 7 states. [2019-11-15 23:38:14,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:38:14,315 INFO L93 Difference]: Finished difference Result 53582 states and 77934 transitions. [2019-11-15 23:38:14,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-15 23:38:14,316 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 142 [2019-11-15 23:38:14,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:38:14,362 INFO L225 Difference]: With dead ends: 53582 [2019-11-15 23:38:14,362 INFO L226 Difference]: Without dead ends: 45434 [2019-11-15 23:38:14,382 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2019-11-15 23:38:14,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45434 states. [2019-11-15 23:38:15,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45434 to 16322. [2019-11-15 23:38:15,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16322 states. [2019-11-15 23:38:15,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16322 states to 16322 states and 23755 transitions. [2019-11-15 23:38:15,390 INFO L78 Accepts]: Start accepts. Automaton has 16322 states and 23755 transitions. Word has length 142 [2019-11-15 23:38:15,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:38:15,390 INFO L462 AbstractCegarLoop]: Abstraction has 16322 states and 23755 transitions. [2019-11-15 23:38:15,390 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 23:38:15,390 INFO L276 IsEmpty]: Start isEmpty. Operand 16322 states and 23755 transitions. [2019-11-15 23:38:15,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-15 23:38:15,406 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:38:15,406 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:38:15,407 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:38:15,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:38:15,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1341932638, now seen corresponding path program 1 times [2019-11-15 23:38:15,407 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:38:15,408 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052752836] [2019-11-15 23:38:15,408 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:38:15,408 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:38:15,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:38:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:38:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-15 23:38:15,628 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052752836] [2019-11-15 23:38:15,628 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828902767] [2019-11-15 23:38:15,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:38:16,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:38:16,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 1506 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 23:38:16,235 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:38:16,302 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-15 23:38:16,302 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 23:38:16,303 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2019-11-15 23:38:16,303 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961497144] [2019-11-15 23:38:16,303 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 23:38:16,303 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:38:16,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 23:38:16,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:38:16,305 INFO L87 Difference]: Start difference. First operand 16322 states and 23755 transitions. Second operand 4 states. [2019-11-15 23:38:17,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:38:17,772 INFO L93 Difference]: Finished difference Result 21721 states and 31433 transitions. [2019-11-15 23:38:17,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 23:38:17,773 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 142 [2019-11-15 23:38:17,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:38:17,814 INFO L225 Difference]: With dead ends: 21721 [2019-11-15 23:38:17,814 INFO L226 Difference]: Without dead ends: 21713 [2019-11-15 23:38:17,821 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:38:17,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21713 states. [2019-11-15 23:38:19,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21713 to 19134. [2019-11-15 23:38:19,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19134 states. [2019-11-15 23:38:19,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19134 states to 19134 states and 27773 transitions. [2019-11-15 23:38:19,023 INFO L78 Accepts]: Start accepts. Automaton has 19134 states and 27773 transitions. Word has length 142 [2019-11-15 23:38:19,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:38:19,023 INFO L462 AbstractCegarLoop]: Abstraction has 19134 states and 27773 transitions. [2019-11-15 23:38:19,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 23:38:19,023 INFO L276 IsEmpty]: Start isEmpty. Operand 19134 states and 27773 transitions. [2019-11-15 23:38:19,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-15 23:38:19,037 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:38:19,037 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:38:19,242 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:38:19,242 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:38:19,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:38:19,243 INFO L82 PathProgramCache]: Analyzing trace with hash -593533644, now seen corresponding path program 1 times [2019-11-15 23:38:19,243 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:38:19,243 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101598649] [2019-11-15 23:38:19,243 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:38:19,243 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:38:19,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:38:19,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:38:19,457 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-15 23:38:19,457 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101598649] [2019-11-15 23:38:19,457 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:38:19,457 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 23:38:19,458 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347503522] [2019-11-15 23:38:19,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 23:38:19,459 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:38:19,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 23:38:19,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 23:38:19,459 INFO L87 Difference]: Start difference. First operand 19134 states and 27773 transitions. Second operand 3 states. [2019-11-15 23:38:20,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:38:20,226 INFO L93 Difference]: Finished difference Result 28630 states and 41585 transitions. [2019-11-15 23:38:20,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 23:38:20,227 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 146 [2019-11-15 23:38:20,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:38:20,241 INFO L225 Difference]: With dead ends: 28630 [2019-11-15 23:38:20,242 INFO L226 Difference]: Without dead ends: 8062 [2019-11-15 23:38:20,255 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 23:38:20,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8062 states. [2019-11-15 23:38:20,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8062 to 8062. [2019-11-15 23:38:20,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8062 states. [2019-11-15 23:38:20,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8062 states to 8062 states and 11629 transitions. [2019-11-15 23:38:20,812 INFO L78 Accepts]: Start accepts. Automaton has 8062 states and 11629 transitions. Word has length 146 [2019-11-15 23:38:20,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:38:20,812 INFO L462 AbstractCegarLoop]: Abstraction has 8062 states and 11629 transitions. [2019-11-15 23:38:20,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 23:38:20,812 INFO L276 IsEmpty]: Start isEmpty. Operand 8062 states and 11629 transitions. [2019-11-15 23:38:20,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-15 23:38:20,820 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:38:20,821 INFO L380 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:38:20,821 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:38:20,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:38:20,822 INFO L82 PathProgramCache]: Analyzing trace with hash 77015379, now seen corresponding path program 1 times [2019-11-15 23:38:20,822 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:38:20,822 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311692435] [2019-11-15 23:38:20,822 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:38:20,822 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:38:20,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:38:21,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:38:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-15 23:38:21,438 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311692435] [2019-11-15 23:38:21,439 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:38:21,439 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-15 23:38:21,439 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762613698] [2019-11-15 23:38:21,441 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 23:38:21,441 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:38:21,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 23:38:21,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-15 23:38:21,442 INFO L87 Difference]: Start difference. First operand 8062 states and 11629 transitions. Second operand 8 states. [2019-11-15 23:38:23,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:38:23,844 INFO L93 Difference]: Finished difference Result 34718 states and 50115 transitions. [2019-11-15 23:38:23,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-15 23:38:23,844 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 154 [2019-11-15 23:38:23,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:38:23,874 INFO L225 Difference]: With dead ends: 34718 [2019-11-15 23:38:23,875 INFO L226 Difference]: Without dead ends: 26764 [2019-11-15 23:38:23,888 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2019-11-15 23:38:23,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26764 states. [2019-11-15 23:38:24,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26764 to 8086. [2019-11-15 23:38:24,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8086 states. [2019-11-15 23:38:24,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8086 states to 8086 states and 11645 transitions. [2019-11-15 23:38:24,585 INFO L78 Accepts]: Start accepts. Automaton has 8086 states and 11645 transitions. Word has length 154 [2019-11-15 23:38:24,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:38:24,585 INFO L462 AbstractCegarLoop]: Abstraction has 8086 states and 11645 transitions. [2019-11-15 23:38:24,585 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 23:38:24,585 INFO L276 IsEmpty]: Start isEmpty. Operand 8086 states and 11645 transitions. [2019-11-15 23:38:24,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-11-15 23:38:24,591 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:38:24,592 INFO L380 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:38:24,592 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:38:24,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:38:24,592 INFO L82 PathProgramCache]: Analyzing trace with hash 165774978, now seen corresponding path program 1 times [2019-11-15 23:38:24,593 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:38:24,593 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656604891] [2019-11-15 23:38:24,593 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:38:24,593 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:38:24,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:38:24,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:38:25,211 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:1305) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.SmtUtils.termWithLocalSimplification(SmtUtils.java:1186) 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.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.computePredicates(NestedInterpolantsBuilder.java:574) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:172) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:305) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:207) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:109) 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.TraceAbstractionRefinementEngine.checkFeasibility(TraceAbstractionRefinementEngine.java:244) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-15 23:38:25,215 INFO L168 Benchmark]: Toolchain (without parser) took 35534.80 ms. Allocated memory was 1.0 GB in the beginning and 3.5 GB in the end (delta: 2.5 GB). Free memory was 939.3 MB in the beginning and 3.2 GB in the end (delta: -2.3 GB). Peak memory consumption was 199.7 MB. Max. memory is 11.5 GB. [2019-11-15 23:38:25,216 INFO L168 Benchmark]: CDTParser took 0.46 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. [2019-11-15 23:38:25,216 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2233.78 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.4 MB). Free memory was 939.3 MB in the beginning and 995.0 MB in the end (delta: -55.6 MB). Peak memory consumption was 109.3 MB. Max. memory is 11.5 GB. [2019-11-15 23:38:25,217 INFO L168 Benchmark]: Boogie Procedure Inliner took 240.64 ms. Allocated memory is still 1.2 GB. Free memory was 995.0 MB in the beginning and 967.9 MB in the end (delta: 27.1 MB). Peak memory consumption was 27.1 MB. Max. memory is 11.5 GB. [2019-11-15 23:38:25,217 INFO L168 Benchmark]: Boogie Preprocessor took 241.12 ms. Allocated memory is still 1.2 GB. Free memory was 967.9 MB in the beginning and 947.6 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 11.5 GB. [2019-11-15 23:38:25,218 INFO L168 Benchmark]: RCFGBuilder took 5768.43 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 133.2 MB). Free memory was 947.6 MB in the beginning and 821.4 MB in the end (delta: 126.2 MB). Peak memory consumption was 259.3 MB. Max. memory is 11.5 GB. [2019-11-15 23:38:25,218 INFO L168 Benchmark]: TraceAbstraction took 27046.86 ms. Allocated memory was 1.3 GB in the beginning and 3.5 GB in the end (delta: 2.2 GB). Free memory was 821.4 MB in the beginning and 3.2 GB in the end (delta: -2.4 GB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:38:25,221 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 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 2233.78 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.4 MB). Free memory was 939.3 MB in the beginning and 995.0 MB in the end (delta: -55.6 MB). Peak memory consumption was 109.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 240.64 ms. Allocated memory is still 1.2 GB. Free memory was 995.0 MB in the beginning and 967.9 MB in the end (delta: 27.1 MB). Peak memory consumption was 27.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 241.12 ms. Allocated memory is still 1.2 GB. Free memory was 967.9 MB in the beginning and 947.6 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 5768.43 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 133.2 MB). Free memory was 947.6 MB in the beginning and 821.4 MB in the end (delta: 126.2 MB). Peak memory consumption was 259.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 27046.86 ms. Allocated memory was 1.3 GB in the beginning and 3.5 GB in the end (delta: 2.2 GB). Free memory was 821.4 MB in the beginning and 3.2 GB in the end (delta: -2.4 GB). There was no memory consumed. 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-cad4683 [2019-11-15 23:38:27,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 23:38:27,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 23:38:27,605 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 23:38:27,605 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 23:38:27,606 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 23:38:27,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 23:38:27,610 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 23:38:27,611 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 23:38:27,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 23:38:27,613 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 23:38:27,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 23:38:27,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 23:38:27,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 23:38:27,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 23:38:27,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 23:38:27,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 23:38:27,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 23:38:27,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 23:38:27,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 23:38:27,625 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 23:38:27,626 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 23:38:27,627 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 23:38:27,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 23:38:27,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 23:38:27,631 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 23:38:27,631 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 23:38:27,632 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 23:38:27,633 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 23:38:27,634 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 23:38:27,634 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 23:38:27,635 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 23:38:27,635 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 23:38:27,636 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 23:38:27,637 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 23:38:27,637 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 23:38:27,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 23:38:27,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 23:38:27,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 23:38:27,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 23:38:27,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 23:38:27,641 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2019-11-15 23:38:27,655 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 23:38:27,656 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 23:38:27,657 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 23:38:27,657 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 23:38:27,657 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 23:38:27,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 23:38:27,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 23:38:27,658 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 23:38:27,658 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 23:38:27,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 23:38:27,659 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-15 23:38:27,659 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-15 23:38:27,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 23:38:27,659 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 23:38:27,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 23:38:27,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 23:38:27,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 23:38:27,660 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 23:38:27,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 23:38:27,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 23:38:27,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 23:38:27,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 23:38:27,662 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 23:38:27,662 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-15 23:38:27,662 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-15 23:38:27,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 23:38:27,662 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-15 23:38:27,663 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2019-11-15 23:38:27,663 INFO L138 SettingsManager]: * To the following directory=dump/ 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_2a304da4-7173-422b-9932-9fe1d2502b4b/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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b5bcbec631d7b9271f7e5e518d6c2fef259d62bf [2019-11-15 23:38:27,693 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 23:38:27,704 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 23:38:27,707 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 23:38:27,709 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 23:38:27,709 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 23:38:27,710 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2019-11-15 23:38:27,763 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/data/330368cba/0b2b99274ae848fdb3d6df59dbca9b69/FLAGac737057b [2019-11-15 23:38:28,451 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 23:38:28,452 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2019-11-15 23:38:28,495 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/data/330368cba/0b2b99274ae848fdb3d6df59dbca9b69/FLAGac737057b [2019-11-15 23:38:28,515 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/data/330368cba/0b2b99274ae848fdb3d6df59dbca9b69 [2019-11-15 23:38:28,517 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 23:38:28,519 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 23:38:28,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 23:38:28,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 23:38:28,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 23:38:28,523 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:38:28" (1/1) ... [2019-11-15 23:38:28,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@290335f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:38:28, skipping insertion in model container [2019-11-15 23:38:28,526 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:38:28" (1/1) ... [2019-11-15 23:38:28,532 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 23:38:28,640 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 23:38:30,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:38:30,310 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 23:38:30,598 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:38:30,817 INFO L192 MainTranslator]: Completed translation [2019-11-15 23:38:30,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:38:30 WrapperNode [2019-11-15 23:38:30,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 23:38:30,818 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 23:38:30,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 23:38:30,819 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 23:38:30,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:38:30" (1/1) ... [2019-11-15 23:38:30,897 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:38:30" (1/1) ... [2019-11-15 23:38:31,086 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 23:38:31,087 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 23:38:31,087 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 23:38:31,087 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 23:38:31,100 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:38:30" (1/1) ... [2019-11-15 23:38:31,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:38:30" (1/1) ... [2019-11-15 23:38:31,126 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:38:30" (1/1) ... [2019-11-15 23:38:31,126 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:38:30" (1/1) ... [2019-11-15 23:38:31,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:38:30" (1/1) ... [2019-11-15 23:38:31,259 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:38:30" (1/1) ... [2019-11-15 23:38:31,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:38:30" (1/1) ... [2019-11-15 23:38:31,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 23:38:31,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 23:38:31,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 23:38:31,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 23:38:31,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:38:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 23:38:31,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2019-11-15 23:38:31,375 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2019-11-15 23:38:31,375 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-15 23:38:31,375 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2019-11-15 23:38:31,375 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2019-11-15 23:38:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2019-11-15 23:38:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2019-11-15 23:38:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2019-11-15 23:38:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2019-11-15 23:38:31,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2019-11-15 23:38:31,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-15 23:38:31,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-15 23:38:31,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-15 23:38:31,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2019-11-15 23:38:31,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2019-11-15 23:38:31,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2019-11-15 23:38:31,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-15 23:38:31,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2019-11-15 23:38:31,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2019-11-15 23:38:31,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2019-11-15 23:38:31,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-15 23:38:31,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-15 23:38:31,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-15 23:38:31,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2019-11-15 23:38:31,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2019-11-15 23:38:31,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2019-11-15 23:38:31,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2019-11-15 23:38:31,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 23:38:31,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 23:38:41,717 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 23:38:41,718 INFO L284 CfgBuilder]: Removed 739 assume(true) statements. [2019-11-15 23:38:41,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:38:41 BoogieIcfgContainer [2019-11-15 23:38:41,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 23:38:41,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 23:38:41,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 23:38:41,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 23:38:41,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 11:38:28" (1/3) ... [2019-11-15 23:38:41,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@295d406b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:38:41, skipping insertion in model container [2019-11-15 23:38:41,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:38:30" (2/3) ... [2019-11-15 23:38:41,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@295d406b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:38:41, skipping insertion in model container [2019-11-15 23:38:41,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:38:41" (3/3) ... [2019-11-15 23:38:41,729 INFO L109 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2019-11-15 23:38:41,739 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 23:38:41,748 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 23:38:41,758 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 23:38:41,794 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 23:38:41,794 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 23:38:41,794 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 23:38:41,794 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 23:38:41,794 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 23:38:41,795 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 23:38:41,795 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 23:38:41,795 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 23:38:41,948 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states. [2019-11-15 23:38:41,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-15 23:38:41,961 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:38:41,962 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:38:41,964 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:38:41,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:38:41,977 INFO L82 PathProgramCache]: Analyzing trace with hash 673011410, now seen corresponding path program 1 times [2019-11-15 23:38:41,989 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:38:41,989 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [981953774] [2019-11-15 23:38:41,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:38:42,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:38:42,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-15 23:38:42,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:38:42,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:38:42,579 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:38:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:38:42,599 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [981953774] [2019-11-15 23:38:42,600 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:38:42,600 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-15 23:38:42,600 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30404797] [2019-11-15 23:38:42,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 23:38:42,606 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:38:42,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 23:38:42,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 23:38:42,621 INFO L87 Difference]: Start difference. First operand 865 states. Second operand 4 states. [2019-11-15 23:38:42,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:38:42,995 INFO L93 Difference]: Finished difference Result 3312 states and 5087 transitions. [2019-11-15 23:38:42,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 23:38:42,997 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2019-11-15 23:38:42,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:38:43,035 INFO L225 Difference]: With dead ends: 3312 [2019-11-15 23:38:43,035 INFO L226 Difference]: Without dead ends: 2464 [2019-11-15 23:38:43,047 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 23:38:43,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2464 states. [2019-11-15 23:38:43,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2464 to 2464. [2019-11-15 23:38:43,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2464 states. [2019-11-15 23:38:43,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 3628 transitions. [2019-11-15 23:38:43,260 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 3628 transitions. Word has length 36 [2019-11-15 23:38:43,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:38:43,261 INFO L462 AbstractCegarLoop]: Abstraction has 2464 states and 3628 transitions. [2019-11-15 23:38:43,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 23:38:43,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 3628 transitions. [2019-11-15 23:38:43,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-15 23:38:43,270 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:38:43,270 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:38:43,477 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:38:43,478 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:38:43,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:38:43,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1068884568, now seen corresponding path program 1 times [2019-11-15 23:38:43,479 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:38:43,479 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2128773884] [2019-11-15 23:38:43,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:38:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:38:44,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 23:38:44,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:38:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:38:44,054 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:38:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:38:44,077 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2128773884] [2019-11-15 23:38:44,077 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:38:44,078 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-11-15 23:38:44,078 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77328883] [2019-11-15 23:38:44,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 23:38:44,080 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:38:44,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 23:38:44,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-15 23:38:44,081 INFO L87 Difference]: Start difference. First operand 2464 states and 3628 transitions. Second operand 7 states. [2019-11-15 23:38:44,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:38:44,966 INFO L93 Difference]: Finished difference Result 7324 states and 10797 transitions. [2019-11-15 23:38:44,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 23:38:44,967 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2019-11-15 23:38:44,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:38:45,000 INFO L225 Difference]: With dead ends: 7324 [2019-11-15 23:38:45,000 INFO L226 Difference]: Without dead ends: 4887 [2019-11-15 23:38:45,006 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-15 23:38:45,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4887 states. [2019-11-15 23:38:45,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4887 to 4743. [2019-11-15 23:38:45,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4743 states. [2019-11-15 23:38:45,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4743 states to 4743 states and 7019 transitions. [2019-11-15 23:38:45,227 INFO L78 Accepts]: Start accepts. Automaton has 4743 states and 7019 transitions. Word has length 40 [2019-11-15 23:38:45,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:38:45,228 INFO L462 AbstractCegarLoop]: Abstraction has 4743 states and 7019 transitions. [2019-11-15 23:38:45,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 23:38:45,228 INFO L276 IsEmpty]: Start isEmpty. Operand 4743 states and 7019 transitions. [2019-11-15 23:38:45,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-15 23:38:45,244 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:38:45,244 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:38:45,450 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:38:45,453 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:38:45,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:38:45,454 INFO L82 PathProgramCache]: Analyzing trace with hash 412327029, now seen corresponding path program 1 times [2019-11-15 23:38:45,455 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:38:45,455 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1903538343] [2019-11-15 23:38:45,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:38:46,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:38:46,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-15 23:38:46,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:38:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:38:46,183 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:38:46,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:38:46,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1903538343] [2019-11-15 23:38:46,193 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:38:46,193 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-15 23:38:46,193 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522400926] [2019-11-15 23:38:46,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 23:38:46,194 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:38:46,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 23:38:46,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 23:38:46,201 INFO L87 Difference]: Start difference. First operand 4743 states and 7019 transitions. Second operand 3 states. [2019-11-15 23:38:46,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:38:46,608 INFO L93 Difference]: Finished difference Result 11629 states and 17249 transitions. [2019-11-15 23:38:46,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 23:38:46,609 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2019-11-15 23:38:46,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:38:46,648 INFO L225 Difference]: With dead ends: 11629 [2019-11-15 23:38:46,649 INFO L226 Difference]: Without dead ends: 6919 [2019-11-15 23:38:46,659 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 23:38:46,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6919 states. [2019-11-15 23:38:46,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6919 to 6903. [2019-11-15 23:38:46,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6903 states. [2019-11-15 23:38:46,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6903 states to 6903 states and 10249 transitions. [2019-11-15 23:38:46,899 INFO L78 Accepts]: Start accepts. Automaton has 6903 states and 10249 transitions. Word has length 69 [2019-11-15 23:38:46,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:38:46,900 INFO L462 AbstractCegarLoop]: Abstraction has 6903 states and 10249 transitions. [2019-11-15 23:38:46,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 23:38:46,900 INFO L276 IsEmpty]: Start isEmpty. Operand 6903 states and 10249 transitions. [2019-11-15 23:38:46,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-15 23:38:46,906 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:38:46,906 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:38:47,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:38:47,121 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:38:47,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:38:47,121 INFO L82 PathProgramCache]: Analyzing trace with hash 538535924, now seen corresponding path program 1 times [2019-11-15 23:38:47,122 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:38:47,123 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1192467315] [2019-11-15 23:38:47,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:38:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:38:47,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-15 23:38:47,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:38:47,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:38:47,794 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:38:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:38:47,811 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1192467315] [2019-11-15 23:38:47,811 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:38:47,812 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-15 23:38:47,812 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141314842] [2019-11-15 23:38:47,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 23:38:47,813 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:38:47,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 23:38:47,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 23:38:47,815 INFO L87 Difference]: Start difference. First operand 6903 states and 10249 transitions. Second operand 3 states. [2019-11-15 23:38:48,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:38:48,227 INFO L93 Difference]: Finished difference Result 16511 states and 24484 transitions. [2019-11-15 23:38:48,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 23:38:48,227 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2019-11-15 23:38:48,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:38:48,294 INFO L225 Difference]: With dead ends: 16511 [2019-11-15 23:38:48,294 INFO L226 Difference]: Without dead ends: 9641 [2019-11-15 23:38:48,306 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 23:38:48,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9641 states. [2019-11-15 23:38:48,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9641 to 9618. [2019-11-15 23:38:48,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9618 states. [2019-11-15 23:38:48,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9618 states to 9618 states and 14236 transitions. [2019-11-15 23:38:48,865 INFO L78 Accepts]: Start accepts. Automaton has 9618 states and 14236 transitions. Word has length 75 [2019-11-15 23:38:48,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:38:48,866 INFO L462 AbstractCegarLoop]: Abstraction has 9618 states and 14236 transitions. [2019-11-15 23:38:48,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 23:38:48,866 INFO L276 IsEmpty]: Start isEmpty. Operand 9618 states and 14236 transitions. [2019-11-15 23:38:48,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-15 23:38:48,878 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:38:48,878 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:38:49,088 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:38:49,088 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:38:49,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:38:49,088 INFO L82 PathProgramCache]: Analyzing trace with hash 2077137455, now seen corresponding path program 1 times [2019-11-15 23:38:49,089 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:38:49,089 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1369989728] [2019-11-15 23:38:49,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:38:49,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:38:49,844 INFO L256 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-15 23:38:49,847 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:38:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 23:38:49,863 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:38:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 23:38:49,869 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1369989728] [2019-11-15 23:38:49,870 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:38:49,873 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-15 23:38:49,874 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677306099] [2019-11-15 23:38:49,874 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 23:38:49,874 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:38:49,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 23:38:49,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 23:38:49,875 INFO L87 Difference]: Start difference. First operand 9618 states and 14236 transitions. Second operand 3 states. [2019-11-15 23:38:50,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:38:50,646 INFO L93 Difference]: Finished difference Result 23173 states and 34390 transitions. [2019-11-15 23:38:50,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 23:38:50,647 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2019-11-15 23:38:50,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:38:50,732 INFO L225 Difference]: With dead ends: 23173 [2019-11-15 23:38:50,733 INFO L226 Difference]: Without dead ends: 18225 [2019-11-15 23:38:50,746 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 23:38:50,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18225 states. [2019-11-15 23:38:51,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18225 to 9762. [2019-11-15 23:38:51,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9762 states. [2019-11-15 23:38:51,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9762 states to 9762 states and 14380 transitions. [2019-11-15 23:38:51,518 INFO L78 Accepts]: Start accepts. Automaton has 9762 states and 14380 transitions. Word has length 83 [2019-11-15 23:38:51,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:38:51,520 INFO L462 AbstractCegarLoop]: Abstraction has 9762 states and 14380 transitions. [2019-11-15 23:38:51,521 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 23:38:51,521 INFO L276 IsEmpty]: Start isEmpty. Operand 9762 states and 14380 transitions. [2019-11-15 23:38:51,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-15 23:38:51,533 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:38:51,534 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:38:51,740 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:38:51,740 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:38:51,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:38:51,741 INFO L82 PathProgramCache]: Analyzing trace with hash 141437520, now seen corresponding path program 1 times [2019-11-15 23:38:51,742 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:38:51,742 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1526939591] [2019-11-15 23:38:51,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:38:52,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:38:52,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 23:38:52,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:38:52,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 23:38:52,375 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:38:52,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 23:38:52,387 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1526939591] [2019-11-15 23:38:52,387 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:38:52,388 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-15 23:38:52,388 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394993845] [2019-11-15 23:38:52,388 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 23:38:52,388 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:38:52,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 23:38:52,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:38:52,389 INFO L87 Difference]: Start difference. First operand 9762 states and 14380 transitions. Second operand 5 states. [2019-11-15 23:38:52,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:38:52,750 INFO L93 Difference]: Finished difference Result 16324 states and 24047 transitions. [2019-11-15 23:38:52,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 23:38:52,751 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2019-11-15 23:38:52,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:38:52,773 INFO L225 Difference]: With dead ends: 16324 [2019-11-15 23:38:52,773 INFO L226 Difference]: Without dead ends: 6575 [2019-11-15 23:38:52,786 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-15 23:38:52,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6575 states. [2019-11-15 23:38:53,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6575 to 6519. [2019-11-15 23:38:53,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6519 states. [2019-11-15 23:38:53,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6519 states to 6519 states and 9606 transitions. [2019-11-15 23:38:53,016 INFO L78 Accepts]: Start accepts. Automaton has 6519 states and 9606 transitions. Word has length 85 [2019-11-15 23:38:53,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:38:53,017 INFO L462 AbstractCegarLoop]: Abstraction has 6519 states and 9606 transitions. [2019-11-15 23:38:53,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 23:38:53,017 INFO L276 IsEmpty]: Start isEmpty. Operand 6519 states and 9606 transitions. [2019-11-15 23:38:53,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-15 23:38:53,038 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:38:53,038 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:38:53,244 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:38:53,245 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:38:53,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:38:53,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1017456526, now seen corresponding path program 1 times [2019-11-15 23:38:53,246 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:38:53,247 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1744237783] [2019-11-15 23:38:53,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:38:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:38:53,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-15 23:38:53,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:38:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:38:53,974 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:38:53,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:38:53,992 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1744237783] [2019-11-15 23:38:53,992 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:38:53,993 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-15 23:38:53,993 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056575563] [2019-11-15 23:38:53,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 23:38:53,994 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:38:53,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 23:38:53,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 23:38:53,994 INFO L87 Difference]: Start difference. First operand 6519 states and 9606 transitions. Second operand 4 states. [2019-11-15 23:38:54,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:38:54,771 INFO L93 Difference]: Finished difference Result 16434 states and 24437 transitions. [2019-11-15 23:38:54,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 23:38:54,772 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2019-11-15 23:38:54,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:38:54,796 INFO L225 Difference]: With dead ends: 16434 [2019-11-15 23:38:54,796 INFO L226 Difference]: Without dead ends: 9963 [2019-11-15 23:38:54,810 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 23:38:54,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9963 states. [2019-11-15 23:38:55,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9963 to 9903. [2019-11-15 23:38:55,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9903 states. [2019-11-15 23:38:55,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9903 states to 9903 states and 14658 transitions. [2019-11-15 23:38:55,152 INFO L78 Accepts]: Start accepts. Automaton has 9903 states and 14658 transitions. Word has length 85 [2019-11-15 23:38:55,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:38:55,154 INFO L462 AbstractCegarLoop]: Abstraction has 9903 states and 14658 transitions. [2019-11-15 23:38:55,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 23:38:55,154 INFO L276 IsEmpty]: Start isEmpty. Operand 9903 states and 14658 transitions. [2019-11-15 23:38:55,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-15 23:38:55,165 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:38:55,165 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:38:55,373 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:38:55,374 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:38:55,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:38:55,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1596872838, now seen corresponding path program 1 times [2019-11-15 23:38:55,375 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:38:55,375 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [332924023] [2019-11-15 23:38:55,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:38:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:38:56,210 INFO L256 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 23:38:56,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:38:56,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 23:38:56,238 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:38:56,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 23:38:56,279 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [332924023] [2019-11-15 23:38:56,280 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:38:56,280 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-15 23:38:56,280 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45213459] [2019-11-15 23:38:56,281 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 23:38:56,281 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:38:56,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 23:38:56,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-15 23:38:56,282 INFO L87 Difference]: Start difference. First operand 9903 states and 14658 transitions. Second operand 6 states. [2019-11-15 23:38:58,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:38:58,012 INFO L93 Difference]: Finished difference Result 28297 states and 41956 transitions. [2019-11-15 23:38:58,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 23:38:58,013 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2019-11-15 23:38:58,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:38:58,052 INFO L225 Difference]: With dead ends: 28297 [2019-11-15 23:38:58,053 INFO L226 Difference]: Without dead ends: 18442 [2019-11-15 23:38:58,071 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-15 23:38:58,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18442 states. [2019-11-15 23:38:58,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18442 to 9369. [2019-11-15 23:38:58,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9369 states. [2019-11-15 23:38:58,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9369 states to 9369 states and 13768 transitions. [2019-11-15 23:38:58,747 INFO L78 Accepts]: Start accepts. Automaton has 9369 states and 13768 transitions. Word has length 86 [2019-11-15 23:38:58,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:38:58,748 INFO L462 AbstractCegarLoop]: Abstraction has 9369 states and 13768 transitions. [2019-11-15 23:38:58,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 23:38:58,748 INFO L276 IsEmpty]: Start isEmpty. Operand 9369 states and 13768 transitions. [2019-11-15 23:38:58,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-15 23:38:58,760 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:38:58,761 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:38:58,977 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:38:58,978 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:38:58,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:38:58,978 INFO L82 PathProgramCache]: Analyzing trace with hash -666148462, now seen corresponding path program 1 times [2019-11-15 23:38:58,979 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:38:58,979 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1652855100] [2019-11-15 23:38:58,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:38:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:38:59,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 23:38:59,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:38:59,545 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-15 23:38:59,545 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:38:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-15 23:38:59,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1652855100] [2019-11-15 23:38:59,569 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:38:59,569 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-15 23:38:59,569 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922555460] [2019-11-15 23:38:59,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 23:38:59,570 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:38:59,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 23:38:59,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-15 23:38:59,571 INFO L87 Difference]: Start difference. First operand 9369 states and 13768 transitions. Second operand 6 states. [2019-11-15 23:39:00,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:39:00,078 INFO L93 Difference]: Finished difference Result 23918 states and 34959 transitions. [2019-11-15 23:39:00,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 23:39:00,080 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2019-11-15 23:39:00,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:39:00,106 INFO L225 Difference]: With dead ends: 23918 [2019-11-15 23:39:00,107 INFO L226 Difference]: Without dead ends: 14597 [2019-11-15 23:39:00,122 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-15 23:39:00,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14597 states. [2019-11-15 23:39:00,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14597 to 9385. [2019-11-15 23:39:00,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9385 states. [2019-11-15 23:39:00,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9385 states to 9385 states and 13784 transitions. [2019-11-15 23:39:00,534 INFO L78 Accepts]: Start accepts. Automaton has 9385 states and 13784 transitions. Word has length 119 [2019-11-15 23:39:00,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:39:00,534 INFO L462 AbstractCegarLoop]: Abstraction has 9385 states and 13784 transitions. [2019-11-15 23:39:00,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 23:39:00,534 INFO L276 IsEmpty]: Start isEmpty. Operand 9385 states and 13784 transitions. [2019-11-15 23:39:00,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-15 23:39:00,547 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:39:00,547 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:39:00,754 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:39:00,757 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:39:00,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:39:00,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1725619653, now seen corresponding path program 1 times [2019-11-15 23:39:00,759 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:39:00,759 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1520363638] [2019-11-15 23:39:00,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:39:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:39:01,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 23:39:01,507 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:39:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-15 23:39:01,555 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:39:01,596 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-15 23:39:01,597 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1520363638] [2019-11-15 23:39:01,597 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:39:01,597 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-11-15 23:39:01,597 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283393785] [2019-11-15 23:39:01,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 23:39:01,598 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:39:01,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 23:39:01,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-15 23:39:01,599 INFO L87 Difference]: Start difference. First operand 9385 states and 13784 transitions. Second operand 8 states. [2019-11-15 23:39:02,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:39:02,767 INFO L93 Difference]: Finished difference Result 28802 states and 42037 transitions. [2019-11-15 23:39:02,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-15 23:39:02,768 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 126 [2019-11-15 23:39:02,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:39:02,786 INFO L225 Difference]: With dead ends: 28802 [2019-11-15 23:39:02,786 INFO L226 Difference]: Without dead ends: 19465 [2019-11-15 23:39:02,802 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2019-11-15 23:39:02,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19465 states. [2019-11-15 23:39:03,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19465 to 9385. [2019-11-15 23:39:03,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9385 states. [2019-11-15 23:39:03,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9385 states to 9385 states and 13784 transitions. [2019-11-15 23:39:03,257 INFO L78 Accepts]: Start accepts. Automaton has 9385 states and 13784 transitions. Word has length 126 [2019-11-15 23:39:03,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:39:03,258 INFO L462 AbstractCegarLoop]: Abstraction has 9385 states and 13784 transitions. [2019-11-15 23:39:03,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 23:39:03,258 INFO L276 IsEmpty]: Start isEmpty. Operand 9385 states and 13784 transitions. [2019-11-15 23:39:03,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-15 23:39:03,278 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:39:03,279 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:39:03,484 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:39:03,485 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:39:03,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:39:03,486 INFO L82 PathProgramCache]: Analyzing trace with hash 348648210, now seen corresponding path program 1 times [2019-11-15 23:39:03,487 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:39:03,487 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [970976463] [2019-11-15 23:39:03,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:39:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:39:04,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-15 23:39:04,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:39:04,449 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-15 23:39:04,452 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:39:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-15 23:39:04,718 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [970976463] [2019-11-15 23:39:04,718 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:39:04,719 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2019-11-15 23:39:04,719 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015697427] [2019-11-15 23:39:04,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-15 23:39:04,720 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:39:04,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-15 23:39:04,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-15 23:39:04,720 INFO L87 Difference]: Start difference. First operand 9385 states and 13784 transitions. Second operand 12 states. [2019-11-15 23:39:09,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:39:09,912 INFO L93 Difference]: Finished difference Result 26004 states and 38082 transitions. [2019-11-15 23:39:09,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-15 23:39:09,913 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 141 [2019-11-15 23:39:09,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:39:09,928 INFO L225 Difference]: With dead ends: 26004 [2019-11-15 23:39:09,928 INFO L226 Difference]: Without dead ends: 16667 [2019-11-15 23:39:09,940 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-11-15 23:39:09,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16667 states. [2019-11-15 23:39:10,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16667 to 9425. [2019-11-15 23:39:10,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9425 states. [2019-11-15 23:39:10,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9425 states to 9425 states and 13824 transitions. [2019-11-15 23:39:10,428 INFO L78 Accepts]: Start accepts. Automaton has 9425 states and 13824 transitions. Word has length 141 [2019-11-15 23:39:10,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:39:10,428 INFO L462 AbstractCegarLoop]: Abstraction has 9425 states and 13824 transitions. [2019-11-15 23:39:10,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-15 23:39:10,428 INFO L276 IsEmpty]: Start isEmpty. Operand 9425 states and 13824 transitions. [2019-11-15 23:39:10,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-15 23:39:10,436 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:39:10,436 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:39:10,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:39:10,645 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:39:10,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:39:10,645 INFO L82 PathProgramCache]: Analyzing trace with hash -422085356, now seen corresponding path program 1 times [2019-11-15 23:39:10,646 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:39:10,646 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [593390808] [2019-11-15 23:39:10,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:39:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:39:11,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-15 23:39:11,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:39:11,409 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-15 23:39:11,409 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:39:11,423 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 23:39:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-15 23:39:11,609 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [593390808] [2019-11-15 23:39:11,609 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:39:11,609 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2019-11-15 23:39:11,609 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124424510] [2019-11-15 23:39:11,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-15 23:39:11,610 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:39:11,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-15 23:39:11,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-11-15 23:39:11,610 INFO L87 Difference]: Start difference. First operand 9425 states and 13824 transitions. Second operand 11 states. [2019-11-15 23:39:15,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:39:15,927 INFO L93 Difference]: Finished difference Result 80125 states and 117364 transitions. [2019-11-15 23:39:15,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-15 23:39:15,928 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 141 [2019-11-15 23:39:15,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:39:15,995 INFO L225 Difference]: With dead ends: 80125 [2019-11-15 23:39:15,995 INFO L226 Difference]: Without dead ends: 70748 [2019-11-15 23:39:16,009 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2019-11-15 23:39:16,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70748 states. [2019-11-15 23:39:17,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70748 to 19798. [2019-11-15 23:39:17,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19798 states. [2019-11-15 23:39:17,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19798 states to 19798 states and 29027 transitions. [2019-11-15 23:39:17,629 INFO L78 Accepts]: Start accepts. Automaton has 19798 states and 29027 transitions. Word has length 141 [2019-11-15 23:39:17,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:39:17,629 INFO L462 AbstractCegarLoop]: Abstraction has 19798 states and 29027 transitions. [2019-11-15 23:39:17,630 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-15 23:39:17,630 INFO L276 IsEmpty]: Start isEmpty. Operand 19798 states and 29027 transitions. [2019-11-15 23:39:17,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-15 23:39:17,648 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:39:17,648 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:39:17,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:39:17,856 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:39:17,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:39:17,856 INFO L82 PathProgramCache]: Analyzing trace with hash 2027514774, now seen corresponding path program 1 times [2019-11-15 23:39:17,857 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:39:17,857 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1590234060] [2019-11-15 23:39:17,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:39:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:39:18,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 23:39:18,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:39:18,484 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-15 23:39:18,484 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:39:18,521 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-15 23:39:18,522 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1590234060] [2019-11-15 23:39:18,522 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:39:18,522 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-15 23:39:18,522 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862481173] [2019-11-15 23:39:18,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 23:39:18,523 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:39:18,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 23:39:18,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-15 23:39:18,523 INFO L87 Difference]: Start difference. First operand 19798 states and 29027 transitions. Second operand 6 states. [2019-11-15 23:39:24,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:39:24,022 INFO L93 Difference]: Finished difference Result 89569 states and 130937 transitions. [2019-11-15 23:39:24,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 23:39:24,023 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-11-15 23:39:24,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:39:24,106 INFO L225 Difference]: With dead ends: 89569 [2019-11-15 23:39:24,107 INFO L226 Difference]: Without dead ends: 89561 [2019-11-15 23:39:24,122 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-15 23:39:24,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89561 states. [2019-11-15 23:39:29,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89561 to 79476. [2019-11-15 23:39:29,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79476 states. [2019-11-15 23:39:29,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79476 states to 79476 states and 116349 transitions. [2019-11-15 23:39:29,562 INFO L78 Accepts]: Start accepts. Automaton has 79476 states and 116349 transitions. Word has length 141 [2019-11-15 23:39:29,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:39:29,562 INFO L462 AbstractCegarLoop]: Abstraction has 79476 states and 116349 transitions. [2019-11-15 23:39:29,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 23:39:29,562 INFO L276 IsEmpty]: Start isEmpty. Operand 79476 states and 116349 transitions. [2019-11-15 23:39:29,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-15 23:39:29,585 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:39:29,586 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:39:29,792 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:39:29,793 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:39:29,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:39:29,793 INFO L82 PathProgramCache]: Analyzing trace with hash 2007380076, now seen corresponding path program 1 times [2019-11-15 23:39:29,794 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:39:29,794 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1334879301] [2019-11-15 23:39:29,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:39:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:39:30,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-15 23:39:30,458 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:39:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-15 23:39:30,482 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:39:30,511 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-15 23:39:30,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1334879301] [2019-11-15 23:39:30,511 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:39:30,512 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-15 23:39:30,512 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030023156] [2019-11-15 23:39:30,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 23:39:30,513 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:39:30,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 23:39:30,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 23:39:30,513 INFO L87 Difference]: Start difference. First operand 79476 states and 116349 transitions. Second operand 4 states. [2019-11-15 23:39:33,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:39:33,700 INFO L93 Difference]: Finished difference Result 121298 states and 177647 transitions. [2019-11-15 23:39:33,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 23:39:33,700 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2019-11-15 23:39:33,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:39:33,741 INFO L225 Difference]: With dead ends: 121298 [2019-11-15 23:39:33,741 INFO L226 Difference]: Without dead ends: 37450 [2019-11-15 23:39:33,782 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 23:39:33,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37450 states. [2019-11-15 23:39:35,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37450 to 37065. [2019-11-15 23:39:35,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37065 states. [2019-11-15 23:39:35,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37065 states to 37065 states and 53973 transitions. [2019-11-15 23:39:35,899 INFO L78 Accepts]: Start accepts. Automaton has 37065 states and 53973 transitions. Word has length 145 [2019-11-15 23:39:35,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:39:35,899 INFO L462 AbstractCegarLoop]: Abstraction has 37065 states and 53973 transitions. [2019-11-15 23:39:35,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 23:39:35,899 INFO L276 IsEmpty]: Start isEmpty. Operand 37065 states and 53973 transitions. [2019-11-15 23:39:35,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-15 23:39:35,909 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:39:35,910 INFO L380 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:39:36,110 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:39:36,110 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:39:36,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:39:36,111 INFO L82 PathProgramCache]: Analyzing trace with hash -325370741, now seen corresponding path program 1 times [2019-11-15 23:39:36,111 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:39:36,112 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [251899806] [2019-11-15 23:39:36,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/cvc4 Starting monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:39:37,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:39:37,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 862 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-15 23:39:37,267 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:39:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-15 23:39:37,298 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:39:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-15 23:39:37,315 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [251899806] [2019-11-15 23:39:37,315 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:39:37,315 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-15 23:39:37,316 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770697912] [2019-11-15 23:39:37,316 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 23:39:37,316 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:39:37,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 23:39:37,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-15 23:39:37,317 INFO L87 Difference]: Start difference. First operand 37065 states and 53973 transitions. Second operand 4 states. [2019-11-15 23:39:48,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:39:48,326 INFO L93 Difference]: Finished difference Result 162556 states and 236709 transitions. [2019-11-15 23:39:48,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 23:39:48,328 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2019-11-15 23:39:48,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:39:48,466 INFO L225 Difference]: With dead ends: 162556 [2019-11-15 23:39:48,466 INFO L226 Difference]: Without dead ends: 125597 [2019-11-15 23:39:48,494 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:39:48,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125597 states. [2019-11-15 23:39:51,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125597 to 37161. [2019-11-15 23:39:51,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37161 states. [2019-11-15 23:39:51,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37161 states to 37161 states and 54069 transitions. [2019-11-15 23:39:51,337 INFO L78 Accepts]: Start accepts. Automaton has 37161 states and 54069 transitions. Word has length 153 [2019-11-15 23:39:51,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:39:51,337 INFO L462 AbstractCegarLoop]: Abstraction has 37161 states and 54069 transitions. [2019-11-15 23:39:51,337 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 23:39:51,337 INFO L276 IsEmpty]: Start isEmpty. Operand 37161 states and 54069 transitions. [2019-11-15 23:39:51,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-15 23:39:51,346 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:39:51,347 INFO L380 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:39:51,557 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:39:51,557 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:39:51,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:39:51,557 INFO L82 PathProgramCache]: Analyzing trace with hash 938848981, now seen corresponding path program 1 times [2019-11-15 23:39:51,558 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:39:51,559 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [628766115] [2019-11-15 23:39:51,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:39:52,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:39:52,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-15 23:39:52,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:39:52,955 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-15 23:39:52,955 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 23:39:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-15 23:39:53,178 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [628766115] [2019-11-15 23:39:53,179 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:39:53,179 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2019-11-15 23:39:53,179 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772521082] [2019-11-15 23:39:53,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-15 23:39:53,179 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 23:39:53,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-15 23:39:53,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-11-15 23:39:53,180 INFO L87 Difference]: Start difference. First operand 37161 states and 54069 transitions. Second operand 14 states. [2019-11-15 23:40:10,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:40:10,400 INFO L93 Difference]: Finished difference Result 247256 states and 359845 transitions. [2019-11-15 23:40:10,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-15 23:40:10,401 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 154 [2019-11-15 23:40:10,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:40:10,637 INFO L225 Difference]: With dead ends: 247256 [2019-11-15 23:40:10,637 INFO L226 Difference]: Without dead ends: 210201 [2019-11-15 23:40:10,680 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2019-11-15 23:40:10,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210201 states. [2019-11-15 23:40:14,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210201 to 37305. [2019-11-15 23:40:14,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37305 states. [2019-11-15 23:40:14,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37305 states to 37305 states and 54165 transitions. [2019-11-15 23:40:14,987 INFO L78 Accepts]: Start accepts. Automaton has 37305 states and 54165 transitions. Word has length 154 [2019-11-15 23:40:14,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:40:14,987 INFO L462 AbstractCegarLoop]: Abstraction has 37305 states and 54165 transitions. [2019-11-15 23:40:14,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-15 23:40:14,987 INFO L276 IsEmpty]: Start isEmpty. Operand 37305 states and 54165 transitions. [2019-11-15 23:40:14,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-11-15 23:40:15,000 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:40:15,000 INFO L380 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:40:15,213 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:40:15,213 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:40:15,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:40:15,213 INFO L82 PathProgramCache]: Analyzing trace with hash -379097596, now seen corresponding path program 1 times [2019-11-15 23:40:15,214 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 23:40:15,215 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [838380910] [2019-11-15 23:40:15,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a304da4-7173-422b-9932-9fe1d2502b4b/bin/uautomizer/cvc4 Starting monitored process 18 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:41:43,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:41:43,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 110 conjunts are in the unsatisfiable core [2019-11-15 23:41:43,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:41:43,714 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 23:41:43,715 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 23:41:43,717 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 23:41:43,726 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2019-11-15 23:41:43,726 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 23:41:43,766 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:41:43,767 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 23:41:43,767 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:48 [2019-11-15 23:41:43,883 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 23:41:43,885 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 23:41:43,887 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 23:41:43,890 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2019-11-15 23:41:43,890 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 23:41:43,945 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:41:43,945 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 23:41:43,945 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:67, output treesize:48 [2019-11-15 23:41:46,003 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 23:43:42,421 WARN L191 SmtUtils]: Spent 1.94 m on a formula simplification that was a NOOP. DAG size: 202 [2019-11-15 23:43:42,421 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:43:42,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 23:43:42,646 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:277) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive$TermWalker.walk(NonRecursive.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:195) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.downgradeDimensionsIfNecessary(ArrayOccurrenceAnalysis.java:171) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.computeCostEstimation(ArrayIndexBasedCostEstimation.java:132) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.(ArrayIndexBasedCostEstimation.java:64) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:390) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:292) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.checkFeasibility(TraceAbstractionRefinementEngine.java:244) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-15 23:43:42,652 INFO L168 Benchmark]: Toolchain (without parser) took 314133.18 ms. Allocated memory was 1.0 GB in the beginning and 5.3 GB in the end (delta: 4.3 GB). Free memory was 941.6 MB in the beginning and 3.3 GB in the end (delta: -2.3 GB). Peak memory consumption was 1.9 GB. Max. memory is 11.5 GB. [2019-11-15 23:43:42,652 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 977.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:43:42,653 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2298.63 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 116.4 MB). Free memory was 941.6 MB in the beginning and 943.4 MB in the end (delta: -1.8 MB). Peak memory consumption was 129.3 MB. Max. memory is 11.5 GB. [2019-11-15 23:43:42,653 INFO L168 Benchmark]: Boogie Procedure Inliner took 268.32 ms. Allocated memory is still 1.1 GB. Free memory was 943.4 MB in the beginning and 922.2 MB in the end (delta: 21.2 MB). Peak memory consumption was 21.2 MB. Max. memory is 11.5 GB. [2019-11-15 23:43:42,654 INFO L168 Benchmark]: Boogie Preprocessor took 212.53 ms. Allocated memory is still 1.1 GB. Free memory was 922.2 MB in the beginning and 901.0 MB in the end (delta: 21.2 MB). Peak memory consumption was 21.2 MB. Max. memory is 11.5 GB. [2019-11-15 23:43:42,654 INFO L168 Benchmark]: RCFGBuilder took 10419.66 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 131.6 MB). Free memory was 901.0 MB in the beginning and 751.3 MB in the end (delta: 149.7 MB). Peak memory consumption was 281.3 MB. Max. memory is 11.5 GB. [2019-11-15 23:43:42,655 INFO L168 Benchmark]: TraceAbstraction took 300929.97 ms. Allocated memory was 1.3 GB in the beginning and 5.3 GB in the end (delta: 4.0 GB). Free memory was 751.3 MB in the beginning and 3.3 GB in the end (delta: -2.5 GB). Peak memory consumption was 1.5 GB. Max. memory is 11.5 GB. [2019-11-15 23:43:42,659 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 977.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 2298.63 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 116.4 MB). Free memory was 941.6 MB in the beginning and 943.4 MB in the end (delta: -1.8 MB). Peak memory consumption was 129.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 268.32 ms. Allocated memory is still 1.1 GB. Free memory was 943.4 MB in the beginning and 922.2 MB in the end (delta: 21.2 MB). Peak memory consumption was 21.2 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 212.53 ms. Allocated memory is still 1.1 GB. Free memory was 922.2 MB in the beginning and 901.0 MB in the end (delta: 21.2 MB). Peak memory consumption was 21.2 MB. Max. memory is 11.5 GB. * RCFGBuilder took 10419.66 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 131.6 MB). Free memory was 901.0 MB in the beginning and 751.3 MB in the end (delta: 149.7 MB). Peak memory consumption was 281.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 300929.97 ms. Allocated memory was 1.3 GB in the beginning and 5.3 GB in the end (delta: 4.0 GB). Free memory was 751.3 MB in the beginning and 3.3 GB in the end (delta: -2.5 GB). Peak memory consumption was 1.5 GB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:277) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...