./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9cd87c15c4637a3ecd407847e5a675763d5fece5 ........................................................................................................................................................................................................................................... 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_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9cd87c15c4637a3ecd407847e5a675763d5fece5 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 19:31:02,023 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 19:31:02,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 19:31:02,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 19:31:02,032 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 19:31:02,033 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 19:31:02,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 19:31:02,035 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 19:31:02,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 19:31:02,037 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 19:31:02,038 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 19:31:02,038 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 19:31:02,039 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 19:31:02,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 19:31:02,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 19:31:02,041 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 19:31:02,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 19:31:02,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 19:31:02,043 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 19:31:02,045 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 19:31:02,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 19:31:02,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 19:31:02,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 19:31:02,048 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 19:31:02,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 19:31:02,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 19:31:02,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 19:31:02,050 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 19:31:02,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 19:31:02,051 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 19:31:02,051 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 19:31:02,052 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 19:31:02,052 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 19:31:02,053 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 19:31:02,053 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 19:31:02,053 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 19:31:02,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 19:31:02,054 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 19:31:02,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 19:31:02,054 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 19:31:02,055 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 19:31:02,055 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 19:31:02,065 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 19:31:02,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 19:31:02,066 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 19:31:02,066 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 19:31:02,066 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 19:31:02,066 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 19:31:02,066 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 19:31:02,066 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 19:31:02,066 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 19:31:02,066 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 19:31:02,066 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 19:31:02,067 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 19:31:02,067 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 19:31:02,067 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 19:31:02,067 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 19:31:02,067 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 19:31:02,067 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 19:31:02,068 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 19:31:02,068 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 19:31:02,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 19:31:02,068 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 19:31:02,068 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 19:31:02,068 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 19:31:02,068 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 19:31:02,068 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 19:31:02,068 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 19:31:02,069 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 19:31:02,069 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 19:31:02,069 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 19:31:02,069 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 19:31:02,069 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 19:31:02,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 19:31:02,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 19:31:02,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 19:31:02,070 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 19:31:02,070 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 19:31:02,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 19:31:02,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 19:31:02,070 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 19:31:02,070 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 19:31:02,070 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan 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 -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9cd87c15c4637a3ecd407847e5a675763d5fece5 [2019-12-07 19:31:02,174 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 19:31:02,184 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 19:31:02,187 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 19:31:02,188 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 19:31:02,189 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 19:31:02,189 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2019-12-07 19:31:02,233 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/data/d3755f5ec/681a55e28df64fd2af5e105c155f0c5d/FLAGf08459f61 [2019-12-07 19:31:02,658 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 19:31:02,659 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2019-12-07 19:31:02,663 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/data/d3755f5ec/681a55e28df64fd2af5e105c155f0c5d/FLAGf08459f61 [2019-12-07 19:31:02,671 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/data/d3755f5ec/681a55e28df64fd2af5e105c155f0c5d [2019-12-07 19:31:02,673 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 19:31:02,674 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 19:31:02,674 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 19:31:02,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 19:31:02,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 19:31:02,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 07:31:02" (1/1) ... [2019-12-07 19:31:02,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@174ba895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:31:02, skipping insertion in model container [2019-12-07 19:31:02,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 07:31:02" (1/1) ... [2019-12-07 19:31:02,684 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 19:31:02,694 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 19:31:02,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 19:31:02,794 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 19:31:02,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 19:31:02,844 INFO L208 MainTranslator]: Completed translation [2019-12-07 19:31:02,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:31:02 WrapperNode [2019-12-07 19:31:02,845 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 19:31:02,845 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 19:31:02,845 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 19:31:02,845 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 19:31:02,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:31:02" (1/1) ... [2019-12-07 19:31:02,854 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:31:02" (1/1) ... [2019-12-07 19:31:02,865 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 19:31:02,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 19:31:02,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 19:31:02,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 19:31:02,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:31:02" (1/1) ... [2019-12-07 19:31:02,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:31:02" (1/1) ... [2019-12-07 19:31:02,871 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:31:02" (1/1) ... [2019-12-07 19:31:02,871 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:31:02" (1/1) ... [2019-12-07 19:31:02,873 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:31:02" (1/1) ... [2019-12-07 19:31:02,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:31:02" (1/1) ... [2019-12-07 19:31:02,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:31:02" (1/1) ... [2019-12-07 19:31:02,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 19:31:02,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 19:31:02,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 19:31:02,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 19:31:02,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:31:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/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 [2019-12-07 19:31:02,915 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2019-12-07 19:31:02,915 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2019-12-07 19:31:02,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 19:31:02,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 19:31:03,017 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 19:31:03,017 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 19:31:03,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:31:03 BoogieIcfgContainer [2019-12-07 19:31:03,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 19:31:03,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 19:31:03,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 19:31:03,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 19:31:03,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 07:31:02" (1/3) ... [2019-12-07 19:31:03,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b3f356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 07:31:03, skipping insertion in model container [2019-12-07 19:31:03,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:31:02" (2/3) ... [2019-12-07 19:31:03,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b3f356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 07:31:03, skipping insertion in model container [2019-12-07 19:31:03,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:31:03" (3/3) ... [2019-12-07 19:31:03,022 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2019-12-07 19:31:03,028 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 19:31:03,032 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 19:31:03,039 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 19:31:03,053 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 19:31:03,054 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 19:31:03,054 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 19:31:03,054 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 19:31:03,054 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 19:31:03,054 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 19:31:03,054 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 19:31:03,054 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 19:31:03,064 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-12-07 19:31:03,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 19:31:03,068 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:31:03,068 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:31:03,068 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:31:03,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:31:03,072 INFO L82 PathProgramCache]: Analyzing trace with hash 2032829855, now seen corresponding path program 1 times [2019-12-07 19:31:03,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:31:03,078 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918882156] [2019-12-07 19:31:03,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:31:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 19:31:03,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 19:31:03,164 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-12-07 19:31:03,165 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 19:31:03,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 07:31:03 BoogieIcfgContainer [2019-12-07 19:31:03,180 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 19:31:03,180 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 19:31:03,180 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 19:31:03,180 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 19:31:03,181 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:31:03" (3/4) ... [2019-12-07 19:31:03,183 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 19:31:03,183 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 19:31:03,185 INFO L168 Benchmark]: Toolchain (without parser) took 510.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -163.1 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:31:03,185 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:31:03,186 INFO L168 Benchmark]: CACSL2BoogieTranslator took 170.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -204.4 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-12-07 19:31:03,186 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.40 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:31:03,186 INFO L168 Benchmark]: Boogie Preprocessor took 11.20 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:31:03,187 INFO L168 Benchmark]: RCFGBuilder took 141.57 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 11.5 GB. [2019-12-07 19:31:03,187 INFO L168 Benchmark]: TraceAbstraction took 161.42 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. [2019-12-07 19:31:03,187 INFO L168 Benchmark]: Witness Printer took 2.98 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 19:31:03,190 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 170.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -204.4 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.40 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.20 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 141.57 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 161.42 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. * Witness Printer took 2.98 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 34]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of shiftLeft at line 31. Possible FailurePath: [L25] int n = __VERIFIER_nondet_int(); [L26] COND FALSE !(n < 1) [L29] CALL, EXPR hanoi(n) VAL [\old(n)=1] [L17] COND TRUE n == 1 [L18] return 1; VAL [\old(n)=1, \result=1, n=1] [L29] RET, EXPR hanoi(n) [L29] unsigned result = hanoi(n); [L31] COND FALSE !(result+1>0 && result+1 == 1< main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan 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 -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9cd87c15c4637a3ecd407847e5a675763d5fece5 [2019-12-07 19:31:04,749 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 19:31:04,758 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 19:31:04,760 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 19:31:04,761 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 19:31:04,761 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 19:31:04,762 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2019-12-07 19:31:04,810 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/data/5f8ebcaa7/1d0e8ddf48c94e12a4d1424e395bcbe6/FLAG121bf24d8 [2019-12-07 19:31:05,189 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 19:31:05,190 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2019-12-07 19:31:05,194 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/data/5f8ebcaa7/1d0e8ddf48c94e12a4d1424e395bcbe6/FLAG121bf24d8 [2019-12-07 19:31:05,577 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/data/5f8ebcaa7/1d0e8ddf48c94e12a4d1424e395bcbe6 [2019-12-07 19:31:05,579 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 19:31:05,580 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 19:31:05,581 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 19:31:05,581 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 19:31:05,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 19:31:05,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 07:31:05" (1/1) ... [2019-12-07 19:31:05,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a0f9973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:31:05, skipping insertion in model container [2019-12-07 19:31:05,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 07:31:05" (1/1) ... [2019-12-07 19:31:05,593 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 19:31:05,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 19:31:05,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 19:31:05,702 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 19:31:05,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 19:31:05,721 INFO L208 MainTranslator]: Completed translation [2019-12-07 19:31:05,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:31:05 WrapperNode [2019-12-07 19:31:05,721 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 19:31:05,722 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 19:31:05,722 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 19:31:05,722 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 19:31:05,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:31:05" (1/1) ... [2019-12-07 19:31:05,731 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:31:05" (1/1) ... [2019-12-07 19:31:05,741 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 19:31:05,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 19:31:05,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 19:31:05,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 19:31:05,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:31:05" (1/1) ... [2019-12-07 19:31:05,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:31:05" (1/1) ... [2019-12-07 19:31:05,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:31:05" (1/1) ... [2019-12-07 19:31:05,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:31:05" (1/1) ... [2019-12-07 19:31:05,751 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:31:05" (1/1) ... [2019-12-07 19:31:05,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:31:05" (1/1) ... [2019-12-07 19:31:05,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:31:05" (1/1) ... [2019-12-07 19:31:05,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 19:31:05,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 19:31:05,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 19:31:05,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 19:31:05,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:31:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/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 [2019-12-07 19:31:05,820 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2019-12-07 19:31:05,820 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2019-12-07 19:31:05,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 19:31:05,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 19:31:05,923 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 19:31:05,923 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 19:31:05,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:31:05 BoogieIcfgContainer [2019-12-07 19:31:05,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 19:31:05,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 19:31:05,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 19:31:05,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 19:31:05,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 07:31:05" (1/3) ... [2019-12-07 19:31:05,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d47fe0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 07:31:05, skipping insertion in model container [2019-12-07 19:31:05,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:31:05" (2/3) ... [2019-12-07 19:31:05,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d47fe0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 07:31:05, skipping insertion in model container [2019-12-07 19:31:05,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:31:05" (3/3) ... [2019-12-07 19:31:05,929 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2019-12-07 19:31:05,936 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 19:31:05,940 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 19:31:05,948 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 19:31:05,962 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 19:31:05,963 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 19:31:05,963 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 19:31:05,963 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 19:31:05,963 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 19:31:05,963 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 19:31:05,963 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 19:31:05,963 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 19:31:05,973 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-12-07 19:31:05,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 19:31:05,977 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:31:05,977 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:31:05,978 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:31:05,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:31:05,981 INFO L82 PathProgramCache]: Analyzing trace with hash 2032829855, now seen corresponding path program 1 times [2019-12-07 19:31:05,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:31:05,989 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [253426380] [2019-12-07 19:31:05,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2019-12-07 19:31:06,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:31:06,019 WARN L262 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 19:31:06,023 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:31:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:31:06,115 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:31:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:31:06,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [253426380] [2019-12-07 19:31:06,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:31:06,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2019-12-07 19:31:06,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197256199] [2019-12-07 19:31:06,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 19:31:06,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 19:31:06,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 19:31:06,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-12-07 19:31:06,266 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 11 states. [2019-12-07 19:31:06,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:31:06,443 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2019-12-07 19:31:06,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 19:31:06,445 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2019-12-07 19:31:06,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:31:06,453 INFO L225 Difference]: With dead ends: 31 [2019-12-07 19:31:06,454 INFO L226 Difference]: Without dead ends: 15 [2019-12-07 19:31:06,457 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-12-07 19:31:06,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-12-07 19:31:06,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-12-07 19:31:06,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-12-07 19:31:06,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-12-07 19:31:06,490 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2019-12-07 19:31:06,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:31:06,490 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-12-07 19:31:06,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 19:31:06,490 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-12-07 19:31:06,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 19:31:06,491 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:31:06,491 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:31:06,692 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-12-07 19:31:06,692 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:31:06,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:31:06,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1521841779, now seen corresponding path program 1 times [2019-12-07 19:31:06,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:31:06,695 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [379314974] [2019-12-07 19:31:06,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2019-12-07 19:31:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:31:06,750 WARN L262 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 19:31:06,754 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:31:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 19:31:06,909 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:31:07,169 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:07,170 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 19:31:07,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [379314974] [2019-12-07 19:31:07,303 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [993646228] [2019-12-07 19:31:07,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/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 [2019-12-07 19:31:07,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:31:07,336 WARN L262 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 19:31:07,337 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:31:07,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 19:31:07,347 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:31:07,459 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:07,460 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:07,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 19:31:07,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839436566] [2019-12-07 19:31:07,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:31:07,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:31:07,623 WARN L262 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 19:31:07,626 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:31:07,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 19:31:07,671 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:31:07,791 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:07,792 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 19:31:07,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2019-12-07 19:31:07,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2019-12-07 19:31:07,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617779453] [2019-12-07 19:31:07,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 19:31:07,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 19:31:07,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 19:31:07,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2019-12-07 19:31:07,868 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 16 states. [2019-12-07 19:31:08,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:31:08,239 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2019-12-07 19:31:08,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 19:31:08,240 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2019-12-07 19:31:08,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:31:08,241 INFO L225 Difference]: With dead ends: 27 [2019-12-07 19:31:08,241 INFO L226 Difference]: Without dead ends: 21 [2019-12-07 19:31:08,242 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 67 SyntacticMatches, 9 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2019-12-07 19:31:08,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-12-07 19:31:08,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-12-07 19:31:08,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-12-07 19:31:08,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-12-07 19:31:08,247 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2019-12-07 19:31:08,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:31:08,247 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-12-07 19:31:08,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 19:31:08,248 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-12-07 19:31:08,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-07 19:31:08,248 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:31:08,249 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:31:08,850 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk,3 mathsat -unsat_core_generation=3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:31:08,852 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:31:08,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:31:08,853 INFO L82 PathProgramCache]: Analyzing trace with hash -88960435, now seen corresponding path program 2 times [2019-12-07 19:31:08,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:31:08,856 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1822196626] [2019-12-07 19:31:08,856 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2019-12-07 19:31:08,887 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 19:31:08,887 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:31:08,889 WARN L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-07 19:31:08,890 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:31:09,031 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 19:31:09,031 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:31:09,577 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:09,578 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:09,805 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:09,956 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:10,046 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 19:31:10,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1822196626] [2019-12-07 19:31:10,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [242165014] [2019-12-07 19:31:10,047 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/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 [2019-12-07 19:31:10,086 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 19:31:10,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:31:10,087 WARN L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-07 19:31:10,089 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:31:10,132 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 19:31:10,132 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:31:10,363 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:10,364 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:10,501 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:10,536 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:10,545 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 19:31:10,546 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929255457] [2019-12-07 19:31:10,546 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:31:10,568 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 19:31:10,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:31:10,570 WARN L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-07 19:31:10,571 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:31:10,594 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 19:31:10,595 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:31:10,799 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:10,799 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:10,927 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:10,928 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:10,955 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:10,955 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 19:31:10,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2019-12-07 19:31:10,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13, 15, 13, 15] total 26 [2019-12-07 19:31:10,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279266232] [2019-12-07 19:31:10,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-07 19:31:10,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 19:31:10,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-07 19:31:10,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2019-12-07 19:31:10,966 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 26 states. [2019-12-07 19:31:11,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:31:11,623 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-12-07 19:31:11,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-07 19:31:11,623 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2019-12-07 19:31:11,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:31:11,625 INFO L225 Difference]: With dead ends: 33 [2019-12-07 19:31:11,625 INFO L226 Difference]: Without dead ends: 27 [2019-12-07 19:31:11,626 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 123 SyntacticMatches, 15 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2019-12-07 19:31:11,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-12-07 19:31:11,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-12-07 19:31:11,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-07 19:31:11,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2019-12-07 19:31:11,630 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 28 [2019-12-07 19:31:11,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:31:11,630 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-12-07 19:31:11,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-07 19:31:11,631 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2019-12-07 19:31:11,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-07 19:31:11,632 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:31:11,632 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:31:12,233 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 mathsat -unsat_core_generation=3,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:31:12,234 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:31:12,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:31:12,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1444383501, now seen corresponding path program 3 times [2019-12-07 19:31:12,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:31:12,237 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [402431830] [2019-12-07 19:31:12,237 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2019-12-07 19:31:12,285 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-07 19:31:12,285 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:31:12,287 WARN L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-07 19:31:12,288 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:31:12,497 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-12-07 19:31:12,498 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:31:13,163 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:13,165 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:13,498 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:13,498 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:13,745 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:13,746 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:13,951 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:13,952 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:14,151 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:14,252 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 19:31:14,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [402431830] [2019-12-07 19:31:14,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [197438204] [2019-12-07 19:31:14,253 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/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 [2019-12-07 19:31:14,308 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-07 19:31:14,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:31:14,309 WARN L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-07 19:31:14,311 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:31:14,343 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-12-07 19:31:14,343 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:31:14,704 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:14,704 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:14,910 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:14,911 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:15,009 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:15,009 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:15,070 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:15,070 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:15,096 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:15,107 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 19:31:15,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829266745] [2019-12-07 19:31:15,107 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:31:15,147 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-07 19:31:15,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:31:15,149 WARN L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-07 19:31:15,150 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:31:15,158 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-12-07 19:31:15,158 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:31:15,542 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:15,542 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:15,761 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:15,851 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:15,920 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:15,948 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:15,957 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 19:31:15,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2019-12-07 19:31:15,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 17, 21, 17, 21] total 36 [2019-12-07 19:31:15,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739346857] [2019-12-07 19:31:15,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-12-07 19:31:15,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 19:31:15,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-12-07 19:31:15,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2019-12-07 19:31:15,959 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 36 states. [2019-12-07 19:31:16,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:31:16,875 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2019-12-07 19:31:16,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-07 19:31:16,876 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 40 [2019-12-07 19:31:16,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:31:16,877 INFO L225 Difference]: With dead ends: 39 [2019-12-07 19:31:16,877 INFO L226 Difference]: Without dead ends: 33 [2019-12-07 19:31:16,878 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 187 SyntacticMatches, 13 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=290, Invalid=2260, Unknown=0, NotChecked=0, Total=2550 [2019-12-07 19:31:16,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-12-07 19:31:16,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-12-07 19:31:16,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-07 19:31:16,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2019-12-07 19:31:16,882 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 40 [2019-12-07 19:31:16,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:31:16,883 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2019-12-07 19:31:16,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-12-07 19:31:16,883 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2019-12-07 19:31:16,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-07 19:31:16,884 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:31:16,884 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:31:17,485 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3,10 cvc4 --incremental --print-success --lang smt --rewrite-divk,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:31:17,486 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:31:17,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:31:17,487 INFO L82 PathProgramCache]: Analyzing trace with hash 608531405, now seen corresponding path program 4 times [2019-12-07 19:31:17,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:31:17,489 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469542227] [2019-12-07 19:31:17,489 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2019-12-07 19:31:17,526 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 19:31:17,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:31:17,528 WARN L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 36 conjunts are in the unsatisfiable core [2019-12-07 19:31:17,529 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:31:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-12-07 19:31:17,798 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:31:18,525 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:18,525 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:18,966 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:19,290 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:19,290 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:19,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:19,611 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:19,904 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:20,146 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:20,391 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-12-07 19:31:20,545 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469542227] [2019-12-07 19:31:20,545 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [68573588] [2019-12-07 19:31:20,546 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/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 [2019-12-07 19:31:20,615 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 19:31:20,615 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:31:20,616 WARN L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 36 conjunts are in the unsatisfiable core [2019-12-07 19:31:20,617 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:31:20,631 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-12-07 19:31:20,631 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:31:21,101 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:21,101 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:21,374 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:21,374 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:21,561 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:21,562 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:21,680 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:21,680 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:21,769 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:21,825 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:21,851 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:21,851 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:21,864 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-12-07 19:31:21,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769905552] [2019-12-07 19:31:21,864 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:31:21,902 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 19:31:21,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:31:21,904 WARN L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 36 conjunts are in the unsatisfiable core [2019-12-07 19:31:21,905 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:31:21,949 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-12-07 19:31:21,950 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:31:22,519 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:22,519 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:22,844 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:23,033 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:23,033 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:23,151 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:23,301 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:23,403 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:23,404 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:23,429 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:23,429 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:23,442 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-12-07 19:31:23,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2019-12-07 19:31:23,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27, 21, 27, 21, 27] total 46 [2019-12-07 19:31:23,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031505850] [2019-12-07 19:31:23,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-12-07 19:31:23,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 19:31:23,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-12-07 19:31:23,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1913, Unknown=0, NotChecked=0, Total=2070 [2019-12-07 19:31:23,445 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 46 states. [2019-12-07 19:31:24,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:31:24,700 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2019-12-07 19:31:24,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-07 19:31:24,701 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 52 [2019-12-07 19:31:24,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:31:24,702 INFO L225 Difference]: With dead ends: 45 [2019-12-07 19:31:24,702 INFO L226 Difference]: Without dead ends: 39 [2019-12-07 19:31:24,703 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 242 SyntacticMatches, 20 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=414, Invalid=3746, Unknown=0, NotChecked=0, Total=4160 [2019-12-07 19:31:24,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-12-07 19:31:24,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-12-07 19:31:24,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-07 19:31:24,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2019-12-07 19:31:24,708 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 52 [2019-12-07 19:31:24,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:31:24,708 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2019-12-07 19:31:24,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-12-07 19:31:24,708 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2019-12-07 19:31:24,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-12-07 19:31:24,710 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:31:24,710 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:31:25,311 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 cvc4 --incremental --print-success --lang smt --rewrite-divk,12 mathsat -unsat_core_generation=3 [2019-12-07 19:31:25,312 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:31:25,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:31:25,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1459073907, now seen corresponding path program 5 times [2019-12-07 19:31:25,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:31:25,312 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [311055034] [2019-12-07 19:31:25,313 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2019-12-07 19:31:25,393 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-12-07 19:31:25,393 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:31:25,396 WARN L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 44 conjunts are in the unsatisfiable core [2019-12-07 19:31:25,397 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:31:25,753 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-12-07 19:31:25,753 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:31:26,651 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:26,652 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:27,150 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:27,569 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:27,965 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:27,966 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:28,339 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:28,682 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:28,682 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:29,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:29,297 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:29,598 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-12-07 19:31:29,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [311055034] [2019-12-07 19:31:29,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1948267757] [2019-12-07 19:31:29,749 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/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 [2019-12-07 19:31:29,846 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-12-07 19:31:29,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:31:29,847 WARN L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 44 conjunts are in the unsatisfiable core [2019-12-07 19:31:29,848 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:31:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-12-07 19:31:29,860 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:31:30,498 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:30,499 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:30,871 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:30,872 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:31,089 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:31,270 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:31,270 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:31,462 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:31,462 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:31,577 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:31,577 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:31,716 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:31,716 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:31,773 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:31,797 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:31,797 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:31,815 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-12-07 19:31:31,815 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064078106] [2019-12-07 19:31:31,815 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:31:31,875 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-12-07 19:31:31,875 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:31:31,877 WARN L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 44 conjunts are in the unsatisfiable core [2019-12-07 19:31:31,878 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:31:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-12-07 19:31:31,890 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:31:32,498 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:32,499 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:32,842 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:32,842 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:33,054 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:33,234 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:33,235 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:33,445 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:33,689 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:33,947 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:34,003 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:34,027 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:34,028 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:34,047 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-12-07 19:31:34,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2019-12-07 19:31:34,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 33, 25, 33, 25, 33] total 56 [2019-12-07 19:31:34,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246293508] [2019-12-07 19:31:34,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-12-07 19:31:34,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 19:31:34,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-12-07 19:31:34,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2885, Unknown=0, NotChecked=0, Total=3080 [2019-12-07 19:31:34,049 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 56 states. [2019-12-07 19:31:35,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:31:35,847 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2019-12-07 19:31:35,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-07 19:31:35,848 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 64 [2019-12-07 19:31:35,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:31:35,849 INFO L225 Difference]: With dead ends: 51 [2019-12-07 19:31:35,849 INFO L226 Difference]: Without dead ends: 45 [2019-12-07 19:31:35,851 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 300 SyntacticMatches, 24 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=554, Invalid=5608, Unknown=0, NotChecked=0, Total=6162 [2019-12-07 19:31:35,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-12-07 19:31:35,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-12-07 19:31:35,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-12-07 19:31:35,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2019-12-07 19:31:35,855 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 64 [2019-12-07 19:31:35,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:31:35,856 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2019-12-07 19:31:35,856 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-12-07 19:31:35,856 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2019-12-07 19:31:35,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-12-07 19:31:35,857 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:31:35,857 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:31:36,459 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 mathsat -unsat_core_generation=3,16 cvc4 --incremental --print-success --lang smt --rewrite-divk,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:31:36,459 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:31:36,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:31:36,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1087630003, now seen corresponding path program 6 times [2019-12-07 19:31:36,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:31:36,462 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46623398] [2019-12-07 19:31:36,462 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/mathsat Starting monitored process 18 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with mathsat -unsat_core_generation=3 [2019-12-07 19:31:36,550 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2019-12-07 19:31:36,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:31:36,554 WARN L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 52 conjunts are in the unsatisfiable core [2019-12-07 19:31:36,555 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:31:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-12-07 19:31:37,029 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:31:38,074 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:38,074 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:38,714 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:38,715 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:39,194 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:39,195 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:39,680 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:40,128 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:40,129 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:40,547 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:40,547 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:40,941 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:41,326 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:41,718 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:41,718 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:42,026 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:42,027 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:42,355 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:42,545 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-12-07 19:31:42,545 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46623398] [2019-12-07 19:31:42,545 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [772922783] [2019-12-07 19:31:42,545 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/cvc4 Starting monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 19:31:42,684 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2019-12-07 19:31:42,684 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:31:42,686 WARN L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 52 conjunts are in the unsatisfiable core [2019-12-07 19:31:42,687 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:31:42,751 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-12-07 19:31:42,751 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:31:43,503 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:43,504 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:43,934 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:43,934 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:44,222 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:44,468 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:44,468 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:44,675 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:44,916 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:45,124 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:45,124 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:45,240 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:45,240 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:45,326 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:45,326 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:45,383 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:45,384 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:45,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-12-07 19:31:45,434 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406569865] [2019-12-07 19:31:45,434 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:31:45,526 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2019-12-07 19:31:45,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:31:45,529 WARN L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 52 conjunts are in the unsatisfiable core [2019-12-07 19:31:45,530 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:31:45,592 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-12-07 19:31:45,593 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:31:46,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:46,311 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:46,782 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:47,062 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:47,308 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:47,518 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:47,519 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:48,179 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:48,817 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:48,936 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:48,936 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:49,027 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:49,028 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:49,088 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:49,088 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:49,115 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:49,115 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:49,147 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-12-07 19:31:49,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2019-12-07 19:31:49,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 39, 29, 39, 29, 39] total 66 [2019-12-07 19:31:49,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624622230] [2019-12-07 19:31:49,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-12-07 19:31:49,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 19:31:49,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-12-07 19:31:49,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=4057, Unknown=0, NotChecked=0, Total=4290 [2019-12-07 19:31:49,150 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 66 states. [2019-12-07 19:31:52,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:31:52,286 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2019-12-07 19:31:52,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-07 19:31:52,287 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 76 [2019-12-07 19:31:52,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:31:52,289 INFO L225 Difference]: With dead ends: 57 [2019-12-07 19:31:52,289 INFO L226 Difference]: Without dead ends: 51 [2019-12-07 19:31:52,291 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 359 SyntacticMatches, 27 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=710, Invalid=7846, Unknown=0, NotChecked=0, Total=8556 [2019-12-07 19:31:52,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-12-07 19:31:52,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-12-07 19:31:52,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-12-07 19:31:52,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2019-12-07 19:31:52,297 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 76 [2019-12-07 19:31:52,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:31:52,297 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2019-12-07 19:31:52,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-12-07 19:31:52,297 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2019-12-07 19:31:52,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-12-07 19:31:52,298 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:31:52,298 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:31:52,900 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 mathsat -unsat_core_generation=3,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 19:31:52,901 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:31:52,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:31:52,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1736651251, now seen corresponding path program 7 times [2019-12-07 19:31:52,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:31:52,903 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [892455530] [2019-12-07 19:31:52,903 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/mathsat Starting monitored process 21 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with mathsat -unsat_core_generation=3 [2019-12-07 19:31:52,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:31:52,991 WARN L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 60 conjunts are in the unsatisfiable core [2019-12-07 19:31:52,993 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:31:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-12-07 19:31:53,590 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:31:54,829 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:54,829 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:55,556 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:55,557 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:56,172 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:56,755 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:56,756 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:57,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:57,846 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:58,350 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:58,894 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:58,895 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:31:59,873 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:00,459 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:00,913 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:01,272 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:01,645 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:01,645 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:01,872 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-12-07 19:32:01,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [892455530] [2019-12-07 19:32:01,873 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [630022106] [2019-12-07 19:32:01,873 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/cvc4 Starting monitored process 22 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 19:32:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:32:02,046 WARN L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 60 conjunts are in the unsatisfiable core [2019-12-07 19:32:02,047 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:32:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-12-07 19:32:02,065 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:32:02,924 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:02,924 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:03,445 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:03,788 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:04,151 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:04,152 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:04,430 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:04,671 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:04,671 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:04,889 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:04,889 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:05,067 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:05,215 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:05,216 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:05,403 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:05,491 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:05,491 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:05,555 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:05,581 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:05,581 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-12-07 19:32:05,612 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585624123] [2019-12-07 19:32:05,612 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:32:05,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:32:05,708 WARN L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 60 conjunts are in the unsatisfiable core [2019-12-07 19:32:05,709 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:32:05,727 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-12-07 19:32:05,727 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:32:06,632 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:06,633 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:07,153 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:07,153 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:07,503 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:07,813 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:08,161 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:08,405 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:08,405 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:08,616 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:08,800 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:08,952 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:09,074 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:09,161 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:09,217 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:09,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:09,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:09,273 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-12-07 19:32:09,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2019-12-07 19:32:09,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 45, 33, 45, 33, 45] total 76 [2019-12-07 19:32:09,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375119238] [2019-12-07 19:32:09,274 INFO L442 AbstractCegarLoop]: Interpolant automaton has 76 states [2019-12-07 19:32:09,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 19:32:09,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2019-12-07 19:32:09,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=5429, Unknown=0, NotChecked=0, Total=5700 [2019-12-07 19:32:09,276 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 76 states. [2019-12-07 19:32:12,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:32:12,396 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2019-12-07 19:32:12,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-07 19:32:12,396 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 88 [2019-12-07 19:32:12,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:32:12,397 INFO L225 Difference]: With dead ends: 63 [2019-12-07 19:32:12,397 INFO L226 Difference]: Without dead ends: 57 [2019-12-07 19:32:12,400 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 430 SyntacticMatches, 18 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1747 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=882, Invalid=10460, Unknown=0, NotChecked=0, Total=11342 [2019-12-07 19:32:12,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-12-07 19:32:12,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-12-07 19:32:12,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-12-07 19:32:12,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2019-12-07 19:32:12,406 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 88 [2019-12-07 19:32:12,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:32:12,406 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2019-12-07 19:32:12,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 76 states. [2019-12-07 19:32:12,406 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2019-12-07 19:32:12,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-12-07 19:32:12,407 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:32:12,407 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:32:13,009 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 mathsat -unsat_core_generation=3,22 cvc4 --incremental --print-success --lang smt --rewrite-divk,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:32:13,009 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:32:13,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:32:13,010 INFO L82 PathProgramCache]: Analyzing trace with hash 2110158541, now seen corresponding path program 8 times [2019-12-07 19:32:13,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:32:13,011 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955113984] [2019-12-07 19:32:13,012 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/mathsat Starting monitored process 24 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with mathsat -unsat_core_generation=3 [2019-12-07 19:32:13,126 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 19:32:13,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:32:13,130 WARN L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 68 conjunts are in the unsatisfiable core [2019-12-07 19:32:13,132 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:32:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-12-07 19:32:13,855 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:32:15,262 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:15,262 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:16,187 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:16,187 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:16,854 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:17,692 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:18,341 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:18,341 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:19,302 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:20,152 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:20,153 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:20,781 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:20,781 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:21,342 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:21,343 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:21,872 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:21,873 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:22,558 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:23,054 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:23,604 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:24,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:24,495 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-12-07 19:32:24,757 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955113984] [2019-12-07 19:32:24,757 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2113821142] [2019-12-07 19:32:24,757 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/cvc4 Starting monitored process 25 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 19:32:24,976 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 19:32:24,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:32:24,977 WARN L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 68 conjunts are in the unsatisfiable core [2019-12-07 19:32:24,979 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:32:25,001 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-12-07 19:32:25,001 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:32:25,983 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:25,983 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:26,676 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:27,144 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:27,145 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:28,829 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:29,640 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:29,641 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:29,956 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:30,322 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:30,569 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:30,569 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:30,782 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:30,782 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:31,058 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:31,059 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:31,589 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:31,709 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:31,710 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:31,796 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:31,797 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:31,852 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:31,853 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:31,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:31,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:31,916 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-12-07 19:32:31,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757915809] [2019-12-07 19:32:31,916 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:32:32,058 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 19:32:32,058 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:32:32,061 WARN L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 68 conjunts are in the unsatisfiable core [2019-12-07 19:32:32,063 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:32:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-12-07 19:32:32,085 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:32:33,056 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:33,056 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:33,661 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:33,661 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:34,074 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:34,074 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:34,450 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:34,450 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:34,809 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:34,809 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:35,228 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:35,228 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:35,656 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:35,656 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:36,672 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:36,900 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:36,900 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:37,084 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:37,084 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:37,335 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:37,335 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:37,457 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:37,457 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:37,543 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:37,600 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:37,624 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:37,624 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-12-07 19:32:37,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2019-12-07 19:32:37,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 51, 37, 51, 37, 51] total 86 [2019-12-07 19:32:37,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775346069] [2019-12-07 19:32:37,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 86 states [2019-12-07 19:32:37,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 19:32:37,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2019-12-07 19:32:37,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=7001, Unknown=0, NotChecked=0, Total=7310 [2019-12-07 19:32:37,667 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 86 states. [2019-12-07 19:32:41,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:32:41,634 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2019-12-07 19:32:41,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-07 19:32:41,635 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 100 [2019-12-07 19:32:41,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:32:41,636 INFO L225 Difference]: With dead ends: 69 [2019-12-07 19:32:41,636 INFO L226 Difference]: Without dead ends: 63 [2019-12-07 19:32:41,638 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 629 GetRequests, 489 SyntacticMatches, 21 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2248 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1070, Invalid=13450, Unknown=0, NotChecked=0, Total=14520 [2019-12-07 19:32:41,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-12-07 19:32:41,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-12-07 19:32:41,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-12-07 19:32:41,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2019-12-07 19:32:41,643 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 100 [2019-12-07 19:32:41,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:32:41,643 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2019-12-07 19:32:41,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 86 states. [2019-12-07 19:32:41,643 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2019-12-07 19:32:41,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-12-07 19:32:41,645 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:32:41,645 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:32:42,246 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 cvc4 --incremental --print-success --lang smt --rewrite-divk,24 mathsat -unsat_core_generation=3 [2019-12-07 19:32:42,247 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:32:42,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:32:42,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1898639475, now seen corresponding path program 9 times [2019-12-07 19:32:42,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:32:42,249 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256028483] [2019-12-07 19:32:42,249 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/mathsat Starting monitored process 27 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with mathsat -unsat_core_generation=3 [2019-12-07 19:32:42,487 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-12-07 19:32:42,487 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:32:42,492 WARN L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 76 conjunts are in the unsatisfiable core [2019-12-07 19:32:42,494 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:32:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-12-07 19:32:43,653 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:32:45,277 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:45,277 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:46,147 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:46,931 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:47,676 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:48,404 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:49,123 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:49,820 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:49,820 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:50,489 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:50,490 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:51,167 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:51,811 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:51,811 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:52,436 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:52,436 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:53,042 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:53,042 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:53,654 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:53,654 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:54,208 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:54,209 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:54,723 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:54,723 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:55,170 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:55,666 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:55,954 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-12-07 19:32:55,954 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256028483] [2019-12-07 19:32:55,954 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1991035464] [2019-12-07 19:32:55,954 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/cvc4 Starting monitored process 28 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 19:32:56,241 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-12-07 19:32:56,241 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:32:56,243 WARN L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 77 conjunts are in the unsatisfiable core [2019-12-07 19:32:56,245 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:32:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 458 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2019-12-07 19:32:56,435 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:32:57,561 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:57,562 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:58,670 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:58,670 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:32:59,161 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:00,852 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:02,551 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:04,272 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:04,272 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:04,620 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:04,621 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:04,944 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:05,972 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:07,033 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:07,033 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:07,385 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:07,580 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:07,581 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:07,827 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:08,548 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:08,548 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:08,633 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:08,633 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:08,688 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:08,689 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:08,713 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:08,829 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-12-07 19:33:08,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802574346] [2019-12-07 19:33:08,830 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:33:09,023 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-12-07 19:33:09,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:33:09,027 WARN L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 76 conjunts are in the unsatisfiable core [2019-12-07 19:33:09,029 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:33:09,156 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-12-07 19:33:09,156 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:33:10,459 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:10,460 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:11,665 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:12,132 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:12,133 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:12,588 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:12,588 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:12,996 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:12,996 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:13,387 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:13,387 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:14,099 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:14,100 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:14,630 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:15,012 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:15,601 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:15,602 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:16,512 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:16,513 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:16,848 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:17,444 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:17,716 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:17,716 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:17,802 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:17,802 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:17,859 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:17,859 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:17,882 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-12-07 19:33:17,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2019-12-07 19:33:17,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 57, 42, 57, 41, 57] total 97 [2019-12-07 19:33:17,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928240639] [2019-12-07 19:33:17,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 97 states [2019-12-07 19:33:17,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 19:33:17,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2019-12-07 19:33:17,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=8944, Unknown=0, NotChecked=0, Total=9312 [2019-12-07 19:33:17,932 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 97 states. [2019-12-07 19:33:26,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:33:26,777 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2019-12-07 19:33:26,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-12-07 19:33:26,777 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 112 [2019-12-07 19:33:26,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:33:26,778 INFO L225 Difference]: With dead ends: 75 [2019-12-07 19:33:26,778 INFO L226 Difference]: Without dead ends: 69 [2019-12-07 19:33:26,780 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 542 SyntacticMatches, 29 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3132 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=1330, Invalid=17030, Unknown=0, NotChecked=0, Total=18360 [2019-12-07 19:33:26,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-07 19:33:26,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-12-07 19:33:26,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-12-07 19:33:26,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2019-12-07 19:33:26,784 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 112 [2019-12-07 19:33:26,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:33:26,785 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2019-12-07 19:33:26,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 97 states. [2019-12-07 19:33:26,785 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2019-12-07 19:33:26,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-12-07 19:33:26,786 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:33:26,786 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:33:27,387 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 mathsat -unsat_core_generation=3,28 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 19:33:27,388 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:33:27,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:33:27,389 INFO L82 PathProgramCache]: Analyzing trace with hash -2106288051, now seen corresponding path program 10 times [2019-12-07 19:33:27,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:33:27,390 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [506494582] [2019-12-07 19:33:27,390 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/mathsat Starting monitored process 30 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with mathsat -unsat_core_generation=3 [2019-12-07 19:33:27,589 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 19:33:27,589 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:33:27,594 WARN L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 84 conjunts are in the unsatisfiable core [2019-12-07 19:33:27,596 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:33:28,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-12-07 19:33:28,843 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:33:31,554 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:31,555 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:32,960 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:32,961 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:34,711 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:35,537 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:36,449 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:36,449 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:37,245 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:37,245 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:38,293 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:38,293 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:39,062 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:39,062 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:40,075 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:41,423 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:42,108 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:42,757 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:42,757 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:43,527 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:43,528 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:44,199 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:44,890 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:44,890 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:46,054 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:46,934 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:47,423 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:47,424 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:48,134 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-12-07 19:33:48,456 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [506494582] [2019-12-07 19:33:48,456 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2044263073] [2019-12-07 19:33:48,456 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/cvc4 Starting monitored process 31 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 19:33:48,799 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 19:33:48,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:33:48,801 WARN L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 84 conjunts are in the unsatisfiable core [2019-12-07 19:33:48,803 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:33:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-12-07 19:33:48,834 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:33:50,126 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:50,127 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:50,872 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:50,873 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:51,415 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:51,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:52,453 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:52,454 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:53,024 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:53,024 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:53,435 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:53,435 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:53,806 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:53,807 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:54,148 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:54,551 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:54,837 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:54,837 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:55,081 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:55,292 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:55,292 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:55,573 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:55,573 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:55,734 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:55,899 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:55,899 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:55,984 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:56,041 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:56,064 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:56,064 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:56,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-12-07 19:33:56,119 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986131181] [2019-12-07 19:33:56,119 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:33:56,347 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 19:33:56,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:33:56,350 WARN L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 84 conjunts are in the unsatisfiable core [2019-12-07 19:33:56,352 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:33:56,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-12-07 19:33:56,383 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:33:57,604 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:57,604 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:58,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:58,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:59,033 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:59,034 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:59,532 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:00,057 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:00,496 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:00,497 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:00,907 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:00,907 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:01,284 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:01,284 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:01,625 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:01,625 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:01,950 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:01,950 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:02,549 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:02,549 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:03,490 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:03,873 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:03,873 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:04,051 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:04,052 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:04,205 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:04,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:04,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:04,511 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:04,512 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:04,675 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:04,699 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:04,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-12-07 19:34:04,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2019-12-07 19:34:04,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 63, 45, 63, 45, 63] total 106 [2019-12-07 19:34:04,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487786422] [2019-12-07 19:34:04,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 106 states [2019-12-07 19:34:04,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 19:34:04,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2019-12-07 19:34:04,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=10745, Unknown=0, NotChecked=0, Total=11130 [2019-12-07 19:34:04,757 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 106 states. [2019-12-07 19:34:10,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:34:10,000 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2019-12-07 19:34:10,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-12-07 19:34:10,001 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 124 [2019-12-07 19:34:10,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:34:10,002 INFO L225 Difference]: With dead ends: 81 [2019-12-07 19:34:10,002 INFO L226 Difference]: Without dead ends: 75 [2019-12-07 19:34:10,004 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 612 SyntacticMatches, 22 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3448 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=1494, Invalid=20558, Unknown=0, NotChecked=0, Total=22052 [2019-12-07 19:34:10,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-12-07 19:34:10,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-12-07 19:34:10,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-12-07 19:34:10,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2019-12-07 19:34:10,009 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 124 [2019-12-07 19:34:10,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:34:10,009 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2019-12-07 19:34:10,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 106 states. [2019-12-07 19:34:10,009 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2019-12-07 19:34:10,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-12-07 19:34:10,010 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:34:10,011 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:34:10,612 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 mathsat -unsat_core_generation=3,31 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 19:34:10,613 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:34:10,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:34:10,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1718685965, now seen corresponding path program 11 times [2019-12-07 19:34:10,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:34:10,614 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995166819] [2019-12-07 19:34:10,615 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/mathsat Starting monitored process 33 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with mathsat -unsat_core_generation=3 [2019-12-07 19:34:10,909 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-12-07 19:34:10,910 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:34:10,915 WARN L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 92 conjunts are in the unsatisfiable core [2019-12-07 19:34:10,917 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:34:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-12-07 19:34:14,214 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:34:16,572 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:16,574 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:17,660 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:19,097 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:21,526 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:21,527 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:22,566 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:22,566 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:23,454 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:23,455 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:24,318 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:24,318 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:25,128 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:25,938 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:25,938 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:26,739 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:27,511 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:28,266 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:29,030 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:29,030 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:29,735 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:29,735 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:30,455 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:30,456 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:31,136 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:31,136 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:31,793 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:32,410 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:32,410 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:33,037 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:33,561 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:33,562 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:34,120 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:34,120 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:34,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-12-07 19:34:34,461 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995166819] [2019-12-07 19:34:34,461 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [946910877] [2019-12-07 19:34:34,461 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/cvc4 Starting monitored process 34 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 19:34:34,910 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-12-07 19:34:34,910 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:34:34,913 WARN L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 92 conjunts are in the unsatisfiable core [2019-12-07 19:34:34,914 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:34:35,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-12-07 19:34:35,029 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:34:36,479 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:36,479 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:37,330 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:37,331 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:38,693 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:38,693 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:39,292 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:39,292 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:39,866 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:39,866 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:41,171 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:41,671 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:41,671 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:42,140 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:42,637 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:42,637 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:43,009 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:43,009 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:43,349 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:43,654 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:43,952 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:44,200 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:44,417 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:44,603 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:44,603 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:44,751 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:44,871 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:45,083 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:45,083 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:45,140 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:45,140 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:45,164 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-12-07 19:34:45,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481461904] [2019-12-07 19:34:45,230 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:34:45,540 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-12-07 19:34:45,540 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:34:45,544 WARN L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 92 conjunts are in the unsatisfiable core [2019-12-07 19:34:45,546 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:34:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-12-07 19:34:45,657 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:34:47,631 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:47,632 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:48,522 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:48,522 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:49,197 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:49,197 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:49,803 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:50,512 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:51,123 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:51,123 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:51,846 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:51,846 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:52,441 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:52,900 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:52,900 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:53,542 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:53,543 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:54,201 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:54,201 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:54,514 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:54,802 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:54,803 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:55,055 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:55,275 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:55,275 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:55,540 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:55,540 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:55,748 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:55,922 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:56,117 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:56,304 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:56,305 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:56,389 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:34:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-12-07 19:34:56,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2019-12-07 19:34:56,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 69, 49, 69, 49, 69] total 116 [2019-12-07 19:34:56,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526995034] [2019-12-07 19:34:56,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 116 states [2019-12-07 19:34:56,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 19:34:56,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2019-12-07 19:34:56,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=12917, Unknown=0, NotChecked=0, Total=13340 [2019-12-07 19:34:56,483 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 116 states. [2019-12-07 19:35:06,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:35:06,882 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2019-12-07 19:35:06,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-12-07 19:35:06,883 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 136 [2019-12-07 19:35:06,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:35:06,883 INFO L225 Difference]: With dead ends: 87 [2019-12-07 19:35:06,883 INFO L226 Difference]: Without dead ends: 81 [2019-12-07 19:35:06,885 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 857 GetRequests, 667 SyntacticMatches, 29 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4207 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=1730, Invalid=24676, Unknown=0, NotChecked=0, Total=26406 [2019-12-07 19:35:06,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-12-07 19:35:06,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-12-07 19:35:06,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-12-07 19:35:06,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2019-12-07 19:35:06,889 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 136 [2019-12-07 19:35:06,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:35:06,889 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2019-12-07 19:35:06,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 116 states. [2019-12-07 19:35:06,889 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2019-12-07 19:35:06,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-12-07 19:35:06,890 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:35:06,890 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:35:07,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 cvc4 --incremental --print-success --lang smt --rewrite-divk,33 mathsat -unsat_core_generation=3 [2019-12-07 19:35:07,492 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:35:07,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:35:07,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1603697101, now seen corresponding path program 12 times [2019-12-07 19:35:07,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:35:07,494 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1338193222] [2019-12-07 19:35:07,494 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/mathsat Starting monitored process 36 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with mathsat -unsat_core_generation=3 [2019-12-07 19:35:07,926 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2019-12-07 19:35:07,926 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:35:07,932 WARN L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 100 conjunts are in the unsatisfiable core [2019-12-07 19:35:07,934 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:35:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2019-12-07 19:35:09,375 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:35:11,502 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:11,503 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:12,665 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:13,686 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:13,686 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:14,880 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:14,880 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:16,568 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:17,861 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:17,862 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:19,128 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:20,018 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:20,018 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:20,908 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:21,783 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:21,783 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:22,625 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:22,625 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:23,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:23,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:24,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:24,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:25,109 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:25,925 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:26,683 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:26,683 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:27,423 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:27,423 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:28,326 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:28,326 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:29,269 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:29,270 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:30,372 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:30,372 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:31,146 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:31,147 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:31,704 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:32,348 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:32,348 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:33,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-12-07 19:35:33,033 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1338193222] [2019-12-07 19:35:33,033 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [356800857] [2019-12-07 19:35:33,033 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/cvc4 Starting monitored process 37 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 19:35:33,610 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2019-12-07 19:35:33,611 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:35:33,613 WARN L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 100 conjunts are in the unsatisfiable core [2019-12-07 19:35:33,615 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:35:33,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2019-12-07 19:35:33,656 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:35:35,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:35,251 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:36,180 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:36,181 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:36,852 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:36,852 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:37,559 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:37,559 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:38,165 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:38,730 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:39,351 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:39,351 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:39,901 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:40,808 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:40,809 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:41,574 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:41,574 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:42,200 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:42,945 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:42,945 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:43,289 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:43,607 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:43,885 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:44,136 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:44,136 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:44,352 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:44,539 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:44,539 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:44,688 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:44,688 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:44,807 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:44,807 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:44,893 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:45,085 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:45,109 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:45,110 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-12-07 19:35:45,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891543363] [2019-12-07 19:35:45,206 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:35:45,612 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2019-12-07 19:35:45,612 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:35:45,616 WARN L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 100 conjunts are in the unsatisfiable core [2019-12-07 19:35:45,618 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:35:45,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2019-12-07 19:35:45,728 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:35:47,529 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:47,529 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:48,557 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:48,557 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:49,228 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:49,933 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:49,933 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:50,540 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:50,540 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:51,135 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:51,136 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:51,739 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:51,739 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:52,253 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:52,253 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:52,728 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:53,173 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:53,174 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:53,599 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:53,599 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:53,977 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:53,977 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:54,321 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:54,750 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:54,751 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:55,036 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:55,037 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:55,290 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:55,504 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:55,703 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:55,866 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:55,866 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:55,986 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:56,072 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:56,072 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:56,322 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:56,393 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:35:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-12-07 19:35:56,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2019-12-07 19:35:56,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 75, 53, 75, 53, 75] total 126 [2019-12-07 19:35:56,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755520910] [2019-12-07 19:35:56,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 126 states [2019-12-07 19:35:56,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 19:35:56,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2019-12-07 19:35:56,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=15289, Unknown=0, NotChecked=0, Total=15750 [2019-12-07 19:35:56,522 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 126 states. [2019-12-07 19:36:03,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:36:03,688 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2019-12-07 19:36:03,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-12-07 19:36:03,689 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 148 [2019-12-07 19:36:03,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:36:03,689 INFO L225 Difference]: With dead ends: 93 [2019-12-07 19:36:03,689 INFO L226 Difference]: Without dead ends: 87 [2019-12-07 19:36:03,690 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 933 GetRequests, 714 SyntacticMatches, 44 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5182 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=1982, Invalid=29170, Unknown=0, NotChecked=0, Total=31152 [2019-12-07 19:36:03,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-07 19:36:03,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2019-12-07 19:36:03,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-12-07 19:36:03,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2019-12-07 19:36:03,694 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 148 [2019-12-07 19:36:03,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:36:03,695 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2019-12-07 19:36:03,695 INFO L463 AbstractCegarLoop]: Interpolant automaton has 126 states. [2019-12-07 19:36:03,695 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2019-12-07 19:36:03,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-12-07 19:36:03,696 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:36:03,696 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:36:04,297 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 cvc4 --incremental --print-success --lang smt --rewrite-divk,36 mathsat -unsat_core_generation=3 [2019-12-07 19:36:04,298 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:36:04,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:36:04,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1773195917, now seen corresponding path program 13 times [2019-12-07 19:36:04,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:36:04,299 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1878362316] [2019-12-07 19:36:04,300 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/mathsat Starting monitored process 39 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with mathsat -unsat_core_generation=3 [2019-12-07 19:36:04,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:36:04,743 WARN L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 108 conjunts are in the unsatisfiable core [2019-12-07 19:36:04,744 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:36:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2019-12-07 19:36:06,391 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:36:11,496 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:11,496 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:12,796 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:12,796 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:14,092 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:14,092 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:15,209 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:15,209 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:16,291 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:17,709 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:18,736 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:18,736 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:19,787 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:19,787 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:21,255 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:21,255 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:22,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:23,500 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:23,500 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:24,458 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:24,458 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:25,405 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:26,301 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:26,301 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:27,207 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:27,208 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:28,120 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:28,985 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:29,817 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:30,619 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:30,619 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:31,499 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:31,499 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:32,254 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:32,254 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:33,002 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:33,962 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:34,540 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:34,541 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:35,329 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:35,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 1575 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-12-07 19:36:35,759 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1878362316] [2019-12-07 19:36:35,759 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [205976508] [2019-12-07 19:36:35,759 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/cvc4 Starting monitored process 40 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 19:36:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:36:36,434 WARN L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 108 conjunts are in the unsatisfiable core [2019-12-07 19:36:36,436 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:36:36,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2019-12-07 19:36:36,589 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:36:38,458 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:38,458 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:40,548 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:41,648 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:42,381 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:42,381 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:43,090 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:43,090 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:43,988 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:44,705 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:44,705 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:45,495 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:46,435 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:47,399 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:47,399 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:47,955 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:47,955 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:48,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:49,093 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:49,521 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:49,521 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:49,889 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:50,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:50,547 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:50,547 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:50,800 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:51,012 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:51,195 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:51,195 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:51,347 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:51,783 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:52,019 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:52,019 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:52,227 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:52,254 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:52,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 1575 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-12-07 19:36:52,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454656675] [2019-12-07 19:36:52,354 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:36:52,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:36:52,816 WARN L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 108 conjunts are in the unsatisfiable core [2019-12-07 19:36:52,818 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:36:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2019-12-07 19:36:52,904 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:36:54,572 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:54,573 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:56,027 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:56,028 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:57,321 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:57,322 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:58,531 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:58,532 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:36:59,626 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:00,640 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:00,640 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:01,528 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:02,104 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:02,661 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:03,150 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:03,626 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:03,627 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:04,062 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:04,469 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:04,469 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:04,848 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:04,848 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:05,196 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:05,507 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:05,507 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:05,781 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:06,020 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:06,230 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:06,412 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:06,412 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:06,578 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:06,578 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:06,713 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:06,815 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:06,815 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:06,869 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:06,893 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:06,893 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 1575 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-12-07 19:37:06,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2019-12-07 19:37:06,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 81, 57, 81, 57, 81] total 136 [2019-12-07 19:37:06,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33044064] [2019-12-07 19:37:06,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 136 states [2019-12-07 19:37:06,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 19:37:06,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2019-12-07 19:37:06,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=17861, Unknown=0, NotChecked=0, Total=18360 [2019-12-07 19:37:06,991 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 136 states. [2019-12-07 19:37:17,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:37:17,116 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2019-12-07 19:37:17,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-12-07 19:37:17,117 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 160 [2019-12-07 19:37:17,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:37:17,118 INFO L225 Difference]: With dead ends: 99 [2019-12-07 19:37:17,118 INFO L226 Difference]: Without dead ends: 93 [2019-12-07 19:37:17,119 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1009 GetRequests, 773 SyntacticMatches, 47 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5862 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=2250, Invalid=34040, Unknown=0, NotChecked=0, Total=36290 [2019-12-07 19:37:17,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-12-07 19:37:17,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2019-12-07 19:37:17,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-07 19:37:17,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2019-12-07 19:37:17,125 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 160 [2019-12-07 19:37:17,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:37:17,125 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2019-12-07 19:37:17,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 136 states. [2019-12-07 19:37:17,125 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2019-12-07 19:37:17,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-12-07 19:37:17,126 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:37:17,126 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:37:17,727 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 mathsat -unsat_core_generation=3,40 cvc4 --incremental --print-success --lang smt --rewrite-divk,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:37:17,728 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:37:17,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:37:17,729 INFO L82 PathProgramCache]: Analyzing trace with hash 395057997, now seen corresponding path program 14 times [2019-12-07 19:37:17,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:37:17,730 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1116062128] [2019-12-07 19:37:17,731 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/mathsat Starting monitored process 42 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with mathsat -unsat_core_generation=3 [2019-12-07 19:37:18,254 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 19:37:18,254 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:37:18,261 WARN L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 116 conjunts are in the unsatisfiable core [2019-12-07 19:37:18,263 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:37:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2019-12-07 19:37:20,378 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:37:24,103 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:24,104 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:25,573 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:26,737 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:27,894 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:27,894 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:29,357 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:29,357 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:30,543 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:31,667 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:31,668 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:32,759 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:34,468 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:34,469 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:35,536 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:35,536 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:36,591 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:36,591 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:37,598 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:38,817 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:38,818 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:39,799 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:40,760 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:40,760 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:41,681 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:41,681 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:42,654 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:43,874 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:44,923 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:46,060 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:47,365 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:48,221 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:48,221 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:48,995 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:48,995 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:49,739 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:50,546 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:50,546 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:51,175 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:51,910 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:51,910 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:52,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1836 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2019-12-07 19:37:52,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1116062128] [2019-12-07 19:37:52,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [951323306] [2019-12-07 19:37:52,365 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/cvc4 Starting monitored process 43 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 19:37:53,177 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 19:37:53,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:37:53,180 WARN L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 116 conjunts are in the unsatisfiable core [2019-12-07 19:37:53,182 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:37:53,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2019-12-07 19:37:53,320 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:37:55,121 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:55,121 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:56,245 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:56,245 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:57,042 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:57,909 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:58,649 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:58,649 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:37:59,458 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:00,456 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:00,457 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:01,614 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:01,614 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:02,776 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:03,768 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:03,768 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:04,313 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:04,314 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:04,821 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:04,822 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:05,303 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:05,304 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:05,736 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:06,301 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:06,302 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:06,705 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:07,067 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:07,376 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:07,647 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:07,647 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:07,891 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:07,892 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:08,104 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:08,438 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:08,598 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:08,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:08,965 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:09,169 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:09,170 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:09,194 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1836 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2019-12-07 19:38:09,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120908587] [2019-12-07 19:38:09,295 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:38:09,842 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 19:38:09,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:38:09,847 WARN L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 116 conjunts are in the unsatisfiable core [2019-12-07 19:38:09,849 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:38:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2019-12-07 19:38:10,040 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:38:11,873 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:11,873 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:12,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:12,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:13,780 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:13,781 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:14,657 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:14,657 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:15,382 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:15,383 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:16,092 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:16,093 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:16,875 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:16,875 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:17,612 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:17,613 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:18,901 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:20,307 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:20,307 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:20,971 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:21,500 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:21,501 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:22,328 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:23,532 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:23,944 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:23,944 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:24,333 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:24,682 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:25,125 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:25,410 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:25,652 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:25,869 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:26,055 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:26,055 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:26,209 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:26,209 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:26,329 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:26,583 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:26,641 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:26,641 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:26,665 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1836 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2019-12-07 19:38:26,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2019-12-07 19:38:26,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 87, 61, 87, 61, 87] total 146 [2019-12-07 19:38:26,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932936534] [2019-12-07 19:38:26,771 INFO L442 AbstractCegarLoop]: Interpolant automaton has 146 states [2019-12-07 19:38:26,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 19:38:26,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2019-12-07 19:38:26,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=20633, Unknown=0, NotChecked=0, Total=21170 [2019-12-07 19:38:26,772 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 146 states. [2019-12-07 19:38:42,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:38:42,740 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2019-12-07 19:38:42,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-12-07 19:38:42,741 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 172 [2019-12-07 19:38:42,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:38:42,742 INFO L225 Difference]: With dead ends: 105 [2019-12-07 19:38:42,742 INFO L226 Difference]: Without dead ends: 99 [2019-12-07 19:38:42,745 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1085 GetRequests, 843 SyntacticMatches, 39 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7090 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=2534, Invalid=39286, Unknown=0, NotChecked=0, Total=41820 [2019-12-07 19:38:42,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-12-07 19:38:42,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2019-12-07 19:38:42,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-07 19:38:42,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2019-12-07 19:38:42,749 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 172 [2019-12-07 19:38:42,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:38:42,749 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2019-12-07 19:38:42,750 INFO L463 AbstractCegarLoop]: Interpolant automaton has 146 states. [2019-12-07 19:38:42,750 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2019-12-07 19:38:42,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-12-07 19:38:42,751 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:38:42,751 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:38:43,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 mathsat -unsat_core_generation=3,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 19:38:43,353 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:38:43,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:38:43,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1391744013, now seen corresponding path program 15 times [2019-12-07 19:38:43,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:38:43,355 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [539739866] [2019-12-07 19:38:43,355 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/mathsat Starting monitored process 45 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with mathsat -unsat_core_generation=3 [2019-12-07 19:38:43,985 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2019-12-07 19:38:43,985 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:38:43,993 WARN L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 124 conjunts are in the unsatisfiable core [2019-12-07 19:38:43,995 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:38:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2019-12-07 19:38:46,151 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:38:48,816 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:48,816 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:50,366 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:50,366 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:52,469 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:52,470 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:53,869 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:55,249 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:56,624 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:57,836 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:57,836 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:59,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:38:59,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:00,205 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:00,205 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:01,356 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:02,856 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:02,856 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:04,299 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:05,397 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:06,479 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:06,479 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:07,537 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:08,597 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:09,630 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:10,697 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:11,690 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:13,065 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:14,037 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:14,037 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:14,947 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:14,947 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:15,831 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:15,831 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:16,717 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:17,578 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:17,578 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:18,767 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:19,581 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:19,581 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:20,288 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:21,036 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 2117 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2019-12-07 19:39:21,531 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [539739866] [2019-12-07 19:39:21,531 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [361307719] [2019-12-07 19:39:21,531 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/cvc4 Starting monitored process 46 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 19:39:22,599 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2019-12-07 19:39:22,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:39:22,604 WARN L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 124 conjunts are in the unsatisfiable core [2019-12-07 19:39:22,606 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:39:22,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2019-12-07 19:39:22,885 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:39:24,827 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:24,827 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:26,106 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:26,106 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:27,052 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:27,052 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:27,882 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:27,882 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:28,679 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:29,462 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:29,463 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:31,020 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:31,020 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:31,911 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:31,912 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:32,727 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:33,387 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:33,388 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:34,532 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:34,532 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:35,649 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:36,213 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:37,206 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:38,753 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:38,753 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:39,475 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:40,061 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:40,432 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:40,801 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:41,106 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:41,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:41,409 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:41,755 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:41,755 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:41,990 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:41,990 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:42,175 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:42,327 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:42,447 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:42,539 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:42,592 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:42,593 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:42,618 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:42,618 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:42,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 2117 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2019-12-07 19:39:42,741 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848424998] [2019-12-07 19:39:42,741 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:39:43,456 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2019-12-07 19:39:43,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:39:43,462 WARN L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 124 conjunts are in the unsatisfiable core [2019-12-07 19:39:43,463 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:39:43,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2019-12-07 19:39:43,648 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:39:46,522 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:46,523 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:48,276 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:49,161 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:50,024 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:51,067 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:51,067 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:52,735 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:52,735 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:53,561 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:53,562 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:54,761 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:55,429 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:56,179 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:56,917 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:57,481 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:57,481 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:58,211 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:59,378 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:59,858 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:39:59,859 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:40:00,933 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:40:01,592 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:40:01,592 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:40:01,973 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:40:02,671 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:40:02,672 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:40:03,360 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:40:03,360 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:40:04,605 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:40:04,875 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:40:05,509 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:40:05,701 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:40:05,851 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:40:05,851 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:40:05,974 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:40:05,974 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:40:06,065 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:40:06,287 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:40:06,312 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:40:06,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 2117 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2019-12-07 19:40:06,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2019-12-07 19:40:06,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 93, 65, 93, 65, 93] total 156 [2019-12-07 19:40:06,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114765462] [2019-12-07 19:40:06,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 156 states [2019-12-07 19:40:06,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 19:40:06,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2019-12-07 19:40:06,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=23605, Unknown=0, NotChecked=0, Total=24180 [2019-12-07 19:40:06,439 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 156 states. [2019-12-07 19:40:23,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:40:23,333 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2019-12-07 19:40:23,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-12-07 19:40:23,333 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 184 [2019-12-07 19:40:23,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:40:23,334 INFO L225 Difference]: With dead ends: 111 [2019-12-07 19:40:23,334 INFO L226 Difference]: Without dead ends: 105 [2019-12-07 19:40:23,336 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1161 GetRequests, 908 SyntacticMatches, 36 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8043 ImplicationChecksByTransitivity, 33.7s TimeCoverageRelationStatistics Valid=2834, Invalid=44908, Unknown=0, NotChecked=0, Total=47742 [2019-12-07 19:40:23,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-07 19:40:23,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2019-12-07 19:40:23,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-12-07 19:40:23,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2019-12-07 19:40:23,340 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 184 [2019-12-07 19:40:23,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:40:23,340 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2019-12-07 19:40:23,340 INFO L463 AbstractCegarLoop]: Interpolant automaton has 156 states. [2019-12-07 19:40:23,340 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2019-12-07 19:40:23,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-12-07 19:40:23,341 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:40:23,342 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:40:23,943 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 mathsat -unsat_core_generation=3,46 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 19:40:23,943 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:40:23,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:40:23,944 INFO L82 PathProgramCache]: Analyzing trace with hash 481656013, now seen corresponding path program 16 times [2019-12-07 19:40:23,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:40:23,946 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1507120755] [2019-12-07 19:40:23,946 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/mathsat Starting monitored process 48 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with mathsat -unsat_core_generation=3 [2019-12-07 19:40:24,691 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 19:40:24,691 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-12-07 19:40:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 19:40:24,786 INFO L174 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2019-12-07 19:40:24,787 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 19:40:24,987 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 mathsat -unsat_core_generation=3 [2019-12-07 19:40:25,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 07:40:25 BoogieIcfgContainer [2019-12-07 19:40:25,035 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 19:40:25,035 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 19:40:25,035 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 19:40:25,035 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 19:40:25,036 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:31:05" (3/4) ... [2019-12-07 19:40:25,037 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 19:40:25,078 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5facc5ec-6d51-4722-94f1-b68d5aa0213c/bin/utaipan/witness.graphml [2019-12-07 19:40:25,078 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 19:40:25,080 INFO L168 Benchmark]: Toolchain (without parser) took 559499.32 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 98.6 MB). Free memory was 952.4 MB in the beginning and 950.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 100.6 MB. Max. memory is 11.5 GB. [2019-12-07 19:40:25,080 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:40:25,080 INFO L168 Benchmark]: CACSL2BoogieTranslator took 140.17 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-12-07 19:40:25,080 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.79 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:40:25,081 INFO L168 Benchmark]: Boogie Preprocessor took 40.07 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 99.6 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -147.5 MB). Peak memory consumption was 15.4 MB. Max. memory is 11.5 GB. [2019-12-07 19:40:25,081 INFO L168 Benchmark]: RCFGBuilder took 142.39 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. [2019-12-07 19:40:25,081 INFO L168 Benchmark]: TraceAbstraction took 559110.21 ms. Allocated memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -1.0 MB). Free memory was 1.1 GB in the beginning and 956.8 MB in the end (delta: 114.4 MB). Peak memory consumption was 440.0 MB. Max. memory is 11.5 GB. [2019-12-07 19:40:25,081 INFO L168 Benchmark]: Witness Printer took 43.22 ms. Allocated memory is still 1.1 GB. Free memory was 956.8 MB in the beginning and 950.3 MB in the end (delta: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. [2019-12-07 19:40:25,083 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 140.17 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.79 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 40.07 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 99.6 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -147.5 MB). Peak memory consumption was 15.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 142.39 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 559110.21 ms. Allocated memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -1.0 MB). Free memory was 1.1 GB in the beginning and 956.8 MB in the end (delta: 114.4 MB). Peak memory consumption was 440.0 MB. Max. memory is 11.5 GB. * Witness Printer took 43.22 ms. Allocated memory is still 1.1 GB. Free memory was 956.8 MB in the beginning and 950.3 MB in the end (delta: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 34]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L25] int n = __VERIFIER_nondet_int(); [L26] COND FALSE !(n < 1) [L29] CALL, EXPR hanoi(n) VAL [\old(n)=32] [L17] COND FALSE !(n == 1) VAL [\old(n)=32, n=32] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=31] [L17] COND FALSE !(n == 1) VAL [\old(n)=31, n=31] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=30] [L17] COND FALSE !(n == 1) VAL [\old(n)=30, n=30] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=29] [L17] COND FALSE !(n == 1) VAL [\old(n)=29, n=29] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=28] [L17] COND FALSE !(n == 1) VAL [\old(n)=28, n=28] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=27] [L17] COND FALSE !(n == 1) VAL [\old(n)=27, n=27] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=26] [L17] COND FALSE !(n == 1) VAL [\old(n)=26, n=26] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=25] [L17] COND FALSE !(n == 1) VAL [\old(n)=25, n=25] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=24] [L17] COND FALSE !(n == 1) VAL [\old(n)=24, n=24] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=23] [L17] COND FALSE !(n == 1) VAL [\old(n)=23, n=23] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=22] [L17] COND FALSE !(n == 1) VAL [\old(n)=22, n=22] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=21] [L17] COND FALSE !(n == 1) VAL [\old(n)=21, n=21] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=20] [L17] COND FALSE !(n == 1) VAL [\old(n)=20, n=20] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=19] [L17] COND FALSE !(n == 1) VAL [\old(n)=19, n=19] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=18] [L17] COND FALSE !(n == 1) VAL [\old(n)=18, n=18] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=17] [L17] COND FALSE !(n == 1) VAL [\old(n)=17, n=17] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=16] [L17] COND FALSE !(n == 1) VAL [\old(n)=16, n=16] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=15] [L17] COND FALSE !(n == 1) VAL [\old(n)=15, n=15] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=14] [L17] COND FALSE !(n == 1) VAL [\old(n)=14, n=14] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=13] [L17] COND FALSE !(n == 1) VAL [\old(n)=13, n=13] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=12] [L17] COND FALSE !(n == 1) VAL [\old(n)=12, n=12] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=11] [L17] COND FALSE !(n == 1) VAL [\old(n)=11, n=11] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=10] [L17] COND FALSE !(n == 1) VAL [\old(n)=10, n=10] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=9] [L17] COND FALSE !(n == 1) VAL [\old(n)=9, n=9] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=8] [L17] COND FALSE !(n == 1) VAL [\old(n)=8, n=8] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=7] [L17] COND FALSE !(n == 1) VAL [\old(n)=7, n=7] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=6] [L17] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=5] [L17] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=4] [L17] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=3] [L17] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=2] [L17] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=1] [L17] COND TRUE n == 1 [L18] return 1; VAL [\old(n)=1, \result=1, n=1] [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=2, hanoi(n-1)=1, n=2] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=3, hanoi(n-1)=3, n=3] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=4, hanoi(n-1)=7, n=4] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=5, hanoi(n-1)=15, n=5] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=6, hanoi(n-1)=31, n=6] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=7, hanoi(n-1)=63, n=7] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=8, hanoi(n-1)=127, n=8] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=9, hanoi(n-1)=255, n=9] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=10, hanoi(n-1)=511, n=10] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=11, hanoi(n-1)=1023, n=11] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=12, hanoi(n-1)=2047, n=12] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=13, hanoi(n-1)=4095, n=13] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=14, hanoi(n-1)=8191, n=14] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=15, hanoi(n-1)=16383, n=15] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=16, hanoi(n-1)=32767, n=16] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=17, hanoi(n-1)=65535, n=17] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=18, hanoi(n-1)=131071, n=18] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=19, hanoi(n-1)=262143, n=19] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=20, hanoi(n-1)=524287, n=20] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=21, hanoi(n-1)=1048575, n=21] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=22, hanoi(n-1)=2097151, n=22] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=23, hanoi(n-1)=4194303, n=23] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=24, hanoi(n-1)=8388607, n=24] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=25, hanoi(n-1)=16777215, n=25] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=26, hanoi(n-1)=33554431, n=26] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=27, hanoi(n-1)=67108863, n=27] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=28, hanoi(n-1)=134217727, n=28] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=29, hanoi(n-1)=268435455, n=29] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=30, hanoi(n-1)=536870911, n=30] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=31, hanoi(n-1)=1073741823, n=31] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=32, hanoi(n-1)=2147483647, n=32] [L20] return 2 * (hanoi(n-1)) + 1; [L29] RET, EXPR hanoi(n) [L29] unsigned result = hanoi(n); [L31] COND FALSE !(result+1>0 && result+1 == 1<