./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i10_o10-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i10_o10-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/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 d354f5dc1a4e4616bf2c7c7fc4888805a134a8dd .................................................................................................................................................................................................................................................................................................... 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_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i10_o10-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/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 d354f5dc1a4e4616bf2c7c7fc4888805a134a8dd ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-26 02:47:43,712 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:47:43,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:47:43,728 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:47:43,728 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:47:43,729 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:47:43,731 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:47:43,739 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:47:43,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:47:43,747 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:47:43,747 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:47:43,749 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:47:43,749 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:47:43,751 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:47:43,752 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:47:43,752 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:47:43,753 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:47:43,754 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:47:43,756 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:47:43,760 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:47:43,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:47:43,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:47:43,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:47:43,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:47:43,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:47:43,771 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:47:43,771 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:47:43,773 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:47:43,773 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:47:43,774 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:47:43,774 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:47:43,775 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:47:43,776 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:47:43,776 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:47:43,777 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:47:43,777 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:47:43,778 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:47:43,778 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:47:43,778 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:47:43,779 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:47:43,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:47:43,780 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 02:47:43,814 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:47:43,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:47:43,815 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:47:43,815 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:47:43,816 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:47:43,816 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:47:43,816 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:47:43,816 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:47:43,816 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:47:43,816 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:47:43,817 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:47:43,817 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:47:43,817 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:47:43,817 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:47:43,817 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:47:43,818 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:47:43,818 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:47:43,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:47:43,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:47:43,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:47:43,819 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:47:43,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:47:43,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:47:43,819 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:47:43,819 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:47:43,819 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:47:43,820 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:47:43,820 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:47:43,820 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:47:43,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:47:43,820 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:47:43,821 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:47:43,821 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:47:43,821 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:47:43,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:47:43,821 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:47:43,821 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:47:43,822 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_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/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 -> d354f5dc1a4e4616bf2c7c7fc4888805a134a8dd [2019-11-26 02:47:43,987 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:47:44,001 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:47:44,004 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:47:44,005 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:47:44,005 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:47:44,006 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/../../sv-benchmarks/c/recursive-simple/id_i10_o10-2.c [2019-11-26 02:47:44,065 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/data/678f946a1/bdea0638de364eb696c05bfa7c7021f7/FLAG3f2015a45 [2019-11-26 02:47:44,456 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:47:44,457 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/sv-benchmarks/c/recursive-simple/id_i10_o10-2.c [2019-11-26 02:47:44,462 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/data/678f946a1/bdea0638de364eb696c05bfa7c7021f7/FLAG3f2015a45 [2019-11-26 02:47:44,838 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/data/678f946a1/bdea0638de364eb696c05bfa7c7021f7 [2019-11-26 02:47:44,841 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:47:44,842 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:47:44,843 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:47:44,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:47:44,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:47:44,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:47:44" (1/1) ... [2019-11-26 02:47:44,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70d9b7e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:47:44, skipping insertion in model container [2019-11-26 02:47:44,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:47:44" (1/1) ... [2019-11-26 02:47:44,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:47:44,870 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:47:45,009 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:47:45,012 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:47:45,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:47:45,098 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:47:45,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:47:45 WrapperNode [2019-11-26 02:47:45,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:47:45,100 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:47:45,100 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:47:45,101 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:47:45,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:47:45" (1/1) ... [2019-11-26 02:47:45,113 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:47:45" (1/1) ... [2019-11-26 02:47:45,126 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:47:45,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:47:45,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:47:45,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:47:45,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:47:45" (1/1) ... [2019-11-26 02:47:45,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:47:45" (1/1) ... [2019-11-26 02:47:45,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:47:45" (1/1) ... [2019-11-26 02:47:45,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:47:45" (1/1) ... [2019-11-26 02:47:45,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:47:45" (1/1) ... [2019-11-26 02:47:45,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:47:45" (1/1) ... [2019-11-26 02:47:45,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:47:45" (1/1) ... [2019-11-26 02:47:45,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:47:45,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:47:45,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:47:45,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:47:45,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:47:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/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 [2019-11-26 02:47:45,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:47:45,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:47:45,210 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-26 02:47:45,210 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-26 02:47:45,380 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:47:45,381 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:47:45,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:47:45 BoogieIcfgContainer [2019-11-26 02:47:45,382 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:47:45,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:47:45,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:47:45,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:47:45,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:47:44" (1/3) ... [2019-11-26 02:47:45,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e14e2a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:47:45, skipping insertion in model container [2019-11-26 02:47:45,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:47:45" (2/3) ... [2019-11-26 02:47:45,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e14e2a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:47:45, skipping insertion in model container [2019-11-26 02:47:45,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:47:45" (3/3) ... [2019-11-26 02:47:45,389 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i10_o10-2.c [2019-11-26 02:47:45,398 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:47:45,404 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:47:45,416 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:47:45,437 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:47:45,438 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:47:45,438 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:47:45,438 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:47:45,438 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:47:45,439 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:47:45,439 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:47:45,439 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:47:45,454 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2019-11-26 02:47:45,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-26 02:47:45,459 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:47:45,460 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:47:45,460 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:47:45,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:47:45,466 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-26 02:47:45,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:47:45,475 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681084634] [2019-11-26 02:47:45,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:47:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:47:45,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:47:45,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681084634] [2019-11-26 02:47:45,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:47:45,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-26 02:47:45,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813381631] [2019-11-26 02:47:45,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:47:45,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:47:45,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:47:45,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:47:45,764 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 5 states. [2019-11-26 02:47:45,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:47:45,820 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2019-11-26 02:47:45,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:47:45,822 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-26 02:47:45,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:47:45,831 INFO L225 Difference]: With dead ends: 22 [2019-11-26 02:47:45,831 INFO L226 Difference]: Without dead ends: 14 [2019-11-26 02:47:45,834 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:47:45,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-26 02:47:45,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-26 02:47:45,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-26 02:47:45,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-26 02:47:45,868 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-26 02:47:45,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:47:45,869 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-26 02:47:45,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:47:45,869 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-26 02:47:45,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-26 02:47:45,871 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:47:45,871 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:47:45,871 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:47:45,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:47:45,872 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-26 02:47:45,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:47:45,872 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899698932] [2019-11-26 02:47:45,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:47:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:47:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-26 02:47:45,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899698932] [2019-11-26 02:47:45,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810130488] [2019-11-26 02:47:45,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:47:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:47:45,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:47:45,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:47:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-26 02:47:46,015 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:47:46,187 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:47:46,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [999249005] [2019-11-26 02:47:46,245 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-11-26 02:47:46,246 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:47:46,251 FATAL L310 FreeRefinementEngine]: Exception during interpolant generation: IllegalArgumentException [2019-11-26 02:47:46,465 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:47:46,466 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-26 02:47:46,477 INFO L168 Benchmark]: Toolchain (without parser) took 1631.83 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 169.9 MB). Free memory was 949.9 MB in the beginning and 1.1 GB in the end (delta: -136.9 MB). Peak memory consumption was 33.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:47:46,478 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:47:46,480 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 169.9 MB). Free memory was 949.9 MB in the beginning and 1.2 GB in the end (delta: -216.1 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:47:46,482 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.89 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:47:46,483 INFO L168 Benchmark]: Boogie Preprocessor took 15.42 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:47:46,484 INFO L168 Benchmark]: RCFGBuilder took 240.11 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:47:46,486 INFO L168 Benchmark]: TraceAbstraction took 1089.79 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: 59.5 MB). Peak memory consumption was 59.5 MB. Max. memory is 11.5 GB. [2019-11-26 02:47:46,492 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 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 256.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 169.9 MB). Free memory was 949.9 MB in the beginning and 1.2 GB in the end (delta: -216.1 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 25.89 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.42 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 240.11 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1089.79 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: 59.5 MB). Peak memory consumption was 59.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalArgumentException: Recursive programs are not supported. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalArgumentException: Recursive programs are not supported.: de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-26 02:47:48,300 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:47:48,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:47:48,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:47:48,314 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:47:48,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:47:48,317 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:47:48,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:47:48,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:47:48,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:47:48,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:47:48,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:47:48,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:47:48,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:47:48,326 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:47:48,328 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:47:48,328 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:47:48,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:47:48,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:47:48,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:47:48,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:47:48,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:47:48,337 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:47:48,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:47:48,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:47:48,344 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:47:48,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:47:48,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:47:48,346 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:47:48,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:47:48,347 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:47:48,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:47:48,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:47:48,349 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:47:48,351 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:47:48,351 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:47:48,352 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:47:48,352 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:47:48,353 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:47:48,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:47:48,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:47:48,355 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-11-26 02:47:48,370 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:47:48,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:47:48,371 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:47:48,371 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:47:48,372 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:47:48,372 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:47:48,372 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:47:48,372 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:47:48,373 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:47:48,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:47:48,373 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:47:48,374 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:47:48,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:47:48,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:47:48,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:47:48,375 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:47:48,375 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 02:47:48,375 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 02:47:48,375 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 02:47:48,376 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:47:48,376 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:47:48,376 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 02:47:48,376 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:47:48,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:47:48,377 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 02:47:48,377 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:47:48,377 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:47:48,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:47:48,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:47:48,378 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:47:48,378 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:47:48,379 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 02:47:48,379 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 02:47:48,379 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:47:48,379 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:47:48,380 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/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 -> d354f5dc1a4e4616bf2c7c7fc4888805a134a8dd [2019-11-26 02:47:48,648 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:47:48,657 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:47:48,660 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:47:48,662 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:47:48,662 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:47:48,663 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/../../sv-benchmarks/c/recursive-simple/id_i10_o10-2.c [2019-11-26 02:47:48,715 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/data/94bea3e83/796689a7df7a448da6c5f9444d9acbb0/FLAG7bffbb34a [2019-11-26 02:47:49,111 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:47:49,112 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/sv-benchmarks/c/recursive-simple/id_i10_o10-2.c [2019-11-26 02:47:49,118 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/data/94bea3e83/796689a7df7a448da6c5f9444d9acbb0/FLAG7bffbb34a [2019-11-26 02:47:49,541 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/data/94bea3e83/796689a7df7a448da6c5f9444d9acbb0 [2019-11-26 02:47:49,544 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:47:49,545 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:47:49,546 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:47:49,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:47:49,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:47:49,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:47:49" (1/1) ... [2019-11-26 02:47:49,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e336129 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:47:49, skipping insertion in model container [2019-11-26 02:47:49,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:47:49" (1/1) ... [2019-11-26 02:47:49,563 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:47:49,580 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:47:49,767 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:47:49,775 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:47:49,790 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:47:49,805 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:47:49,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:47:49 WrapperNode [2019-11-26 02:47:49,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:47:49,807 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:47:49,807 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:47:49,807 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:47:49,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:47:49" (1/1) ... [2019-11-26 02:47:49,823 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:47:49" (1/1) ... [2019-11-26 02:47:49,840 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:47:49,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:47:49,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:47:49,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:47:49,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:47:49" (1/1) ... [2019-11-26 02:47:49,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:47:49" (1/1) ... [2019-11-26 02:47:49,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:47:49" (1/1) ... [2019-11-26 02:47:49,909 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:47:49" (1/1) ... [2019-11-26 02:47:49,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:47:49" (1/1) ... [2019-11-26 02:47:49,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:47:49" (1/1) ... [2019-11-26 02:47:49,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:47:49" (1/1) ... [2019-11-26 02:47:49,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:47:49,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:47:49,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:47:49,920 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:47:49,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:47:49" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/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 [2019-11-26 02:47:49,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:47:49,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:47:49,984 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-26 02:47:49,985 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-26 02:47:50,158 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:47:50,158 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:47:50,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:47:50 BoogieIcfgContainer [2019-11-26 02:47:50,159 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:47:50,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:47:50,160 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:47:50,163 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:47:50,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:47:49" (1/3) ... [2019-11-26 02:47:50,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f0188d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:47:50, skipping insertion in model container [2019-11-26 02:47:50,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:47:49" (2/3) ... [2019-11-26 02:47:50,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f0188d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:47:50, skipping insertion in model container [2019-11-26 02:47:50,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:47:50" (3/3) ... [2019-11-26 02:47:50,166 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i10_o10-2.c [2019-11-26 02:47:50,175 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:47:50,180 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:47:50,188 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:47:50,205 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:47:50,205 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:47:50,205 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:47:50,206 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:47:50,206 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:47:50,206 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:47:50,206 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:47:50,206 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:47:50,220 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-26 02:47:50,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-26 02:47:50,225 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:47:50,226 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:47:50,226 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:47:50,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:47:50,232 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-26 02:47:50,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:47:50,241 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [55082814] [2019-11-26 02:47:50,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:47:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:47:50,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 02:47:50,320 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:47:50,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:47:50,401 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:47:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:47:50,506 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [55082814] [2019-11-26 02:47:50,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:47:50,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-11-26 02:47:50,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061014775] [2019-11-26 02:47:50,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:47:50,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:47:50,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:47:50,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:47:50,522 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 7 states. [2019-11-26 02:47:50,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:47:50,620 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-26 02:47:50,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:47:50,622 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-26 02:47:50,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:47:50,629 INFO L225 Difference]: With dead ends: 24 [2019-11-26 02:47:50,629 INFO L226 Difference]: Without dead ends: 14 [2019-11-26 02:47:50,632 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-26 02:47:50,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-26 02:47:50,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-26 02:47:50,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-26 02:47:50,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-26 02:47:50,666 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-26 02:47:50,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:47:50,666 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-26 02:47:50,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:47:50,667 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-26 02:47:50,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-26 02:47:50,668 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:47:50,668 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:47:50,870 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:47:50,870 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:47:50,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:47:50,870 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-26 02:47:50,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:47:50,871 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [949849719] [2019-11-26 02:47:50,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:47:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:47:50,915 INFO L255 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:47:50,917 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:47:50,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-26 02:47:50,974 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:47:51,253 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:51,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:47:51,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [949849719] [2019-11-26 02:47:51,291 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245581091] [2019-11-26 02:47:51,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:47:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:47:51,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:47:51,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:47:51,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-26 02:47:51,337 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:47:51,443 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:47:51,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:47:51,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7] total 9 [2019-11-26 02:47:51,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830038017] [2019-11-26 02:47:51,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-26 02:47:51,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:47:51,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-26 02:47:51,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-26 02:47:51,470 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 9 states. [2019-11-26 02:47:51,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:47:51,557 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-26 02:47:51,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:47:51,558 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2019-11-26 02:47:51,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:47:51,559 INFO L225 Difference]: With dead ends: 21 [2019-11-26 02:47:51,559 INFO L226 Difference]: Without dead ends: 17 [2019-11-26 02:47:51,560 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-26 02:47:51,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-26 02:47:51,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-26 02:47:51,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-26 02:47:51,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-26 02:47:51,565 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-26 02:47:51,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:47:51,566 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-26 02:47:51,566 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-26 02:47:51,566 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-26 02:47:51,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-26 02:47:51,568 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:47:51,568 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:47:51,969 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:47:51,969 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:47:51,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:47:51,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-26 02:47:51,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:47:51,970 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [118107642] [2019-11-26 02:47:51,971 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:47:52,011 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 02:47:52,011 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:47:52,012 INFO L255 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-26 02:47:52,014 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:47:52,066 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-26 02:47:52,066 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:47:52,298 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:52,353 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:52,381 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:47:52,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [118107642] [2019-11-26 02:47:52,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610643544] [2019-11-26 02:47:52,382 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:47:52,425 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 02:47:52,425 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:47:52,426 INFO L255 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-26 02:47:52,428 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:47:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-26 02:47:52,439 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:47:52,645 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:52,685 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:47:52,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:47:52,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7, 9] total 11 [2019-11-26 02:47:52,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072637673] [2019-11-26 02:47:52,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-26 02:47:52,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:47:52,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-26 02:47:52,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-11-26 02:47:52,693 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 11 states. [2019-11-26 02:47:52,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:47:52,797 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-26 02:47:52,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:47:52,798 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2019-11-26 02:47:52,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:47:52,799 INFO L225 Difference]: With dead ends: 24 [2019-11-26 02:47:52,799 INFO L226 Difference]: Without dead ends: 20 [2019-11-26 02:47:52,799 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-26 02:47:52,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-26 02:47:52,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-26 02:47:52,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-26 02:47:52,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-26 02:47:52,806 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-11-26 02:47:52,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:47:52,807 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-26 02:47:52,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-26 02:47:52,807 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-26 02:47:52,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-26 02:47:52,809 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:47:52,809 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:47:53,211 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:47:53,219 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:47:53,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:47:53,219 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-11-26 02:47:53,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:47:53,220 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1979963931] [2019-11-26 02:47:53,220 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/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 [2019-11-26 02:47:53,289 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-26 02:47:53,289 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:47:53,291 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-26 02:47:53,293 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:47:53,358 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-26 02:47:53,358 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:47:53,689 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:53,761 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:53,813 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-26 02:47:53,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1979963931] [2019-11-26 02:47:53,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752367407] [2019-11-26 02:47:53,832 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/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 [2019-11-26 02:47:53,870 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-26 02:47:53,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:47:53,872 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-26 02:47:53,873 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:47:53,879 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-26 02:47:53,879 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:47:54,134 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:54,195 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:54,218 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:54,223 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-26 02:47:54,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:47:54,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8, 11] total 13 [2019-11-26 02:47:54,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474376966] [2019-11-26 02:47:54,240 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-26 02:47:54,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:47:54,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-26 02:47:54,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-11-26 02:47:54,242 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 13 states. [2019-11-26 02:47:54,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:47:54,339 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-26 02:47:54,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:47:54,339 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2019-11-26 02:47:54,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:47:54,340 INFO L225 Difference]: With dead ends: 27 [2019-11-26 02:47:54,340 INFO L226 Difference]: Without dead ends: 23 [2019-11-26 02:47:54,341 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2019-11-26 02:47:54,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-26 02:47:54,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-26 02:47:54,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-26 02:47:54,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-26 02:47:54,346 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-11-26 02:47:54,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:47:54,346 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-26 02:47:54,346 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-26 02:47:54,347 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-26 02:47:54,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-26 02:47:54,348 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:47:54,348 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:47:54,752 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:47:54,753 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:47:54,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:47:54,753 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-11-26 02:47:54,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:47:54,754 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [41970312] [2019-11-26 02:47:54,754 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:47:54,788 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-26 02:47:54,788 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:47:54,789 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-26 02:47:54,791 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:47:54,878 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-26 02:47:54,879 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:47:55,212 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:55,321 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:55,397 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:55,452 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-26 02:47:55,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [41970312] [2019-11-26 02:47:55,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877450413] [2019-11-26 02:47:55,472 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:47:55,516 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-26 02:47:55,516 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:47:55,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-26 02:47:55,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:47:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-26 02:47:55,526 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:47:55,775 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:55,875 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:55,933 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:55,983 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:55,987 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-26 02:47:55,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:47:55,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 9, 13] total 15 [2019-11-26 02:47:55,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146174539] [2019-11-26 02:47:55,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-26 02:47:55,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:47:55,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-26 02:47:55,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-11-26 02:47:55,989 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 15 states. [2019-11-26 02:47:56,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:47:56,116 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-11-26 02:47:56,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-26 02:47:56,117 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2019-11-26 02:47:56,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:47:56,118 INFO L225 Difference]: With dead ends: 30 [2019-11-26 02:47:56,118 INFO L226 Difference]: Without dead ends: 26 [2019-11-26 02:47:56,119 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2019-11-26 02:47:56,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-26 02:47:56,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-26 02:47:56,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-26 02:47:56,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-26 02:47:56,124 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-11-26 02:47:56,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:47:56,124 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-26 02:47:56,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-26 02:47:56,125 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-26 02:47:56,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-26 02:47:56,126 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:47:56,126 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:47:56,527 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:47:56,527 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:47:56,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:47:56,528 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-11-26 02:47:56,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:47:56,528 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1723999231] [2019-11-26 02:47:56,528 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:47:56,593 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-26 02:47:56,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:47:56,594 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-26 02:47:56,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:47:56,673 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-26 02:47:56,674 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:47:56,987 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:57,117 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:57,200 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:57,269 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:57,306 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-26 02:47:57,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1723999231] [2019-11-26 02:47:57,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864320444] [2019-11-26 02:47:57,337 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:47:57,402 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-26 02:47:57,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:47:57,404 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-26 02:47:57,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:47:57,415 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-26 02:47:57,416 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:47:57,836 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:57,955 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:58,027 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:58,097 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:58,118 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:58,122 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-26 02:47:58,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:47:58,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 10, 15] total 17 [2019-11-26 02:47:58,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516801777] [2019-11-26 02:47:58,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-26 02:47:58,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:47:58,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-26 02:47:58,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2019-11-26 02:47:58,124 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 17 states. [2019-11-26 02:47:58,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:47:58,318 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-11-26 02:47:58,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-26 02:47:58,323 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2019-11-26 02:47:58,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:47:58,324 INFO L225 Difference]: With dead ends: 33 [2019-11-26 02:47:58,324 INFO L226 Difference]: Without dead ends: 29 [2019-11-26 02:47:58,325 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2019-11-26 02:47:58,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-26 02:47:58,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-26 02:47:58,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-26 02:47:58,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-26 02:47:58,334 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-11-26 02:47:58,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:47:58,336 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-26 02:47:58,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-26 02:47:58,336 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-26 02:47:58,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-26 02:47:58,338 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:47:58,338 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:47:58,739 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:47:58,739 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:47:58,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:47:58,739 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-11-26 02:47:58,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:47:58,740 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [357966623] [2019-11-26 02:47:58,740 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/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 [2019-11-26 02:47:58,816 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-26 02:47:58,817 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:47:58,818 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-26 02:47:58,819 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:47:58,910 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-26 02:47:58,910 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:47:59,268 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:59,434 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:59,545 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:59,627 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:59,691 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:59,729 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:47:59,754 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-26 02:47:59,754 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [357966623] [2019-11-26 02:47:59,754 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931082503] [2019-11-26 02:47:59,754 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/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 [2019-11-26 02:47:59,812 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-26 02:47:59,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:47:59,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-26 02:47:59,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:47:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-26 02:47:59,823 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:48:00,165 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:00,275 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:00,400 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:00,486 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:00,538 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:00,563 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:00,568 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-26 02:48:00,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:48:00,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 11, 17] total 19 [2019-11-26 02:48:00,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578853849] [2019-11-26 02:48:00,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-26 02:48:00,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:48:00,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-26 02:48:00,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2019-11-26 02:48:00,575 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 19 states. [2019-11-26 02:48:00,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:48:00,837 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-11-26 02:48:00,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-26 02:48:00,838 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2019-11-26 02:48:00,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:48:00,839 INFO L225 Difference]: With dead ends: 36 [2019-11-26 02:48:00,839 INFO L226 Difference]: Without dead ends: 32 [2019-11-26 02:48:00,840 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2019-11-26 02:48:00,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-26 02:48:00,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-26 02:48:00,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-26 02:48:00,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-26 02:48:00,845 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-11-26 02:48:00,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:48:00,847 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-26 02:48:00,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-26 02:48:00,847 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-26 02:48:00,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-26 02:48:00,856 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:48:00,856 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:48:01,257 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 [2019-11-26 02:48:01,257 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:48:01,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:48:01,258 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-11-26 02:48:01,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:48:01,258 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [164903279] [2019-11-26 02:48:01,259 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:48:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:48:01,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-26 02:48:01,319 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:48:01,423 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-26 02:48:01,423 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:48:01,845 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:02,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:02,157 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:02,264 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:02,396 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:02,463 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:02,502 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:02,537 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-26 02:48:02,538 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [164903279] [2019-11-26 02:48:02,538 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382660288] [2019-11-26 02:48:02,538 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:48:02,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:48:02,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-26 02:48:02,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:48:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-26 02:48:02,597 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:48:02,950 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:03,090 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:03,239 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:03,334 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:03,401 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:03,450 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:03,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-26 02:48:03,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:48:03,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19, 12, 19] total 21 [2019-11-26 02:48:03,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729584326] [2019-11-26 02:48:03,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-26 02:48:03,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:48:03,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-26 02:48:03,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2019-11-26 02:48:03,495 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 21 states. [2019-11-26 02:48:03,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:48:03,701 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-11-26 02:48:03,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-26 02:48:03,701 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2019-11-26 02:48:03,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:48:03,702 INFO L225 Difference]: With dead ends: 39 [2019-11-26 02:48:03,702 INFO L226 Difference]: Without dead ends: 35 [2019-11-26 02:48:03,703 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 179 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2019-11-26 02:48:03,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-26 02:48:03,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-26 02:48:03,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-26 02:48:03,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-26 02:48:03,707 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-11-26 02:48:03,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:48:03,708 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-26 02:48:03,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-26 02:48:03,708 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-26 02:48:03,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-26 02:48:03,708 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:48:03,709 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:48:04,112 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:48:04,113 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:48:04,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:48:04,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-11-26 02:48:04,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:48:04,113 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1440399482] [2019-11-26 02:48:04,113 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:48:04,190 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 02:48:04,190 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:48:04,192 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-26 02:48:04,193 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:48:04,287 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-26 02:48:04,287 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:48:04,721 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:04,918 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:05,122 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:05,249 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:05,356 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:05,441 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:05,506 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:05,546 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-26 02:48:05,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1440399482] [2019-11-26 02:48:05,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111489434] [2019-11-26 02:48:05,575 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:48:05,633 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 02:48:05,633 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:48:05,635 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-26 02:48:05,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:48:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-26 02:48:05,643 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:48:06,041 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:06,247 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:06,390 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:06,499 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:06,595 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:06,682 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:06,747 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:06,766 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:06,775 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-26 02:48:06,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:48:06,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 13, 21] total 23 [2019-11-26 02:48:06,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164227932] [2019-11-26 02:48:06,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-26 02:48:06,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:48:06,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-26 02:48:06,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2019-11-26 02:48:06,777 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 23 states. [2019-11-26 02:48:07,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:48:07,046 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-11-26 02:48:07,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-26 02:48:07,046 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2019-11-26 02:48:07,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:48:07,048 INFO L225 Difference]: With dead ends: 42 [2019-11-26 02:48:07,048 INFO L226 Difference]: Without dead ends: 38 [2019-11-26 02:48:07,049 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2019-11-26 02:48:07,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-26 02:48:07,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-26 02:48:07,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-26 02:48:07,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-26 02:48:07,053 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-11-26 02:48:07,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:48:07,054 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-26 02:48:07,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-26 02:48:07,054 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-26 02:48:07,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-26 02:48:07,055 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:48:07,055 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:48:07,464 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:48:07,464 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:48:07,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:48:07,465 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-11-26 02:48:07,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:48:07,465 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [840951509] [2019-11-26 02:48:07,465 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/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 [2019-11-26 02:48:07,581 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-26 02:48:07,581 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:48:07,582 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-26 02:48:07,583 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:48:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-26 02:48:07,698 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:48:08,165 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:08,382 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:08,560 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:08,712 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:08,839 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:08,964 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:09,063 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:09,130 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:09,171 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-26 02:48:09,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [840951509] [2019-11-26 02:48:09,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809250964] [2019-11-26 02:48:09,217 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/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 [2019-11-26 02:48:09,299 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-26 02:48:09,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:48:09,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-26 02:48:09,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:48:09,310 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-26 02:48:09,311 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:48:09,811 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:09,989 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:10,142 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:10,274 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:10,385 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:10,483 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:10,547 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:10,589 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:10,618 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:10,628 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-26 02:48:10,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:48:10,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23, 14, 23] total 25 [2019-11-26 02:48:10,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412763201] [2019-11-26 02:48:10,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-26 02:48:10,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:48:10,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-26 02:48:10,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2019-11-26 02:48:10,631 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 25 states. [2019-11-26 02:48:10,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:48:10,909 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-11-26 02:48:10,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-26 02:48:10,910 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 63 [2019-11-26 02:48:10,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:48:10,911 INFO L225 Difference]: With dead ends: 45 [2019-11-26 02:48:10,911 INFO L226 Difference]: Without dead ends: 41 [2019-11-26 02:48:10,912 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 219 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=982, Unknown=0, NotChecked=0, Total=1190 [2019-11-26 02:48:10,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-26 02:48:10,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-26 02:48:10,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-26 02:48:10,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-11-26 02:48:10,917 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-11-26 02:48:10,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:48:10,918 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-11-26 02:48:10,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-26 02:48:10,918 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-11-26 02:48:10,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-26 02:48:10,919 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:48:10,919 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:48:11,319 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:48:11,320 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:48:11,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:48:11,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-11-26 02:48:11,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:48:11,320 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [268755433] [2019-11-26 02:48:11,320 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/cvc4 Starting monitored process 21 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:48:11,421 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-26 02:48:11,421 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:48:11,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-26 02:48:11,425 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:48:11,885 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-26 02:48:11,886 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:48:13,143 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-26 02:48:13,143 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [268755433] [2019-11-26 02:48:13,143 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046515565] [2019-11-26 02:48:13,143 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:48:13,246 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-26 02:48:13,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:48:13,250 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-26 02:48:13,251 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:48:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-26 02:48:13,285 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:48:14,404 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-26 02:48:14,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:48:14,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 25] total 25 [2019-11-26 02:48:14,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6335554] [2019-11-26 02:48:14,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-26 02:48:14,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:48:14,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-26 02:48:14,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2019-11-26 02:48:14,406 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 25 states. [2019-11-26 02:48:14,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:48:14,626 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2019-11-26 02:48:14,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-26 02:48:14,626 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 69 [2019-11-26 02:48:14,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:48:14,627 INFO L225 Difference]: With dead ends: 48 [2019-11-26 02:48:14,627 INFO L226 Difference]: Without dead ends: 44 [2019-11-26 02:48:14,628 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 244 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2019-11-26 02:48:14,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-26 02:48:14,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-26 02:48:14,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-26 02:48:14,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-11-26 02:48:14,633 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2019-11-26 02:48:14,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:48:14,634 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-11-26 02:48:14,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-26 02:48:14,634 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-11-26 02:48:14,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-26 02:48:14,635 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:48:14,635 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:48:15,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:48:15,042 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:48:15,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:48:15,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2019-11-26 02:48:15,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:48:15,043 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1239262026] [2019-11-26 02:48:15,043 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/cvc4 Starting monitored process 23 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:48:15,204 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-26 02:48:15,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:48:15,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-26 02:48:15,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:48:15,317 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 22 proven. 186 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2019-11-26 02:48:15,317 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:48:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 22 proven. 286 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-26 02:48:17,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1239262026] [2019-11-26 02:48:17,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267730529] [2019-11-26 02:48:17,434 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:48:17,541 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-26 02:48:17,541 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:48:17,543 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-26 02:48:17,544 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:48:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-26 02:48:17,787 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:48:18,396 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:18,651 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:18,991 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:19,238 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:19,422 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:19,587 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:19,729 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:19,846 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:19,947 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:20,026 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:20,081 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:48:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-26 02:48:20,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:48:20,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25, 16, 27] total 51 [2019-11-26 02:48:20,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851107290] [2019-11-26 02:48:20,152 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-26 02:48:20,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:48:20,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-26 02:48:20,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=2162, Unknown=0, NotChecked=0, Total=2550 [2019-11-26 02:48:20,153 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 51 states. [2019-11-26 02:48:20,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:48:20,612 INFO L93 Difference]: Finished difference Result 108 states and 229 transitions. [2019-11-26 02:48:20,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-26 02:48:20,614 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 75 [2019-11-26 02:48:20,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:48:20,614 INFO L225 Difference]: With dead ends: 108 [2019-11-26 02:48:20,614 INFO L226 Difference]: Without dead ends: 0 [2019-11-26 02:48:20,618 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 251 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=795, Invalid=2987, Unknown=0, NotChecked=0, Total=3782 [2019-11-26 02:48:20,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-26 02:48:20,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-26 02:48:20,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-26 02:48:20,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-26 02:48:20,619 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2019-11-26 02:48:20,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:48:20,619 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-26 02:48:20,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-26 02:48:20,619 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-26 02:48:20,619 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-26 02:48:21,027 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:48:21,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-26 02:48:21,286 WARN L192 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2019-11-26 02:48:21,289 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-26 02:48:21,289 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-26 02:48:21,289 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-26 02:48:21,289 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2019-11-26 02:48:21,289 INFO L444 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2019-11-26 02:48:21,289 INFO L444 ceAbstractionStarter]: For program point L12(lines 12 14) no Hoare annotation was computed. [2019-11-26 02:48:21,289 INFO L440 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (= (bvadd ULTIMATE.start_main_~input~0 (_ bv4294967286 32)) (_ bv0 32)) [2019-11-26 02:48:21,289 INFO L444 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2019-11-26 02:48:21,290 INFO L444 ceAbstractionStarter]: For program point L9(lines 9 15) no Hoare annotation was computed. [2019-11-26 02:48:21,290 INFO L444 ceAbstractionStarter]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2019-11-26 02:48:21,290 INFO L444 ceAbstractionStarter]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2019-11-26 02:48:21,290 INFO L447 ceAbstractionStarter]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2019-11-26 02:48:21,290 INFO L440 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: (let ((.cse0 (= id_~x |id_#in~x|))) (and (or .cse0 (not (= (_ bv3 32) |id_#in~x|))) (or (not (= (_ bv5 32) |id_#in~x|)) .cse0) (or .cse0 (not (= (bvadd |id_#in~x| (_ bv4294967286 32)) (_ bv0 32)))) (or .cse0 (not (= (bvadd |id_#in~x| (_ bv4294967289 32)) (_ bv0 32)))) (or .cse0 (not (= (_ bv2 32) |id_#in~x|))) (not (= (_ bv0 32) |id_#in~x|)) (or .cse0 (not (= (_ bv1 32) |id_#in~x|))) (or .cse0 (not (= (_ bv4 32) |id_#in~x|))) (or .cse0 (not (= (_ bv9 32) |id_#in~x|))) (or (not (= (bvadd |id_#in~x| (_ bv4294967288 32)) (_ bv0 32))) .cse0) (or .cse0 (not (= (_ bv6 32) |id_#in~x|))))) [2019-11-26 02:48:21,290 INFO L444 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-26 02:48:21,290 INFO L444 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2019-11-26 02:48:21,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:48:21 BoogieIcfgContainer [2019-11-26 02:48:21,293 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:48:21,293 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:48:21,293 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:48:21,293 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:48:21,294 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:47:50" (3/4) ... [2019-11-26 02:48:21,296 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-26 02:48:21,303 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2019-11-26 02:48:21,306 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-26 02:48:21,307 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-26 02:48:21,345 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_02d585dc-ab80-4f71-a76d-fa093fd8ea2c/bin/utaipan/witness.graphml [2019-11-26 02:48:21,345 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:48:21,346 INFO L168 Benchmark]: Toolchain (without parser) took 31801.26 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 427.8 MB). Free memory was 952.4 MB in the beginning and 1.1 GB in the end (delta: -196.7 MB). Peak memory consumption was 231.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:48:21,347 INFO L168 Benchmark]: CDTParser took 0.23 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. [2019-11-26 02:48:21,347 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.97 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. [2019-11-26 02:48:21,347 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.17 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. [2019-11-26 02:48:21,349 INFO L168 Benchmark]: Boogie Preprocessor took 79.75 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 941.6 MB in the beginning and 1.2 GB in the end (delta: -208.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2019-11-26 02:48:21,349 INFO L168 Benchmark]: RCFGBuilder took 239.44 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 23.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:48:21,350 INFO L168 Benchmark]: TraceAbstraction took 31132.33 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 274.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -22.5 MB). Peak memory consumption was 251.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:48:21,350 INFO L168 Benchmark]: Witness Printer took 52.15 ms. Allocated memory is still 1.5 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:48:21,353 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 259.97 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 33.17 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 79.75 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 941.6 MB in the beginning and 1.2 GB in the end (delta: -208.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 239.44 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 23.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 31132.33 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 274.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -22.5 MB). Peak memory consumption was 251.7 MB. Max. memory is 11.5 GB. * Witness Printer took 52.15 ms. Allocated memory is still 1.5 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: SAFE, OverallTime: 31.0s, OverallIterations: 12, TraceHistogramMax: 12, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, HoareTripleCheckerStatistics: 238 SDtfs, 859 SDslu, 1918 SDs, 0 SdLazy, 1815 SolverSat, 392 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2028 GetRequests, 1729 SyntacticMatches, 21 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 4.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 25 PreInvPairs, 25 NumberOfFragments, 97 HoareAnnotationTreeSize, 25 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 46 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 21.8s InterpolantComputationTime, 999 NumberOfCodeBlocks, 999 NumberOfCodeBlocksAsserted, 95 NumberOfCheckSat, 1952 ConstructedInterpolants, 0 QuantifiedInterpolants, 370586 SizeOfPredicates, 153 NumberOfNonLiveVariables, 1378 ConjunctsInSsa, 355 ConjunctsInUnsatCore, 46 InterpolantComputations, 2 PerfectInterpolantSequences, 2379/6336 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...