./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s3if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s3if.c -s /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 43265b9011f518c5ca7acf1a863628988ab06054 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s3if.c -s /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 43265b9011f518c5ca7acf1a863628988ab06054 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 13:35:18,807 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 13:35:18,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 13:35:18,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 13:35:18,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 13:35:18,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 13:35:18,818 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 13:35:18,819 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 13:35:18,820 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 13:35:18,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 13:35:18,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 13:35:18,822 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 13:35:18,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 13:35:18,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 13:35:18,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 13:35:18,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 13:35:18,825 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 13:35:18,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 13:35:18,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 13:35:18,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 13:35:18,830 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 13:35:18,831 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 13:35:18,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 13:35:18,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 13:35:18,834 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 13:35:18,834 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 13:35:18,834 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 13:35:18,834 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 13:35:18,835 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 13:35:18,835 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 13:35:18,835 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 13:35:18,836 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 13:35:18,836 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 13:35:18,837 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 13:35:18,837 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 13:35:18,837 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 13:35:18,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 13:35:18,838 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 13:35:18,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 13:35:18,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 13:35:18,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 13:35:18,840 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 13:35:18,849 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 13:35:18,850 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 13:35:18,850 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 13:35:18,850 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 13:35:18,851 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 13:35:18,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 13:35:18,851 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 13:35:18,851 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 13:35:18,851 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 13:35:18,851 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 13:35:18,851 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 13:35:18,852 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 13:35:18,852 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 13:35:18,852 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 13:35:18,852 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 13:35:18,852 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 13:35:18,852 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 13:35:18,852 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 13:35:18,853 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 13:35:18,853 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 13:35:18,853 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 13:35:18,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 13:35:18,853 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 13:35:18,853 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 13:35:18,853 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 13:35:18,853 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 13:35:18,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 13:35:18,854 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 13:35:18,854 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 13:35:18,854 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43265b9011f518c5ca7acf1a863628988ab06054 [2019-12-07 13:35:18,952 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 13:35:18,961 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 13:35:18,964 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 13:35:18,965 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 13:35:18,966 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 13:35:18,966 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/../../sv-benchmarks/c/array-fpi/s3if.c [2019-12-07 13:35:19,004 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/data/4eb039f8b/480c53f841334aa087045d9f73e9f795/FLAGb53be05a1 [2019-12-07 13:35:19,319 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 13:35:19,320 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/sv-benchmarks/c/array-fpi/s3if.c [2019-12-07 13:35:19,323 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/data/4eb039f8b/480c53f841334aa087045d9f73e9f795/FLAGb53be05a1 [2019-12-07 13:35:19,332 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/data/4eb039f8b/480c53f841334aa087045d9f73e9f795 [2019-12-07 13:35:19,333 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 13:35:19,334 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 13:35:19,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 13:35:19,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 13:35:19,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 13:35:19,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:35:19" (1/1) ... [2019-12-07 13:35:19,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ea804c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:35:19, skipping insertion in model container [2019-12-07 13:35:19,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:35:19" (1/1) ... [2019-12-07 13:35:19,344 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 13:35:19,355 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 13:35:19,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:35:19,502 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 13:35:19,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:35:19,528 INFO L208 MainTranslator]: Completed translation [2019-12-07 13:35:19,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:35:19 WrapperNode [2019-12-07 13:35:19,529 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 13:35:19,529 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 13:35:19,529 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 13:35:19,530 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 13:35:19,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:35:19" (1/1) ... [2019-12-07 13:35:19,541 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:35:19" (1/1) ... [2019-12-07 13:35:19,556 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 13:35:19,556 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 13:35:19,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 13:35:19,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 13:35:19,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:35:19" (1/1) ... [2019-12-07 13:35:19,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:35:19" (1/1) ... [2019-12-07 13:35:19,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:35:19" (1/1) ... [2019-12-07 13:35:19,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:35:19" (1/1) ... [2019-12-07 13:35:19,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:35:19" (1/1) ... [2019-12-07 13:35:19,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:35:19" (1/1) ... [2019-12-07 13:35:19,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:35:19" (1/1) ... [2019-12-07 13:35:19,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 13:35:19,577 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 13:35:19,577 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 13:35:19,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 13:35:19,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:35:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 13:35:19,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 13:35:19,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 13:35:19,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 13:35:19,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 13:35:19,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 13:35:19,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 13:35:19,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 13:35:19,755 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 13:35:19,756 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-12-07 13:35:19,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:35:19 BoogieIcfgContainer [2019-12-07 13:35:19,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 13:35:19,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 13:35:19,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 13:35:19,759 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 13:35:19,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:35:19" (1/3) ... [2019-12-07 13:35:19,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c863125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:35:19, skipping insertion in model container [2019-12-07 13:35:19,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:35:19" (2/3) ... [2019-12-07 13:35:19,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c863125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:35:19, skipping insertion in model container [2019-12-07 13:35:19,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:35:19" (3/3) ... [2019-12-07 13:35:19,762 INFO L109 eAbstractionObserver]: Analyzing ICFG s3if.c [2019-12-07 13:35:19,768 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 13:35:19,773 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 13:35:19,780 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 13:35:19,794 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 13:35:19,795 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 13:35:19,795 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 13:35:19,795 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 13:35:19,795 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 13:35:19,795 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 13:35:19,795 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 13:35:19,795 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 13:35:19,804 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-12-07 13:35:19,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 13:35:19,809 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:35:19,809 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:35:19,809 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:35:19,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:35:19,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1476218026, now seen corresponding path program 1 times [2019-12-07 13:35:19,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:35:19,819 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109396132] [2019-12-07 13:35:19,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:35:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:35:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:19,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109396132] [2019-12-07 13:35:19,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:35:19,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 13:35:19,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344780630] [2019-12-07 13:35:19,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 13:35:19,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:35:19,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 13:35:19,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 13:35:19,925 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-12-07 13:35:19,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:35:19,935 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2019-12-07 13:35:19,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 13:35:19,936 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-12-07 13:35:19,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:35:19,942 INFO L225 Difference]: With dead ends: 29 [2019-12-07 13:35:19,942 INFO L226 Difference]: Without dead ends: 13 [2019-12-07 13:35:19,944 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 13:35:19,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-12-07 13:35:19,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-12-07 13:35:19,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-12-07 13:35:19,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-12-07 13:35:19,964 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2019-12-07 13:35:19,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:35:19,965 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-12-07 13:35:19,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 13:35:19,965 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-12-07 13:35:19,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 13:35:19,965 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:35:19,965 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:35:19,965 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:35:19,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:35:19,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1304115419, now seen corresponding path program 1 times [2019-12-07 13:35:19,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:35:19,966 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823834068] [2019-12-07 13:35:19,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:35:19,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:35:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:20,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823834068] [2019-12-07 13:35:20,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:35:20,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 13:35:20,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545335917] [2019-12-07 13:35:20,010 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 13:35:20,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:35:20,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 13:35:20,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 13:35:20,011 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2019-12-07 13:35:20,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:35:20,035 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-12-07 13:35:20,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 13:35:20,035 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-12-07 13:35:20,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:35:20,036 INFO L225 Difference]: With dead ends: 23 [2019-12-07 13:35:20,036 INFO L226 Difference]: Without dead ends: 15 [2019-12-07 13:35:20,036 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 13:35:20,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-12-07 13:35:20,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-12-07 13:35:20,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 13:35:20,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-12-07 13:35:20,039 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2019-12-07 13:35:20,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:35:20,039 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-12-07 13:35:20,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 13:35:20,039 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-12-07 13:35:20,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 13:35:20,040 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:35:20,040 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:35:20,040 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:35:20,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:35:20,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1358761923, now seen corresponding path program 1 times [2019-12-07 13:35:20,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:35:20,040 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422037510] [2019-12-07 13:35:20,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:35:20,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:35:20,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 13:35:20,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422037510] [2019-12-07 13:35:20,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:35:20,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 13:35:20,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608222376] [2019-12-07 13:35:20,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 13:35:20,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:35:20,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 13:35:20,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:35:20,082 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2019-12-07 13:35:20,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:35:20,116 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2019-12-07 13:35:20,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 13:35:20,117 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-12-07 13:35:20,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:35:20,118 INFO L225 Difference]: With dead ends: 22 [2019-12-07 13:35:20,118 INFO L226 Difference]: Without dead ends: 18 [2019-12-07 13:35:20,118 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:35:20,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-12-07 13:35:20,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2019-12-07 13:35:20,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-12-07 13:35:20,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-12-07 13:35:20,122 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2019-12-07 13:35:20,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:35:20,122 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-12-07 13:35:20,122 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 13:35:20,122 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-12-07 13:35:20,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 13:35:20,123 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:35:20,123 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:35:20,123 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:35:20,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:35:20,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1565637502, now seen corresponding path program 1 times [2019-12-07 13:35:20,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:35:20,124 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714088406] [2019-12-07 13:35:20,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:35:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:35:20,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:20,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714088406] [2019-12-07 13:35:20,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566942650] [2019-12-07 13:35:20,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:20,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:35:20,324 INFO L264 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-07 13:35:20,327 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:35:20,363 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-12-07 13:35:20,363 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:20,373 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:20,379 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-12-07 13:35:20,379 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:20,387 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:20,387 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:35:20,387 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2019-12-07 13:35:20,411 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-12-07 13:35:20,411 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:20,423 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:20,423 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:35:20,423 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2019-12-07 13:35:20,549 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:20,549 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2019-12-07 13:35:20,550 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:20,572 INFO L614 ElimStorePlain]: treesize reduction 24, result has 68.8 percent of original size [2019-12-07 13:35:20,573 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:20,573 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:70, output treesize:53 [2019-12-07 13:35:20,608 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:35:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:20,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:35:20,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2019-12-07 13:35:20,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806391409] [2019-12-07 13:35:20,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-07 13:35:20,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:35:20,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-07 13:35:20,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2019-12-07 13:35:20,633 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 15 states. [2019-12-07 13:35:20,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:35:20,932 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-12-07 13:35:20,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 13:35:20,932 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2019-12-07 13:35:20,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:35:20,934 INFO L225 Difference]: With dead ends: 33 [2019-12-07 13:35:20,934 INFO L226 Difference]: Without dead ends: 24 [2019-12-07 13:35:20,935 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2019-12-07 13:35:20,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-12-07 13:35:20,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-12-07 13:35:20,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-12-07 13:35:20,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-12-07 13:35:20,939 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2019-12-07 13:35:20,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:35:20,939 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-12-07 13:35:20,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-07 13:35:20,940 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-12-07 13:35:20,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 13:35:20,940 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:35:20,940 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:35:21,141 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:21,141 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:35:21,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:35:21,142 INFO L82 PathProgramCache]: Analyzing trace with hash -472130976, now seen corresponding path program 2 times [2019-12-07 13:35:21,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:35:21,142 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222039905] [2019-12-07 13:35:21,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:35:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:35:21,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:21,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222039905] [2019-12-07 13:35:21,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194114380] [2019-12-07 13:35:21,209 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:21,237 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:35:21,238 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:35:21,238 INFO L264 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 13:35:21,239 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:35:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:21,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:35:21,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-12-07 13:35:21,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344542240] [2019-12-07 13:35:21,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 13:35:21,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:35:21,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 13:35:21,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-07 13:35:21,267 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 10 states. [2019-12-07 13:35:21,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:35:21,362 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-12-07 13:35:21,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 13:35:21,363 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-12-07 13:35:21,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:35:21,363 INFO L225 Difference]: With dead ends: 31 [2019-12-07 13:35:21,363 INFO L226 Difference]: Without dead ends: 27 [2019-12-07 13:35:21,364 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-07 13:35:21,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-12-07 13:35:21,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2019-12-07 13:35:21,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-07 13:35:21,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-12-07 13:35:21,367 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2019-12-07 13:35:21,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:35:21,368 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-12-07 13:35:21,368 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 13:35:21,368 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-12-07 13:35:21,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-07 13:35:21,368 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:35:21,368 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:35:21,569 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:21,569 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:35:21,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:35:21,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1317941731, now seen corresponding path program 3 times [2019-12-07 13:35:21,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:35:21,571 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198077964] [2019-12-07 13:35:21,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:35:21,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:35:21,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:21,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198077964] [2019-12-07 13:35:21,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596664449] [2019-12-07 13:35:21,634 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:21,663 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 13:35:21,664 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:35:21,664 INFO L264 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 13:35:21,665 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:35:21,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:21,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:35:21,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-12-07 13:35:21,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731268493] [2019-12-07 13:35:21,693 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 13:35:21,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:35:21,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 13:35:21,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-12-07 13:35:21,693 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 10 states. [2019-12-07 13:35:21,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:35:21,747 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-12-07 13:35:21,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 13:35:21,747 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-12-07 13:35:21,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:35:21,748 INFO L225 Difference]: With dead ends: 35 [2019-12-07 13:35:21,748 INFO L226 Difference]: Without dead ends: 23 [2019-12-07 13:35:21,749 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-12-07 13:35:21,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-12-07 13:35:21,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2019-12-07 13:35:21,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 13:35:21,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-12-07 13:35:21,752 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 17 [2019-12-07 13:35:21,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:35:21,752 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-12-07 13:35:21,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 13:35:21,752 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-12-07 13:35:21,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-07 13:35:21,753 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:35:21,753 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:35:21,953 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:21,954 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:35:21,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:35:21,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1991965825, now seen corresponding path program 4 times [2019-12-07 13:35:21,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:35:21,955 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111188093] [2019-12-07 13:35:21,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:35:21,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:35:22,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:22,284 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111188093] [2019-12-07 13:35:22,284 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784524493] [2019-12-07 13:35:22,284 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:22,308 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:35:22,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:35:22,309 INFO L264 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2019-12-07 13:35:22,310 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:35:22,316 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-12-07 13:35:22,316 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:22,321 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:22,323 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-12-07 13:35:22,323 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:22,328 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:22,328 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:35:22,329 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-12-07 13:35:22,347 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-12-07 13:35:22,348 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:22,354 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:22,354 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:35:22,354 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-12-07 13:35:22,415 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:22,415 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2019-12-07 13:35:22,416 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:22,444 INFO L614 ElimStorePlain]: treesize reduction 36, result has 55.6 percent of original size [2019-12-07 13:35:22,445 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:22,445 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:45 [2019-12-07 13:35:22,736 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:22,736 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 103 [2019-12-07 13:35:22,737 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:22,763 INFO L614 ElimStorePlain]: treesize reduction 48, result has 56.0 percent of original size [2019-12-07 13:35:22,764 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:22,764 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:86, output treesize:61 [2019-12-07 13:35:22,946 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:22,947 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 165 [2019-12-07 13:35:22,948 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:22,992 INFO L614 ElimStorePlain]: treesize reduction 190, result has 23.4 percent of original size [2019-12-07 13:35:22,993 INFO L534 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:22,993 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:105, output treesize:50 [2019-12-07 13:35:23,041 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:35:23,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:23,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:35:23,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2019-12-07 13:35:23,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149814360] [2019-12-07 13:35:23,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-07 13:35:23,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:35:23,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-07 13:35:23,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2019-12-07 13:35:23,072 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 29 states. [2019-12-07 13:35:24,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:35:24,137 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2019-12-07 13:35:24,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-07 13:35:24,137 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 19 [2019-12-07 13:35:24,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:35:24,138 INFO L225 Difference]: With dead ends: 43 [2019-12-07 13:35:24,138 INFO L226 Difference]: Without dead ends: 32 [2019-12-07 13:35:24,139 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2019-12-07 13:35:24,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-07 13:35:24,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2019-12-07 13:35:24,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 13:35:24,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-12-07 13:35:24,144 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2019-12-07 13:35:24,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:35:24,145 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-12-07 13:35:24,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-07 13:35:24,145 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-12-07 13:35:24,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 13:35:24,145 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:35:24,146 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:35:24,346 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:24,347 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:35:24,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:35:24,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1189058463, now seen corresponding path program 5 times [2019-12-07 13:35:24,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:35:24,348 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154424628] [2019-12-07 13:35:24,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:35:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:35:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:24,402 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154424628] [2019-12-07 13:35:24,402 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30009842] [2019-12-07 13:35:24,402 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/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 [2019-12-07 13:35:24,428 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-07 13:35:24,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:35:24,429 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 13:35:24,430 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:35:24,459 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:24,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:35:24,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-12-07 13:35:24,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272373883] [2019-12-07 13:35:24,460 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 13:35:24,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:35:24,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 13:35:24,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-12-07 13:35:24,460 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 13 states. [2019-12-07 13:35:24,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:35:24,581 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2019-12-07 13:35:24,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 13:35:24,581 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2019-12-07 13:35:24,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:35:24,582 INFO L225 Difference]: With dead ends: 39 [2019-12-07 13:35:24,582 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 13:35:24,582 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2019-12-07 13:35:24,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 13:35:24,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2019-12-07 13:35:24,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-12-07 13:35:24,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-12-07 13:35:24,586 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2019-12-07 13:35:24,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:35:24,586 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-12-07 13:35:24,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 13:35:24,586 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-12-07 13:35:24,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 13:35:24,587 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:35:24,587 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:35:24,787 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:24,788 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:35:24,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:35:24,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1846717952, now seen corresponding path program 6 times [2019-12-07 13:35:24,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:35:24,788 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063173203] [2019-12-07 13:35:24,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:35:24,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:35:24,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:24,857 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063173203] [2019-12-07 13:35:24,857 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444425886] [2019-12-07 13:35:24,858 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:24,884 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-07 13:35:24,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:35:24,884 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 13:35:24,886 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:35:24,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:24,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:35:24,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-12-07 13:35:24,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530945417] [2019-12-07 13:35:24,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 13:35:24,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:35:24,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 13:35:24,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-12-07 13:35:24,917 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 13 states. [2019-12-07 13:35:24,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:35:24,988 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2019-12-07 13:35:24,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 13:35:24,988 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2019-12-07 13:35:24,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:35:24,989 INFO L225 Difference]: With dead ends: 43 [2019-12-07 13:35:24,989 INFO L226 Difference]: Without dead ends: 28 [2019-12-07 13:35:24,989 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-07 13:35:24,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-07 13:35:24,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2019-12-07 13:35:24,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-12-07 13:35:24,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-12-07 13:35:24,993 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2019-12-07 13:35:24,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:35:24,993 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-12-07 13:35:24,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 13:35:24,993 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-12-07 13:35:24,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-07 13:35:24,994 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:35:24,994 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:35:25,194 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:25,196 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:35:25,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:35:25,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1106368034, now seen corresponding path program 7 times [2019-12-07 13:35:25,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:35:25,197 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361624624] [2019-12-07 13:35:25,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:35:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:35:25,637 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2019-12-07 13:35:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:25,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361624624] [2019-12-07 13:35:25,850 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571362177] [2019-12-07 13:35:25,850 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:35:25,895 INFO L264 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 41 conjunts are in the unsatisfiable core [2019-12-07 13:35:25,897 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:35:25,902 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-12-07 13:35:25,902 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:25,909 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:25,912 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-12-07 13:35:25,912 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:25,919 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:25,919 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:35:25,920 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-12-07 13:35:25,950 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-12-07 13:35:25,950 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:25,958 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:25,958 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:35:25,958 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-12-07 13:35:26,022 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:26,023 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2019-12-07 13:35:26,023 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:26,040 INFO L614 ElimStorePlain]: treesize reduction 24, result has 60.0 percent of original size [2019-12-07 13:35:26,040 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:35:26,041 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:36 [2019-12-07 13:35:26,131 INFO L343 Elim1Store]: treesize reduction 10, result has 87.7 percent of original size [2019-12-07 13:35:26,131 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 98 [2019-12-07 13:35:26,132 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:26,159 INFO L614 ElimStorePlain]: treesize reduction 54, result has 47.1 percent of original size [2019-12-07 13:35:26,159 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:35:26,160 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:48 [2019-12-07 13:35:26,590 INFO L343 Elim1Store]: treesize reduction 32, result has 56.2 percent of original size [2019-12-07 13:35:26,591 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 101 [2019-12-07 13:35:26,592 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:26,653 INFO L614 ElimStorePlain]: treesize reduction 62, result has 48.3 percent of original size [2019-12-07 13:35:26,654 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:26,654 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:79, output treesize:58 [2019-12-07 13:35:27,468 WARN L192 SmtUtils]: Spent 744.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-12-07 13:35:28,605 WARN L192 SmtUtils]: Spent 494.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2019-12-07 13:35:28,654 INFO L343 Elim1Store]: treesize reduction 32, result has 75.2 percent of original size [2019-12-07 13:35:28,655 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 84 treesize of output 171 [2019-12-07 13:35:28,656 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:28,688 INFO L614 ElimStorePlain]: treesize reduction 114, result has 39.7 percent of original size [2019-12-07 13:35:28,688 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:28,688 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:94, output treesize:75 [2019-12-07 13:35:28,868 INFO L343 Elim1Store]: treesize reduction 32, result has 75.2 percent of original size [2019-12-07 13:35:28,868 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 90 treesize of output 173 [2019-12-07 13:35:28,869 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:28,900 INFO L614 ElimStorePlain]: treesize reduction 114, result has 39.7 percent of original size [2019-12-07 13:35:28,901 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:28,901 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:100, output treesize:75 [2019-12-07 13:35:28,955 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:35:28,989 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:28,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:35:28,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2019-12-07 13:35:28,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293957528] [2019-12-07 13:35:28,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-12-07 13:35:28,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:35:28,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-12-07 13:35:28,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1082, Unknown=1, NotChecked=0, Total=1190 [2019-12-07 13:35:28,990 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 35 states. [2019-12-07 13:35:30,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:35:30,429 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2019-12-07 13:35:30,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-07 13:35:30,429 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 24 [2019-12-07 13:35:30,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:35:30,429 INFO L225 Difference]: With dead ends: 60 [2019-12-07 13:35:30,429 INFO L226 Difference]: Without dead ends: 44 [2019-12-07 13:35:30,430 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=247, Invalid=2302, Unknown=1, NotChecked=0, Total=2550 [2019-12-07 13:35:30,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-07 13:35:30,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2019-12-07 13:35:30,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-07 13:35:30,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-12-07 13:35:30,435 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 24 [2019-12-07 13:35:30,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:35:30,435 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-12-07 13:35:30,435 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-12-07 13:35:30,435 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-12-07 13:35:30,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-07 13:35:30,435 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:35:30,435 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:35:30,636 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:30,636 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:35:30,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:35:30,637 INFO L82 PathProgramCache]: Analyzing trace with hash -426309664, now seen corresponding path program 1 times [2019-12-07 13:35:30,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:35:30,637 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294732245] [2019-12-07 13:35:30,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:35:30,646 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 13:35:30,646 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460751247] [2019-12-07 13:35:30,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:30,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:35:30,673 INFO L264 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-07 13:35:30,674 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:35:30,677 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-12-07 13:35:30,677 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:30,680 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:30,680 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:35:30,680 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2019-12-07 13:35:30,690 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-12-07 13:35:30,690 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:30,695 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:30,695 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:35:30,695 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2019-12-07 13:35:30,721 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:30,722 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2019-12-07 13:35:30,722 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:30,734 INFO L614 ElimStorePlain]: treesize reduction 30, result has 48.3 percent of original size [2019-12-07 13:35:30,735 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:30,735 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:28 [2019-12-07 13:35:30,792 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:30,793 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2019-12-07 13:35:30,794 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:30,809 INFO L614 ElimStorePlain]: treesize reduction 46, result has 40.3 percent of original size [2019-12-07 13:35:30,809 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:30,809 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:27 [2019-12-07 13:35:30,841 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:30,841 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2019-12-07 13:35:30,842 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:30,848 INFO L614 ElimStorePlain]: treesize reduction 14, result has 33.3 percent of original size [2019-12-07 13:35:30,848 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:35:30,848 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:33, output treesize:3 [2019-12-07 13:35:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 13:35:30,858 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294732245] [2019-12-07 13:35:30,858 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:35:30,858 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460751247] [2019-12-07 13:35:30,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 13:35:30,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-12-07 13:35:30,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141000522] [2019-12-07 13:35:30,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 13:35:30,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:35:30,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 13:35:30,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-12-07 13:35:30,859 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 11 states. [2019-12-07 13:35:31,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:35:31,062 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-12-07 13:35:31,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 13:35:31,062 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2019-12-07 13:35:31,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:35:31,063 INFO L225 Difference]: With dead ends: 46 [2019-12-07 13:35:31,063 INFO L226 Difference]: Without dead ends: 37 [2019-12-07 13:35:31,063 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-12-07 13:35:31,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-07 13:35:31,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-12-07 13:35:31,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-07 13:35:31,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-12-07 13:35:31,069 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 24 [2019-12-07 13:35:31,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:35:31,069 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-12-07 13:35:31,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 13:35:31,069 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-12-07 13:35:31,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-07 13:35:31,070 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:35:31,070 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:35:31,270 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:31,271 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:35:31,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:35:31,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1700299324, now seen corresponding path program 8 times [2019-12-07 13:35:31,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:35:31,271 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780835092] [2019-12-07 13:35:31,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:35:31,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:35:31,338 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:31,338 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780835092] [2019-12-07 13:35:31,338 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625037695] [2019-12-07 13:35:31,338 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/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 [2019-12-07 13:35:31,369 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:35:31,369 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:35:31,370 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 13:35:31,371 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:35:31,411 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:31,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:35:31,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2019-12-07 13:35:31,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167426057] [2019-12-07 13:35:31,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 13:35:31,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:35:31,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 13:35:31,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-07 13:35:31,412 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 16 states. [2019-12-07 13:35:31,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:35:31,580 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2019-12-07 13:35:31,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 13:35:31,580 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2019-12-07 13:35:31,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:35:31,580 INFO L225 Difference]: With dead ends: 47 [2019-12-07 13:35:31,580 INFO L226 Difference]: Without dead ends: 43 [2019-12-07 13:35:31,581 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2019-12-07 13:35:31,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-12-07 13:35:31,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2019-12-07 13:35:31,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-07 13:35:31,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-12-07 13:35:31,585 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 26 [2019-12-07 13:35:31,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:35:31,585 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-12-07 13:35:31,585 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 13:35:31,585 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-12-07 13:35:31,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-07 13:35:31,586 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:35:31,586 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:35:31,786 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:31,787 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:35:31,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:35:31,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1307941697, now seen corresponding path program 9 times [2019-12-07 13:35:31,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:35:31,787 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882984287] [2019-12-07 13:35:31,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:35:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:35:31,833 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:31,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882984287] [2019-12-07 13:35:31,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991047274] [2019-12-07 13:35:31,833 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:31,866 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-07 13:35:31,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:35:31,867 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 13:35:31,868 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:35:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:31,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:35:31,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2019-12-07 13:35:31,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176455666] [2019-12-07 13:35:31,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 13:35:31,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:35:31,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 13:35:31,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-07 13:35:31,909 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 16 states. [2019-12-07 13:35:32,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:35:32,012 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2019-12-07 13:35:32,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 13:35:32,012 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2019-12-07 13:35:32,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:35:32,013 INFO L225 Difference]: With dead ends: 51 [2019-12-07 13:35:32,013 INFO L226 Difference]: Without dead ends: 33 [2019-12-07 13:35:32,013 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-12-07 13:35:32,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-12-07 13:35:32,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-12-07 13:35:32,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 13:35:32,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-12-07 13:35:32,023 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2019-12-07 13:35:32,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:35:32,024 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-12-07 13:35:32,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 13:35:32,024 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-12-07 13:35:32,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-12-07 13:35:32,024 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:35:32,025 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:35:32,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:32,225 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:35:32,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:35:32,225 INFO L82 PathProgramCache]: Analyzing trace with hash 311885347, now seen corresponding path program 10 times [2019-12-07 13:35:32,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:35:32,226 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138587932] [2019-12-07 13:35:32,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:35:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:35:32,942 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:32,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138587932] [2019-12-07 13:35:32,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783900391] [2019-12-07 13:35:32,942 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/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 [2019-12-07 13:35:32,972 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:35:32,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:35:32,973 WARN L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 49 conjunts are in the unsatisfiable core [2019-12-07 13:35:32,975 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:35:32,979 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-12-07 13:35:32,979 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:32,984 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:32,986 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-12-07 13:35:32,986 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:32,991 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:32,991 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:35:32,991 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-12-07 13:35:33,018 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-12-07 13:35:33,018 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:33,026 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:33,026 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:35:33,026 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-12-07 13:35:33,112 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:33,112 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2019-12-07 13:35:33,113 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:33,134 INFO L614 ElimStorePlain]: treesize reduction 36, result has 55.6 percent of original size [2019-12-07 13:35:33,134 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:33,135 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:45 [2019-12-07 13:35:33,264 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:33,264 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 138 [2019-12-07 13:35:33,265 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:33,298 INFO L614 ElimStorePlain]: treesize reduction 72, result has 45.9 percent of original size [2019-12-07 13:35:33,299 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:33,299 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:61 [2019-12-07 13:35:33,484 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:33,485 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 220 [2019-12-07 13:35:33,485 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:33,533 INFO L614 ElimStorePlain]: treesize reduction 108, result has 41.6 percent of original size [2019-12-07 13:35:33,533 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:33,533 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:77 [2019-12-07 13:35:34,065 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:34,065 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 88 treesize of output 243 [2019-12-07 13:35:34,066 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:34,123 INFO L614 ElimStorePlain]: treesize reduction 240, result has 29.6 percent of original size [2019-12-07 13:35:34,124 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:34,124 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:118, output treesize:101 [2019-12-07 13:35:34,552 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:34,553 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 107 treesize of output 337 [2019-12-07 13:35:34,554 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:34,635 INFO L614 ElimStorePlain]: treesize reduction 312, result has 27.6 percent of original size [2019-12-07 13:35:34,636 INFO L534 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:34,636 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:142, output treesize:119 [2019-12-07 13:35:35,039 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:35,040 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 120 treesize of output 449 [2019-12-07 13:35:35,041 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:35,127 INFO L614 ElimStorePlain]: treesize reduction 272, result has 33.2 percent of original size [2019-12-07 13:35:35,127 INFO L534 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:35,128 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:160, output treesize:135 [2019-12-07 13:35:35,667 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2019-12-07 13:35:35,668 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:35,668 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 131 treesize of output 575 [2019-12-07 13:35:35,671 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:35,781 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 63 [2019-12-07 13:35:35,782 INFO L614 ElimStorePlain]: treesize reduction 620, result has 16.1 percent of original size [2019-12-07 13:35:35,848 INFO L534 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 1 dim-2 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:35,848 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 11 variables, input treesize:179, output treesize:104 [2019-12-07 13:35:35,984 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:35:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:36,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:35:36,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2019-12-07 13:35:36,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497018887] [2019-12-07 13:35:36,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-12-07 13:35:36,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:35:36,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-12-07 13:35:36,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2020, Unknown=0, NotChecked=0, Total=2162 [2019-12-07 13:35:36,054 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 47 states. [2019-12-07 13:35:38,610 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2019-12-07 13:35:42,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:35:42,325 INFO L93 Difference]: Finished difference Result 89 states and 106 transitions. [2019-12-07 13:35:42,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-12-07 13:35:42,325 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 29 [2019-12-07 13:35:42,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:35:42,325 INFO L225 Difference]: With dead ends: 89 [2019-12-07 13:35:42,325 INFO L226 Difference]: Without dead ends: 70 [2019-12-07 13:35:42,327 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1977 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=777, Invalid=7055, Unknown=0, NotChecked=0, Total=7832 [2019-12-07 13:35:42,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-12-07 13:35:42,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 58. [2019-12-07 13:35:42,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-07 13:35:42,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2019-12-07 13:35:42,335 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 29 [2019-12-07 13:35:42,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:35:42,335 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2019-12-07 13:35:42,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-12-07 13:35:42,335 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2019-12-07 13:35:42,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-07 13:35:42,336 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:35:42,336 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:35:42,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:42,537 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:35:42,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:35:42,537 INFO L82 PathProgramCache]: Analyzing trace with hash 936698307, now seen corresponding path program 2 times [2019-12-07 13:35:42,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:35:42,537 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312565359] [2019-12-07 13:35:42,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:35:42,545 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 13:35:42,545 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131616755] [2019-12-07 13:35:42,545 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:42,593 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:35:42,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:35:42,594 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 13:35:42,595 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:35:42,654 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:42,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312565359] [2019-12-07 13:35:42,654 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:35:42,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131616755] [2019-12-07 13:35:42,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 13:35:42,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-12-07 13:35:42,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015170792] [2019-12-07 13:35:42,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 13:35:42,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:35:42,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 13:35:42,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-12-07 13:35:42,655 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 13 states. [2019-12-07 13:35:42,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:35:42,786 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-12-07 13:35:42,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 13:35:42,786 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2019-12-07 13:35:42,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:35:42,787 INFO L225 Difference]: With dead ends: 71 [2019-12-07 13:35:42,787 INFO L226 Difference]: Without dead ends: 67 [2019-12-07 13:35:42,787 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-12-07 13:35:42,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-07 13:35:42,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 47. [2019-12-07 13:35:42,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-07 13:35:42,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2019-12-07 13:35:42,793 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 31 [2019-12-07 13:35:42,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:35:42,793 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2019-12-07 13:35:42,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 13:35:42,793 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2019-12-07 13:35:42,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-07 13:35:42,794 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:35:42,794 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:35:42,994 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:42,994 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:35:42,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:35:42,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1393842980, now seen corresponding path program 11 times [2019-12-07 13:35:42,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:35:42,995 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685800685] [2019-12-07 13:35:42,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:35:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:35:43,078 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:43,079 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685800685] [2019-12-07 13:35:43,079 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699778555] [2019-12-07 13:35:43,079 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:43,129 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-12-07 13:35:43,129 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:35:43,130 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 13:35:43,131 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:35:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:43,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:35:43,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2019-12-07 13:35:43,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647142338] [2019-12-07 13:35:43,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-07 13:35:43,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:35:43,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-07 13:35:43,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2019-12-07 13:35:43,190 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 19 states. [2019-12-07 13:35:43,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:35:43,312 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2019-12-07 13:35:43,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 13:35:43,312 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2019-12-07 13:35:43,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:35:43,313 INFO L225 Difference]: With dead ends: 59 [2019-12-07 13:35:43,313 INFO L226 Difference]: Without dead ends: 38 [2019-12-07 13:35:43,313 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2019-12-07 13:35:43,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-07 13:35:43,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2019-12-07 13:35:43,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-07 13:35:43,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2019-12-07 13:35:43,317 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 32 [2019-12-07 13:35:43,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:35:43,317 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2019-12-07 13:35:43,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-07 13:35:43,317 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2019-12-07 13:35:43,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-07 13:35:43,318 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:35:43,318 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:35:43,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:43,518 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:35:43,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:35:43,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1635696442, now seen corresponding path program 12 times [2019-12-07 13:35:43,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:35:43,519 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749337269] [2019-12-07 13:35:43,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:35:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:35:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:44,193 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749337269] [2019-12-07 13:35:44,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695539703] [2019-12-07 13:35:44,194 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:44,231 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-12-07 13:35:44,231 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:35:44,232 WARN L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 56 conjunts are in the unsatisfiable core [2019-12-07 13:35:44,233 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:35:44,237 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-12-07 13:35:44,237 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:44,243 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:44,243 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:35:44,243 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2019-12-07 13:35:44,272 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:35:44,272 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-12-07 13:35:44,273 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:44,278 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:44,278 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:44,278 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:27 [2019-12-07 13:35:44,320 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:35:44,329 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:44,329 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2019-12-07 13:35:44,329 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:44,347 INFO L614 ElimStorePlain]: treesize reduction 36, result has 51.4 percent of original size [2019-12-07 13:35:44,347 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:44,347 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:38 [2019-12-07 13:35:44,390 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:35:44,398 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:44,398 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2019-12-07 13:35:44,399 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:44,416 INFO L614 ElimStorePlain]: treesize reduction 36, result has 51.4 percent of original size [2019-12-07 13:35:44,416 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:44,416 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:38 [2019-12-07 13:35:44,464 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:35:44,473 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:44,473 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2019-12-07 13:35:44,474 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:44,492 INFO L614 ElimStorePlain]: treesize reduction 36, result has 51.4 percent of original size [2019-12-07 13:35:44,493 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:44,493 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:38 [2019-12-07 13:35:44,530 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:35:44,540 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:44,540 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2019-12-07 13:35:44,540 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:44,564 INFO L614 ElimStorePlain]: treesize reduction 36, result has 51.4 percent of original size [2019-12-07 13:35:44,565 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:44,565 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:38 [2019-12-07 13:35:44,707 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:35:44,711 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:44,711 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2019-12-07 13:35:44,712 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:44,728 INFO L614 ElimStorePlain]: treesize reduction 32, result has 60.5 percent of original size [2019-12-07 13:35:44,728 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:44,728 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:49 [2019-12-07 13:35:44,852 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:35:44,854 INFO L343 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2019-12-07 13:35:44,854 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 42 [2019-12-07 13:35:44,855 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:44,864 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:44,864 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:35:44,864 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:76, output treesize:42 [2019-12-07 13:35:44,991 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:35:45,003 INFO L343 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2019-12-07 13:35:45,003 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 75 [2019-12-07 13:35:45,003 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:45,021 INFO L614 ElimStorePlain]: treesize reduction 20, result has 69.7 percent of original size [2019-12-07 13:35:45,022 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:35:45,022 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:71, output treesize:46 [2019-12-07 13:35:45,172 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:35:45,190 INFO L343 Elim1Store]: treesize reduction 32, result has 56.2 percent of original size [2019-12-07 13:35:45,190 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 101 [2019-12-07 13:35:45,190 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:45,214 INFO L614 ElimStorePlain]: treesize reduction 40, result has 57.9 percent of original size [2019-12-07 13:35:45,214 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:35:45,214 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:80, output treesize:55 [2019-12-07 13:35:45,398 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:35:45,433 INFO L343 Elim1Store]: treesize reduction 49, result has 63.2 percent of original size [2019-12-07 13:35:45,433 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 81 treesize of output 159 [2019-12-07 13:35:45,434 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:45,465 INFO L614 ElimStorePlain]: treesize reduction 74, result has 48.6 percent of original size [2019-12-07 13:35:45,466 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:45,466 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:70 [2019-12-07 13:35:45,687 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:35:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-12-07 13:35:45,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:35:45,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22] total 48 [2019-12-07 13:35:45,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157276013] [2019-12-07 13:35:45,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-12-07 13:35:45,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:35:45,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-12-07 13:35:45,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2019-12-07 13:35:45,735 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 48 states. [2019-12-07 13:35:49,680 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2019-12-07 13:35:50,001 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2019-12-07 13:35:50,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:35:50,902 INFO L93 Difference]: Finished difference Result 83 states and 99 transitions. [2019-12-07 13:35:50,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-12-07 13:35:50,903 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 34 [2019-12-07 13:35:50,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:35:50,904 INFO L225 Difference]: With dead ends: 83 [2019-12-07 13:35:50,904 INFO L226 Difference]: Without dead ends: 79 [2019-12-07 13:35:50,909 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=508, Invalid=7324, Unknown=0, NotChecked=0, Total=7832 [2019-12-07 13:35:50,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-07 13:35:50,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 47. [2019-12-07 13:35:50,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-07 13:35:50,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-12-07 13:35:50,922 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 34 [2019-12-07 13:35:50,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:35:50,923 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-12-07 13:35:50,923 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-12-07 13:35:50,923 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-12-07 13:35:50,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-07 13:35:50,924 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:35:50,924 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:35:51,124 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:51,125 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:35:51,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:35:51,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1692954744, now seen corresponding path program 3 times [2019-12-07 13:35:51,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:35:51,125 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200548221] [2019-12-07 13:35:51,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:35:51,134 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 13:35:51,134 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [629838419] [2019-12-07 13:35:51,134 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/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 [2019-12-07 13:35:51,189 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-07 13:35:51,189 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:35:51,190 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-07 13:35:51,191 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:35:51,196 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-12-07 13:35:51,196 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:51,201 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:51,201 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:35:51,201 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2019-12-07 13:35:51,227 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:35:51,230 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:51,230 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 51 [2019-12-07 13:35:51,231 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:51,241 INFO L614 ElimStorePlain]: treesize reduction 24, result has 51.0 percent of original size [2019-12-07 13:35:51,241 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:51,241 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:25 [2019-12-07 13:35:51,246 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:35:51,249 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:51,249 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 51 [2019-12-07 13:35:51,250 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:51,260 INFO L614 ElimStorePlain]: treesize reduction 32, result has 43.9 percent of original size [2019-12-07 13:35:51,261 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:51,261 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:25 [2019-12-07 13:35:51,265 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:35:51,268 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:51,268 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 51 [2019-12-07 13:35:51,268 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:51,279 INFO L614 ElimStorePlain]: treesize reduction 32, result has 43.9 percent of original size [2019-12-07 13:35:51,279 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:51,279 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:25 [2019-12-07 13:35:51,284 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:35:51,288 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:51,288 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 51 [2019-12-07 13:35:51,288 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:51,299 INFO L614 ElimStorePlain]: treesize reduction 24, result has 51.0 percent of original size [2019-12-07 13:35:51,299 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:51,299 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:20 [2019-12-07 13:35:51,310 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:51,310 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2019-12-07 13:35:51,311 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-12-07 13:35:51,317 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:51,318 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:35:51,318 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:35:51,318 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:34, output treesize:16 [2019-12-07 13:35:51,330 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:35:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-12-07 13:35:51,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200548221] [2019-12-07 13:35:51,345 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:35:51,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629838419] [2019-12-07 13:35:51,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 13:35:51,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-12-07 13:35:51,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969485826] [2019-12-07 13:35:51,346 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 13:35:51,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:35:51,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 13:35:51,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-07 13:35:51,346 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 10 states. [2019-12-07 13:35:51,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:35:51,472 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2019-12-07 13:35:51,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 13:35:51,472 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2019-12-07 13:35:51,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:35:51,472 INFO L225 Difference]: With dead ends: 57 [2019-12-07 13:35:51,473 INFO L226 Difference]: Without dead ends: 53 [2019-12-07 13:35:51,473 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2019-12-07 13:35:51,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-07 13:35:51,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2019-12-07 13:35:51,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-07 13:35:51,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2019-12-07 13:35:51,479 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 34 [2019-12-07 13:35:51,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:35:51,479 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2019-12-07 13:35:51,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 13:35:51,479 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2019-12-07 13:35:51,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-07 13:35:51,480 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:35:51,480 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:35:51,680 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:51,680 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:35:51,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:35:51,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1979212484, now seen corresponding path program 4 times [2019-12-07 13:35:51,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:35:51,681 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729329607] [2019-12-07 13:35:51,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:35:51,690 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 13:35:51,690 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1917979722] [2019-12-07 13:35:51,690 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:51,758 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:35:51,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:35:51,760 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 33 conjunts are in the unsatisfiable core [2019-12-07 13:35:51,761 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:35:51,765 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-12-07 13:35:51,765 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:51,769 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:51,769 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:35:51,769 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-12-07 13:35:51,792 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-12-07 13:35:51,792 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:51,795 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:51,796 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:35:51,796 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-12-07 13:35:51,813 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:51,813 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2019-12-07 13:35:51,813 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:51,826 INFO L614 ElimStorePlain]: treesize reduction 30, result has 48.3 percent of original size [2019-12-07 13:35:51,827 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:35:51,827 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2019-12-07 13:35:56,854 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:56,855 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2019-12-07 13:35:56,855 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:56,873 INFO L614 ElimStorePlain]: treesize reduction 72, result has 33.3 percent of original size [2019-12-07 13:35:56,873 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:56,873 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:61, output treesize:36 [2019-12-07 13:35:57,371 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:57,371 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2019-12-07 13:35:57,372 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:57,389 INFO L614 ElimStorePlain]: treesize reduction 72, result has 33.3 percent of original size [2019-12-07 13:35:57,389 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:57,390 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:61, output treesize:36 [2019-12-07 13:35:57,422 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:57,423 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2019-12-07 13:35:57,423 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:57,440 INFO L614 ElimStorePlain]: treesize reduction 76, result has 32.1 percent of original size [2019-12-07 13:35:57,440 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:35:57,440 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:61, output treesize:32 [2019-12-07 13:35:57,488 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:35:57,489 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 54 [2019-12-07 13:35:57,489 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:35:57,500 INFO L614 ElimStorePlain]: treesize reduction 27, result has 35.7 percent of original size [2019-12-07 13:35:57,500 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:35:57,500 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:10 [2019-12-07 13:35:57,517 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 13:35:57,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729329607] [2019-12-07 13:35:57,517 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:35:57,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917979722] [2019-12-07 13:35:57,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 13:35:57,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-12-07 13:35:57,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943737215] [2019-12-07 13:35:57,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 13:35:57,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:35:57,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 13:35:57,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=191, Unknown=5, NotChecked=0, Total=240 [2019-12-07 13:35:57,518 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 16 states. [2019-12-07 13:36:03,337 WARN L192 SmtUtils]: Spent 764.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2019-12-07 13:36:05,652 WARN L192 SmtUtils]: Spent 883.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-12-07 13:36:07,006 WARN L192 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2019-12-07 13:36:13,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:36:13,650 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2019-12-07 13:36:13,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 13:36:13,651 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2019-12-07 13:36:13,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:36:13,651 INFO L225 Difference]: With dead ends: 58 [2019-12-07 13:36:13,651 INFO L226 Difference]: Without dead ends: 49 [2019-12-07 13:36:13,652 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=94, Invalid=357, Unknown=11, NotChecked=0, Total=462 [2019-12-07 13:36:13,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-12-07 13:36:13,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2019-12-07 13:36:13,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-07 13:36:13,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2019-12-07 13:36:13,658 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 34 [2019-12-07 13:36:13,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:36:13,659 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2019-12-07 13:36:13,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 13:36:13,659 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2019-12-07 13:36:13,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-07 13:36:13,659 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:36:13,659 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:36:13,859 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:36:13,860 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:36:13,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:36:13,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1893861880, now seen corresponding path program 5 times [2019-12-07 13:36:13,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:36:13,861 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061795391] [2019-12-07 13:36:13,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:36:13,869 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 13:36:13,869 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062647839] [2019-12-07 13:36:13,870 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/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 [2019-12-07 13:36:13,952 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-12-07 13:36:13,952 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:36:13,953 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 33 conjunts are in the unsatisfiable core [2019-12-07 13:36:13,954 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:36:13,959 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-12-07 13:36:13,960 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:13,963 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:13,963 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:36:13,964 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2019-12-07 13:36:13,977 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-12-07 13:36:13,977 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:13,981 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:13,981 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:36:13,981 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2019-12-07 13:36:14,004 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:14,005 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2019-12-07 13:36:14,005 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:14,018 INFO L614 ElimStorePlain]: treesize reduction 30, result has 48.3 percent of original size [2019-12-07 13:36:14,019 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:36:14,019 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2019-12-07 13:36:14,055 INFO L343 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2019-12-07 13:36:14,055 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2019-12-07 13:36:14,055 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:14,062 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:14,062 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:36:14,062 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2019-12-07 13:36:14,114 INFO L343 Elim1Store]: treesize reduction 36, result has 54.4 percent of original size [2019-12-07 13:36:14,114 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 99 [2019-12-07 13:36:14,114 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:14,129 INFO L614 ElimStorePlain]: treesize reduction 78, result has 31.0 percent of original size [2019-12-07 13:36:14,129 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:36:14,129 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:35 [2019-12-07 13:36:14,165 INFO L343 Elim1Store]: treesize reduction 36, result has 54.4 percent of original size [2019-12-07 13:36:14,165 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 99 [2019-12-07 13:36:14,166 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:14,180 INFO L614 ElimStorePlain]: treesize reduction 72, result has 32.7 percent of original size [2019-12-07 13:36:14,181 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:36:14,181 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:31 [2019-12-07 13:36:14,238 INFO L343 Elim1Store]: treesize reduction 36, result has 54.4 percent of original size [2019-12-07 13:36:14,238 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 55 [2019-12-07 13:36:14,239 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:14,245 INFO L614 ElimStorePlain]: treesize reduction 39, result has 15.2 percent of original size [2019-12-07 13:36:14,246 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:36:14,246 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:7 [2019-12-07 13:36:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 21 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 13:36:14,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061795391] [2019-12-07 13:36:14,260 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:36:14,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062647839] [2019-12-07 13:36:14,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 13:36:14,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-12-07 13:36:14,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644060314] [2019-12-07 13:36:14,261 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-07 13:36:14,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:36:14,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-07 13:36:14,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2019-12-07 13:36:14,261 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 15 states. [2019-12-07 13:36:14,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:36:14,484 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2019-12-07 13:36:14,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 13:36:14,484 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2019-12-07 13:36:14,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:36:14,485 INFO L225 Difference]: With dead ends: 65 [2019-12-07 13:36:14,485 INFO L226 Difference]: Without dead ends: 53 [2019-12-07 13:36:14,485 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2019-12-07 13:36:14,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-07 13:36:14,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2019-12-07 13:36:14,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-07 13:36:14,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-12-07 13:36:14,492 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34 [2019-12-07 13:36:14,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:36:14,492 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-12-07 13:36:14,492 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-07 13:36:14,492 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-12-07 13:36:14,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-07 13:36:14,492 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:36:14,492 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:36:14,693 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:36:14,693 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:36:14,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:36:14,694 INFO L82 PathProgramCache]: Analyzing trace with hash -358448264, now seen corresponding path program 6 times [2019-12-07 13:36:14,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:36:14,694 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70981238] [2019-12-07 13:36:14,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:36:14,699 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 13:36:14,700 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712488200] [2019-12-07 13:36:14,700 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:36:14,807 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-12-07 13:36:14,807 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:36:14,808 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-07 13:36:14,808 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:36:14,815 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-12-07 13:36:14,815 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:14,819 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:14,819 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:36:14,819 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2019-12-07 13:36:14,834 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:14,834 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-12-07 13:36:14,835 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:14,839 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:14,840 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:36:14,840 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2019-12-07 13:36:14,863 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:14,864 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:14,865 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:14,865 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:14,865 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2019-12-07 13:36:14,866 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:14,873 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:14,874 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:36:14,874 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:41 [2019-12-07 13:36:14,911 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:14,912 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:14,913 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:14,914 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:14,914 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:14,915 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:14,916 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:14,916 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 50 [2019-12-07 13:36:14,916 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:14,928 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:14,929 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-12-07 13:36:14,929 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:60 [2019-12-07 13:36:17,334 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:17,335 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:17,335 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:17,336 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:17,337 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:17,338 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:17,374 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:17,374 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 196 [2019-12-07 13:36:17,374 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:17,423 INFO L614 ElimStorePlain]: treesize reduction 132, result has 35.0 percent of original size [2019-12-07 13:36:17,424 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-12-07 13:36:17,424 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:75, output treesize:71 [2019-12-07 13:36:21,553 WARN L192 SmtUtils]: Spent 1.78 s on a formula simplification that was a NOOP. DAG size: 46 [2019-12-07 13:36:26,724 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:26,725 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:26,727 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:26,727 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:26,728 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:26,729 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:26,729 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:26,730 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:26,731 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:26,733 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:26,734 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 31 [2019-12-07 13:36:26,734 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:26,740 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:26,740 INFO L534 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:36:26,740 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:3 [2019-12-07 13:36:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-12-07 13:36:26,754 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70981238] [2019-12-07 13:36:26,754 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:36:26,754 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712488200] [2019-12-07 13:36:26,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 13:36:26,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-12-07 13:36:26,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550749487] [2019-12-07 13:36:26,754 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-07 13:36:26,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:36:26,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-07 13:36:26,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=160, Unknown=6, NotChecked=0, Total=210 [2019-12-07 13:36:26,755 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 15 states. [2019-12-07 13:36:28,620 WARN L192 SmtUtils]: Spent 567.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2019-12-07 13:36:31,056 WARN L192 SmtUtils]: Spent 2.42 s on a formula simplification that was a NOOP. DAG size: 49 [2019-12-07 13:36:31,499 WARN L192 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2019-12-07 13:36:33,025 WARN L192 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2019-12-07 13:36:33,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:36:33,062 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2019-12-07 13:36:33,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 13:36:33,062 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2019-12-07 13:36:33,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:36:33,062 INFO L225 Difference]: With dead ends: 56 [2019-12-07 13:36:33,062 INFO L226 Difference]: Without dead ends: 38 [2019-12-07 13:36:33,063 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=84, Invalid=252, Unknown=6, NotChecked=0, Total=342 [2019-12-07 13:36:33,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-07 13:36:33,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-12-07 13:36:33,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-07 13:36:33,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2019-12-07 13:36:33,068 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 34 [2019-12-07 13:36:33,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:36:33,068 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2019-12-07 13:36:33,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-07 13:36:33,068 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2019-12-07 13:36:33,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-12-07 13:36:33,068 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:36:33,068 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:36:33,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:36:33,269 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:36:33,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:36:33,270 INFO L82 PathProgramCache]: Analyzing trace with hash -127223707, now seen corresponding path program 13 times [2019-12-07 13:36:33,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:36:33,270 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118174612] [2019-12-07 13:36:33,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:36:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:36:33,346 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:36:33,347 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118174612] [2019-12-07 13:36:33,347 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132967925] [2019-12-07 13:36:33,347 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:36:33,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:36:33,372 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 13:36:33,373 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:36:33,442 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:36:33,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:36:33,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2019-12-07 13:36:33,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412119144] [2019-12-07 13:36:33,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-07 13:36:33,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:36:33,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-07 13:36:33,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2019-12-07 13:36:33,443 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 22 states. [2019-12-07 13:36:33,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:36:33,584 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2019-12-07 13:36:33,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-07 13:36:33,584 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 37 [2019-12-07 13:36:33,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:36:33,585 INFO L225 Difference]: With dead ends: 72 [2019-12-07 13:36:33,585 INFO L226 Difference]: Without dead ends: 46 [2019-12-07 13:36:33,585 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2019-12-07 13:36:33,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-12-07 13:36:33,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2019-12-07 13:36:33,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-07 13:36:33,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2019-12-07 13:36:33,591 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 37 [2019-12-07 13:36:33,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:36:33,591 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2019-12-07 13:36:33,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-07 13:36:33,591 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2019-12-07 13:36:33,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-07 13:36:33,591 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:36:33,591 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:36:33,792 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:36:33,792 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:36:33,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:36:33,792 INFO L82 PathProgramCache]: Analyzing trace with hash 639592647, now seen corresponding path program 14 times [2019-12-07 13:36:33,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:36:33,793 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991588115] [2019-12-07 13:36:33,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:36:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:36:34,668 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:36:34,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991588115] [2019-12-07 13:36:34,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143766168] [2019-12-07 13:36:34,669 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:36:34,697 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:36:34,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:36:34,698 WARN L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 65 conjunts are in the unsatisfiable core [2019-12-07 13:36:34,699 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:36:34,704 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-12-07 13:36:34,704 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:34,709 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:34,709 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:36:34,710 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2019-12-07 13:36:34,743 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:34,744 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-12-07 13:36:34,744 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:34,750 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:34,750 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:36:34,751 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2019-12-07 13:36:34,832 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:34,840 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:34,840 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2019-12-07 13:36:34,840 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:34,858 INFO L614 ElimStorePlain]: treesize reduction 24, result has 60.7 percent of original size [2019-12-07 13:36:34,858 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:36:34,858 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2019-12-07 13:36:35,066 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:35,114 INFO L343 Elim1Store]: treesize reduction 52, result has 45.8 percent of original size [2019-12-07 13:36:35,114 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 71 [2019-12-07 13:36:35,115 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:35,163 INFO L614 ElimStorePlain]: treesize reduction 24, result has 67.1 percent of original size [2019-12-07 13:36:35,163 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:36:35,164 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:49 [2019-12-07 13:36:35,448 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:35,534 INFO L343 Elim1Store]: treesize reduction 122, result has 31.5 percent of original size [2019-12-07 13:36:35,534 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 86 [2019-12-07 13:36:35,535 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:35,582 INFO L614 ElimStorePlain]: treesize reduction 24, result has 71.8 percent of original size [2019-12-07 13:36:35,582 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:36:35,582 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:61 [2019-12-07 13:36:35,695 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:35,733 INFO L343 Elim1Store]: treesize reduction 210, result has 24.5 percent of original size [2019-12-07 13:36:35,733 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 101 [2019-12-07 13:36:35,733 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:35,761 INFO L614 ElimStorePlain]: treesize reduction 24, result has 75.3 percent of original size [2019-12-07 13:36:35,762 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:36:35,762 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:77, output treesize:73 [2019-12-07 13:36:36,005 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:36,141 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 38 [2019-12-07 13:36:36,141 INFO L343 Elim1Store]: treesize reduction 316, result has 20.2 percent of original size [2019-12-07 13:36:36,142 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 116 [2019-12-07 13:36:36,143 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:36,240 INFO L614 ElimStorePlain]: treesize reduction 24, result has 78.6 percent of original size [2019-12-07 13:36:36,241 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:36:36,241 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:92, output treesize:88 [2019-12-07 13:36:37,035 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:37,125 INFO L343 Elim1Store]: treesize reduction 170, result has 32.8 percent of original size [2019-12-07 13:36:37,126 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 179 [2019-12-07 13:36:37,127 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:37,168 INFO L614 ElimStorePlain]: treesize reduction 154, result has 36.9 percent of original size [2019-12-07 13:36:37,168 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:36:37,169 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:107, output treesize:90 [2019-12-07 13:36:37,979 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:38,093 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 78 [2019-12-07 13:36:38,093 INFO L343 Elim1Store]: treesize reduction 170, result has 51.6 percent of original size [2019-12-07 13:36:38,094 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 115 treesize of output 291 [2019-12-07 13:36:38,095 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:38,160 INFO L614 ElimStorePlain]: treesize reduction 238, result has 29.4 percent of original size [2019-12-07 13:36:38,160 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 13:36:38,160 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:126, output treesize:99 [2019-12-07 13:36:38,359 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:38,406 INFO L343 Elim1Store]: treesize reduction 170, result has 32.8 percent of original size [2019-12-07 13:36:38,407 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 179 [2019-12-07 13:36:38,408 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:38,448 INFO L614 ElimStorePlain]: treesize reduction 148, result has 37.3 percent of original size [2019-12-07 13:36:38,448 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:36:38,448 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:107, output treesize:88 [2019-12-07 13:36:38,666 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:38,716 INFO L343 Elim1Store]: treesize reduction 170, result has 32.8 percent of original size [2019-12-07 13:36:38,716 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 179 [2019-12-07 13:36:38,717 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:38,756 INFO L614 ElimStorePlain]: treesize reduction 134, result has 40.7 percent of original size [2019-12-07 13:36:38,756 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:36:38,756 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:107, output treesize:92 [2019-12-07 13:36:40,970 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:41,083 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 78 [2019-12-07 13:36:41,084 INFO L343 Elim1Store]: treesize reduction 170, result has 51.6 percent of original size [2019-12-07 13:36:41,084 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 117 treesize of output 293 [2019-12-07 13:36:41,085 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:41,143 INFO L614 ElimStorePlain]: treesize reduction 387, result has 23.4 percent of original size [2019-12-07 13:36:41,143 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 13:36:41,143 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:128, output treesize:118 [2019-12-07 13:36:42,105 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:36:42,298 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 114 [2019-12-07 13:36:42,298 INFO L343 Elim1Store]: treesize reduction 170, result has 63.4 percent of original size [2019-12-07 13:36:42,298 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 143 treesize of output 424 [2019-12-07 13:36:42,300 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:42,372 INFO L614 ElimStorePlain]: treesize reduction 316, result has 25.8 percent of original size [2019-12-07 13:36:42,373 INFO L534 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-12-07 13:36:42,373 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:154, output treesize:110 [2019-12-07 13:36:42,589 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:36:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:36:42,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:36:42,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29] total 59 [2019-12-07 13:36:42,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202522632] [2019-12-07 13:36:42,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-12-07 13:36:42,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:36:42,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-12-07 13:36:42,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=3239, Unknown=3, NotChecked=0, Total=3422 [2019-12-07 13:36:42,782 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 59 states. [2019-12-07 13:36:46,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:36:46,983 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2019-12-07 13:36:46,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-07 13:36:46,983 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 39 [2019-12-07 13:36:46,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:36:46,984 INFO L225 Difference]: With dead ends: 70 [2019-12-07 13:36:46,984 INFO L226 Difference]: Without dead ends: 66 [2019-12-07 13:36:46,986 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1863 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=410, Invalid=6897, Unknown=3, NotChecked=0, Total=7310 [2019-12-07 13:36:46,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-12-07 13:36:46,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2019-12-07 13:36:46,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-12-07 13:36:46,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2019-12-07 13:36:46,994 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 39 [2019-12-07 13:36:46,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:36:46,995 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2019-12-07 13:36:46,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-12-07 13:36:46,995 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2019-12-07 13:36:46,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-07 13:36:46,995 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:36:46,995 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:36:47,195 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:36:47,196 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:36:47,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:36:47,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1319651017, now seen corresponding path program 7 times [2019-12-07 13:36:47,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:36:47,196 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396146110] [2019-12-07 13:36:47,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:36:47,206 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 13:36:47,206 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831835526] [2019-12-07 13:36:47,207 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/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 [2019-12-07 13:36:47,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:36:47,240 INFO L264 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 35 conjunts are in the unsatisfiable core [2019-12-07 13:36:47,241 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:36:47,244 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-12-07 13:36:47,244 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:47,247 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:47,247 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:36:47,247 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2019-12-07 13:36:47,271 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-12-07 13:36:47,271 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:47,275 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:47,275 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:36:47,275 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2019-12-07 13:36:47,304 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:47,304 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2019-12-07 13:36:47,305 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:47,319 INFO L614 ElimStorePlain]: treesize reduction 30, result has 48.3 percent of original size [2019-12-07 13:36:47,320 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:36:47,320 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:28 [2019-12-07 13:36:47,366 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:47,367 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2019-12-07 13:36:47,367 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:47,383 INFO L614 ElimStorePlain]: treesize reduction 76, result has 29.0 percent of original size [2019-12-07 13:36:47,383 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:36:47,384 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:31 [2019-12-07 13:36:47,427 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:47,427 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2019-12-07 13:36:47,428 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:47,442 INFO L614 ElimStorePlain]: treesize reduction 72, result has 30.1 percent of original size [2019-12-07 13:36:47,442 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:36:47,443 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:31 [2019-12-07 13:36:47,489 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:47,489 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2019-12-07 13:36:47,489 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:47,503 INFO L614 ElimStorePlain]: treesize reduction 88, result has 26.1 percent of original size [2019-12-07 13:36:47,503 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:36:47,503 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:31 [2019-12-07 13:36:47,561 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:47,561 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2019-12-07 13:36:47,561 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:47,578 INFO L614 ElimStorePlain]: treesize reduction 46, result has 40.3 percent of original size [2019-12-07 13:36:47,579 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:36:47,579 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:27 [2019-12-07 13:36:47,629 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:47,629 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2019-12-07 13:36:47,629 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:47,634 INFO L614 ElimStorePlain]: treesize reduction 14, result has 33.3 percent of original size [2019-12-07 13:36:47,634 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:36:47,635 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:33, output treesize:3 [2019-12-07 13:36:47,651 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 23 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 13:36:47,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396146110] [2019-12-07 13:36:47,651 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:36:47,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831835526] [2019-12-07 13:36:47,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 13:36:47,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-12-07 13:36:47,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376118711] [2019-12-07 13:36:47,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-07 13:36:47,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:36:47,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-07 13:36:47,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2019-12-07 13:36:47,652 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 17 states. [2019-12-07 13:36:47,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:36:47,950 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2019-12-07 13:36:47,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 13:36:47,950 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2019-12-07 13:36:47,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:36:47,950 INFO L225 Difference]: With dead ends: 70 [2019-12-07 13:36:47,950 INFO L226 Difference]: Without dead ends: 61 [2019-12-07 13:36:47,951 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2019-12-07 13:36:47,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-12-07 13:36:47,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2019-12-07 13:36:47,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-07 13:36:47,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2019-12-07 13:36:47,960 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 39 [2019-12-07 13:36:47,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:36:47,960 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2019-12-07 13:36:47,960 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-07 13:36:47,960 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2019-12-07 13:36:47,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-12-07 13:36:47,960 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:36:47,960 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:36:48,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:36:48,161 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:36:48,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:36:48,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1184266071, now seen corresponding path program 15 times [2019-12-07 13:36:48,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:36:48,162 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135525983] [2019-12-07 13:36:48,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:36:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:36:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 25 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:36:48,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135525983] [2019-12-07 13:36:48,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931074371] [2019-12-07 13:36:48,253 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:36:48,332 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-12-07 13:36:48,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:36:48,333 INFO L264 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 13:36:48,334 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:36:48,411 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:36:48,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:36:48,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2019-12-07 13:36:48,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391347197] [2019-12-07 13:36:48,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-07 13:36:48,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:36:48,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-07 13:36:48,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2019-12-07 13:36:48,412 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 25 states. [2019-12-07 13:36:48,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:36:48,769 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2019-12-07 13:36:48,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-07 13:36:48,769 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 41 [2019-12-07 13:36:48,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:36:48,770 INFO L225 Difference]: With dead ends: 76 [2019-12-07 13:36:48,770 INFO L226 Difference]: Without dead ends: 72 [2019-12-07 13:36:48,770 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=342, Invalid=1140, Unknown=0, NotChecked=0, Total=1482 [2019-12-07 13:36:48,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-12-07 13:36:48,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 43. [2019-12-07 13:36:48,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-12-07 13:36:48,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2019-12-07 13:36:48,777 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 41 [2019-12-07 13:36:48,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:36:48,777 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2019-12-07 13:36:48,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-07 13:36:48,777 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2019-12-07 13:36:48,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-12-07 13:36:48,777 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:36:48,778 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:36:48,978 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:36:48,978 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:36:48,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:36:48,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1126332488, now seen corresponding path program 16 times [2019-12-07 13:36:48,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:36:48,979 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974013647] [2019-12-07 13:36:48,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:36:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:36:49,073 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 54 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:36:49,073 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974013647] [2019-12-07 13:36:49,073 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379152678] [2019-12-07 13:36:49,073 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/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 [2019-12-07 13:36:49,112 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:36:49,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:36:49,113 INFO L264 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 13:36:49,113 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:36:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:36:49,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:36:49,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2019-12-07 13:36:49,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922632518] [2019-12-07 13:36:49,199 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-07 13:36:49,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:36:49,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-07 13:36:49,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2019-12-07 13:36:49,200 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 25 states. [2019-12-07 13:36:49,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:36:49,358 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2019-12-07 13:36:49,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-07 13:36:49,358 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 42 [2019-12-07 13:36:49,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:36:49,358 INFO L225 Difference]: With dead ends: 80 [2019-12-07 13:36:49,358 INFO L226 Difference]: Without dead ends: 51 [2019-12-07 13:36:49,359 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=247, Invalid=745, Unknown=0, NotChecked=0, Total=992 [2019-12-07 13:36:49,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-12-07 13:36:49,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2019-12-07 13:36:49,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-12-07 13:36:49,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2019-12-07 13:36:49,366 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 42 [2019-12-07 13:36:49,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:36:49,366 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2019-12-07 13:36:49,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-07 13:36:49,366 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2019-12-07 13:36:49,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-07 13:36:49,366 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:36:49,367 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:36:49,567 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:36:49,567 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:36:49,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:36:49,567 INFO L82 PathProgramCache]: Analyzing trace with hash -70138730, now seen corresponding path program 17 times [2019-12-07 13:36:49,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:36:49,568 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447257692] [2019-12-07 13:36:49,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:36:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:36:50,812 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:36:50,812 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447257692] [2019-12-07 13:36:50,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216683484] [2019-12-07 13:36:50,813 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:36:50,958 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-12-07 13:36:50,958 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:36:50,960 WARN L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 73 conjunts are in the unsatisfiable core [2019-12-07 13:36:50,961 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:36:50,964 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-12-07 13:36:50,965 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:50,970 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:50,972 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-12-07 13:36:50,972 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:50,977 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:50,977 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:36:50,977 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-12-07 13:36:51,013 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-12-07 13:36:51,013 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:51,019 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:51,019 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:36:51,019 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-12-07 13:36:51,114 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:51,114 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2019-12-07 13:36:51,115 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:51,135 INFO L614 ElimStorePlain]: treesize reduction 36, result has 55.6 percent of original size [2019-12-07 13:36:51,135 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:36:51,135 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:45 [2019-12-07 13:36:51,291 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:51,291 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 138 [2019-12-07 13:36:51,291 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:51,330 INFO L614 ElimStorePlain]: treesize reduction 72, result has 45.9 percent of original size [2019-12-07 13:36:51,331 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 13:36:51,331 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:61 [2019-12-07 13:36:51,732 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:51,732 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 220 [2019-12-07 13:36:51,733 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:51,783 INFO L614 ElimStorePlain]: treesize reduction 108, result has 41.6 percent of original size [2019-12-07 13:36:51,784 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-12-07 13:36:51,784 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:77 [2019-12-07 13:36:52,204 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:52,205 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 318 [2019-12-07 13:36:52,205 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:52,265 INFO L614 ElimStorePlain]: treesize reduction 144, result has 39.2 percent of original size [2019-12-07 13:36:52,266 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-12-07 13:36:52,266 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:93 [2019-12-07 13:36:52,715 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2019-12-07 13:36:52,715 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:52,715 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 432 [2019-12-07 13:36:52,716 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:52,798 INFO L614 ElimStorePlain]: treesize reduction 180, result has 37.7 percent of original size [2019-12-07 13:36:52,799 INFO L534 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-12-07 13:36:52,799 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:113, output treesize:109 [2019-12-07 13:36:54,692 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2019-12-07 13:36:54,692 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:36:54,692 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 89 treesize of output 562 [2019-12-07 13:36:54,693 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:36:54,795 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2019-12-07 13:36:54,795 INFO L614 ElimStorePlain]: treesize reduction 216, result has 36.7 percent of original size [2019-12-07 13:36:54,796 INFO L534 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-12-07 13:36:54,796 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:129, output treesize:125 [2019-12-07 13:37:06,687 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2019-12-07 13:37:06,687 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:37:06,687 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 121 treesize of output 573 [2019-12-07 13:37:06,690 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:37:06,800 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 73 [2019-12-07 13:37:06,800 INFO L614 ElimStorePlain]: treesize reduction 456, result has 23.6 percent of original size [2019-12-07 13:37:06,801 INFO L534 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-2 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-12-07 13:37:06,801 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:166, output treesize:141 [2019-12-07 13:37:07,442 WARN L192 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2019-12-07 13:37:07,443 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:37:07,443 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 132 treesize of output 715 [2019-12-07 13:37:07,446 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:37:07,607 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 82 [2019-12-07 13:37:07,607 INFO L614 ElimStorePlain]: treesize reduction 784, result has 17.2 percent of original size [2019-12-07 13:37:07,608 INFO L534 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-2 vars, End of recursive call: 8 dim-0 vars, and 1 xjuncts. [2019-12-07 13:37:07,608 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:182, output treesize:163 [2019-12-07 13:37:08,484 WARN L192 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2019-12-07 13:37:08,484 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:37:08,484 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 149 treesize of output 875 [2019-12-07 13:37:08,488 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:37:08,658 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 90 [2019-12-07 13:37:08,658 INFO L614 ElimStorePlain]: treesize reduction 750, result has 19.3 percent of original size [2019-12-07 13:37:08,659 INFO L534 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-2 vars, End of recursive call: 9 dim-0 vars, and 1 xjuncts. [2019-12-07 13:37:08,659 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 10 variables, input treesize:204, output treesize:179 [2019-12-07 13:37:09,543 WARN L192 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2019-12-07 13:37:09,999 WARN L192 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 267 [2019-12-07 13:37:10,000 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:37:10,000 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 160 treesize of output 1049 [2019-12-07 13:37:10,004 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:37:10,228 WARN L192 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 96 [2019-12-07 13:37:10,228 INFO L614 ElimStorePlain]: treesize reduction 1040, result has 16.1 percent of original size [2019-12-07 13:37:10,229 INFO L534 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 1 dim-2 vars, End of recursive call: 10 dim-0 vars, and 1 xjuncts. [2019-12-07 13:37:10,229 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 11 variables, input treesize:220, output treesize:199 [2019-12-07 13:37:10,713 WARN L192 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2019-12-07 13:37:11,753 WARN L192 SmtUtils]: Spent 779.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2019-12-07 13:37:14,753 WARN L192 SmtUtils]: Spent 2.77 s on a formula simplification that was a NOOP. DAG size: 108 [2019-12-07 13:37:15,375 WARN L192 SmtUtils]: Spent 612.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2019-12-07 13:37:15,375 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:37:15,375 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 66 case distinctions, treesize of input 175 treesize of output 1239 [2019-12-07 13:37:15,380 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:37:15,591 WARN L192 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 104 [2019-12-07 13:37:15,592 INFO L614 ElimStorePlain]: treesize reduction 722, result has 22.6 percent of original size [2019-12-07 13:37:15,592 INFO L534 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 1 dim-2 vars, End of recursive call: 11 dim-0 vars, and 1 xjuncts. [2019-12-07 13:37:15,592 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 12 variables, input treesize:240, output treesize:211 [2019-12-07 13:37:17,410 WARN L192 SmtUtils]: Spent 1.59 s on a formula simplification that was a NOOP. DAG size: 108 [2019-12-07 13:37:19,652 WARN L192 SmtUtils]: Spent 1.82 s on a formula simplification that was a NOOP. DAG size: 111 [2019-12-07 13:37:32,476 WARN L192 SmtUtils]: Spent 12.57 s on a formula simplification that was a NOOP. DAG size: 116 [2019-12-07 13:37:33,310 WARN L192 SmtUtils]: Spent 824.00 ms on a formula simplification that was a NOOP. DAG size: 367 [2019-12-07 13:37:33,311 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:37:33,311 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 1 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 78 case distinctions, treesize of input 182 treesize of output 1445 [2019-12-07 13:37:33,318 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:37:33,597 WARN L192 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 111 [2019-12-07 13:37:33,597 INFO L614 ElimStorePlain]: treesize reduction 1256, result has 15.3 percent of original size [2019-12-07 13:37:33,598 INFO L534 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 1 dim-2 vars, End of recursive call: 12 dim-0 vars, and 1 xjuncts. [2019-12-07 13:37:33,598 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 13 variables, input treesize:252, output treesize:227 [2019-12-07 13:37:41,714 WARN L192 SmtUtils]: Spent 7.81 s on a formula simplification that was a NOOP. DAG size: 115 [2019-12-07 13:37:55,143 WARN L192 SmtUtils]: Spent 9.08 s on a formula simplification that was a NOOP. DAG size: 118 [2019-12-07 13:40:26,211 WARN L192 SmtUtils]: Spent 2.51 m on a formula simplification. DAG size of input: 124 DAG size of output: 122 [2019-12-07 13:40:27,379 WARN L192 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 423 [2019-12-07 13:40:27,380 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:40:27,380 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 1 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 91 case distinctions, treesize of input 186 treesize of output 1664 [2019-12-07 13:40:27,388 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:40:27,757 WARN L192 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 93 [2019-12-07 13:40:27,758 INFO L614 ElimStorePlain]: treesize reduction 2114, result has 7.6 percent of original size [2019-12-07 13:40:28,016 INFO L534 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 1 dim-2 vars, End of recursive call: 10 dim-0 vars, and 1 xjuncts. [2019-12-07 13:40:28,016 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 17 variables, input treesize:264, output treesize:145 [2019-12-07 13:41:48,924 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-12-07 13:41:48,924 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") [2019-12-07 13:41:48,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 13:41:48,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-12-07 13:41:48,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100105860] [2019-12-07 13:41:48,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-12-07 13:41:48,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:41:48,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-12-07 13:41:48,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=4843, Unknown=3, NotChecked=0, Total=5112 [2019-12-07 13:41:48,926 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 36 states. [2019-12-07 13:41:48,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 13:41:49,127 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:41:49,128 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@18a8e3d at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.lock(ManagedScript.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:354) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:202) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:127) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:60) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:62) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:359) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1066) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:968) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:188) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:698) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:627) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:454) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) 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) [2019-12-07 13:41:49,134 INFO L168 Benchmark]: Toolchain (without parser) took 389799.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 944.8 MB in the beginning and 837.5 MB in the end (delta: 107.3 MB). Peak memory consumption was 252.0 MB. Max. memory is 11.5 GB. [2019-12-07 13:41:49,135 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 960.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:41:49,135 INFO L168 Benchmark]: CACSL2BoogieTranslator took 194.40 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 104.3 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -152.9 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. [2019-12-07 13:41:49,136 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.86 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:41:49,136 INFO L168 Benchmark]: Boogie Preprocessor took 20.63 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:41:49,137 INFO L168 Benchmark]: RCFGBuilder took 179.37 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. [2019-12-07 13:41:49,137 INFO L168 Benchmark]: TraceAbstraction took 389375.37 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 40.4 MB). Free memory was 1.1 GB in the beginning and 837.5 MB in the end (delta: 237.8 MB). Peak memory consumption was 278.2 MB. Max. memory is 11.5 GB. [2019-12-07 13:41:49,140 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 960.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 194.40 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 104.3 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -152.9 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.86 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.63 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 179.37 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 389375.37 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 40.4 MB). Free memory was 1.1 GB in the beginning and 837.5 MB in the end (delta: 237.8 MB). Peak memory consumption was 278.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@18a8e3d de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@18a8e3d: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.lock(ManagedScript.java:83) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-f470102 [2019-12-07 13:41:50,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 13:41:50,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 13:41:50,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 13:41:50,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 13:41:50,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 13:41:50,278 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 13:41:50,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 13:41:50,280 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 13:41:50,281 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 13:41:50,281 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 13:41:50,282 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 13:41:50,282 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 13:41:50,283 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 13:41:50,284 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 13:41:50,285 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 13:41:50,285 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 13:41:50,286 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 13:41:50,287 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 13:41:50,289 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 13:41:50,290 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 13:41:50,291 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 13:41:50,292 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 13:41:50,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 13:41:50,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 13:41:50,294 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 13:41:50,294 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 13:41:50,295 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 13:41:50,295 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 13:41:50,296 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 13:41:50,296 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 13:41:50,297 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 13:41:50,297 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 13:41:50,298 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 13:41:50,298 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 13:41:50,298 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 13:41:50,299 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 13:41:50,299 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 13:41:50,299 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 13:41:50,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 13:41:50,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 13:41:50,301 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-12-07 13:41:50,311 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 13:41:50,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 13:41:50,312 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 13:41:50,312 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 13:41:50,312 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 13:41:50,312 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 13:41:50,312 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 13:41:50,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 13:41:50,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 13:41:50,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 13:41:50,313 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 13:41:50,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 13:41:50,313 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-12-07 13:41:50,313 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-12-07 13:41:50,313 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 13:41:50,313 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 13:41:50,313 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 13:41:50,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 13:41:50,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 13:41:50,314 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 13:41:50,314 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 13:41:50,314 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 13:41:50,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 13:41:50,314 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 13:41:50,314 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 13:41:50,315 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 13:41:50,315 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-12-07 13:41:50,315 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-12-07 13:41:50,315 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 13:41:50,315 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 13:41:50,315 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 13:41:50,315 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_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43265b9011f518c5ca7acf1a863628988ab06054 [2019-12-07 13:41:50,493 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 13:41:50,500 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 13:41:50,503 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 13:41:50,504 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 13:41:50,504 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 13:41:50,504 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/../../sv-benchmarks/c/array-fpi/s3if.c [2019-12-07 13:41:50,541 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/data/3397da9aa/a11c4b979f4a493380e1d7e035f2657c/FLAG33d46e226 [2019-12-07 13:41:50,972 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 13:41:50,972 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/sv-benchmarks/c/array-fpi/s3if.c [2019-12-07 13:41:50,976 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/data/3397da9aa/a11c4b979f4a493380e1d7e035f2657c/FLAG33d46e226 [2019-12-07 13:41:50,985 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/data/3397da9aa/a11c4b979f4a493380e1d7e035f2657c [2019-12-07 13:41:50,987 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 13:41:50,988 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 13:41:50,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 13:41:50,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 13:41:50,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 13:41:50,991 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:41:50" (1/1) ... [2019-12-07 13:41:50,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bb84b85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:41:50, skipping insertion in model container [2019-12-07 13:41:50,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:41:50" (1/1) ... [2019-12-07 13:41:50,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 13:41:51,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 13:41:51,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:41:51,124 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 13:41:51,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:41:51,151 INFO L208 MainTranslator]: Completed translation [2019-12-07 13:41:51,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:41:51 WrapperNode [2019-12-07 13:41:51,151 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 13:41:51,152 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 13:41:51,152 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 13:41:51,152 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 13:41:51,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:41:51" (1/1) ... [2019-12-07 13:41:51,201 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:41:51" (1/1) ... [2019-12-07 13:41:51,217 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 13:41:51,217 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 13:41:51,218 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 13:41:51,218 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 13:41:51,223 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:41:51" (1/1) ... [2019-12-07 13:41:51,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:41:51" (1/1) ... [2019-12-07 13:41:51,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:41:51" (1/1) ... [2019-12-07 13:41:51,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:41:51" (1/1) ... [2019-12-07 13:41:51,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:41:51" (1/1) ... [2019-12-07 13:41:51,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:41:51" (1/1) ... [2019-12-07 13:41:51,235 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:41:51" (1/1) ... [2019-12-07 13:41:51,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 13:41:51,237 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 13:41:51,237 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 13:41:51,237 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 13:41:51,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:41:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 13:41:51,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 13:41:51,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2019-12-07 13:41:51,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 13:41:51,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-12-07 13:41:51,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 13:41:51,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 13:41:51,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2019-12-07 13:41:51,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 13:41:51,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-12-07 13:41:51,453 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 13:41:51,453 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-12-07 13:41:51,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:41:51 BoogieIcfgContainer [2019-12-07 13:41:51,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 13:41:51,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 13:41:51,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 13:41:51,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 13:41:51,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:41:50" (1/3) ... [2019-12-07 13:41:51,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@396cd227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:41:51, skipping insertion in model container [2019-12-07 13:41:51,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:41:51" (2/3) ... [2019-12-07 13:41:51,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@396cd227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:41:51, skipping insertion in model container [2019-12-07 13:41:51,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:41:51" (3/3) ... [2019-12-07 13:41:51,458 INFO L109 eAbstractionObserver]: Analyzing ICFG s3if.c [2019-12-07 13:41:51,465 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 13:41:51,468 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 13:41:51,476 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 13:41:51,490 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 13:41:51,490 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 13:41:51,490 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 13:41:51,491 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 13:41:51,491 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 13:41:51,491 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 13:41:51,491 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 13:41:51,491 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 13:41:51,499 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-12-07 13:41:51,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 13:41:51,503 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:41:51,504 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:41:51,504 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:41:51,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:41:51,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1476218026, now seen corresponding path program 1 times [2019-12-07 13:41:51,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 13:41:51,516 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371802497] [2019-12-07 13:41:51,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2019-12-07 13:41:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:41:51,574 INFO L264 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2019-12-07 13:41:51,577 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:41:51,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:41:51,587 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:41:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:41:51,590 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371802497] [2019-12-07 13:41:51,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:41:51,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-12-07 13:41:51,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748883104] [2019-12-07 13:41:51,594 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 13:41:51,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 13:41:51,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 13:41:51,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 13:41:51,605 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-12-07 13:41:51,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:41:51,615 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2019-12-07 13:41:51,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 13:41:51,616 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-12-07 13:41:51,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:41:51,622 INFO L225 Difference]: With dead ends: 29 [2019-12-07 13:41:51,622 INFO L226 Difference]: Without dead ends: 13 [2019-12-07 13:41:51,624 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 13:41:51,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-12-07 13:41:51,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-12-07 13:41:51,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-12-07 13:41:51,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-12-07 13:41:51,645 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2019-12-07 13:41:51,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:41:51,646 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-12-07 13:41:51,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 13:41:51,646 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-12-07 13:41:51,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 13:41:51,646 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:41:51,646 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:41:51,847 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-12-07 13:41:51,847 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:41:51,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:41:51,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1304115419, now seen corresponding path program 1 times [2019-12-07 13:41:51,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 13:41:51,849 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359211812] [2019-12-07 13:41:51,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2019-12-07 13:41:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:41:51,921 INFO L264 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 13:41:51,922 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:41:51,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:41:51,945 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:41:51,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:41:51,954 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359211812] [2019-12-07 13:41:51,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:41:51,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-12-07 13:41:51,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638784007] [2019-12-07 13:41:51,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 13:41:51,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 13:41:51,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 13:41:51,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:41:51,956 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 4 states. [2019-12-07 13:41:52,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:41:52,077 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-12-07 13:41:52,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 13:41:52,078 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-12-07 13:41:52,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:41:52,078 INFO L225 Difference]: With dead ends: 23 [2019-12-07 13:41:52,078 INFO L226 Difference]: Without dead ends: 15 [2019-12-07 13:41:52,079 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:41:52,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-12-07 13:41:52,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-12-07 13:41:52,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 13:41:52,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-12-07 13:41:52,082 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2019-12-07 13:41:52,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:41:52,082 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-12-07 13:41:52,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 13:41:52,082 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-12-07 13:41:52,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 13:41:52,083 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:41:52,083 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:41:52,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-12-07 13:41:52,284 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:41:52,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:41:52,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1358761923, now seen corresponding path program 1 times [2019-12-07 13:41:52,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 13:41:52,286 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359907030] [2019-12-07 13:41:52,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2019-12-07 13:41:52,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:41:52,350 INFO L264 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 13:41:52,351 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:41:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:41:52,402 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:41:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:41:52,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359907030] [2019-12-07 13:41:52,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:41:52,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-12-07 13:41:52,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223860797] [2019-12-07 13:41:52,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 13:41:52,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 13:41:52,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 13:41:52,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-12-07 13:41:52,475 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 10 states. [2019-12-07 13:41:52,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:41:52,877 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2019-12-07 13:41:52,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 13:41:52,878 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2019-12-07 13:41:52,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:41:52,879 INFO L225 Difference]: With dead ends: 34 [2019-12-07 13:41:52,879 INFO L226 Difference]: Without dead ends: 27 [2019-12-07 13:41:52,879 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-12-07 13:41:52,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-12-07 13:41:52,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2019-12-07 13:41:52,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 13:41:52,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-12-07 13:41:52,883 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 11 [2019-12-07 13:41:52,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:41:52,883 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-12-07 13:41:52,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 13:41:52,884 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-12-07 13:41:52,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 13:41:52,884 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:41:52,884 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:41:53,085 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2019-12-07 13:41:53,085 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:41:53,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:41:53,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1565637502, now seen corresponding path program 1 times [2019-12-07 13:41:53,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 13:41:53,087 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1871722952] [2019-12-07 13:41:53,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2019-12-07 13:41:53,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:41:53,173 INFO L264 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-07 13:41:53,174 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:41:53,210 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-12-07 13:41:53,210 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:41:53,231 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:41:53,236 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 13:41:53,247 INFO L343 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2019-12-07 13:41:53,248 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2019-12-07 13:41:53,248 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 13:41:53,265 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:41:53,266 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:41:53,266 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:35 [2019-12-07 13:41:53,298 INFO L343 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2019-12-07 13:41:53,298 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2019-12-07 13:41:53,299 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:41:53,320 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:41:53,320 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:41:53,321 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:46 [2019-12-07 13:41:53,510 INFO L343 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2019-12-07 13:41:53,510 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 49 [2019-12-07 13:41:53,512 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:41:53,533 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:41:53,534 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 13:41:53,535 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:64 [2019-12-07 13:41:53,579 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:41:53,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:41:53,610 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:41:56,800 WARN L192 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 36 [2019-12-07 13:41:56,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:41:56,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1871722952] [2019-12-07 13:41:56,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:41:56,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-12-07 13:41:56,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361703670] [2019-12-07 13:41:56,812 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 13:41:56,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 13:41:56,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 13:41:56,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-12-07 13:41:56,813 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 16 states. [2019-12-07 13:42:00,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:42:00,076 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-12-07 13:42:00,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 13:42:00,077 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2019-12-07 13:42:00,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:42:00,078 INFO L225 Difference]: With dead ends: 33 [2019-12-07 13:42:00,078 INFO L226 Difference]: Without dead ends: 27 [2019-12-07 13:42:00,078 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2019-12-07 13:42:00,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-12-07 13:42:00,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2019-12-07 13:42:00,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 13:42:00,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-12-07 13:42:00,082 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2019-12-07 13:42:00,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:42:00,082 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-12-07 13:42:00,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 13:42:00,082 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-12-07 13:42:00,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 13:42:00,082 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:42:00,083 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:42:00,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2019-12-07 13:42:00,284 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:42:00,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:42:00,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1508379200, now seen corresponding path program 1 times [2019-12-07 13:42:00,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 13:42:00,285 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1116366589] [2019-12-07 13:42:00,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2019-12-07 13:42:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:42:00,352 INFO L264 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 13:42:00,353 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:42:00,359 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-12-07 13:42:00,359 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:42:00,361 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:42:00,361 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:42:00,361 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-12-07 13:42:00,377 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-12-07 13:42:00,377 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:42:00,378 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:42:00,379 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:42:00,379 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:5 [2019-12-07 13:42:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:42:00,385 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:42:00,402 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2019-12-07 13:42:00,405 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2019-12-07 13:42:00,405 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 13:42:00,407 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:42:00,407 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:42:00,409 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:42:00,409 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:42:00,409 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:16, output treesize:7 [2019-12-07 13:42:00,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:42:00,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1116366589] [2019-12-07 13:42:00,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:42:00,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2019-12-07 13:42:00,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876791283] [2019-12-07 13:42:00,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 13:42:00,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 13:42:00,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 13:42:00,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-07 13:42:00,421 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 8 states. [2019-12-07 13:42:01,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:42:01,209 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-12-07 13:42:01,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 13:42:01,219 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-12-07 13:42:01,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:42:01,219 INFO L225 Difference]: With dead ends: 31 [2019-12-07 13:42:01,220 INFO L226 Difference]: Without dead ends: 19 [2019-12-07 13:42:01,220 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-07 13:42:01,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-12-07 13:42:01,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-12-07 13:42:01,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-12-07 13:42:01,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-12-07 13:42:01,222 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2019-12-07 13:42:01,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:42:01,223 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-12-07 13:42:01,223 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 13:42:01,223 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-12-07 13:42:01,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 13:42:01,223 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:42:01,223 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:42:01,424 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2019-12-07 13:42:01,425 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:42:01,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:42:01,425 INFO L82 PathProgramCache]: Analyzing trace with hash -472130976, now seen corresponding path program 2 times [2019-12-07 13:42:01,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 13:42:01,426 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746846083] [2019-12-07 13:42:01,427 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2019-12-07 13:42:01,468 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:42:01,469 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:42:01,471 INFO L264 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 13:42:01,472 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:42:01,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:42:01,565 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:42:01,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:42:01,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746846083] [2019-12-07 13:42:01,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:42:01,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-12-07 13:42:01,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523835608] [2019-12-07 13:42:01,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 13:42:01,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 13:42:01,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 13:42:01,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-07 13:42:01,766 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 16 states. [2019-12-07 13:42:02,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:42:02,286 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2019-12-07 13:42:02,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 13:42:02,287 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2019-12-07 13:42:02,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:42:02,287 INFO L225 Difference]: With dead ends: 42 [2019-12-07 13:42:02,288 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 13:42:02,288 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2019-12-07 13:42:02,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 13:42:02,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2019-12-07 13:42:02,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 13:42:02,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-12-07 13:42:02,293 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 16 [2019-12-07 13:42:02,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:42:02,294 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-12-07 13:42:02,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 13:42:02,294 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-12-07 13:42:02,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-07 13:42:02,294 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:42:02,294 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:42:02,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2019-12-07 13:42:02,495 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:42:02,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:42:02,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1991965825, now seen corresponding path program 3 times [2019-12-07 13:42:02,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 13:42:02,497 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793841989] [2019-12-07 13:42:02,497 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2019-12-07 13:42:02,598 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 13:42:02,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:42:02,602 WARN L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-07 13:42:02,603 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:42:02,612 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-12-07 13:42:02,612 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:42:02,631 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:42:02,635 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:42:02,636 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 13:42:02,637 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2019-12-07 13:42:02,637 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 13:42:02,654 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:42:02,655 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:42:02,655 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:45, output treesize:41 [2019-12-07 13:42:02,683 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:42:02,684 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2019-12-07 13:42:02,685 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:42:02,724 INFO L614 ElimStorePlain]: treesize reduction 4, result has 92.3 percent of original size [2019-12-07 13:42:02,724 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:42:02,724 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:48 [2019-12-07 13:42:02,782 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 13:42:02,783 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:42:02,804 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:42:02,804 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 76 [2019-12-07 13:42:02,805 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:42:02,855 INFO L614 ElimStorePlain]: treesize reduction 32, result has 63.6 percent of original size [2019-12-07 13:42:02,855 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:42:02,855 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:56 [2019-12-07 13:42:03,103 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:42:03,104 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:42:03,104 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 13:42:03,105 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 13:42:03,441 WARN L192 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2019-12-07 13:42:03,441 INFO L343 Elim1Store]: treesize reduction 32, result has 74.8 percent of original size [2019-12-07 13:42:03,442 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 114 treesize of output 144 [2019-12-07 13:42:03,444 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:42:03,498 INFO L614 ElimStorePlain]: treesize reduction 89, result has 45.7 percent of original size [2019-12-07 13:42:03,498 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:42:03,498 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:130, output treesize:75 [2019-12-07 13:42:03,616 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:42:03,617 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 13:42:03,673 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:42:03,674 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 109 treesize of output 137 [2019-12-07 13:42:03,675 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:42:03,718 INFO L614 ElimStorePlain]: treesize reduction 120, result has 43.7 percent of original size [2019-12-07 13:42:03,719 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:42:03,719 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:119, output treesize:93 [2019-12-07 13:42:03,787 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:42:03,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:42:03,833 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:42:06,255 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2019-12-07 13:42:06,901 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2019-12-07 13:42:08,183 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2019-12-07 13:42:08,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:42:08,199 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793841989] [2019-12-07 13:42:08,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:42:08,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2019-12-07 13:42:08,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954840053] [2019-12-07 13:42:08,200 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-07 13:42:08,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 13:42:08,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-07 13:42:08,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2019-12-07 13:42:08,201 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 26 states. [2019-12-07 13:42:13,170 WARN L192 SmtUtils]: Spent 3.08 s on a formula simplification. DAG size of input: 145 DAG size of output: 81 [2019-12-07 13:42:16,801 WARN L192 SmtUtils]: Spent 2.67 s on a formula simplification that was a NOOP. DAG size: 119 [2019-12-07 13:42:19,428 WARN L192 SmtUtils]: Spent 2.21 s on a formula simplification that was a NOOP. DAG size: 85 [2019-12-07 13:42:23,847 WARN L192 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 150 DAG size of output: 61 [2019-12-07 13:42:31,264 WARN L192 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 154 DAG size of output: 65 [2019-12-07 13:42:31,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:42:31,315 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2019-12-07 13:42:31,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-07 13:42:31,318 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 19 [2019-12-07 13:42:31,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:42:31,318 INFO L225 Difference]: With dead ends: 37 [2019-12-07 13:42:31,318 INFO L226 Difference]: Without dead ends: 31 [2019-12-07 13:42:31,319 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=157, Invalid=834, Unknown=1, NotChecked=0, Total=992 [2019-12-07 13:42:31,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-12-07 13:42:31,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-12-07 13:42:31,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 13:42:31,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-12-07 13:42:31,323 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 19 [2019-12-07 13:42:31,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:42:31,323 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-12-07 13:42:31,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-07 13:42:31,323 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-12-07 13:42:31,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-07 13:42:31,323 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:42:31,324 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:42:31,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2019-12-07 13:42:31,524 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:42:31,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:42:31,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1934707523, now seen corresponding path program 1 times [2019-12-07 13:42:31,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 13:42:31,526 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341931400] [2019-12-07 13:42:31,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2019-12-07 13:42:31,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:42:31,663 INFO L264 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 13:42:31,664 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:42:31,668 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-12-07 13:42:31,669 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:42:31,675 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:42:31,675 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:42:31,676 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-12-07 13:42:31,696 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-12-07 13:42:31,696 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:42:31,704 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:42:31,704 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:42:31,705 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-12-07 13:42:31,745 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:42:31,765 INFO L343 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2019-12-07 13:42:31,765 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 54 [2019-12-07 13:42:31,767 INFO L534 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 13:42:31,808 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:42:31,808 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-12-07 13:42:31,809 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:86, output treesize:66 [2019-12-07 13:42:35,906 WARN L192 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 37 [2019-12-07 13:42:37,989 WARN L192 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 37 [2019-12-07 13:42:37,996 INFO L343 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2019-12-07 13:42:37,997 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 27 [2019-12-07 13:42:37,997 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:42:38,002 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:42:38,002 INFO L534 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:42:38,002 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:57, output treesize:5 [2019-12-07 13:42:38,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:42:38,024 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:42:38,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341931400] [2019-12-07 13:42:38,440 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2019-12-07 13:42:38,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1240078248] [2019-12-07 13:42:38,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 13:42:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:42:38,648 INFO L264 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-07 13:42:38,649 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:42:38,650 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@1e249e36 [2019-12-07 13:42:38,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180182395] [2019-12-07 13:42:38,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_00471ba7-cf18-4606-9a75-8e954072d20f/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:42:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:42:38,740 INFO L264 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 13:42:38,741 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:42:38,742 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@1e249e36 [2019-12-07 13:42:38,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:42:38,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2019-12-07 13:42:38,743 ERROR L206 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2019-12-07 13:42:38,743 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 13:42:39,346 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3,10 cvc4 --incremental --print-success --lang smt --rewrite-divk,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:42:39,368 WARN L229 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2019-12-07 13:42:39,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 01:42:39 BoogieIcfgContainer [2019-12-07 13:42:39,369 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 13:42:39,369 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 13:42:39,370 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 13:42:39,370 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 13:42:39,370 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:41:51" (3/4) ... [2019-12-07 13:42:39,375 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 13:42:39,375 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 13:42:39,376 INFO L168 Benchmark]: Toolchain (without parser) took 48387.73 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 281.0 MB). Free memory was 953.7 MB in the beginning and 1.2 GB in the end (delta: -293.3 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:42:39,376 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:42:39,376 INFO L168 Benchmark]: CACSL2BoogieTranslator took 162.65 ms. Allocated memory is still 1.0 GB. Free memory was 953.7 MB in the beginning and 941.6 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2019-12-07 13:42:39,376 INFO L168 Benchmark]: Boogie Procedure Inliner took 65.83 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.3 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -160.7 MB). Peak memory consumption was 10.1 MB. Max. memory is 11.5 GB. [2019-12-07 13:42:39,377 INFO L168 Benchmark]: Boogie Preprocessor took 19.22 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:42:39,377 INFO L168 Benchmark]: RCFGBuilder took 216.84 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. [2019-12-07 13:42:39,377 INFO L168 Benchmark]: TraceAbstraction took 47914.50 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 166.7 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -163.9 MB). Peak memory consumption was 2.8 MB. Max. memory is 11.5 GB. [2019-12-07 13:42:39,377 INFO L168 Benchmark]: Witness Printer took 5.37 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:42:39,379 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 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 162.65 ms. Allocated memory is still 1.0 GB. Free memory was 953.7 MB in the beginning and 941.6 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 65.83 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.3 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -160.7 MB). Peak memory consumption was 10.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.22 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 216.84 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 47914.50 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 166.7 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -163.9 MB). Peak memory consumption was 2.8 MB. Max. memory is 11.5 GB. * Witness Printer took 5.37 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 10]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L14] int N; [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] long long sum[1]; [L24] int *a = malloc(sizeof(int)*N); [L26] sum[0] = 0 [L27] i=0 [L27] COND TRUE i