./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-properties/list-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b5699aa 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_3df46b0c-b909-416d-9218-5c8b7f6fa0a7/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_3df46b0c-b909-416d-9218-5c8b7f6fa0a7/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3df46b0c-b909-416d-9218-5c8b7f6fa0a7/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3df46b0c-b909-416d-9218-5c8b7f6fa0a7/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/list-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_3df46b0c-b909-416d-9218-5c8b7f6fa0a7/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3df46b0c-b909-416d-9218-5c8b7f6fa0a7/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 283704c20cde057c38dc133107a27c4d033fb1ba ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-25 08:58:34,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:58:34,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:58:34,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:58:34,362 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:58:34,363 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:58:34,364 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:58:34,366 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:58:34,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:58:34,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:58:34,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:58:34,370 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:58:34,370 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:58:34,371 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:58:34,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:58:34,373 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:58:34,374 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:58:34,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:58:34,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:58:34,379 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:58:34,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:58:34,381 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:58:34,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:58:34,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:58:34,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:58:34,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:58:34,386 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:58:34,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:58:34,387 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:58:34,388 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:58:34,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:58:34,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:58:34,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:58:34,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:58:34,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:58:34,391 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:58:34,392 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:58:34,392 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:58:34,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:58:34,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:58:34,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:58:34,394 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3df46b0c-b909-416d-9218-5c8b7f6fa0a7/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-25 08:58:34,408 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:58:34,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:58:34,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:58:34,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:58:34,414 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:58:34,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:58:34,414 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:58:34,414 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-25 08:58:34,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:58:34,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:58:34,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:58:34,417 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-25 08:58:34,417 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-25 08:58:34,417 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-25 08:58:34,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:58:34,417 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-25 08:58:34,418 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-25 08:58:34,418 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-25 08:58:34,418 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:58:34,418 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:58:34,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:58:34,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:58:34,419 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:58:34,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:58:34,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:58:34,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:58:34,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:58:34,420 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-25 08:58:34,420 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-25 08:58:34,421 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-25 08:58:34,421 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_3df46b0c-b909-416d-9218-5c8b7f6fa0a7/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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> 283704c20cde057c38dc133107a27c4d033fb1ba [2019-11-25 08:58:34,570 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:58:34,585 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:58:34,587 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:58:34,594 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:58:34,595 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:58:34,596 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3df46b0c-b909-416d-9218-5c8b7f6fa0a7/bin/uautomizer/../../sv-benchmarks/c/list-properties/list-1.i [2019-11-25 08:58:34,661 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3df46b0c-b909-416d-9218-5c8b7f6fa0a7/bin/uautomizer/data/edce5cb08/9390fe4c2aaf4985b5e506378cd3b2e7/FLAGd7d377849 [2019-11-25 08:58:35,083 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:58:35,084 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3df46b0c-b909-416d-9218-5c8b7f6fa0a7/sv-benchmarks/c/list-properties/list-1.i [2019-11-25 08:58:35,096 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3df46b0c-b909-416d-9218-5c8b7f6fa0a7/bin/uautomizer/data/edce5cb08/9390fe4c2aaf4985b5e506378cd3b2e7/FLAGd7d377849 [2019-11-25 08:58:35,105 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3df46b0c-b909-416d-9218-5c8b7f6fa0a7/bin/uautomizer/data/edce5cb08/9390fe4c2aaf4985b5e506378cd3b2e7 [2019-11-25 08:58:35,107 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:58:35,108 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-25 08:58:35,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:58:35,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:58:35,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:58:35,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:58:35" (1/1) ... [2019-11-25 08:58:35,115 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14868710 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:35, skipping insertion in model container [2019-11-25 08:58:35,115 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:58:35" (1/1) ... [2019-11-25 08:58:35,122 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:58:35,155 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:58:35,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:58:35,584 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:58:35,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:58:35,670 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:58:35,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:35 WrapperNode [2019-11-25 08:58:35,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:58:35,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:58:35,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:58:35,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:58:35,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:35" (1/1) ... [2019-11-25 08:58:35,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:35" (1/1) ... [2019-11-25 08:58:35,699 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:35" (1/1) ... [2019-11-25 08:58:35,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:35" (1/1) ... [2019-11-25 08:58:35,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:35" (1/1) ... [2019-11-25 08:58:35,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:35" (1/1) ... [2019-11-25 08:58:35,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:35" (1/1) ... [2019-11-25 08:58:35,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:58:35,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:58:35,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:58:35,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:58:35,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3df46b0c-b909-416d-9218-5c8b7f6fa0a7/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:58:35,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-25 08:58:35,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:58:35,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2019-11-25 08:58:35,801 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-25 08:58:35,801 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-25 08:58:35,801 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-25 08:58:35,802 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-25 08:58:35,803 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-25 08:58:35,803 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-25 08:58:35,803 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-25 08:58:35,804 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-25 08:58:35,804 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-25 08:58:35,804 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-25 08:58:35,804 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-25 08:58:35,805 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-25 08:58:35,805 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-25 08:58:35,806 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-25 08:58:35,806 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-25 08:58:35,806 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-25 08:58:35,806 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-25 08:58:35,806 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-25 08:58:35,807 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-25 08:58:35,807 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-25 08:58:35,807 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-25 08:58:35,808 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-25 08:58:35,808 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-25 08:58:35,808 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-25 08:58:35,808 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-25 08:58:35,809 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-25 08:58:35,809 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-25 08:58:35,809 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-25 08:58:35,809 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-25 08:58:35,809 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-25 08:58:35,810 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-25 08:58:35,810 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-25 08:58:35,810 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-25 08:58:35,810 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-25 08:58:35,810 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-25 08:58:35,810 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-25 08:58:35,811 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-25 08:58:35,811 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-25 08:58:35,811 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-25 08:58:35,811 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-25 08:58:35,811 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-25 08:58:35,811 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-25 08:58:35,812 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-25 08:58:35,812 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-25 08:58:35,812 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-25 08:58:35,812 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-25 08:58:35,812 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-25 08:58:35,812 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-25 08:58:35,813 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-25 08:58:35,813 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-25 08:58:35,813 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-25 08:58:35,813 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-25 08:58:35,813 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-25 08:58:35,814 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-25 08:58:35,814 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-25 08:58:35,814 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-25 08:58:35,814 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-25 08:58:35,814 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-25 08:58:35,815 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-25 08:58:35,815 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-25 08:58:35,815 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-25 08:58:35,815 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-25 08:58:35,815 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-25 08:58:35,816 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-25 08:58:35,816 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-25 08:58:35,816 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-25 08:58:35,816 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-25 08:58:35,817 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-25 08:58:35,817 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-25 08:58:35,818 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-25 08:58:35,819 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-25 08:58:35,819 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-25 08:58:35,819 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-25 08:58:35,819 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-25 08:58:35,819 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-25 08:58:35,819 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-25 08:58:35,820 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-25 08:58:35,820 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-25 08:58:35,820 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-25 08:58:35,821 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-25 08:58:35,821 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-25 08:58:35,821 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-25 08:58:35,821 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-25 08:58:35,821 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-25 08:58:35,821 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-25 08:58:35,822 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-25 08:58:35,822 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-25 08:58:35,822 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-25 08:58:35,822 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-25 08:58:35,822 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-25 08:58:35,822 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-25 08:58:35,823 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-25 08:58:35,823 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-25 08:58:35,823 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-25 08:58:35,823 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-25 08:58:35,823 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-25 08:58:35,823 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-25 08:58:35,824 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-25 08:58:35,824 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-25 08:58:35,824 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-25 08:58:35,824 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-25 08:58:35,824 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-25 08:58:35,824 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-25 08:58:35,825 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-25 08:58:35,825 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-25 08:58:35,825 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-25 08:58:35,825 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-25 08:58:35,825 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-25 08:58:35,825 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-25 08:58:35,826 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-25 08:58:35,826 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-25 08:58:35,826 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-25 08:58:35,826 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-25 08:58:35,827 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-25 08:58:35,827 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-25 08:58:35,827 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-25 08:58:35,828 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-25 08:58:35,828 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-25 08:58:35,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-25 08:58:35,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-25 08:58:35,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-25 08:58:35,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-25 08:58:35,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-25 08:58:35,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-25 08:58:35,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:58:35,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2019-11-25 08:58:35,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-25 08:58:36,216 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-25 08:58:36,509 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:58:36,510 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-25 08:58:36,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:58:36 BoogieIcfgContainer [2019-11-25 08:58:36,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:58:36,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:58:36,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:58:36,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:58:36,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:58:35" (1/3) ... [2019-11-25 08:58:36,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4178d97b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:58:36, skipping insertion in model container [2019-11-25 08:58:36,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:35" (2/3) ... [2019-11-25 08:58:36,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4178d97b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:58:36, skipping insertion in model container [2019-11-25 08:58:36,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:58:36" (3/3) ... [2019-11-25 08:58:36,517 INFO L109 eAbstractionObserver]: Analyzing ICFG list-1.i [2019-11-25 08:58:36,526 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:58:36,532 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 25 error locations. [2019-11-25 08:58:36,542 INFO L249 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2019-11-25 08:58:36,558 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:58:36,559 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-25 08:58:36,559 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:58:36,559 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:58:36,559 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:58:36,559 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:58:36,559 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:58:36,559 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:58:36,577 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2019-11-25 08:58:36,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-25 08:58:36,588 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:58:36,588 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:58:36,589 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-25 08:58:36,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:58:36,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1586773019, now seen corresponding path program 1 times [2019-11-25 08:58:36,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:58:36,608 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [180909686] [2019-11-25 08:58:36,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3df46b0c-b909-416d-9218-5c8b7f6fa0a7/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:58:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:36,818 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:58:36,822 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:58:36,881 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2019-11-25 08:58:36,881 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:36,891 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:36,892 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:58:36,892 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-25 08:58:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:58:36,907 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:58:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:58:36,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [180909686] [2019-11-25 08:58:36,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:58:36,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-25 08:58:36,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541719071] [2019-11-25 08:58:36,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-25 08:58:36,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:58:36,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-25 08:58:36,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:58:36,944 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 4 states. [2019-11-25 08:58:37,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:58:37,248 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2019-11-25 08:58:37,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-25 08:58:37,250 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-11-25 08:58:37,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:58:37,257 INFO L225 Difference]: With dead ends: 75 [2019-11-25 08:58:37,258 INFO L226 Difference]: Without dead ends: 66 [2019-11-25 08:58:37,259 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:58:37,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-25 08:58:37,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2019-11-25 08:58:37,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-25 08:58:37,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2019-11-25 08:58:37,294 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 10 [2019-11-25 08:58:37,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:58:37,295 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2019-11-25 08:58:37,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-25 08:58:37,295 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2019-11-25 08:58:37,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-25 08:58:37,296 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:58:37,296 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:58:37,499 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:58:37,499 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-25 08:58:37,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:58:37,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1586773020, now seen corresponding path program 1 times [2019-11-25 08:58:37,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:58:37,500 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1936288814] [2019-11-25 08:58:37,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3df46b0c-b909-416d-9218-5c8b7f6fa0a7/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:58:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:37,666 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:58:37,667 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:58:37,682 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2019-11-25 08:58:37,682 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:37,689 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:37,690 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:58:37,690 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-25 08:58:37,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:58:37,716 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:58:37,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:58:37,823 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1936288814] [2019-11-25 08:58:37,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:58:37,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-25 08:58:37,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087712296] [2019-11-25 08:58:37,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-25 08:58:37,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:58:37,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:58:37,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:58:37,825 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 6 states. [2019-11-25 08:58:38,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:58:38,261 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2019-11-25 08:58:38,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:58:38,262 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-25 08:58:38,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:58:38,263 INFO L225 Difference]: With dead ends: 83 [2019-11-25 08:58:38,263 INFO L226 Difference]: Without dead ends: 83 [2019-11-25 08:58:38,264 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:58:38,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-25 08:58:38,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2019-11-25 08:58:38,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-25 08:58:38,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2019-11-25 08:58:38,272 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 10 [2019-11-25 08:58:38,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:58:38,273 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2019-11-25 08:58:38,273 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-25 08:58:38,273 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2019-11-25 08:58:38,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-25 08:58:38,274 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:58:38,275 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:58:38,477 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:58:38,478 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-25 08:58:38,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:58:38,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1904496915, now seen corresponding path program 1 times [2019-11-25 08:58:38,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:58:38,479 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [498462202] [2019-11-25 08:58:38,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3df46b0c-b909-416d-9218-5c8b7f6fa0a7/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:58:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:38,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:58:38,658 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:58:38,684 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-25 08:58:38,685 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:38,689 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:38,690 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:58:38,690 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-25 08:58:38,722 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 17 treesize of output 9 [2019-11-25 08:58:38,723 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:38,733 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:38,734 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:58:38,734 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:5 [2019-11-25 08:58:38,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:58:38,746 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:58:38,807 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 12 [2019-11-25 08:58:38,807 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-25 08:58:38,818 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:38,818 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-25 08:58:38,818 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:7 [2019-11-25 08:58:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:58:38,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [498462202] [2019-11-25 08:58:38,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:58:38,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2019-11-25 08:58:38,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626077883] [2019-11-25 08:58:38,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-25 08:58:38,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:58:38,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-25 08:58:38,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:58:38,853 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand 11 states. [2019-11-25 08:58:39,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:58:39,624 INFO L93 Difference]: Finished difference Result 141 states and 148 transitions. [2019-11-25 08:58:39,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-25 08:58:39,625 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2019-11-25 08:58:39,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:58:39,627 INFO L225 Difference]: With dead ends: 141 [2019-11-25 08:58:39,627 INFO L226 Difference]: Without dead ends: 141 [2019-11-25 08:58:39,628 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-11-25 08:58:39,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-11-25 08:58:39,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 79. [2019-11-25 08:58:39,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-25 08:58:39,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2019-11-25 08:58:39,647 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 17 [2019-11-25 08:58:39,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:58:39,647 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2019-11-25 08:58:39,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-25 08:58:39,648 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2019-11-25 08:58:39,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-25 08:58:39,649 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:58:39,649 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:58:39,859 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:58:39,859 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-25 08:58:39,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:58:39,859 INFO L82 PathProgramCache]: Analyzing trace with hash 639476165, now seen corresponding path program 1 times [2019-11-25 08:58:39,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:58:39,860 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1634949813] [2019-11-25 08:58:39,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3df46b0c-b909-416d-9218-5c8b7f6fa0a7/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:58:39,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:39,999 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:58:40,001 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:58:40,038 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:40,038 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2019-11-25 08:58:40,039 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:40,059 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-25 08:58:40,059 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:58:40,059 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2019-11-25 08:58:40,084 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 13 treesize of output 9 [2019-11-25 08:58:40,084 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:40,100 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:40,101 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:58:40,101 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:17 [2019-11-25 08:58:40,122 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 21 treesize of output 9 [2019-11-25 08:58:40,122 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:40,130 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:40,130 INFO L496 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. [2019-11-25 08:58:40,130 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:11 [2019-11-25 08:58:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:58:40,152 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:58:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:58:40,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1634949813] [2019-11-25 08:58:40,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:58:40,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-11-25 08:58:40,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893285463] [2019-11-25 08:58:40,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-25 08:58:40,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:58:40,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-25 08:58:40,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:58:40,186 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 8 states. [2019-11-25 08:58:40,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:58:40,743 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2019-11-25 08:58:40,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:58:40,744 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-11-25 08:58:40,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:58:40,745 INFO L225 Difference]: With dead ends: 101 [2019-11-25 08:58:40,745 INFO L226 Difference]: Without dead ends: 101 [2019-11-25 08:58:40,746 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:58:40,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-25 08:58:40,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 81. [2019-11-25 08:58:40,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-25 08:58:40,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2019-11-25 08:58:40,753 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 17 [2019-11-25 08:58:40,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:58:40,753 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2019-11-25 08:58:40,753 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-25 08:58:40,753 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2019-11-25 08:58:40,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-25 08:58:40,754 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:58:40,754 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:58:40,957 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:58:40,958 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-25 08:58:40,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:58:40,958 INFO L82 PathProgramCache]: Analyzing trace with hash 639476166, now seen corresponding path program 1 times [2019-11-25 08:58:40,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:58:40,958 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [607986132] [2019-11-25 08:58:40,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3df46b0c-b909-416d-9218-5c8b7f6fa0a7/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:58:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:41,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-25 08:58:41,143 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:58:41,159 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2019-11-25 08:58:41,159 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:41,172 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:41,172 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:58:41,173 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-25 08:58:41,191 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 13 treesize of output 9 [2019-11-25 08:58:41,191 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:41,202 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:41,206 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 13 treesize of output 9 [2019-11-25 08:58:41,206 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:41,215 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:41,215 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:58:41,216 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:23 [2019-11-25 08:58:41,257 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 23 treesize of output 11 [2019-11-25 08:58:41,257 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:41,274 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:41,282 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 19 treesize of output 7 [2019-11-25 08:58:41,283 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:41,289 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:41,289 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:58:41,289 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:11 [2019-11-25 08:58:41,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:58:41,320 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:58:41,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:58:41,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [607986132] [2019-11-25 08:58:41,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:58:41,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-25 08:58:41,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552743006] [2019-11-25 08:58:41,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-25 08:58:41,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:58:41,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-25 08:58:41,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:58:41,519 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 10 states. [2019-11-25 08:58:42,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:58:42,480 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2019-11-25 08:58:42,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-25 08:58:42,481 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-11-25 08:58:42,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:58:42,482 INFO L225 Difference]: With dead ends: 103 [2019-11-25 08:58:42,482 INFO L226 Difference]: Without dead ends: 103 [2019-11-25 08:58:42,483 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-11-25 08:58:42,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-25 08:58:42,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 77. [2019-11-25 08:58:42,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-25 08:58:42,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2019-11-25 08:58:42,489 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 17 [2019-11-25 08:58:42,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:58:42,489 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2019-11-25 08:58:42,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-25 08:58:42,490 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2019-11-25 08:58:42,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-25 08:58:42,490 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:58:42,490 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:58:42,693 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:58:42,693 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-25 08:58:42,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:58:42,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1771797442, now seen corresponding path program 1 times [2019-11-25 08:58:42,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:58:42,694 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1733527831] [2019-11-25 08:58:42,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3df46b0c-b909-416d-9218-5c8b7f6fa0a7/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:58:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:42,827 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:58:42,828 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:58:42,845 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:42,845 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2019-11-25 08:58:42,846 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:42,859 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-25 08:58:42,859 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:58:42,859 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2019-11-25 08:58:42,896 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 13 treesize of output 9 [2019-11-25 08:58:42,896 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:42,906 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:42,906 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:58:42,907 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:17 [2019-11-25 08:58:42,930 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 21 treesize of output 9 [2019-11-25 08:58:42,930 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:42,935 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:42,935 INFO L496 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. [2019-11-25 08:58:42,936 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:13 [2019-11-25 08:58:42,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:58:42,948 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:58:42,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:58:42,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1733527831] [2019-11-25 08:58:42,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:58:42,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-11-25 08:58:42,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884942983] [2019-11-25 08:58:42,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-25 08:58:42,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:58:42,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-25 08:58:42,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:58:42,986 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand 8 states. [2019-11-25 08:58:43,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:58:43,358 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2019-11-25 08:58:43,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:58:43,359 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-11-25 08:58:43,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:58:43,359 INFO L225 Difference]: With dead ends: 95 [2019-11-25 08:58:43,359 INFO L226 Difference]: Without dead ends: 95 [2019-11-25 08:58:43,360 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:58:43,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-25 08:58:43,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 75. [2019-11-25 08:58:43,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-25 08:58:43,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2019-11-25 08:58:43,368 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 18 [2019-11-25 08:58:43,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:58:43,369 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2019-11-25 08:58:43,369 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-25 08:58:43,369 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2019-11-25 08:58:43,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-25 08:58:43,370 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:58:43,370 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:58:43,570 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:58:43,571 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-25 08:58:43,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:58:43,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1771797443, now seen corresponding path program 1 times [2019-11-25 08:58:43,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:58:43,572 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [834965036] [2019-11-25 08:58:43,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3df46b0c-b909-416d-9218-5c8b7f6fa0a7/bin/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:58:43,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:43,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-25 08:58:43,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:58:43,742 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2019-11-25 08:58:43,742 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:43,751 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:43,751 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:58:43,752 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-25 08:58:43,780 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 13 treesize of output 9 [2019-11-25 08:58:43,780 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:43,799 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:43,805 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 13 treesize of output 9 [2019-11-25 08:58:43,805 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:43,823 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:43,824 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:58:43,824 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:23 [2019-11-25 08:58:43,850 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 23 treesize of output 11 [2019-11-25 08:58:43,850 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:43,861 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:43,863 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 19 treesize of output 7 [2019-11-25 08:58:43,863 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:43,869 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:43,870 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:58:43,870 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:9 [2019-11-25 08:58:43,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:58:43,891 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:58:44,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:58:44,067 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [834965036] [2019-11-25 08:58:44,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:58:44,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-25 08:58:44,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720845474] [2019-11-25 08:58:44,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-25 08:58:44,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:58:44,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-25 08:58:44,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:58:44,068 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 10 states. [2019-11-25 08:58:44,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:58:44,959 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2019-11-25 08:58:44,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-25 08:58:44,960 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2019-11-25 08:58:44,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:58:44,961 INFO L225 Difference]: With dead ends: 93 [2019-11-25 08:58:44,961 INFO L226 Difference]: Without dead ends: 93 [2019-11-25 08:58:44,962 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-11-25 08:58:44,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-11-25 08:58:44,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2019-11-25 08:58:44,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-25 08:58:44,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2019-11-25 08:58:44,972 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 18 [2019-11-25 08:58:44,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:58:44,972 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2019-11-25 08:58:44,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-25 08:58:44,973 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2019-11-25 08:58:44,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-25 08:58:44,974 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:58:44,974 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:58:45,175 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:58:45,177 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-25 08:58:45,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:58:45,178 INFO L82 PathProgramCache]: Analyzing trace with hash -613044742, now seen corresponding path program 1 times [2019-11-25 08:58:45,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:58:45,178 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [707231444] [2019-11-25 08:58:45,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3df46b0c-b909-416d-9218-5c8b7f6fa0a7/bin/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:58:45,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:45,327 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:58:45,328 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:58:45,355 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-25 08:58:45,355 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:45,360 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:45,360 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:58:45,361 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-25 08:58:45,386 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 17 treesize of output 9 [2019-11-25 08:58:45,386 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:58:45,388 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:45,388 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:58:45,388 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:3 [2019-11-25 08:58:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:58:45,404 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:58:45,465 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 12 [2019-11-25 08:58:45,465 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-25 08:58:45,474 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:58:45,475 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-25 08:58:45,475 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:7 [2019-11-25 08:58:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:58:45,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [707231444] [2019-11-25 08:58:45,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:58:45,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2019-11-25 08:58:45,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617130138] [2019-11-25 08:58:45,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-25 08:58:45,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:58:45,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-25 08:58:45,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:58:45,504 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand 11 states. [2019-11-25 08:58:46,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:58:46,128 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2019-11-25 08:58:46,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-25 08:58:46,129 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2019-11-25 08:58:46,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:58:46,130 INFO L225 Difference]: With dead ends: 127 [2019-11-25 08:58:46,130 INFO L226 Difference]: Without dead ends: 127 [2019-11-25 08:58:46,130 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-11-25 08:58:46,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-25 08:58:46,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 81. [2019-11-25 08:58:46,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-25 08:58:46,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2019-11-25 08:58:46,135 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 19 [2019-11-25 08:58:46,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:58:46,136 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2019-11-25 08:58:46,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-25 08:58:46,136 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2019-11-25 08:58:46,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-25 08:58:46,137 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:58:46,137 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:58:46,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:58:46,338 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-25 08:58:46,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:58:46,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1826142898, now seen corresponding path program 1 times [2019-11-25 08:58:46,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:58:46,339 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1511378368] [2019-11-25 08:58:46,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3df46b0c-b909-416d-9218-5c8b7f6fa0a7/bin/uautomizer/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:58:46,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:58:46,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:58:46,639 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-25 08:58:46,639 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-25 08:58:46,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:58:46,849 WARN L417 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2019-11-25 08:58:46,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:58:46 BoogieIcfgContainer [2019-11-25 08:58:46,861 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:58:46,861 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:58:46,861 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:58:46,861 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:58:46,862 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:58:36" (3/4) ... [2019-11-25 08:58:46,864 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-25 08:58:46,864 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:58:46,865 INFO L168 Benchmark]: Toolchain (without parser) took 11756.87 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 232.8 MB). Free memory was 940.7 MB in the beginning and 955.1 MB in the end (delta: -14.4 MB). Peak memory consumption was 218.4 MB. Max. memory is 11.5 GB. [2019-11-25 08:58:46,865 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:58:46,866 INFO L168 Benchmark]: CACSL2BoogieTranslator took 561.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 208.1 MB). Free memory was 940.7 MB in the beginning and 1.2 GB in the end (delta: -244.5 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-11-25 08:58:46,866 INFO L168 Benchmark]: Boogie Preprocessor took 58.54 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-25 08:58:46,866 INFO L168 Benchmark]: RCFGBuilder took 781.11 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 54.6 MB). Peak memory consumption was 54.6 MB. Max. memory is 11.5 GB. [2019-11-25 08:58:46,867 INFO L168 Benchmark]: TraceAbstraction took 10349.22 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 24.6 MB). Free memory was 1.1 GB in the beginning and 955.1 MB in the end (delta: 164.8 MB). Peak memory consumption was 189.4 MB. Max. memory is 11.5 GB. [2019-11-25 08:58:46,867 INFO L168 Benchmark]: Witness Printer took 2.79 ms. Allocated memory is still 1.3 GB. Free memory is still 955.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:58:46,869 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 561.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 208.1 MB). Free memory was 940.7 MB in the beginning and 1.2 GB in the end (delta: -244.5 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 58.54 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 781.11 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 54.6 MB). Peak memory consumption was 54.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 10349.22 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 24.6 MB). Free memory was 1.1 GB in the beginning and 955.1 MB in the end (delta: 164.8 MB). Peak memory consumption was 189.4 MB. Max. memory is 11.5 GB. * Witness Printer took 2.79 ms. Allocated memory is still 1.3 GB. Free memory is still 955.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 520]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 520. Possible FailurePath: [L521] List a = (List) malloc(sizeof(struct node)); VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}] [L522] COND FALSE !(a == 0) VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}] [L523] List t; [L524] List p = a; VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}] [L525] COND FALSE !(__VERIFIER_nondet_int()) [L532] COND FALSE !(__VERIFIER_nondet_int()) [L539] p->h = 3 VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}] [L540] p = a VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}] [L541] EXPR p->h VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}, p->h=3] [L541] COND FALSE !(p->h == 1) [L543] EXPR p->h VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}, p->h=3] [L543] COND FALSE !(p->h == 2) [L545] EXPR p->h VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}, p->h=3] [L545] COND FALSE !(p->h != 3) [L547] return 0; VAL [\result=0, a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 92 locations, 25 error locations. Result: UNSAFE, OverallTime: 10.3s, OverallIterations: 9, TraceHistogramMax: 2, AutomataDifference: 4.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 318 SDtfs, 1022 SDslu, 1030 SDs, 0 SdLazy, 1419 SolverSat, 184 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 280 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 219 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 146 NumberOfCodeBlocks, 146 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 236 ConstructedInterpolants, 0 QuantifiedInterpolants, 18044 SizeOfPredicates, 64 NumberOfNonLiveVariables, 520 ConjunctsInSsa, 67 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 20/20 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...