./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_remove_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 678e0110 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_b20f43aa-4dc9-413f-acec-04652f4f39ad/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_b20f43aa-4dc9-413f-acec-04652f4f39ad/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b20f43aa-4dc9-413f-acec-04652f4f39ad/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b20f43aa-4dc9-413f-acec-04652f4f39ad/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_remove_all.i -s /tmp/vcloud-vcloud-master/worker/run_dir_b20f43aa-4dc9-413f-acec-04652f4f39ad/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b20f43aa-4dc9-413f-acec-04652f4f39ad/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 a3189d7d4e71631c5441bd903e5049703e07b8be ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: AssertionError: Alternating quantifiers not yet supported --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-19 22:29:41,078 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 22:29:41,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 22:29:41,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 22:29:41,096 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 22:29:41,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 22:29:41,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 22:29:41,108 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 22:29:41,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 22:29:41,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 22:29:41,118 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 22:29:41,119 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 22:29:41,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 22:29:41,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 22:29:41,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 22:29:41,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 22:29:41,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 22:29:41,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 22:29:41,129 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 22:29:41,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 22:29:41,137 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 22:29:41,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 22:29:41,142 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 22:29:41,143 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 22:29:41,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 22:29:41,146 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 22:29:41,146 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 22:29:41,147 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 22:29:41,148 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 22:29:41,149 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 22:29:41,149 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 22:29:41,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 22:29:41,151 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 22:29:41,152 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 22:29:41,153 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 22:29:41,153 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 22:29:41,154 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 22:29:41,154 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 22:29:41,154 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 22:29:41,155 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 22:29:41,156 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 22:29:41,157 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b20f43aa-4dc9-413f-acec-04652f4f39ad/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-19 22:29:41,174 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 22:29:41,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 22:29:41,175 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 22:29:41,176 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 22:29:41,176 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 22:29:41,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 22:29:41,177 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 22:29:41,177 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-19 22:29:41,177 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 22:29:41,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 22:29:41,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 22:29:41,178 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-19 22:29:41,178 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-19 22:29:41,178 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-19 22:29:41,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 22:29:41,179 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-19 22:29:41,179 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-19 22:29:41,179 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 22:29:41,179 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 22:29:41,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 22:29:41,180 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 22:29:41,180 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 22:29:41,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 22:29:41,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 22:29:41,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 22:29:41,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 22:29:41,181 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-19 22:29:41,181 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-19 22:29:41,182 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-19 22:29:41,182 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_b20f43aa-4dc9-413f-acec-04652f4f39ad/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 -> a3189d7d4e71631c5441bd903e5049703e07b8be [2019-11-19 22:29:41,327 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 22:29:41,337 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 22:29:41,341 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 22:29:41,342 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 22:29:41,342 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 22:29:41,343 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b20f43aa-4dc9-413f-acec-04652f4f39ad/bin/uautomizer/../../sv-benchmarks/c/list-simple/sll2n_remove_all.i [2019-11-19 22:29:41,406 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b20f43aa-4dc9-413f-acec-04652f4f39ad/bin/uautomizer/data/527d9550e/3139d5b774e0449e9bcf1c389d777902/FLAG6c104e65b [2019-11-19 22:29:41,915 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 22:29:41,917 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b20f43aa-4dc9-413f-acec-04652f4f39ad/sv-benchmarks/c/list-simple/sll2n_remove_all.i [2019-11-19 22:29:41,934 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b20f43aa-4dc9-413f-acec-04652f4f39ad/bin/uautomizer/data/527d9550e/3139d5b774e0449e9bcf1c389d777902/FLAG6c104e65b [2019-11-19 22:29:42,231 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b20f43aa-4dc9-413f-acec-04652f4f39ad/bin/uautomizer/data/527d9550e/3139d5b774e0449e9bcf1c389d777902 [2019-11-19 22:29:42,233 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 22:29:42,234 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-19 22:29:42,238 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 22:29:42,238 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 22:29:42,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 22:29:42,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:29:42" (1/1) ... [2019-11-19 22:29:42,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@219b07fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:29:42, skipping insertion in model container [2019-11-19 22:29:42,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:29:42" (1/1) ... [2019-11-19 22:29:42,250 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 22:29:42,297 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 22:29:42,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 22:29:42,674 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 22:29:42,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 22:29:42,793 INFO L192 MainTranslator]: Completed translation [2019-11-19 22:29:42,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:29:42 WrapperNode [2019-11-19 22:29:42,794 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 22:29:42,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 22:29:42,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 22:29:42,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 22:29:42,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:29:42" (1/1) ... [2019-11-19 22:29:42,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:29:42" (1/1) ... [2019-11-19 22:29:42,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:29:42" (1/1) ... [2019-11-19 22:29:42,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:29:42" (1/1) ... [2019-11-19 22:29:42,846 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:29:42" (1/1) ... [2019-11-19 22:29:42,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:29:42" (1/1) ... [2019-11-19 22:29:42,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:29:42" (1/1) ... [2019-11-19 22:29:42,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 22:29:42,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 22:29:42,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 22:29:42,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 22:29:42,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:29:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b20f43aa-4dc9-413f-acec-04652f4f39ad/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 [2019-11-19 22:29:42,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-19 22:29:42,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 22:29:42,926 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-19 22:29:42,927 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-19 22:29:42,927 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-19 22:29:42,927 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-11-19 22:29:42,928 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2019-11-19 22:29:42,929 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_remove_first [2019-11-19 22:29:42,929 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-19 22:29:42,930 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-19 22:29:42,930 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-19 22:29:42,930 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-19 22:29:42,931 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-19 22:29:42,931 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-19 22:29:42,931 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-19 22:29:42,932 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-19 22:29:42,932 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-19 22:29:42,932 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-19 22:29:42,933 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-19 22:29:42,933 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-19 22:29:42,934 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-19 22:29:42,934 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-19 22:29:42,934 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-19 22:29:42,934 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-19 22:29:42,936 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-19 22:29:42,937 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-19 22:29:42,937 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-19 22:29:42,937 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-19 22:29:42,937 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-19 22:29:42,938 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-19 22:29:42,938 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-19 22:29:42,938 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-19 22:29:42,938 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-19 22:29:42,938 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-19 22:29:42,938 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-19 22:29:42,939 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-19 22:29:42,939 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-19 22:29:42,939 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-19 22:29:42,939 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-19 22:29:42,939 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-19 22:29:42,940 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-19 22:29:42,940 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-19 22:29:42,940 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-19 22:29:42,940 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-19 22:29:42,940 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-19 22:29:42,940 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-19 22:29:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-19 22:29:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-19 22:29:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-19 22:29:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-19 22:29:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-19 22:29:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-19 22:29:42,942 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-19 22:29:42,942 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-19 22:29:42,942 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-19 22:29:42,942 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-19 22:29:42,942 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-19 22:29:42,943 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-19 22:29:42,943 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-19 22:29:42,943 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-19 22:29:42,943 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-19 22:29:42,944 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-19 22:29:42,944 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-19 22:29:42,944 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-19 22:29:42,944 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-19 22:29:42,944 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-19 22:29:42,944 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-19 22:29:42,946 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-19 22:29:42,947 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-19 22:29:42,947 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-19 22:29:42,947 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-19 22:29:42,948 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-19 22:29:42,948 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-19 22:29:42,949 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-19 22:29:42,950 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-19 22:29:42,950 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-19 22:29:42,950 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-19 22:29:42,950 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-19 22:29:42,950 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-19 22:29:42,951 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-19 22:29:42,951 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-19 22:29:42,952 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-19 22:29:42,952 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-19 22:29:42,952 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-19 22:29:42,952 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-19 22:29:42,953 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-19 22:29:42,953 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-19 22:29:42,953 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-19 22:29:42,953 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-19 22:29:42,953 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-19 22:29:42,953 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-19 22:29:42,954 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-19 22:29:42,954 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-19 22:29:42,954 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-19 22:29:42,954 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-19 22:29:42,954 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-19 22:29:42,954 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-19 22:29:42,955 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-19 22:29:42,955 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-19 22:29:42,955 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-19 22:29:42,955 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-19 22:29:42,955 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-19 22:29:42,955 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-19 22:29:42,956 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-19 22:29:42,956 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-19 22:29:42,956 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-19 22:29:42,956 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-19 22:29:42,956 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-19 22:29:42,957 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-19 22:29:42,957 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-19 22:29:42,957 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-19 22:29:42,957 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-19 22:29:42,957 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-19 22:29:42,957 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-19 22:29:42,958 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-19 22:29:42,958 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-19 22:29:42,958 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-11-19 22:29:42,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-19 22:29:42,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-19 22:29:42,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-19 22:29:42,960 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2019-11-19 22:29:42,961 INFO L130 BoogieDeclarations]: Found specification of procedure sll_remove_first [2019-11-19 22:29:42,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-19 22:29:42,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-19 22:29:42,961 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-19 22:29:42,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-19 22:29:42,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-19 22:29:42,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-19 22:29:42,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 22:29:42,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-19 22:29:43,248 INFO L689 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-19 22:29:43,668 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 22:29:43,669 INFO L285 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-19 22:29:43,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:29:43 BoogieIcfgContainer [2019-11-19 22:29:43,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 22:29:43,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 22:29:43,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 22:29:43,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 22:29:43,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 10:29:42" (1/3) ... [2019-11-19 22:29:43,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1479fd9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:29:43, skipping insertion in model container [2019-11-19 22:29:43,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:29:42" (2/3) ... [2019-11-19 22:29:43,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1479fd9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:29:43, skipping insertion in model container [2019-11-19 22:29:43,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:29:43" (3/3) ... [2019-11-19 22:29:43,677 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all.i [2019-11-19 22:29:43,686 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 22:29:43,691 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 20 error locations. [2019-11-19 22:29:43,700 INFO L249 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2019-11-19 22:29:43,719 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 22:29:43,719 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-19 22:29:43,719 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 22:29:43,719 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 22:29:43,719 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 22:29:43,720 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 22:29:43,720 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 22:29:43,720 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 22:29:43,738 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states. [2019-11-19 22:29:43,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-19 22:29:43,748 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:29:43,748 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:29:43,749 INFO L410 AbstractCegarLoop]: === Iteration 1 === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, sll_remove_firstErr1REQUIRES_VIOLATION, sll_remove_firstErr0REQUIRES_VIOLATION, sll_remove_firstErr5REQUIRES_VIOLATION, sll_remove_firstErr10REQUIRES_VIOLATION, sll_remove_firstErr4REQUIRES_VIOLATION, sll_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, sll_remove_firstErr9REQUIRES_VIOLATION, sll_remove_firstErr3REQUIRES_VIOLATION, sll_remove_firstErr6ASSERT_VIOLATIONMEMORY_FREE, sll_remove_firstErr7ASSERT_VIOLATIONMEMORY_FREE, sll_remove_firstErr2REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-19 22:29:43,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:29:43,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1645367829, now seen corresponding path program 1 times [2019-11-19 22:29:43,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:29:43,766 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [374704624] [2019-11-19 22:29:43,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b20f43aa-4dc9-413f-acec-04652f4f39ad/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 [2019-11-19 22:29:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:29:44,003 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 22:29:44,009 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:29:44,080 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 [2019-11-19 22:29:44,081 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:29:44,089 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:29:44,089 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:29:44,090 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-19 22:29:44,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:29:44,100 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:29:44,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:29:44,118 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [374704624] [2019-11-19 22:29:44,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:29:44,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-19 22:29:44,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270229469] [2019-11-19 22:29:44,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-19 22:29:44,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 22:29:44,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 22:29:44,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 22:29:44,143 INFO L87 Difference]: Start difference. First operand 69 states. Second operand 3 states. [2019-11-19 22:29:44,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:29:44,288 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2019-11-19 22:29:44,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 22:29:44,290 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-19 22:29:44,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:29:44,299 INFO L225 Difference]: With dead ends: 67 [2019-11-19 22:29:44,299 INFO L226 Difference]: Without dead ends: 60 [2019-11-19 22:29:44,301 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 22:29:44,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-19 22:29:44,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-11-19 22:29:44,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-19 22:29:44,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2019-11-19 22:29:44,349 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 13 [2019-11-19 22:29:44,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:29:44,349 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2019-11-19 22:29:44,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-19 22:29:44,349 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2019-11-19 22:29:44,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-19 22:29:44,350 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:29:44,350 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:29:44,554 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:29:44,554 INFO L410 AbstractCegarLoop]: === Iteration 2 === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, sll_remove_firstErr1REQUIRES_VIOLATION, sll_remove_firstErr0REQUIRES_VIOLATION, sll_remove_firstErr5REQUIRES_VIOLATION, sll_remove_firstErr10REQUIRES_VIOLATION, sll_remove_firstErr4REQUIRES_VIOLATION, sll_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, sll_remove_firstErr9REQUIRES_VIOLATION, sll_remove_firstErr3REQUIRES_VIOLATION, sll_remove_firstErr6ASSERT_VIOLATIONMEMORY_FREE, sll_remove_firstErr7ASSERT_VIOLATIONMEMORY_FREE, sll_remove_firstErr2REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-19 22:29:44,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:29:44,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1645367828, now seen corresponding path program 1 times [2019-11-19 22:29:44,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:29:44,555 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [155967279] [2019-11-19 22:29:44,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b20f43aa-4dc9-413f-acec-04652f4f39ad/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 [2019-11-19 22:29:44,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:29:44,755 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 22:29:44,757 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:29:44,776 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 [2019-11-19 22:29:44,777 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:29:44,785 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:29:44,785 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:29:44,786 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-19 22:29:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:29:44,801 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:29:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:29:44,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [155967279] [2019-11-19 22:29:44,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:29:44,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-19 22:29:44,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208294554] [2019-11-19 22:29:44,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 22:29:44,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 22:29:44,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 22:29:44,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 22:29:44,863 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 4 states. [2019-11-19 22:29:45,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:29:45,091 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2019-11-19 22:29:45,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 22:29:45,093 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-19 22:29:45,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:29:45,095 INFO L225 Difference]: With dead ends: 58 [2019-11-19 22:29:45,095 INFO L226 Difference]: Without dead ends: 58 [2019-11-19 22:29:45,096 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 22:29:45,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-19 22:29:45,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-11-19 22:29:45,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-19 22:29:45,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2019-11-19 22:29:45,107 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 13 [2019-11-19 22:29:45,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:29:45,107 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2019-11-19 22:29:45,107 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 22:29:45,107 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2019-11-19 22:29:45,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-19 22:29:45,108 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:29:45,109 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:29:45,310 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:29:45,310 INFO L410 AbstractCegarLoop]: === Iteration 3 === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, sll_remove_firstErr1REQUIRES_VIOLATION, sll_remove_firstErr0REQUIRES_VIOLATION, sll_remove_firstErr5REQUIRES_VIOLATION, sll_remove_firstErr10REQUIRES_VIOLATION, sll_remove_firstErr4REQUIRES_VIOLATION, sll_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, sll_remove_firstErr9REQUIRES_VIOLATION, sll_remove_firstErr3REQUIRES_VIOLATION, sll_remove_firstErr6ASSERT_VIOLATIONMEMORY_FREE, sll_remove_firstErr7ASSERT_VIOLATIONMEMORY_FREE, sll_remove_firstErr2REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-19 22:29:45,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:29:45,311 INFO L82 PathProgramCache]: Analyzing trace with hash -247912000, now seen corresponding path program 1 times [2019-11-19 22:29:45,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:29:45,311 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1479824748] [2019-11-19 22:29:45,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b20f43aa-4dc9-413f-acec-04652f4f39ad/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 [2019-11-19 22:29:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:29:45,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 22:29:45,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:29:45,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:29:45,553 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:29:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:29:45,626 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1479824748] [2019-11-19 22:29:45,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:29:45,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-11-19 22:29:45,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994495456] [2019-11-19 22:29:45,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-19 22:29:45,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 22:29:45,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-19 22:29:45,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-19 22:29:45,628 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 7 states. [2019-11-19 22:29:45,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:29:45,697 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2019-11-19 22:29:45,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 22:29:45,699 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-11-19 22:29:45,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:29:45,701 INFO L225 Difference]: With dead ends: 69 [2019-11-19 22:29:45,701 INFO L226 Difference]: Without dead ends: 66 [2019-11-19 22:29:45,702 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-19 22:29:45,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-19 22:29:45,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2019-11-19 22:29:45,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-19 22:29:45,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2019-11-19 22:29:45,725 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 15 [2019-11-19 22:29:45,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:29:45,726 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2019-11-19 22:29:45,726 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-19 22:29:45,726 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2019-11-19 22:29:45,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-19 22:29:45,727 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:29:45,727 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:29:45,930 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:29:45,930 INFO L410 AbstractCegarLoop]: === Iteration 4 === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, sll_remove_firstErr1REQUIRES_VIOLATION, sll_remove_firstErr0REQUIRES_VIOLATION, sll_remove_firstErr5REQUIRES_VIOLATION, sll_remove_firstErr10REQUIRES_VIOLATION, sll_remove_firstErr4REQUIRES_VIOLATION, sll_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, sll_remove_firstErr9REQUIRES_VIOLATION, sll_remove_firstErr3REQUIRES_VIOLATION, sll_remove_firstErr6ASSERT_VIOLATIONMEMORY_FREE, sll_remove_firstErr7ASSERT_VIOLATIONMEMORY_FREE, sll_remove_firstErr2REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-19 22:29:45,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:29:45,930 INFO L82 PathProgramCache]: Analyzing trace with hash -278961335, now seen corresponding path program 1 times [2019-11-19 22:29:45,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:29:45,931 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1440313938] [2019-11-19 22:29:45,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b20f43aa-4dc9-413f-acec-04652f4f39ad/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 [2019-11-19 22:29:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:29:46,164 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 22:29:46,166 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:29:46,173 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 [2019-11-19 22:29:46,173 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:29:46,180 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:29:46,181 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:29:46,181 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-19 22:29:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:29:46,221 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:29:46,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:29:46,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1440313938] [2019-11-19 22:29:46,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:29:46,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-19 22:29:46,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048835981] [2019-11-19 22:29:46,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 22:29:46,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 22:29:46,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 22:29:46,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-19 22:29:46,303 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 6 states. [2019-11-19 22:29:46,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:29:46,627 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2019-11-19 22:29:46,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 22:29:46,628 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-11-19 22:29:46,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:29:46,631 INFO L225 Difference]: With dead ends: 59 [2019-11-19 22:29:46,631 INFO L226 Difference]: Without dead ends: 59 [2019-11-19 22:29:46,632 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-19 22:29:46,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-19 22:29:46,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2019-11-19 22:29:46,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-19 22:29:46,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2019-11-19 22:29:46,639 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 19 [2019-11-19 22:29:46,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:29:46,640 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2019-11-19 22:29:46,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 22:29:46,640 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2019-11-19 22:29:46,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-19 22:29:46,641 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:29:46,641 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:29:46,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:29:46,849 INFO L410 AbstractCegarLoop]: === Iteration 5 === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, sll_remove_firstErr1REQUIRES_VIOLATION, sll_remove_firstErr0REQUIRES_VIOLATION, sll_remove_firstErr5REQUIRES_VIOLATION, sll_remove_firstErr10REQUIRES_VIOLATION, sll_remove_firstErr4REQUIRES_VIOLATION, sll_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, sll_remove_firstErr9REQUIRES_VIOLATION, sll_remove_firstErr3REQUIRES_VIOLATION, sll_remove_firstErr6ASSERT_VIOLATIONMEMORY_FREE, sll_remove_firstErr7ASSERT_VIOLATIONMEMORY_FREE, sll_remove_firstErr2REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-19 22:29:46,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:29:46,849 INFO L82 PathProgramCache]: Analyzing trace with hash -278961334, now seen corresponding path program 1 times [2019-11-19 22:29:46,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:29:46,850 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2093838274] [2019-11-19 22:29:46,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b20f43aa-4dc9-413f-acec-04652f4f39ad/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 [2019-11-19 22:29:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:29:47,072 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-19 22:29:47,074 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:29:47,109 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 [2019-11-19 22:29:47,109 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:29:47,119 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:29:47,119 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:29:47,120 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-19 22:29:47,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:29:47,198 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:29:47,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:29:47,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2093838274] [2019-11-19 22:29:47,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:29:47,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-19 22:29:47,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341165217] [2019-11-19 22:29:47,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-19 22:29:47,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 22:29:47,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-19 22:29:47,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-19 22:29:47,599 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 10 states. [2019-11-19 22:29:48,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:29:48,077 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2019-11-19 22:29:48,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 22:29:48,078 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2019-11-19 22:29:48,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:29:48,080 INFO L225 Difference]: With dead ends: 58 [2019-11-19 22:29:48,080 INFO L226 Difference]: Without dead ends: 58 [2019-11-19 22:29:48,080 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-19 22:29:48,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-19 22:29:48,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-11-19 22:29:48,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-19 22:29:48,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2019-11-19 22:29:48,086 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 19 [2019-11-19 22:29:48,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:29:48,086 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2019-11-19 22:29:48,086 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-19 22:29:48,086 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2019-11-19 22:29:48,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-19 22:29:48,087 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:29:48,087 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:29:48,290 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:29:48,291 INFO L410 AbstractCegarLoop]: === Iteration 6 === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, sll_remove_firstErr1REQUIRES_VIOLATION, sll_remove_firstErr0REQUIRES_VIOLATION, sll_remove_firstErr5REQUIRES_VIOLATION, sll_remove_firstErr10REQUIRES_VIOLATION, sll_remove_firstErr4REQUIRES_VIOLATION, sll_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, sll_remove_firstErr9REQUIRES_VIOLATION, sll_remove_firstErr3REQUIRES_VIOLATION, sll_remove_firstErr6ASSERT_VIOLATIONMEMORY_FREE, sll_remove_firstErr7ASSERT_VIOLATIONMEMORY_FREE, sll_remove_firstErr2REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-19 22:29:48,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:29:48,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1698647093, now seen corresponding path program 1 times [2019-11-19 22:29:48,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:29:48,292 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1481852354] [2019-11-19 22:29:48,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b20f43aa-4dc9-413f-acec-04652f4f39ad/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 [2019-11-19 22:29:48,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:29:48,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 22:29:48,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:29:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:29:48,575 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:29:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:29:48,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1481852354] [2019-11-19 22:29:48,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:29:48,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2019-11-19 22:29:48,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407710012] [2019-11-19 22:29:48,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-19 22:29:48,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 22:29:48,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-19 22:29:48,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-19 22:29:48,735 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 9 states. [2019-11-19 22:29:48,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:29:48,902 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2019-11-19 22:29:48,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-19 22:29:48,911 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2019-11-19 22:29:48,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:29:48,912 INFO L225 Difference]: With dead ends: 71 [2019-11-19 22:29:48,912 INFO L226 Difference]: Without dead ends: 68 [2019-11-19 22:29:48,912 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-19 22:29:48,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-19 22:29:48,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2019-11-19 22:29:48,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-19 22:29:48,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2019-11-19 22:29:48,919 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 28 [2019-11-19 22:29:48,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:29:48,920 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2019-11-19 22:29:48,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-19 22:29:48,920 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2019-11-19 22:29:48,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-19 22:29:48,922 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:29:48,922 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:29:49,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:29:49,123 INFO L410 AbstractCegarLoop]: === Iteration 7 === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, sll_remove_firstErr1REQUIRES_VIOLATION, sll_remove_firstErr0REQUIRES_VIOLATION, sll_remove_firstErr5REQUIRES_VIOLATION, sll_remove_firstErr10REQUIRES_VIOLATION, sll_remove_firstErr4REQUIRES_VIOLATION, sll_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, sll_remove_firstErr9REQUIRES_VIOLATION, sll_remove_firstErr3REQUIRES_VIOLATION, sll_remove_firstErr6ASSERT_VIOLATIONMEMORY_FREE, sll_remove_firstErr7ASSERT_VIOLATIONMEMORY_FREE, sll_remove_firstErr2REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-19 22:29:49,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:29:49,123 INFO L82 PathProgramCache]: Analyzing trace with hash -635596832, now seen corresponding path program 2 times [2019-11-19 22:29:49,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:29:49,124 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1561442173] [2019-11-19 22:29:49,124 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b20f43aa-4dc9-413f-acec-04652f4f39ad/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 [2019-11-19 22:29:49,274 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-19 22:29:49,274 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:29:49,276 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 22:29:49,278 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:29:49,296 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-19 22:29:49,296 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:29:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-19 22:29:49,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1561442173] [2019-11-19 22:29:49,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:29:49,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-19 22:29:49,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057050286] [2019-11-19 22:29:49,346 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 22:29:49,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 22:29:49,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 22:29:49,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-19 22:29:49,347 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 6 states. [2019-11-19 22:29:49,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:29:49,393 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2019-11-19 22:29:49,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 22:29:49,394 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2019-11-19 22:29:49,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:29:49,395 INFO L225 Difference]: With dead ends: 67 [2019-11-19 22:29:49,395 INFO L226 Difference]: Without dead ends: 67 [2019-11-19 22:29:49,395 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-19 22:29:49,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-19 22:29:49,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2019-11-19 22:29:49,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-19 22:29:49,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2019-11-19 22:29:49,401 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 41 [2019-11-19 22:29:49,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:29:49,401 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2019-11-19 22:29:49,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 22:29:49,402 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2019-11-19 22:29:49,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-19 22:29:49,403 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:29:49,403 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:29:49,607 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:29:49,608 INFO L410 AbstractCegarLoop]: === Iteration 8 === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, sll_remove_firstErr1REQUIRES_VIOLATION, sll_remove_firstErr0REQUIRES_VIOLATION, sll_remove_firstErr5REQUIRES_VIOLATION, sll_remove_firstErr10REQUIRES_VIOLATION, sll_remove_firstErr4REQUIRES_VIOLATION, sll_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, sll_remove_firstErr9REQUIRES_VIOLATION, sll_remove_firstErr3REQUIRES_VIOLATION, sll_remove_firstErr6ASSERT_VIOLATIONMEMORY_FREE, sll_remove_firstErr7ASSERT_VIOLATIONMEMORY_FREE, sll_remove_firstErr2REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-19 22:29:49,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:29:49,608 INFO L82 PathProgramCache]: Analyzing trace with hash -923097109, now seen corresponding path program 1 times [2019-11-19 22:29:49,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:29:49,609 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [535586109] [2019-11-19 22:29:49,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b20f43aa-4dc9-413f-acec-04652f4f39ad/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 [2019-11-19 22:29:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:29:49,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-19 22:29:49,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:29:49,946 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 [2019-11-19 22:29:49,947 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:29:49,956 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:29:49,960 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 [2019-11-19 22:29:49,960 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 22:29:49,969 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:29:49,970 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:29:49,970 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2019-11-19 22:29:50,170 INFO L392 ElimStorePlain]: Different costs {1=[|v_old(#valid)_AFTER_CALL_32|], 2=[|v_old(#length)_AFTER_CALL_24|]} [2019-11-19 22:29:50,191 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:29:50,192 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2019-11-19 22:29:50,192 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:29:50,208 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:29:50,272 INFO L343 Elim1Store]: treesize reduction 14, result has 64.1 percent of original size [2019-11-19 22:29:50,273 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 35 [2019-11-19 22:29:50,274 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 22:29:50,312 INFO L567 ElimStorePlain]: treesize reduction 10, result has 73.0 percent of original size [2019-11-19 22:29:50,312 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:29:50,315 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-19 22:29:50,315 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:30, output treesize:27 [2019-11-19 22:29:50,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:29:50,371 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:29:50,431 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:29:50,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:29:50,689 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:29:50,689 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:29:51,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-19 22:29:51,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:29:51,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:29:51,251 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-19 22:29:51,252 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-19 22:29:51,254 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:29:51,255 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-19 22:29:51,257 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-19 22:30:01,811 WARN L191 SmtUtils]: Spent 3.52 s on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2019-11-19 22:30:13,318 WARN L191 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2019-11-19 22:30:13,321 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:30:13,326 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-11-19 22:30:13,331 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-11-19 22:30:13,347 INFO L392 ElimStorePlain]: Different costs {3=[|v_old(#valid)_BEFORE_CALL_3|], 5=[|v_old(#length)_BEFORE_CALL_3|]} [2019-11-19 22:30:13,551 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:30:13,551 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Alternating quantifiers not yet supported at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:271) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:253) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:419) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:291) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:334) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:177) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-19 22:30:13,555 INFO L168 Benchmark]: Toolchain (without parser) took 31320.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 212.9 MB). Free memory was 944.7 MB in the beginning and 871.7 MB in the end (delta: 73.1 MB). Peak memory consumption was 285.9 MB. Max. memory is 11.5 GB. [2019-11-19 22:30:13,556 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:30:13,557 INFO L168 Benchmark]: CACSL2BoogieTranslator took 556.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -172.1 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2019-11-19 22:30:13,557 INFO L168 Benchmark]: Boogie Preprocessor took 67.13 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-11-19 22:30:13,558 INFO L168 Benchmark]: RCFGBuilder took 808.13 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 60.9 MB). Peak memory consumption was 60.9 MB. Max. memory is 11.5 GB. [2019-11-19 22:30:13,559 INFO L168 Benchmark]: TraceAbstraction took 29883.11 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 67.6 MB). Free memory was 1.1 GB in the beginning and 871.7 MB in the end (delta: 182.6 MB). Peak memory consumption was 250.2 MB. Max. memory is 11.5 GB. [2019-11-19 22:30:13,562 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 556.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -172.1 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 67.13 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 808.13 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 60.9 MB). Peak memory consumption was 60.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 29883.11 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 67.6 MB). Free memory was 1.1 GB in the beginning and 871.7 MB in the end (delta: 182.6 MB). Peak memory consumption was 250.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Alternating quantifiers not yet supported de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Alternating quantifiers not yet supported: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:271) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...