./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test10-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test10-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa --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 207ea7efa81a205528159a2c1c5225b996f0eb4901bda418907cbc964f19b86c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:32:05,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:32:05,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:32:05,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:32:05,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:32:05,136 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:32:05,137 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:32:05,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:32:05,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:32:05,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:32:05,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:32:05,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:32:05,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:32:05,145 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:32:05,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:32:05,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:32:05,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:32:05,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:32:05,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:32:05,152 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:32:05,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:32:05,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:32:05,156 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:32:05,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:32:05,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:32:05,159 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:32:05,159 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:32:05,160 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:32:05,161 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:32:05,162 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:32:05,162 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:32:05,162 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:32:05,163 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:32:05,164 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:32:05,165 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:32:05,165 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:32:05,165 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:32:05,166 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:32:05,166 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:32:05,167 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:32:05,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:32:05,168 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-07 00:32:05,185 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:32:05,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:32:05,185 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:32:05,185 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:32:05,186 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:32:05,186 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:32:05,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:32:05,187 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:32:05,187 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:32:05,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:32:05,187 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:32:05,187 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-07 00:32:05,187 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:32:05,187 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:32:05,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:32:05,188 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-07 00:32:05,188 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-07 00:32:05,188 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-07 00:32:05,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:32:05,188 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-07 00:32:05,188 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:32:05,188 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:32:05,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:32:05,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:32:05,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:32:05,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:32:05,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:32:05,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:32:05,189 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:32:05,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:32:05,190 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:32:05,190 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 207ea7efa81a205528159a2c1c5225b996f0eb4901bda418907cbc964f19b86c [2021-12-07 00:32:05,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:32:05,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:32:05,395 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:32:05,396 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:32:05,396 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:32:05,397 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/ldv-memsafety/memleaks_test10-1.i [2021-12-07 00:32:05,444 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/data/e24d74f73/1ebdca71c81e45e595520e234185b397/FLAG3893a3694 [2021-12-07 00:32:05,854 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:32:05,855 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/sv-benchmarks/c/ldv-memsafety/memleaks_test10-1.i [2021-12-07 00:32:05,865 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/data/e24d74f73/1ebdca71c81e45e595520e234185b397/FLAG3893a3694 [2021-12-07 00:32:05,875 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/data/e24d74f73/1ebdca71c81e45e595520e234185b397 [2021-12-07 00:32:05,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:32:05,878 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:32:05,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:32:05,879 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:32:05,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:32:05,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:32:05" (1/1) ... [2021-12-07 00:32:05,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47718142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:32:05, skipping insertion in model container [2021-12-07 00:32:05,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:32:05" (1/1) ... [2021-12-07 00:32:05,888 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:32:05,914 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:32:06,179 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:32:06,192 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-07 00:32:06,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@46aa0579 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:32:06, skipping insertion in model container [2021-12-07 00:32:06,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:32:06,193 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-07 00:32:06,194 INFO L158 Benchmark]: Toolchain (without parser) took 315.51ms. Allocated memory is still 92.3MB. Free memory was 58.8MB in the beginning and 67.5MB in the end (delta: -8.8MB). Peak memory consumption was 17.5MB. Max. memory is 16.1GB. [2021-12-07 00:32:06,194 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 69.2MB. Free memory is still 42.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 00:32:06,195 INFO L158 Benchmark]: CACSL2BoogieTranslator took 313.58ms. Allocated memory is still 92.3MB. Free memory was 58.5MB in the beginning and 67.5MB in the end (delta: -9.0MB). Peak memory consumption was 17.5MB. Max. memory is 16.1GB. [2021-12-07 00:32:06,196 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 69.2MB. Free memory is still 42.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 313.58ms. Allocated memory is still 92.3MB. Free memory was 58.5MB in the beginning and 67.5MB in the end (delta: -9.0MB). Peak memory consumption was 17.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test10-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa --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 207ea7efa81a205528159a2c1c5225b996f0eb4901bda418907cbc964f19b86c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:32:07,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:32:07,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:32:07,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:32:07,567 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:32:07,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:32:07,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:32:07,572 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:32:07,574 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:32:07,575 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:32:07,577 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:32:07,578 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:32:07,578 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:32:07,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:32:07,581 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:32:07,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:32:07,583 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:32:07,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:32:07,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:32:07,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:32:07,591 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:32:07,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:32:07,594 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:32:07,594 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:32:07,598 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:32:07,598 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:32:07,599 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:32:07,600 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:32:07,600 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:32:07,602 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:32:07,602 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:32:07,603 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:32:07,603 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:32:07,604 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:32:07,605 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:32:07,605 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:32:07,606 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:32:07,606 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:32:07,606 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:32:07,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:32:07,607 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:32:07,608 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-07 00:32:07,634 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:32:07,634 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:32:07,634 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:32:07,634 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:32:07,635 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:32:07,635 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:32:07,635 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:32:07,636 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:32:07,636 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:32:07,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:32:07,636 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:32:07,636 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-07 00:32:07,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:32:07,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:32:07,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:32:07,637 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-07 00:32:07,637 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-07 00:32:07,637 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-07 00:32:07,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:32:07,637 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-07 00:32:07,637 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-07 00:32:07,637 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-07 00:32:07,637 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:32:07,638 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:32:07,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:32:07,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:32:07,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:32:07,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:32:07,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:32:07,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:32:07,639 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-07 00:32:07,639 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-07 00:32:07,639 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:32:07,639 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-07 00:32:07,639 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 207ea7efa81a205528159a2c1c5225b996f0eb4901bda418907cbc964f19b86c [2021-12-07 00:32:07,852 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:32:07,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:32:07,868 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:32:07,869 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:32:07,869 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:32:07,870 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/ldv-memsafety/memleaks_test10-1.i [2021-12-07 00:32:07,911 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/data/c7fc3a9f5/1636084ba9414f229c0ec6574730d463/FLAG29d44bf3a [2021-12-07 00:32:08,282 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:32:08,283 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/sv-benchmarks/c/ldv-memsafety/memleaks_test10-1.i [2021-12-07 00:32:08,296 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/data/c7fc3a9f5/1636084ba9414f229c0ec6574730d463/FLAG29d44bf3a [2021-12-07 00:32:08,649 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/data/c7fc3a9f5/1636084ba9414f229c0ec6574730d463 [2021-12-07 00:32:08,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:32:08,652 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:32:08,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:32:08,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:32:08,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:32:08,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:32:08" (1/1) ... [2021-12-07 00:32:08,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ae87889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:32:08, skipping insertion in model container [2021-12-07 00:32:08,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:32:08" (1/1) ... [2021-12-07 00:32:08,666 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:32:08,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:32:08,923 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:32:08,936 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-07 00:32:08,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:32:08,976 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:32:08,982 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:32:09,019 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:32:09,053 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:32:09,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:32:09 WrapperNode [2021-12-07 00:32:09,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:32:09,054 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:32:09,054 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:32:09,054 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:32:09,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:32:09" (1/1) ... [2021-12-07 00:32:09,076 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:32:09" (1/1) ... [2021-12-07 00:32:09,092 INFO L137 Inliner]: procedures = 167, calls = 91, calls flagged for inlining = 22, calls inlined = 4, statements flattened = 66 [2021-12-07 00:32:09,092 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:32:09,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:32:09,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:32:09,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:32:09,098 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:32:09" (1/1) ... [2021-12-07 00:32:09,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:32:09" (1/1) ... [2021-12-07 00:32:09,101 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:32:09" (1/1) ... [2021-12-07 00:32:09,102 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:32:09" (1/1) ... [2021-12-07 00:32:09,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:32:09" (1/1) ... [2021-12-07 00:32:09,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:32:09" (1/1) ... [2021-12-07 00:32:09,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:32:09" (1/1) ... [2021-12-07 00:32:09,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:32:09,114 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:32:09,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:32:09,114 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:32:09,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:32:09" (1/1) ... [2021-12-07 00:32:09,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:32:09,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:32:09,138 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:32:09,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:32:09,166 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-07 00:32:09,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-07 00:32:09,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-07 00:32:09,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:32:09,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-07 00:32:09,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-07 00:32:09,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 00:32:09,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-07 00:32:09,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:32:09,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:32:09,245 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:32:09,246 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:32:09,490 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:32:09,497 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:32:09,497 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-07 00:32:09,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:32:09 BoogieIcfgContainer [2021-12-07 00:32:09,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:32:09,500 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:32:09,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:32:09,502 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:32:09,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:32:08" (1/3) ... [2021-12-07 00:32:09,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32760ea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:32:09, skipping insertion in model container [2021-12-07 00:32:09,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:32:09" (2/3) ... [2021-12-07 00:32:09,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32760ea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:32:09, skipping insertion in model container [2021-12-07 00:32:09,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:32:09" (3/3) ... [2021-12-07 00:32:09,505 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test10-1.i [2021-12-07 00:32:09,509 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:32:09,509 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2021-12-07 00:32:09,548 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:32:09,553 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-07 00:32:09,554 INFO L340 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2021-12-07 00:32:09,569 INFO L276 IsEmpty]: Start isEmpty. Operand has 77 states, 37 states have (on average 2.027027027027027) internal successors, (75), 71 states have internal predecessors, (75), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 00:32:09,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-07 00:32:09,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:32:09,575 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:32:09,575 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:32:09,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:32:09,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1838783457, now seen corresponding path program 1 times [2021-12-07 00:32:09,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:32:09,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1382023760] [2021-12-07 00:32:09,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:32:09,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:32:09,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:32:09,589 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:32:09,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-07 00:32:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:32:09,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:32:09,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:32:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:32:09,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:32:09,712 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:32:09,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1382023760] [2021-12-07 00:32:09,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1382023760] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:32:09,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:32:09,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:32:09,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390634549] [2021-12-07 00:32:09,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:32:09,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:32:09,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:32:09,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:32:09,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:32:09,739 INFO L87 Difference]: Start difference. First operand has 77 states, 37 states have (on average 2.027027027027027) internal successors, (75), 71 states have internal predecessors, (75), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-07 00:32:09,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:32:09,908 INFO L93 Difference]: Finished difference Result 148 states and 165 transitions. [2021-12-07 00:32:09,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:32:09,910 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-12-07 00:32:09,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:32:09,917 INFO L225 Difference]: With dead ends: 148 [2021-12-07 00:32:09,917 INFO L226 Difference]: Without dead ends: 144 [2021-12-07 00:32:09,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:32:09,921 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 67 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:32:09,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 384 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:32:09,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-07 00:32:09,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 79. [2021-12-07 00:32:09,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 72 states have internal predecessors, (76), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-07 00:32:09,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2021-12-07 00:32:09,961 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 11 [2021-12-07 00:32:09,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:32:09,961 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2021-12-07 00:32:09,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-07 00:32:09,962 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2021-12-07 00:32:09,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-07 00:32:09,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:32:09,963 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:32:09,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:32:10,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:32:10,165 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:32:10,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:32:10,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1568680158, now seen corresponding path program 1 times [2021-12-07 00:32:10,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:32:10,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1056431611] [2021-12-07 00:32:10,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:32:10,168 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:32:10,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:32:10,170 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:32:10,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-07 00:32:10,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:32:10,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:32:10,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:32:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:32:10,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:32:10,342 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:32:10,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1056431611] [2021-12-07 00:32:10,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1056431611] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:32:10,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:32:10,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:32:10,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618702996] [2021-12-07 00:32:10,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:32:10,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:32:10,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:32:10,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:32:10,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:32:10,344 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-07 00:32:10,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:32:10,517 INFO L93 Difference]: Finished difference Result 144 states and 160 transitions. [2021-12-07 00:32:10,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:32:10,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-12-07 00:32:10,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:32:10,520 INFO L225 Difference]: With dead ends: 144 [2021-12-07 00:32:10,520 INFO L226 Difference]: Without dead ends: 142 [2021-12-07 00:32:10,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:32:10,522 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 60 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:32:10,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 247 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:32:10,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-07 00:32:10,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 75. [2021-12-07 00:32:10,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 36 states have (on average 2.0) internal successors, (72), 69 states have internal predecessors, (72), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 00:32:10,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2021-12-07 00:32:10,533 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 11 [2021-12-07 00:32:10,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:32:10,534 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2021-12-07 00:32:10,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-07 00:32:10,534 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2021-12-07 00:32:10,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-07 00:32:10,535 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:32:10,535 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:32:10,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-07 00:32:10,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:32:10,737 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:32:10,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:32:10,739 INFO L85 PathProgramCache]: Analyzing trace with hash -27781040, now seen corresponding path program 1 times [2021-12-07 00:32:10,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:32:10,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753557601] [2021-12-07 00:32:10,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:32:10,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:32:10,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:32:10,744 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:32:10,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-07 00:32:10,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:32:10,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 00:32:10,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:32:10,899 INFO L388 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 [2021-12-07 00:32:11,003 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-07 00:32:11,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2021-12-07 00:32:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:32:11,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:32:11,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:32:11,199 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:32:11,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [753557601] [2021-12-07 00:32:11,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [753557601] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:32:11,199 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:32:11,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-12-07 00:32:11,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260753326] [2021-12-07 00:32:11,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:32:11,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 00:32:11,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:32:11,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 00:32:11,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:32:11,201 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 00:32:11,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:32:11,494 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2021-12-07 00:32:11,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:32:11,495 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 15 [2021-12-07 00:32:11,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:32:11,496 INFO L225 Difference]: With dead ends: 100 [2021-12-07 00:32:11,496 INFO L226 Difference]: Without dead ends: 100 [2021-12-07 00:32:11,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:32:11,498 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 52 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:32:11,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 249 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 235 Invalid, 0 Unknown, 131 Unchecked, 0.3s Time] [2021-12-07 00:32:11,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-07 00:32:11,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2021-12-07 00:32:11,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 51 states have (on average 1.8627450980392157) internal successors, (95), 80 states have internal predecessors, (95), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-07 00:32:11,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 110 transitions. [2021-12-07 00:32:11,508 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 110 transitions. Word has length 15 [2021-12-07 00:32:11,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:32:11,508 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 110 transitions. [2021-12-07 00:32:11,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 00:32:11,508 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 110 transitions. [2021-12-07 00:32:11,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-07 00:32:11,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:32:11,509 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:32:11,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-07 00:32:11,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:32:11,711 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:32:11,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:32:11,713 INFO L85 PathProgramCache]: Analyzing trace with hash -27781039, now seen corresponding path program 1 times [2021-12-07 00:32:11,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:32:11,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [686088169] [2021-12-07 00:32:11,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:32:11,716 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:32:11,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:32:11,718 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:32:11,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-07 00:32:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:32:11,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-07 00:32:11,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:32:11,866 INFO L388 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 [2021-12-07 00:32:16,033 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 00:32:16,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 00:32:16,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:32:16,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:32:16,268 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:32:16,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [686088169] [2021-12-07 00:32:16,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [686088169] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:32:16,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1040523775] [2021-12-07 00:32:16,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:32:16,269 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 00:32:16,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 00:32:16,270 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 00:32:16,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-12-07 00:32:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:32:16,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-07 00:32:16,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:32:16,360 INFO L388 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 [2021-12-07 00:32:16,366 INFO L388 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 [2021-12-07 00:32:20,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:32:20,624 INFO L388 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 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 00:32:20,633 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:32:20,634 INFO L388 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 23 treesize of output 23 [2021-12-07 00:32:20,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:32:20,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:32:23,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1040523775] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:32:23,818 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:32:23,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-12-07 00:32:23,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195993537] [2021-12-07 00:32:23,819 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:32:23,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 00:32:23,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:32:23,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 00:32:23,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=225, Unknown=4, NotChecked=0, Total=272 [2021-12-07 00:32:23,820 INFO L87 Difference]: Start difference. First operand 90 states and 110 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-07 00:32:28,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:32:28,629 INFO L93 Difference]: Finished difference Result 148 states and 172 transitions. [2021-12-07 00:32:28,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 00:32:28,629 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 15 [2021-12-07 00:32:28,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:32:28,631 INFO L225 Difference]: With dead ends: 148 [2021-12-07 00:32:28,631 INFO L226 Difference]: Without dead ends: 148 [2021-12-07 00:32:28,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=56, Invalid=280, Unknown=6, NotChecked=0, Total=342 [2021-12-07 00:32:28,633 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 104 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:32:28,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 534 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 615 Invalid, 0 Unknown, 156 Unchecked, 0.7s Time] [2021-12-07 00:32:28,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-07 00:32:28,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 118. [2021-12-07 00:32:28,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.8311688311688312) internal successors, (141), 106 states have internal predecessors, (141), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (14), 10 states have call predecessors, (14), 7 states have call successors, (14) [2021-12-07 00:32:28,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 162 transitions. [2021-12-07 00:32:28,645 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 162 transitions. Word has length 15 [2021-12-07 00:32:28,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:32:28,645 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 162 transitions. [2021-12-07 00:32:28,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-07 00:32:28,646 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 162 transitions. [2021-12-07 00:32:28,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-07 00:32:28,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:32:28,647 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:32:28,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-12-07 00:32:28,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-07 00:32:29,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:32:29,049 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:32:29,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:32:29,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1824732399, now seen corresponding path program 1 times [2021-12-07 00:32:29,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:32:29,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81578056] [2021-12-07 00:32:29,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:32:29,053 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:32:29,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:32:29,055 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:32:29,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-07 00:32:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:32:29,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 00:32:29,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:32:29,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:32:29,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:32:29,148 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:32:29,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81578056] [2021-12-07 00:32:29,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81578056] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:32:29,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:32:29,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:32:29,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263885627] [2021-12-07 00:32:29,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:32:29,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:32:29,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:32:29,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:32:29,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:32:29,150 INFO L87 Difference]: Start difference. First operand 118 states and 162 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 00:32:29,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:32:29,197 INFO L93 Difference]: Finished difference Result 103 states and 137 transitions. [2021-12-07 00:32:29,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:32:29,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2021-12-07 00:32:29,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:32:29,198 INFO L225 Difference]: With dead ends: 103 [2021-12-07 00:32:29,198 INFO L226 Difference]: Without dead ends: 101 [2021-12-07 00:32:29,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:32:29,199 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 0 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:32:29,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 288 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:32:29,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-07 00:32:29,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-12-07 00:32:29,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 66 states have (on average 1.8333333333333333) internal successors, (121), 92 states have internal predecessors, (121), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-07 00:32:29,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 135 transitions. [2021-12-07 00:32:29,206 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 135 transitions. Word has length 15 [2021-12-07 00:32:29,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:32:29,206 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 135 transitions. [2021-12-07 00:32:29,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 00:32:29,206 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 135 transitions. [2021-12-07 00:32:29,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-07 00:32:29,207 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:32:29,207 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:32:29,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-07 00:32:29,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:32:29,409 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:32:29,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:32:29,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1259761877, now seen corresponding path program 1 times [2021-12-07 00:32:29,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:32:29,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789287763] [2021-12-07 00:32:29,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:32:29,413 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:32:29,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:32:29,416 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:32:29,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-07 00:32:29,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:32:29,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 00:32:29,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:32:29,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:32:29,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-07 00:32:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:32:29,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:32:29,548 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:32:29,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [789287763] [2021-12-07 00:32:29,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [789287763] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:32:29,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:32:29,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 00:32:29,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70753900] [2021-12-07 00:32:29,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:32:29,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:32:29,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:32:29,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:32:29,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:32:29,549 INFO L87 Difference]: Start difference. First operand 101 states and 135 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 00:32:29,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:32:29,660 INFO L93 Difference]: Finished difference Result 111 states and 149 transitions. [2021-12-07 00:32:29,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:32:29,660 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-12-07 00:32:29,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:32:29,661 INFO L225 Difference]: With dead ends: 111 [2021-12-07 00:32:29,661 INFO L226 Difference]: Without dead ends: 111 [2021-12-07 00:32:29,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:32:29,662 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 5 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:32:29,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 330 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:32:29,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-07 00:32:29,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 105. [2021-12-07 00:32:29,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 70 states have (on average 1.7857142857142858) internal successors, (125), 95 states have internal predecessors, (125), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-07 00:32:29,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 139 transitions. [2021-12-07 00:32:29,669 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 139 transitions. Word has length 20 [2021-12-07 00:32:29,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:32:29,670 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 139 transitions. [2021-12-07 00:32:29,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 00:32:29,670 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 139 transitions. [2021-12-07 00:32:29,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-07 00:32:29,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:32:29,671 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:32:29,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-07 00:32:29,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:32:29,873 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:32:29,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:32:29,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1227750956, now seen corresponding path program 1 times [2021-12-07 00:32:29,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:32:29,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281991161] [2021-12-07 00:32:29,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:32:29,878 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:32:29,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:32:29,881 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:32:29,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-07 00:32:29,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:32:29,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 00:32:29,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:32:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:32:30,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:32:30,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:32:30,203 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:32:30,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281991161] [2021-12-07 00:32:30,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1281991161] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:32:30,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:32:30,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-07 00:32:30,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239172073] [2021-12-07 00:32:30,203 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:32:30,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 00:32:30,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:32:30,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 00:32:30,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:32:30,204 INFO L87 Difference]: Start difference. First operand 105 states and 139 transitions. Second operand has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 00:32:30,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:32:30,408 INFO L93 Difference]: Finished difference Result 108 states and 141 transitions. [2021-12-07 00:32:30,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 00:32:30,409 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 20 [2021-12-07 00:32:30,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:32:30,410 INFO L225 Difference]: With dead ends: 108 [2021-12-07 00:32:30,410 INFO L226 Difference]: Without dead ends: 108 [2021-12-07 00:32:30,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-07 00:32:30,411 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 120 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:32:30,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 189 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 134 Invalid, 0 Unknown, 10 Unchecked, 0.2s Time] [2021-12-07 00:32:30,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-07 00:32:30,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-12-07 00:32:30,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 73 states have (on average 1.7397260273972603) internal successors, (127), 97 states have internal predecessors, (127), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-07 00:32:30,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 141 transitions. [2021-12-07 00:32:30,415 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 141 transitions. Word has length 20 [2021-12-07 00:32:30,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:32:30,416 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 141 transitions. [2021-12-07 00:32:30,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 00:32:30,416 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 141 transitions. [2021-12-07 00:32:30,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-07 00:32:30,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:32:30,417 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:32:30,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-07 00:32:30,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:32:30,618 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:32:30,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:32:30,618 INFO L85 PathProgramCache]: Analyzing trace with hash -12644306, now seen corresponding path program 1 times [2021-12-07 00:32:30,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:32:30,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412207340] [2021-12-07 00:32:30,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:32:30,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:32:30,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:32:30,619 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:32:30,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-07 00:32:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:32:30,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-07 00:32:30,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:32:30,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:32:30,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:32:30,963 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:32:30,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412207340] [2021-12-07 00:32:30,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412207340] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:32:30,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [472119263] [2021-12-07 00:32:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:32:30,964 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 00:32:30,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 00:32:30,965 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 00:32:30,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-12-07 00:32:31,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:32:31,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-07 00:32:31,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:32:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:32:31,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:32:31,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [472119263] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:32:31,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:32:31,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-12-07 00:32:31,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416181499] [2021-12-07 00:32:31,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:32:31,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 00:32:31,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:32:31,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 00:32:31,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:32:31,335 INFO L87 Difference]: Start difference. First operand 108 states and 141 transitions. Second operand has 12 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 00:32:31,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:32:31,512 INFO L93 Difference]: Finished difference Result 117 states and 148 transitions. [2021-12-07 00:32:31,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 00:32:31,513 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 23 [2021-12-07 00:32:31,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:32:31,513 INFO L225 Difference]: With dead ends: 117 [2021-12-07 00:32:31,514 INFO L226 Difference]: Without dead ends: 110 [2021-12-07 00:32:31,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-12-07 00:32:31,514 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 9 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:32:31,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 378 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 128 Invalid, 0 Unknown, 207 Unchecked, 0.1s Time] [2021-12-07 00:32:31,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-07 00:32:31,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2021-12-07 00:32:31,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 69 states have (on average 1.7681159420289856) internal successors, (122), 94 states have internal predecessors, (122), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-07 00:32:31,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 136 transitions. [2021-12-07 00:32:31,519 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 136 transitions. Word has length 23 [2021-12-07 00:32:31,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:32:31,519 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 136 transitions. [2021-12-07 00:32:31,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 00:32:31,519 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 136 transitions. [2021-12-07 00:32:31,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-07 00:32:31,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:32:31,520 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:32:31,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-07 00:32:31,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2021-12-07 00:32:31,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 00:32:31,922 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:32:31,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:32:31,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1738347476, now seen corresponding path program 1 times [2021-12-07 00:32:31,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:32:31,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420001586] [2021-12-07 00:32:31,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:32:31,926 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:32:31,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:32:31,928 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:32:31,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-07 00:32:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:32:32,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-07 00:32:32,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:32:32,039 INFO L388 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 [2021-12-07 00:32:32,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:32:32,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-12-07 00:32:32,154 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-07 00:32:32,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 24 [2021-12-07 00:32:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:32:32,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:32:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:32:32,351 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:32:32,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420001586] [2021-12-07 00:32:32,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420001586] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:32:32,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:32:32,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-12-07 00:32:32,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556926046] [2021-12-07 00:32:32,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:32:32,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 00:32:32,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:32:32,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 00:32:32,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:32:32,353 INFO L87 Difference]: Start difference. First operand 105 states and 136 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 00:32:32,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:32:32,616 INFO L93 Difference]: Finished difference Result 121 states and 153 transitions. [2021-12-07 00:32:32,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 00:32:32,616 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2021-12-07 00:32:32,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:32:32,617 INFO L225 Difference]: With dead ends: 121 [2021-12-07 00:32:32,617 INFO L226 Difference]: Without dead ends: 121 [2021-12-07 00:32:32,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-07 00:32:32,618 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 8 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:32:32,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 290 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 178 Invalid, 0 Unknown, 97 Unchecked, 0.2s Time] [2021-12-07 00:32:32,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-07 00:32:32,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2021-12-07 00:32:32,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 80 states have (on average 1.7) internal successors, (136), 104 states have internal predecessors, (136), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (11), 10 states have call predecessors, (11), 6 states have call successors, (11) [2021-12-07 00:32:32,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 153 transitions. [2021-12-07 00:32:32,622 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 153 transitions. Word has length 25 [2021-12-07 00:32:32,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:32:32,622 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 153 transitions. [2021-12-07 00:32:32,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 00:32:32,622 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 153 transitions. [2021-12-07 00:32:32,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-07 00:32:32,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:32:32,623 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:32:32,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-07 00:32:32,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:32:32,824 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:32:32,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:32:32,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1738347475, now seen corresponding path program 1 times [2021-12-07 00:32:32,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:32:32,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216573634] [2021-12-07 00:32:32,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:32:32,828 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:32:32,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:32:32,830 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:32:32,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-07 00:32:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:32:32,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 00:32:32,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:32:32,997 INFO L388 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 [2021-12-07 00:32:33,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:32:33,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:32:33,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-07 00:32:33,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 00:32:37,184 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 00:32:37,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 00:32:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:32:37,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:32:37,441 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:32:37,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216573634] [2021-12-07 00:32:37,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216573634] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:32:37,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [524955060] [2021-12-07 00:32:37,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:32:37,441 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 00:32:37,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 00:32:37,442 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 00:32:37,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-12-07 00:32:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:32:37,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-07 00:32:37,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:32:37,550 INFO L388 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 [2021-12-07 00:32:37,556 INFO L388 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 [2021-12-07 00:32:37,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:32:37,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:32:37,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-12-07 00:32:37,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 00:32:43,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:32:43,903 INFO L388 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 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 00:32:43,910 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:32:43,911 INFO L388 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 24 treesize of output 24 [2021-12-07 00:32:43,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:32:43,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:32:46,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [524955060] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:32:46,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:32:46,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-12-07 00:32:46,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117536664] [2021-12-07 00:32:46,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:32:46,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-07 00:32:46,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:32:46,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-07 00:32:46,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=289, Unknown=5, NotChecked=0, Total=342 [2021-12-07 00:32:46,226 INFO L87 Difference]: Start difference. First operand 119 states and 153 transitions. Second operand has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-07 00:32:50,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:32:50,745 INFO L93 Difference]: Finished difference Result 121 states and 153 transitions. [2021-12-07 00:32:50,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 00:32:50,746 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 25 [2021-12-07 00:32:50,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:32:50,747 INFO L225 Difference]: With dead ends: 121 [2021-12-07 00:32:50,747 INFO L226 Difference]: Without dead ends: 121 [2021-12-07 00:32:50,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=76, Invalid=423, Unknown=7, NotChecked=0, Total=506 [2021-12-07 00:32:50,747 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 13 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:32:50,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 441 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 283 Invalid, 0 Unknown, 82 Unchecked, 0.4s Time] [2021-12-07 00:32:50,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-07 00:32:50,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2021-12-07 00:32:50,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 80 states have (on average 1.675) internal successors, (134), 104 states have internal predecessors, (134), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (11), 10 states have call predecessors, (11), 6 states have call successors, (11) [2021-12-07 00:32:50,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 151 transitions. [2021-12-07 00:32:50,752 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 151 transitions. Word has length 25 [2021-12-07 00:32:50,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:32:50,752 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 151 transitions. [2021-12-07 00:32:50,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-07 00:32:50,752 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 151 transitions. [2021-12-07 00:32:50,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-07 00:32:50,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:32:50,753 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:32:50,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-07 00:32:50,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-12-07 00:32:51,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 00:32:51,155 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:32:51,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:32:51,156 INFO L85 PathProgramCache]: Analyzing trace with hash 2051061195, now seen corresponding path program 1 times [2021-12-07 00:32:51,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:32:51,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932973983] [2021-12-07 00:32:51,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:32:51,157 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:32:51,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:32:51,158 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:32:51,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-07 00:32:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:32:51,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-07 00:32:51,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:32:51,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:32:51,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:32:51,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 00:32:51,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 00:32:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:32:51,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:32:51,302 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:32:51,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932973983] [2021-12-07 00:32:51,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932973983] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:32:51,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:32:51,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 00:32:51,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353645494] [2021-12-07 00:32:51,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:32:51,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:32:51,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:32:51,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:32:51,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:32:51,304 INFO L87 Difference]: Start difference. First operand 119 states and 151 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 00:32:51,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:32:51,414 INFO L93 Difference]: Finished difference Result 113 states and 140 transitions. [2021-12-07 00:32:51,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:32:51,415 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-12-07 00:32:51,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:32:51,415 INFO L225 Difference]: With dead ends: 113 [2021-12-07 00:32:51,415 INFO L226 Difference]: Without dead ends: 107 [2021-12-07 00:32:51,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:32:51,416 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 2 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:32:51,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 330 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:32:51,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-07 00:32:51,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-12-07 00:32:51,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 72 states have (on average 1.6805555555555556) internal successors, (121), 95 states have internal predecessors, (121), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-07 00:32:51,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 134 transitions. [2021-12-07 00:32:51,419 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 134 transitions. Word has length 25 [2021-12-07 00:32:51,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:32:51,420 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 134 transitions. [2021-12-07 00:32:51,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 00:32:51,420 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 134 transitions. [2021-12-07 00:32:51,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-07 00:32:51,420 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:32:51,420 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:32:51,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-07 00:32:51,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:32:51,621 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:32:51,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:32:51,623 INFO L85 PathProgramCache]: Analyzing trace with hash 190353901, now seen corresponding path program 1 times [2021-12-07 00:32:51,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:32:51,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [49269235] [2021-12-07 00:32:51,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:32:51,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:32:51,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:32:51,627 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:32:51,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-07 00:32:51,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:32:51,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 00:32:51,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:32:51,725 INFO L388 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 [2021-12-07 00:32:51,789 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-07 00:32:51,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2021-12-07 00:32:51,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:32:51,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:32:51,800 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:32:51,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [49269235] [2021-12-07 00:32:51,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [49269235] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:32:51,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:32:51,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:32:51,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343972604] [2021-12-07 00:32:51,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:32:51,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:32:51,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:32:51,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:32:51,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:32:51,801 INFO L87 Difference]: Start difference. First operand 107 states and 134 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 00:32:51,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:32:51,918 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2021-12-07 00:32:51,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:32:51,918 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-12-07 00:32:51,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:32:51,919 INFO L225 Difference]: With dead ends: 110 [2021-12-07 00:32:51,919 INFO L226 Difference]: Without dead ends: 110 [2021-12-07 00:32:51,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:32:51,920 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 37 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:32:51,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 111 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 81 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2021-12-07 00:32:51,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-07 00:32:51,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2021-12-07 00:32:51,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 72 states have (on average 1.6666666666666667) internal successors, (120), 94 states have internal predecessors, (120), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-07 00:32:51,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 133 transitions. [2021-12-07 00:32:51,923 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 133 transitions. Word has length 27 [2021-12-07 00:32:51,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:32:51,923 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 133 transitions. [2021-12-07 00:32:51,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 00:32:51,923 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 133 transitions. [2021-12-07 00:32:51,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-07 00:32:51,924 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:32:51,924 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:32:51,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-07 00:32:52,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:32:52,125 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:32:52,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:32:52,127 INFO L85 PathProgramCache]: Analyzing trace with hash 190353902, now seen corresponding path program 1 times [2021-12-07 00:32:52,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:32:52,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489783654] [2021-12-07 00:32:52,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:32:52,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:32:52,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:32:52,131 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:32:52,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-07 00:32:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:32:52,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-07 00:32:52,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:32:52,212 INFO L388 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 [2021-12-07 00:32:52,216 INFO L388 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 [2021-12-07 00:32:52,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:32:52,354 INFO L388 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 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 00:32:52,362 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:32:52,362 INFO L388 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 21 treesize of output 21 [2021-12-07 00:32:52,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:32:52,509 INFO L388 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 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 00:32:52,516 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:32:52,516 INFO L388 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 21 treesize of output 21 [2021-12-07 00:32:52,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:32:52,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:32:52,774 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:32:52,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489783654] [2021-12-07 00:32:52,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489783654] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:32:52,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1455700317] [2021-12-07 00:32:52,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:32:52,775 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 00:32:52,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 00:32:52,776 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 00:32:52,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-12-07 00:32:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:32:52,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-07 00:32:52,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:32:52,884 INFO L388 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 [2021-12-07 00:32:52,891 INFO L388 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 [2021-12-07 00:32:52,994 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:32:52,995 INFO L388 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 22 treesize of output 22 [2021-12-07 00:32:53,001 INFO L388 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 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 00:32:53,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:32:53,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-07 00:32:53,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:32:53,168 INFO L388 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 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 00:32:53,176 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:32:53,177 INFO L388 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 22 treesize of output 22 [2021-12-07 00:32:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:32:53,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:32:53,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1455700317] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:32:53,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:32:53,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 11 [2021-12-07 00:32:53,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454155183] [2021-12-07 00:32:53,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:32:53,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 00:32:53,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:32:53,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 00:32:53,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-07 00:32:53,373 INFO L87 Difference]: Start difference. First operand 106 states and 133 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 00:32:55,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:32:55,853 INFO L93 Difference]: Finished difference Result 131 states and 153 transitions. [2021-12-07 00:32:55,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 00:32:55,853 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-12-07 00:32:55,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:32:55,854 INFO L225 Difference]: With dead ends: 131 [2021-12-07 00:32:55,854 INFO L226 Difference]: Without dead ends: 131 [2021-12-07 00:32:55,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=60, Invalid=245, Unknown=1, NotChecked=0, Total=306 [2021-12-07 00:32:55,855 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 51 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:32:55,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 215 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 356 Invalid, 0 Unknown, 58 Unchecked, 0.4s Time] [2021-12-07 00:32:55,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-07 00:32:55,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 90. [2021-12-07 00:32:55,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 59 states have (on average 1.6101694915254237) internal successors, (95), 80 states have internal predecessors, (95), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-07 00:32:55,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 104 transitions. [2021-12-07 00:32:55,858 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 104 transitions. Word has length 27 [2021-12-07 00:32:55,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:32:55,858 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 104 transitions. [2021-12-07 00:32:55,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 00:32:55,859 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 104 transitions. [2021-12-07 00:32:55,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-07 00:32:55,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:32:55,859 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:32:55,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-07 00:32:56,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-12-07 00:32:56,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 00:32:56,261 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:32:56,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:32:56,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1606003645, now seen corresponding path program 1 times [2021-12-07 00:32:56,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:32:56,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807534585] [2021-12-07 00:32:56,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:32:56,264 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:32:56,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:32:56,266 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:32:56,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-07 00:32:56,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:32:56,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-07 00:32:56,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:32:56,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:32:56,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:32:56,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 00:32:56,436 INFO L388 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 [2021-12-07 00:32:56,497 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-07 00:32:56,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 31 [2021-12-07 00:32:56,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:32:56,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 58 [2021-12-07 00:32:56,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 00:32:56,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:32:56,727 INFO L354 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2021-12-07 00:32:56,727 INFO L388 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 78 treesize of output 77 [2021-12-07 00:32:56,783 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:32:56,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807534585] [2021-12-07 00:32:56,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807534585] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:32:56,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [223332631] [2021-12-07 00:32:56,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:32:56,783 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 00:32:56,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 00:32:56,784 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 00:32:56,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-12-07 00:32:56,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:32:56,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-07 00:32:56,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:32:56,897 INFO L388 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 [2021-12-07 00:32:56,985 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:32:56,985 INFO L388 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 20 treesize of output 20 [2021-12-07 00:32:57,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:32:59,080 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_16| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_9| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_16|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_9|) |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_16|))) is different from true [2021-12-07 00:32:59,157 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 00:32:59,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2021-12-07 00:32:59,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-12-07 00:32:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-12-07 00:32:59,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:32:59,244 INFO L354 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2021-12-07 00:32:59,244 INFO L388 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 28 treesize of output 27 [2021-12-07 00:32:59,250 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_264 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_264) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) is different from false [2021-12-07 00:32:59,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [223332631] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:32:59,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:32:59,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-12-07 00:32:59,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500933642] [2021-12-07 00:32:59,257 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:32:59,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-07 00:32:59,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:32:59,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-07 00:32:59,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=492, Unknown=2, NotChecked=90, Total=650 [2021-12-07 00:32:59,258 INFO L87 Difference]: Start difference. First operand 90 states and 104 transitions. Second operand has 22 states, 20 states have (on average 1.75) internal successors, (35), 17 states have internal predecessors, (35), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 00:33:08,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:33:08,260 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2021-12-07 00:33:08,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-07 00:33:08,261 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.75) internal successors, (35), 17 states have internal predecessors, (35), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2021-12-07 00:33:08,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:33:08,262 INFO L225 Difference]: With dead ends: 95 [2021-12-07 00:33:08,262 INFO L226 Difference]: Without dead ends: 95 [2021-12-07 00:33:08,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=211, Invalid=1353, Unknown=4, NotChecked=154, Total=1722 [2021-12-07 00:33:08,263 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 44 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:33:08,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 539 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 418 Invalid, 0 Unknown, 113 Unchecked, 0.4s Time] [2021-12-07 00:33:08,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-07 00:33:08,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2021-12-07 00:33:08,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 59 states have (on average 1.5932203389830508) internal successors, (94), 79 states have internal predecessors, (94), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-07 00:33:08,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2021-12-07 00:33:08,265 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 28 [2021-12-07 00:33:08,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:33:08,266 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2021-12-07 00:33:08,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.75) internal successors, (35), 17 states have internal predecessors, (35), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 00:33:08,266 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2021-12-07 00:33:08,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-07 00:33:08,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:33:08,266 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:33:08,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-07 00:33:08,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-12-07 00:33:08,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 00:33:08,668 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:33:08,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:33:08,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1606003646, now seen corresponding path program 1 times [2021-12-07 00:33:08,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:33:08,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2036900958] [2021-12-07 00:33:08,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:33:08,670 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:33:08,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:33:08,671 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:33:08,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-07 00:33:08,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:33:08,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-07 00:33:08,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:33:08,768 INFO L388 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 [2021-12-07 00:33:08,820 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:33:08,820 INFO L388 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 22 treesize of output 22 [2021-12-07 00:33:08,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:33:08,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:33:09,024 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 00:33:09,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2021-12-07 00:33:09,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-12-07 00:33:09,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-12-07 00:33:09,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-12-07 00:33:09,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:33:09,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:33:09,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:33:09,285 INFO L388 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 50 treesize of output 54 [2021-12-07 00:33:09,391 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_288 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_288) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse1 (bvadd (_ bv4 32) .cse1)))))) (and (or (forall ((v_ArrVal_289 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_289) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (and .cse0 (forall ((v_prenex_1 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_prenex_1) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (_ bv0 32))))) (forall ((v_prenex_1 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_prenex_1) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset|))) .cse0)) is different from false [2021-12-07 00:33:09,425 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:33:09,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2036900958] [2021-12-07 00:33:09,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2036900958] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:33:09,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1949581097] [2021-12-07 00:33:09,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:33:09,425 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 00:33:09,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 00:33:09,426 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 00:33:09,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-12-07 00:33:09,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:33:09,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-07 00:33:09,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:33:09,539 INFO L388 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 [2021-12-07 00:33:09,568 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:33:09,568 INFO L388 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 19 treesize of output 19 [2021-12-07 00:33:09,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:33:09,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:33:09,718 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 00:33:09,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2021-12-07 00:33:09,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-12-07 00:33:09,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-12-07 00:33:09,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-12-07 00:33:09,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:33:09,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:33:09,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:33:09,834 INFO L388 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 50 treesize of output 54 [2021-12-07 00:33:09,974 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_314 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_314) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_prenex_4 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_prenex_4) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset|))) (or (forall ((v_prenex_4 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 32) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_prenex_4) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))) (forall ((v_ArrVal_313 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_313) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))))) is different from false [2021-12-07 00:33:10,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1949581097] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:33:10,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:33:10,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-12-07 00:33:10,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402522685] [2021-12-07 00:33:10,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:33:10,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-07 00:33:10,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:33:10,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-07 00:33:10,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=178, Unknown=2, NotChecked=54, Total=272 [2021-12-07 00:33:10,012 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 00:33:10,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:33:10,638 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2021-12-07 00:33:10,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-07 00:33:10,639 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-12-07 00:33:10,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:33:10,640 INFO L225 Difference]: With dead ends: 105 [2021-12-07 00:33:10,640 INFO L226 Difference]: Without dead ends: 105 [2021-12-07 00:33:10,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=97, Invalid=461, Unknown=2, NotChecked=90, Total=650 [2021-12-07 00:33:10,640 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 94 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:33:10,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 273 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 343 Invalid, 0 Unknown, 21 Unchecked, 0.4s Time] [2021-12-07 00:33:10,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-07 00:33:10,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 88. [2021-12-07 00:33:10,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 59 states have (on average 1.576271186440678) internal successors, (93), 78 states have internal predecessors, (93), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-07 00:33:10,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 102 transitions. [2021-12-07 00:33:10,643 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 102 transitions. Word has length 28 [2021-12-07 00:33:10,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:33:10,643 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 102 transitions. [2021-12-07 00:33:10,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 00:33:10,644 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 102 transitions. [2021-12-07 00:33:10,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-07 00:33:10,644 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:33:10,644 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:33:10,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-12-07 00:33:10,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-12-07 00:33:11,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 00:33:11,046 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:33:11,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:33:11,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1476244126, now seen corresponding path program 1 times [2021-12-07 00:33:11,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:33:11,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1927264445] [2021-12-07 00:33:11,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:33:11,049 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:33:11,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:33:11,050 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:33:11,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-07 00:33:11,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:33:11,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:33:11,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:33:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 00:33:11,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:33:11,171 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:33:11,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1927264445] [2021-12-07 00:33:11,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1927264445] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:33:11,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:33:11,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:33:11,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307003654] [2021-12-07 00:33:11,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:33:11,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:33:11,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:33:11,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:33:11,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:33:11,173 INFO L87 Difference]: Start difference. First operand 88 states and 102 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 00:33:11,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:33:11,285 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2021-12-07 00:33:11,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:33:11,286 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2021-12-07 00:33:11,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:33:11,287 INFO L225 Difference]: With dead ends: 87 [2021-12-07 00:33:11,287 INFO L226 Difference]: Without dead ends: 87 [2021-12-07 00:33:11,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:33:11,287 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 30 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:33:11,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 96 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:33:11,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-07 00:33:11,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-12-07 00:33:11,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 59 states have (on average 1.5593220338983051) internal successors, (92), 77 states have internal predecessors, (92), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-07 00:33:11,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2021-12-07 00:33:11,290 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 30 [2021-12-07 00:33:11,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:33:11,290 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2021-12-07 00:33:11,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 00:33:11,291 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2021-12-07 00:33:11,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-07 00:33:11,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:33:11,291 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:33:11,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-12-07 00:33:11,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:33:11,493 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:33:11,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:33:11,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1476244127, now seen corresponding path program 1 times [2021-12-07 00:33:11,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:33:11,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [525629593] [2021-12-07 00:33:11,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:33:11,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:33:11,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:33:11,498 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:33:11,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-07 00:33:11,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:33:11,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 00:33:11,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:33:11,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 00:33:11,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:33:11,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-07 00:33:11,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 00:33:11,914 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:33:11,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [525629593] [2021-12-07 00:33:11,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [525629593] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:33:11,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:33:11,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-12-07 00:33:11,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666914184] [2021-12-07 00:33:11,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:33:11,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 00:33:11,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:33:11,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 00:33:11,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-07 00:33:11,915 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 00:33:12,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:33:12,274 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2021-12-07 00:33:12,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:33:12,274 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2021-12-07 00:33:12,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:33:12,275 INFO L225 Difference]: With dead ends: 84 [2021-12-07 00:33:12,275 INFO L226 Difference]: Without dead ends: 84 [2021-12-07 00:33:12,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:33:12,275 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 50 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:33:12,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 261 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 00:33:12,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-07 00:33:12,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2021-12-07 00:33:12,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.42) internal successors, (71), 65 states have internal predecessors, (71), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-07 00:33:12,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2021-12-07 00:33:12,278 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 30 [2021-12-07 00:33:12,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:33:12,279 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2021-12-07 00:33:12,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 00:33:12,279 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2021-12-07 00:33:12,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-07 00:33:12,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:33:12,279 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:33:12,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-12-07 00:33:12,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:33:12,481 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:33:12,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:33:12,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1481073420, now seen corresponding path program 1 times [2021-12-07 00:33:12,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:33:12,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [609143388] [2021-12-07 00:33:12,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:33:12,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:33:12,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:33:12,486 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:33:12,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-07 00:33:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:33:12,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-07 00:33:12,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:33:12,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:33:12,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:33:12,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-07 00:33:12,786 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-07 00:33:12,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 21 [2021-12-07 00:33:12,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 00:33:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:33:12,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:33:12,833 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:33:12,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [609143388] [2021-12-07 00:33:12,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [609143388] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:33:12,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:33:12,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-07 00:33:12,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421057582] [2021-12-07 00:33:12,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:33:12,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 00:33:12,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:33:12,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 00:33:12,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-07 00:33:12,834 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 00:33:13,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:33:13,035 INFO L93 Difference]: Finished difference Result 130 states and 139 transitions. [2021-12-07 00:33:13,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-07 00:33:13,035 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2021-12-07 00:33:13,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:33:13,036 INFO L225 Difference]: With dead ends: 130 [2021-12-07 00:33:13,036 INFO L226 Difference]: Without dead ends: 130 [2021-12-07 00:33:13,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-12-07 00:33:13,037 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 74 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:33:13,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 358 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 167 Invalid, 0 Unknown, 23 Unchecked, 0.2s Time] [2021-12-07 00:33:13,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-07 00:33:13,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 84. [2021-12-07 00:33:13,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 58 states have (on average 1.3793103448275863) internal successors, (80), 73 states have internal predecessors, (80), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 00:33:13,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2021-12-07 00:33:13,040 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 31 [2021-12-07 00:33:13,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:33:13,040 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2021-12-07 00:33:13,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 00:33:13,040 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2021-12-07 00:33:13,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-07 00:33:13,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:33:13,041 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:33:13,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-12-07 00:33:13,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:33:13,242 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:33:13,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:33:13,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1481072329, now seen corresponding path program 1 times [2021-12-07 00:33:13,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:33:13,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18003601] [2021-12-07 00:33:13,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:33:13,245 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:33:13,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:33:13,247 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:33:13,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-07 00:33:13,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:33:13,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-07 00:33:13,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:33:13,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-12-07 00:33:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 00:33:13,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:33:13,382 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:33:13,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18003601] [2021-12-07 00:33:13,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18003601] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:33:13,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:33:13,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:33:13,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934758916] [2021-12-07 00:33:13,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:33:13,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:33:13,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:33:13,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:33:13,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:33:13,383 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 00:33:13,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:33:13,598 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2021-12-07 00:33:13,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:33:13,599 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2021-12-07 00:33:13,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:33:13,599 INFO L225 Difference]: With dead ends: 89 [2021-12-07 00:33:13,600 INFO L226 Difference]: Without dead ends: 89 [2021-12-07 00:33:13,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:33:13,600 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 16 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:33:13,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 170 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:33:13,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-07 00:33:13,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2021-12-07 00:33:13,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 58 states have (on average 1.3620689655172413) internal successors, (79), 72 states have internal predecessors, (79), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 00:33:13,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2021-12-07 00:33:13,603 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 31 [2021-12-07 00:33:13,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:33:13,603 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2021-12-07 00:33:13,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 00:33:13,603 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2021-12-07 00:33:13,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-07 00:33:13,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:33:13,603 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:33:13,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-12-07 00:33:13,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:33:13,805 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:33:13,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:33:13,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1481072328, now seen corresponding path program 1 times [2021-12-07 00:33:13,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:33:13,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [82347473] [2021-12-07 00:33:13,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:33:13,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:33:13,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:33:13,810 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:33:13,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-07 00:33:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:33:13,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-07 00:33:13,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:33:14,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-12-07 00:33:14,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-12-07 00:33:14,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 00:33:14,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:33:14,049 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:33:14,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [82347473] [2021-12-07 00:33:14,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [82347473] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:33:14,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:33:14,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:33:14,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671833000] [2021-12-07 00:33:14,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:33:14,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:33:14,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:33:14,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:33:14,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:33:14,050 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 00:33:14,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:33:14,645 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2021-12-07 00:33:14,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:33:14,646 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2021-12-07 00:33:14,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:33:14,646 INFO L225 Difference]: With dead ends: 95 [2021-12-07 00:33:14,646 INFO L226 Difference]: Without dead ends: 95 [2021-12-07 00:33:14,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:33:14,647 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 20 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:33:14,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 185 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 00:33:14,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-07 00:33:14,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 82. [2021-12-07 00:33:14,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 71 states have internal predecessors, (78), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 00:33:14,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2021-12-07 00:33:14,650 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 31 [2021-12-07 00:33:14,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:33:14,650 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2021-12-07 00:33:14,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 00:33:14,650 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2021-12-07 00:33:14,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-07 00:33:14,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:33:14,650 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:33:14,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-07 00:33:14,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:33:14,852 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:33:14,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:33:14,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1677586925, now seen corresponding path program 1 times [2021-12-07 00:33:14,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:33:14,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140255254] [2021-12-07 00:33:14,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:33:14,854 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:33:14,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:33:14,854 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:33:14,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-07 00:33:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:33:14,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-07 00:33:14,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:33:15,009 INFO L388 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 [2021-12-07 00:33:15,056 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:33:15,057 INFO L388 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 20 treesize of output 20 [2021-12-07 00:33:15,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:33:15,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:33:15,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-07 00:33:15,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-07 00:33:15,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 00:33:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:33:15,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:33:15,256 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_432 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_432) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) is different from false [2021-12-07 00:33:15,261 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:33:15,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140255254] [2021-12-07 00:33:15,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2140255254] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:33:15,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [551688789] [2021-12-07 00:33:15,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:33:15,261 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 00:33:15,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 00:33:15,262 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 00:33:15,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-12-07 00:33:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:33:15,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-07 00:33:15,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:33:15,381 INFO L388 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 [2021-12-07 00:33:15,417 INFO L388 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 [2021-12-07 00:33:15,458 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:33:15,458 INFO L388 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 22 treesize of output 22 [2021-12-07 00:33:15,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:33:15,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-07 00:33:17,708 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 00:33:17,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2021-12-07 00:33:17,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-07 00:33:17,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-12-07 00:33:17,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 00:33:17,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:33:17,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:33:17,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-12-07 00:33:18,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [551688789] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:33:18,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:33:18,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 19 [2021-12-07 00:33:18,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473450072] [2021-12-07 00:33:18,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:33:18,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-07 00:33:18,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:33:18,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-07 00:33:18,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=449, Unknown=2, NotChecked=42, Total=552 [2021-12-07 00:33:18,231 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 17 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-07 00:33:23,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:33:23,540 INFO L93 Difference]: Finished difference Result 110 states and 114 transitions. [2021-12-07 00:33:23,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-07 00:33:23,541 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 17 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 31 [2021-12-07 00:33:23,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:33:23,542 INFO L225 Difference]: With dead ends: 110 [2021-12-07 00:33:23,542 INFO L226 Difference]: Without dead ends: 110 [2021-12-07 00:33:23,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=200, Invalid=1208, Unknown=2, NotChecked=72, Total=1482 [2021-12-07 00:33:23,543 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 108 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:33:23,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 462 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 786 Invalid, 0 Unknown, 84 Unchecked, 0.8s Time] [2021-12-07 00:33:23,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-07 00:33:23,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 74. [2021-12-07 00:33:23,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 64 states have internal predecessors, (70), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-07 00:33:23,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2021-12-07 00:33:23,545 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 31 [2021-12-07 00:33:23,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:33:23,545 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2021-12-07 00:33:23,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 17 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-07 00:33:23,546 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2021-12-07 00:33:23,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-07 00:33:23,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:33:23,546 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:33:23,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-12-07 00:33:23,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2021-12-07 00:33:23,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 00:33:23,948 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:33:23,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:33:23,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1331364346, now seen corresponding path program 1 times [2021-12-07 00:33:23,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:33:23,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1291017509] [2021-12-07 00:33:23,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:33:23,950 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:33:23,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:33:23,951 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:33:23,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-07 00:33:24,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:33:24,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-07 00:33:24,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:33:24,043 INFO L388 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 [2021-12-07 00:33:24,088 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:33:24,088 INFO L388 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 27 treesize of output 27 [2021-12-07 00:33:24,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:33:26,152 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_27| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_20| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_27|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_20|) |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_27|))) is different from true [2021-12-07 00:33:28,261 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-07 00:33:28,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2021-12-07 00:33:28,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2021-12-07 00:33:28,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-12-07 00:33:28,349 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-07 00:33:28,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2021-12-07 00:33:28,368 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-07 00:33:28,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:33:28,432 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_476 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base|) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset| |c_ULTIMATE.start_entry_point_#t~ret48#1.base|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_476) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (_ bv0 32)))) is different from false [2021-12-07 00:33:28,463 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_476 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ldv_malloc_#res.base_83| (_ BitVec 32))) (or (= |v_ldv_malloc_#res.base_83| (_ bv0 32)) (not (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base|) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset| |v_ldv_malloc_#res.base_83|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_476) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (_ bv0 32))))) is different from false [2021-12-07 00:33:28,466 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:33:28,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1291017509] [2021-12-07 00:33:28,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1291017509] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:33:28,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1763009117] [2021-12-07 00:33:28,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:33:28,466 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 00:33:28,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 00:33:28,467 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 00:33:28,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-12-07 00:33:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:33:28,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-07 00:33:28,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:33:28,599 INFO L388 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 [2021-12-07 00:33:28,675 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:33:28,675 INFO L388 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 24 treesize of output 24 [2021-12-07 00:33:28,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:33:29,005 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 00:33:29,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-12-07 00:33:29,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-12-07 00:33:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:33:29,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:33:31,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1763009117] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:33:31,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:33:31,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2021-12-07 00:33:31,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734001780] [2021-12-07 00:33:31,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:33:31,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-07 00:33:31,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:33:31,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-07 00:33:31,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=525, Unknown=18, NotChecked=144, Total=756 [2021-12-07 00:33:31,274 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 18 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-07 00:33:32,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:33:32,251 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2021-12-07 00:33:32,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-07 00:33:32,252 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 18 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 32 [2021-12-07 00:33:32,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:33:32,253 INFO L225 Difference]: With dead ends: 91 [2021-12-07 00:33:32,253 INFO L226 Difference]: Without dead ends: 91 [2021-12-07 00:33:32,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=180, Invalid=1213, Unknown=25, NotChecked=222, Total=1640 [2021-12-07 00:33:32,254 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 70 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:33:32,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 399 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 375 Invalid, 0 Unknown, 185 Unchecked, 0.4s Time] [2021-12-07 00:33:32,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-07 00:33:32,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2021-12-07 00:33:32,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 71 states have internal predecessors, (77), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 00:33:32,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2021-12-07 00:33:32,256 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 32 [2021-12-07 00:33:32,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:33:32,257 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2021-12-07 00:33:32,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 18 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-07 00:33:32,257 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2021-12-07 00:33:32,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-07 00:33:32,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:33:32,257 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 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] [2021-12-07 00:33:32,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-12-07 00:33:32,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-12-07 00:33:32,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 00:33:32,659 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:33:32,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:33:32,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1548295403, now seen corresponding path program 1 times [2021-12-07 00:33:32,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:33:32,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295706269] [2021-12-07 00:33:32,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:33:32,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:33:32,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:33:32,663 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:33:32,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-07 00:33:32,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:33:32,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:33:32,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:33:32,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-12-07 00:33:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 00:33:32,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:33:32,828 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:33:32,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [295706269] [2021-12-07 00:33:32,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [295706269] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:33:32,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:33:32,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:33:32,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858286039] [2021-12-07 00:33:32,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:33:32,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:33:32,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:33:32,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:33:32,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:33:32,829 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 00:33:32,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:33:32,965 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2021-12-07 00:33:32,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:33:32,966 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2021-12-07 00:33:32,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:33:32,966 INFO L225 Difference]: With dead ends: 83 [2021-12-07 00:33:32,967 INFO L226 Difference]: Without dead ends: 83 [2021-12-07 00:33:32,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:33:32,967 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 6 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:33:32,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 139 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:33:32,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-07 00:33:32,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-12-07 00:33:32,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 72 states have internal predecessors, (78), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 00:33:32,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2021-12-07 00:33:32,970 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 33 [2021-12-07 00:33:32,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:33:32,970 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2021-12-07 00:33:32,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 00:33:32,970 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2021-12-07 00:33:32,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-07 00:33:32,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:33:32,970 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-07 00:33:32,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-12-07 00:33:33,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:33:33,172 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:33:33,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:33:33,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1617154909, now seen corresponding path program 1 times [2021-12-07 00:33:33,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:33:33,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1454191656] [2021-12-07 00:33:33,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:33:33,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:33:33,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:33:33,175 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:33:33,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-12-07 00:33:33,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:33:33,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-07 00:33:33,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:33:33,416 INFO L388 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 [2021-12-07 00:33:33,460 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:33:33,460 INFO L388 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 24 treesize of output 24 [2021-12-07 00:33:33,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:33:35,531 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_31| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_22| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_31|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_22|) |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_31|))) is different from true [2021-12-07 00:33:35,541 INFO L388 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 [2021-12-07 00:33:39,653 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-07 00:33:39,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2021-12-07 00:33:39,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2021-12-07 00:33:39,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-12-07 00:33:39,799 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-07 00:33:39,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2021-12-07 00:33:41,919 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-07 00:33:41,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 27 [2021-12-07 00:33:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2021-12-07 00:33:41,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:33:42,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 84 [2021-12-07 00:33:42,513 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_542 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ldv_malloc_#res.base_93| (_ BitVec 32))) (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base|) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset| |v_ldv_malloc_#res.base_93|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_542) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) |v_ldv_malloc_#res.base_93|)) is different from false [2021-12-07 00:33:42,516 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:33:42,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1454191656] [2021-12-07 00:33:42,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1454191656] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:33:42,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [987911381] [2021-12-07 00:33:42,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:33:42,516 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 00:33:42,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 00:33:42,517 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 00:33:42,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-12-07 00:33:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:33:42,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-07 00:33:42,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:33:42,705 INFO L388 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 [2021-12-07 00:33:44,857 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:33:44,857 INFO L388 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 24 treesize of output 24 [2021-12-07 00:33:44,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:33:44,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:33:47,025 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_33| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_33| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_33|) (_ bv0 32))))) is different from true [2021-12-07 00:33:47,032 INFO L388 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 [2021-12-07 00:33:55,226 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-07 00:33:55,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2021-12-07 00:33:55,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-12-07 00:33:55,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-12-07 00:33:55,509 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-07 00:33:55,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-12-07 00:33:57,630 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 00:33:57,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 37 [2021-12-07 00:33:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2021-12-07 00:33:57,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:33:57,933 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_574 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base|) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset| |c_ULTIMATE.start_entry_point_#t~ret48#1.base|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_574) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))))))))))))) (_ bv1 1)))) is different from false [2021-12-07 00:33:57,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 88 [2021-12-07 00:33:57,963 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_574 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ldv_malloc_#res.base_100| (_ BitVec 32))) (= |v_ldv_malloc_#res.base_100| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base|) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset| |v_ldv_malloc_#res.base_100|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_574) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))) is different from false [2021-12-07 00:33:57,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [987911381] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:33:57,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:33:57,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2021-12-07 00:33:57,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703189326] [2021-12-07 00:33:57,967 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:33:57,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-07 00:33:57,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:33:57,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-07 00:33:57,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1012, Unknown=19, NotChecked=340, Total=1482 [2021-12-07 00:33:57,968 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand has 31 states, 28 states have (on average 1.75) internal successors, (49), 25 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-07 00:34:15,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:34:15,135 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2021-12-07 00:34:15,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-07 00:34:15,136 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.75) internal successors, (49), 25 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 37 [2021-12-07 00:34:15,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:34:15,136 INFO L225 Difference]: With dead ends: 96 [2021-12-07 00:34:15,137 INFO L226 Difference]: Without dead ends: 96 [2021-12-07 00:34:15,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 54 SyntacticMatches, 10 SemanticMatches, 47 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 40.3s TimeCoverageRelationStatistics Valid=212, Invalid=1677, Unknown=23, NotChecked=440, Total=2352 [2021-12-07 00:34:15,138 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 58 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 356 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:34:15,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 534 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 582 Invalid, 0 Unknown, 356 Unchecked, 0.6s Time] [2021-12-07 00:34:15,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-07 00:34:15,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2021-12-07 00:34:15,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 75 states have internal predecessors, (84), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-07 00:34:15,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2021-12-07 00:34:15,140 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 37 [2021-12-07 00:34:15,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:34:15,141 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2021-12-07 00:34:15,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.75) internal successors, (49), 25 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-07 00:34:15,141 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2021-12-07 00:34:15,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-07 00:34:15,141 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:34:15,141 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-07 00:34:15,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-12-07 00:34:15,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2021-12-07 00:34:15,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 00:34:15,543 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:34:15,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:34:15,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1617154908, now seen corresponding path program 1 times [2021-12-07 00:34:15,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:34:15,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1871861296] [2021-12-07 00:34:15,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:34:15,546 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:34:15,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:34:15,548 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:34:15,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-12-07 00:34:15,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:34:15,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-07 00:34:15,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:34:15,682 INFO L388 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 [2021-12-07 00:34:15,724 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:34:15,724 INFO L388 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 21 treesize of output 21 [2021-12-07 00:34:15,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:34:17,793 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_25| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_35| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_35| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_35|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_25|)))) is different from true [2021-12-07 00:34:19,832 INFO L388 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 [2021-12-07 00:34:21,985 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-07 00:34:21,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2021-12-07 00:34:21,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2021-12-07 00:34:22,189 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-07 00:34:22,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 38 [2021-12-07 00:34:22,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2021-12-07 00:34:28,411 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 00:34:28,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 00:34:28,445 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 15 refuted. 1 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-07 00:34:28,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:34:28,840 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:34:28,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1871861296] [2021-12-07 00:34:28,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1871861296] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:34:28,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1827101497] [2021-12-07 00:34:28,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:34:28,841 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 00:34:28,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 00:34:28,842 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 00:34:28,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-12-07 00:34:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:34:29,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-07 00:34:29,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:34:29,022 INFO L388 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 [2021-12-07 00:34:29,239 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:34:29,239 INFO L388 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 19 treesize of output 19 [2021-12-07 00:34:29,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:34:29,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:34:31,683 INFO L388 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 [2021-12-07 00:34:31,687 INFO L388 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 [2021-12-07 00:34:31,988 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-07 00:34:31,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2021-12-07 00:34:31,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 55 [2021-12-07 00:34:32,428 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-12-07 00:34:32,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 46 [2021-12-07 00:34:32,441 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-07 00:34:32,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-12-07 00:34:38,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:34:38,850 INFO L388 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 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 00:34:38,858 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:34:38,858 INFO L388 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 21 treesize of output 21 [2021-12-07 00:34:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:34:38,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:34:45,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1827101497] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:34:45,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:34:45,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2021-12-07 00:34:45,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862791642] [2021-12-07 00:34:45,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:34:45,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-07 00:34:45,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:34:45,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-07 00:34:45,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1429, Unknown=11, NotChecked=76, Total=1640 [2021-12-07 00:34:45,208 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand has 38 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 29 states have internal predecessors, (53), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-07 00:34:56,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:34:56,593 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2021-12-07 00:34:56,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-07 00:34:56,594 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 29 states have internal predecessors, (53), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 37 [2021-12-07 00:34:56,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:34:56,595 INFO L225 Difference]: With dead ends: 90 [2021-12-07 00:34:56,595 INFO L226 Difference]: Without dead ends: 90 [2021-12-07 00:34:56,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 39.3s TimeCoverageRelationStatistics Valid=244, Invalid=2396, Unknown=16, NotChecked=100, Total=2756 [2021-12-07 00:34:56,596 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 64 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 307 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:34:56,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 678 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 557 Invalid, 0 Unknown, 307 Unchecked, 0.6s Time] [2021-12-07 00:34:56,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-07 00:34:56,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2021-12-07 00:34:56,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 75 states have internal predecessors, (82), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-07 00:34:56,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2021-12-07 00:34:56,599 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 37 [2021-12-07 00:34:56,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:34:56,599 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2021-12-07 00:34:56,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 29 states have internal predecessors, (53), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-07 00:34:56,599 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2021-12-07 00:34:56,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-07 00:34:56,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:34:56,600 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 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] [2021-12-07 00:34:56,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-12-07 00:34:56,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2021-12-07 00:34:57,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 00:34:57,001 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:34:57,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:34:57,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1614444768, now seen corresponding path program 1 times [2021-12-07 00:34:57,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:34:57,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272854286] [2021-12-07 00:34:57,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:34:57,004 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:34:57,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:34:57,006 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:34:57,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-12-07 00:34:57,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:34:57,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-07 00:34:57,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:34:57,174 INFO L388 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 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 00:34:57,239 INFO L388 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 0 case distinctions, treesize of input 13 treesize of output 15 [2021-12-07 00:34:57,476 INFO L354 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2021-12-07 00:34:57,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 32 [2021-12-07 00:34:57,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-12-07 00:34:57,596 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-12-07 00:34:57,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 44 [2021-12-07 00:34:57,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 00:34:57,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:34:57,887 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:34:57,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 48 [2021-12-07 00:34:57,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-12-07 00:34:58,124 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:34:58,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272854286] [2021-12-07 00:34:58,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272854286] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:34:58,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1491067745] [2021-12-07 00:34:58,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:34:58,124 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 00:34:58,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 00:34:58,125 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 00:34:58,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-12-07 00:34:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:34:58,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-07 00:34:58,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:34:58,263 INFO L388 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 [2021-12-07 00:34:58,375 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:34:58,375 INFO L388 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 21 treesize of output 21 [2021-12-07 00:34:58,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:34:58,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-07 00:35:02,648 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 00:35:02,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2021-12-07 00:35:02,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-07 00:35:02,757 INFO L388 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 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-07 00:35:02,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:35:02,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:35:02,844 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |c_ULTIMATE.start_entry_point_~a10~0#1.base|))) (_ bv1 1))) (forall ((v_ArrVal_685 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= |c_ULTIMATE.start_entry_point_~a10~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_685) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))))) is different from false [2021-12-07 00:35:02,860 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select |c_#valid| |c_ULTIMATE.start_entry_point_~a10~0#1.base|)))) (_ bv1 1))) (forall ((v_ArrVal_685 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= |c_ULTIMATE.start_entry_point_~a10~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_685) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))))) is different from false [2021-12-07 00:35:02,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1491067745] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:35:02,862 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:35:02,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-12-07 00:35:02,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504080009] [2021-12-07 00:35:02,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:35:02,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-07 00:35:02,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:35:02,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-07 00:35:02,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=806, Unknown=3, NotChecked=118, Total=1056 [2021-12-07 00:35:02,863 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand has 25 states, 24 states have (on average 2.375) internal successors, (57), 22 states have internal predecessors, (57), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 00:35:09,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:35:09,983 INFO L93 Difference]: Finished difference Result 134 states and 137 transitions. [2021-12-07 00:35:09,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-07 00:35:09,984 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 22 states have internal predecessors, (57), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2021-12-07 00:35:09,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:35:09,984 INFO L225 Difference]: With dead ends: 134 [2021-12-07 00:35:09,984 INFO L226 Difference]: Without dead ends: 134 [2021-12-07 00:35:09,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=299, Invalid=1774, Unknown=5, NotChecked=178, Total=2256 [2021-12-07 00:35:09,985 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 139 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:35:09,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 468 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 595 Invalid, 0 Unknown, 131 Unchecked, 0.6s Time] [2021-12-07 00:35:09,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-07 00:35:09,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 99. [2021-12-07 00:35:09,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 85 states have internal predecessors, (91), 5 states have call successors, (5), 5 states have call predecessors, (5), 8 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-07 00:35:09,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2021-12-07 00:35:09,988 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 36 [2021-12-07 00:35:09,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:35:09,988 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2021-12-07 00:35:09,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 22 states have internal predecessors, (57), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 00:35:09,989 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2021-12-07 00:35:09,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-07 00:35:09,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:35:09,989 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2021-12-07 00:35:10,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-12-07 00:35:10,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-12-07 00:35:10,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 00:35:10,391 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:35:10,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:35:10,392 INFO L85 PathProgramCache]: Analyzing trace with hash -2127689086, now seen corresponding path program 1 times [2021-12-07 00:35:10,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:35:10,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [471952150] [2021-12-07 00:35:10,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:35:10,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:35:10,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:35:10,395 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:35:10,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-12-07 00:35:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:35:10,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-07 00:35:10,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:35:10,507 INFO L388 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 [2021-12-07 00:35:10,553 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:35:10,553 INFO L388 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 23 treesize of output 23 [2021-12-07 00:35:10,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:35:10,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:35:12,625 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_42| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_31| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_42| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_42|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_31|)))) is different from true [2021-12-07 00:35:14,756 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-07 00:35:14,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2021-12-07 00:35:14,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2021-12-07 00:35:14,877 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-07 00:35:14,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2021-12-07 00:35:14,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2021-12-07 00:35:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-07 00:35:14,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:35:20,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:35:20,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2412 treesize of output 2170 [2021-12-07 00:35:20,131 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-12-07 00:35:20,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 666 treesize of output 516 [2021-12-07 00:35:20,177 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:35:20,177 INFO L388 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 360 treesize of output 360 [2021-12-07 00:35:20,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:35:20,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 393 treesize of output 345 [2021-12-07 00:35:20,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:35:20,524 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 00:35:20,524 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:35:20,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [471952150] [2021-12-07 00:35:20,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [471952150] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:35:20,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:35:20,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-12-07 00:35:20,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752842317] [2021-12-07 00:35:20,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:35:20,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-07 00:35:20,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:35:20,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-07 00:35:20,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=404, Unknown=2, NotChecked=40, Total=506 [2021-12-07 00:35:20,526 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 5 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 00:35:21,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:35:21,513 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2021-12-07 00:35:21,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-07 00:35:21,514 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 5 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 37 [2021-12-07 00:35:21,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:35:21,515 INFO L225 Difference]: With dead ends: 89 [2021-12-07 00:35:21,515 INFO L226 Difference]: Without dead ends: 89 [2021-12-07 00:35:21,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=111, Invalid=703, Unknown=2, NotChecked=54, Total=870 [2021-12-07 00:35:21,515 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 57 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:35:21,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 422 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 358 Invalid, 0 Unknown, 219 Unchecked, 0.7s Time] [2021-12-07 00:35:21,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-07 00:35:21,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2021-12-07 00:35:21,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 75 states have internal predecessors, (77), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 00:35:21,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2021-12-07 00:35:21,518 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 37 [2021-12-07 00:35:21,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:35:21,518 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2021-12-07 00:35:21,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 5 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 00:35:21,518 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2021-12-07 00:35:21,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-07 00:35:21,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:35:21,519 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1] [2021-12-07 00:35:21,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-12-07 00:35:21,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:35:21,719 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:35:21,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:35:21,719 INFO L85 PathProgramCache]: Analyzing trace with hash -998224317, now seen corresponding path program 1 times [2021-12-07 00:35:21,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:35:21,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1640730355] [2021-12-07 00:35:21,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:35:21,720 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:35:21,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:35:21,721 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:35:21,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-12-07 00:35:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:35:21,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-07 00:35:21,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:35:22,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:35:22,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:35:22,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 00:35:22,346 INFO L354 Elim1Store]: treesize reduction 6, result has 50.0 percent of original size [2021-12-07 00:35:22,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 61 [2021-12-07 00:35:24,610 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-07 00:35:24,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 49 [2021-12-07 00:35:25,096 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:35:25,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 51 [2021-12-07 00:35:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:35:41,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:35:42,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2021-12-07 00:35:58,964 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:35:58,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1640730355] [2021-12-07 00:35:58,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1640730355] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:35:58,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [943245185] [2021-12-07 00:35:58,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:35:58,965 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 00:35:58,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 00:35:58,966 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 00:35:58,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-12-07 00:35:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:35:59,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 00:35:59,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:35:59,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:35:59,956 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-12-07 00:35:59,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 58 [2021-12-07 00:36:10,262 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 00:36:10,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 46 [2021-12-07 00:36:10,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-12-07 00:36:19,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:36:19,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:36:19,187 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_768 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store (store |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_768) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) (_ bv0 1)) |c_ULTIMATE.start_entry_point_~a10~0#1.base| (_ bv0 1)) |c_ULTIMATE.start_main_old_#valid#1|)) is different from false [2021-12-07 00:36:19,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [943245185] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:36:19,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:36:19,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 29 [2021-12-07 00:36:19,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021515465] [2021-12-07 00:36:19,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:36:19,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-07 00:36:19,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:36:19,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-07 00:36:19,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1696, Unknown=23, NotChecked=84, Total=1980 [2021-12-07 00:36:19,207 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 25 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 00:36:35,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:36:35,583 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-12-07 00:36:35,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-07 00:36:35,584 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 25 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 38 [2021-12-07 00:36:35,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:36:35,584 INFO L225 Difference]: With dead ends: 88 [2021-12-07 00:36:35,584 INFO L226 Difference]: Without dead ends: 72 [2021-12-07 00:36:35,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 71 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 71.2s TimeCoverageRelationStatistics Valid=300, Invalid=2985, Unknown=25, NotChecked=112, Total=3422 [2021-12-07 00:36:35,586 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 13 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:36:35,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 387 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 313 Unchecked, 0.0s Time] [2021-12-07 00:36:35,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-07 00:36:35,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-12-07 00:36:35,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 50 states have (on average 1.26) internal successors, (63), 62 states have internal predecessors, (63), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-07 00:36:35,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2021-12-07 00:36:35,588 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 38 [2021-12-07 00:36:35,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:36:35,588 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2021-12-07 00:36:35,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 25 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 00:36:35,588 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2021-12-07 00:36:35,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-07 00:36:35,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:36:35,589 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-07 00:36:35,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-12-07 00:36:35,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2021-12-07 00:36:35,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 00:36:35,990 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:36:35,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:36:35,990 INFO L85 PathProgramCache]: Analyzing trace with hash -13706918, now seen corresponding path program 1 times [2021-12-07 00:36:35,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:36:35,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [355408869] [2021-12-07 00:36:35,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:36:35,991 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:36:35,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:36:35,991 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:36:35,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-12-07 00:36:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:36:36,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 00:36:36,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:36:36,115 INFO L388 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 [2021-12-07 00:36:36,185 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-07 00:36:36,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2021-12-07 00:36:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 00:36:36,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:36:36,203 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:36:36,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [355408869] [2021-12-07 00:36:36,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [355408869] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:36:36,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:36:36,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:36:36,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551926953] [2021-12-07 00:36:36,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:36:36,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:36:36,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:36:36,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:36:36,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:36:36,204 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 00:36:36,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:36:36,303 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2021-12-07 00:36:36,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:36:36,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2021-12-07 00:36:36,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:36:36,303 INFO L225 Difference]: With dead ends: 71 [2021-12-07 00:36:36,304 INFO L226 Difference]: Without dead ends: 71 [2021-12-07 00:36:36,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:36:36,304 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 21 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:36:36,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 90 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2021-12-07 00:36:36,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-07 00:36:36,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-12-07 00:36:36,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.24) internal successors, (62), 61 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-07 00:36:36,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-12-07 00:36:36,306 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 40 [2021-12-07 00:36:36,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:36:36,306 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-12-07 00:36:36,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 00:36:36,307 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-12-07 00:36:36,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-07 00:36:36,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:36:36,307 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-07 00:36:36,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2021-12-07 00:36:36,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:36:36,507 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:36:36,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:36:36,508 INFO L85 PathProgramCache]: Analyzing trace with hash -13706917, now seen corresponding path program 1 times [2021-12-07 00:36:36,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:36:36,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779221183] [2021-12-07 00:36:36,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:36:36,508 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:36:36,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:36:36,509 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:36:36,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-12-07 00:36:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:36:36,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-07 00:36:36,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:36:36,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:36:36,844 INFO L388 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 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-07 00:36:36,853 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:36:36,854 INFO L388 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 20 treesize of output 20 [2021-12-07 00:36:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 00:36:36,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:36:37,160 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:36:37,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779221183] [2021-12-07 00:36:37,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779221183] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:36:37,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1840324095] [2021-12-07 00:36:37,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:36:37,161 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 00:36:37,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 00:36:37,162 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 00:36:37,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-12-07 00:36:37,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:36:37,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-07 00:36:37,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:36:37,383 INFO L388 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 [2021-12-07 00:36:37,388 INFO L388 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 [2021-12-07 00:36:37,584 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:36:37,584 INFO L388 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 22 treesize of output 22 [2021-12-07 00:36:37,590 INFO L388 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 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 00:36:37,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:36:37,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-07 00:36:37,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:36:37,819 INFO L388 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 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 00:36:37,827 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:36:37,827 INFO L388 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 25 treesize of output 25 [2021-12-07 00:36:38,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:36:38,090 INFO L388 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 0 case distinctions, treesize of input 19 treesize of output 19 [2021-12-07 00:36:38,102 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:36:38,103 INFO L388 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 19 treesize of output 19 [2021-12-07 00:36:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 00:36:38,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:36:40,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1840324095] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:36:40,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:36:40,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13] total 18 [2021-12-07 00:36:40,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764023241] [2021-12-07 00:36:40,461 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:36:40,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-07 00:36:40,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:36:40,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-07 00:36:40,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-12-07 00:36:40,462 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-07 00:36:41,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:36:41,211 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-12-07 00:36:41,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 00:36:41,212 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 40 [2021-12-07 00:36:41,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:36:41,213 INFO L225 Difference]: With dead ends: 70 [2021-12-07 00:36:41,213 INFO L226 Difference]: Without dead ends: 70 [2021-12-07 00:36:41,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-12-07 00:36:41,213 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 119 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:36:41,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 240 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 331 Invalid, 0 Unknown, 38 Unchecked, 0.5s Time] [2021-12-07 00:36:41,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-07 00:36:41,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2021-12-07 00:36:41,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 55 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 00:36:41,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2021-12-07 00:36:41,216 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 40 [2021-12-07 00:36:41,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:36:41,216 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2021-12-07 00:36:41,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-07 00:36:41,216 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2021-12-07 00:36:41,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-07 00:36:41,216 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:36:41,216 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1] [2021-12-07 00:36:41,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-12-07 00:36:41,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2021-12-07 00:36:41,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 00:36:41,618 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:36:41,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:36:41,619 INFO L85 PathProgramCache]: Analyzing trace with hash -424914424, now seen corresponding path program 1 times [2021-12-07 00:36:41,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:36:41,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1370827934] [2021-12-07 00:36:41,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:36:41,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:36:41,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:36:41,623 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:36:41,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-12-07 00:36:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:36:41,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-07 00:36:41,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:36:41,796 INFO L388 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 [2021-12-07 00:36:41,858 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:36:41,859 INFO L388 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 20 treesize of output 20 [2021-12-07 00:36:41,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:36:41,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:36:48,113 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 00:36:48,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2021-12-07 00:36:48,225 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-07 00:36:48,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2021-12-07 00:36:48,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2021-12-07 00:36:48,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-12-07 00:36:48,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-12-07 00:36:58,959 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-12-07 00:36:58,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 60 [2021-12-07 00:36:59,087 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-12-07 00:36:59,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 56 [2021-12-07 00:36:59,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-07 00:36:59,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-12-07 00:36:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:36:59,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:36:59,314 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_899 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_899) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))))))) is different from false [2021-12-07 00:36:59,352 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ldv_malloc_#res.base_146| (_ BitVec 32)) (v_ArrVal_902 (_ BitVec 1)) (v_ArrVal_899 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ldv_malloc_#res.base_146| v_ArrVal_902) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_899) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_146|)))))) is different from false [2021-12-07 00:36:59,354 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:36:59,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1370827934] [2021-12-07 00:36:59,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1370827934] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:36:59,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [983845136] [2021-12-07 00:36:59,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:36:59,355 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 00:36:59,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 00:36:59,355 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 00:36:59,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-12-07 00:36:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:36:59,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-07 00:36:59,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:36:59,567 INFO L388 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 [2021-12-07 00:36:59,776 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:36:59,776 INFO L388 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 25 treesize of output 25 [2021-12-07 00:36:59,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:36:59,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:37:00,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-12-07 00:37:06,258 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:37:06,259 INFO L388 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 21 treesize of output 21 [2021-12-07 00:37:06,416 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-07 00:37:06,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2021-12-07 00:37:06,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2021-12-07 00:37:06,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-12-07 00:37:06,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-07 00:37:23,322 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-07 00:37:23,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 43 [2021-12-07 00:37:23,476 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-12-07 00:37:23,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 48 [2021-12-07 00:37:23,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-07 00:37:23,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-12-07 00:37:23,603 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:37:23,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:37:23,791 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_938 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ldv_malloc_#res.base_149| (_ BitVec 32)) (v_ArrVal_941 (_ BitVec 1))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ldv_malloc_#res.base_149| v_ArrVal_941) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_938) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_149|)))))) is different from false [2021-12-07 00:37:23,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [983845136] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:37:23,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:37:23,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-12-07 00:37:23,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704474877] [2021-12-07 00:37:23,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:37:23,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-07 00:37:23,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:37:23,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-07 00:37:23,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1482, Unknown=22, NotChecked=240, Total=1892 [2021-12-07 00:37:23,795 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 39 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 33 states have internal predecessors, (62), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-07 00:37:38,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:37:38,849 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2021-12-07 00:37:38,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-07 00:37:38,849 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 33 states have internal predecessors, (62), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 41 [2021-12-07 00:37:38,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:37:38,850 INFO L225 Difference]: With dead ends: 71 [2021-12-07 00:37:38,850 INFO L226 Difference]: Without dead ends: 71 [2021-12-07 00:37:38,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 55.3s TimeCoverageRelationStatistics Valid=260, Invalid=2379, Unknown=25, NotChecked=306, Total=2970 [2021-12-07 00:37:38,851 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 23 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:37:38,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 683 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 282 Invalid, 0 Unknown, 202 Unchecked, 0.3s Time] [2021-12-07 00:37:38,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-07 00:37:38,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-12-07 00:37:38,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 61 states have internal predecessors, (63), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-07 00:37:38,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2021-12-07 00:37:38,853 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 41 [2021-12-07 00:37:38,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:37:38,853 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2021-12-07 00:37:38,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 33 states have internal predecessors, (62), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-07 00:37:38,853 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2021-12-07 00:37:38,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-07 00:37:38,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:37:38,854 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1] [2021-12-07 00:37:38,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-12-07 00:37:39,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2021-12-07 00:37:39,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 00:37:39,255 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:37:39,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:37:39,256 INFO L85 PathProgramCache]: Analyzing trace with hash -424914423, now seen corresponding path program 1 times [2021-12-07 00:37:39,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:37:39,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803924873] [2021-12-07 00:37:39,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:37:39,258 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:37:39,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:37:39,260 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:37:39,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-12-07 00:37:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:37:39,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-07 00:37:39,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:37:39,425 INFO L388 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 [2021-12-07 00:37:39,496 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:37:39,497 INFO L388 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 24 treesize of output 24 [2021-12-07 00:37:39,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:37:39,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:37:39,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-07 00:37:39,740 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:37:39,741 INFO L388 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 19 treesize of output 19 [2021-12-07 00:37:39,849 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-07 00:37:39,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 42 [2021-12-07 00:37:39,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2021-12-07 00:37:40,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-12-07 00:37:40,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-12-07 00:37:44,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:37:44,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-07 00:37:44,878 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-07 00:37:44,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2021-12-07 00:37:45,072 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-12-07 00:37:45,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 75 [2021-12-07 00:37:45,089 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 00:37:45,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 65 [2021-12-07 00:37:45,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-12-07 00:37:45,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-12-07 00:37:45,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-12-07 00:37:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:37:45,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:37:45,593 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_978 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_977 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_978) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_977) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))) (forall ((v_ArrVal_978 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_978) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0))))) is different from false [2021-12-07 00:37:46,095 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:37:46,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803924873] [2021-12-07 00:37:46,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803924873] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:37:46,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [512447469] [2021-12-07 00:37:46,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:37:46,096 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 00:37:46,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 00:37:46,098 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 00:37:46,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2021-12-07 00:37:46,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:37:46,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-07 00:37:46,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:37:46,344 INFO L388 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 [2021-12-07 00:37:46,670 INFO L388 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 [2021-12-07 00:37:48,824 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 00:37:48,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 37 [2021-12-07 00:37:48,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:37:48,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:37:49,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-12-07 00:37:49,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-07 00:37:55,729 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-07 00:37:55,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2021-12-07 00:37:55,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 00:37:55,978 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-07 00:37:55,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 50 [2021-12-07 00:37:55,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 52 [2021-12-07 00:37:57,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-07 00:37:57,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-12-07 00:38:01,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:38:01,646 INFO L388 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 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 00:38:01,663 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-07 00:38:01,664 INFO L388 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 26 treesize of output 26 [2021-12-07 00:38:01,976 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-12-07 00:38:01,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 71 [2021-12-07 00:38:01,994 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 00:38:01,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 61 [2021-12-07 00:38:02,270 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:38:02,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 24 [2021-12-07 00:38:02,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 00:38:02,379 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:38:02,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:38:02,442 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1020 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1021 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1020) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1021) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))) (forall ((v_ArrVal_1020 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1020) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0))))) is different from false [2021-12-07 00:38:05,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [512447469] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:38:05,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:38:05,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 43 [2021-12-07 00:38:05,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579988833] [2021-12-07 00:38:05,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:38:05,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-07 00:38:05,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:38:05,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-07 00:38:05,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2042, Unknown=25, NotChecked=186, Total=2450 [2021-12-07 00:38:05,266 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 44 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 36 states have internal predecessors, (63), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-07 00:38:19,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:38:19,129 INFO L93 Difference]: Finished difference Result 92 states and 91 transitions. [2021-12-07 00:38:19,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-07 00:38:19,130 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 36 states have internal predecessors, (63), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 41 [2021-12-07 00:38:19,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:38:19,130 INFO L225 Difference]: With dead ends: 92 [2021-12-07 00:38:19,131 INFO L226 Difference]: Without dead ends: 92 [2021-12-07 00:38:19,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 36.9s TimeCoverageRelationStatistics Valid=289, Invalid=2882, Unknown=29, NotChecked=222, Total=3422 [2021-12-07 00:38:19,132 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 89 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:38:19,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 519 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 380 Invalid, 0 Unknown, 122 Unchecked, 0.7s Time] [2021-12-07 00:38:19,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-07 00:38:19,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2021-12-07 00:38:19,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 61 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-07 00:38:19,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-12-07 00:38:19,134 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 41 [2021-12-07 00:38:19,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:38:19,134 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-12-07 00:38:19,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 36 states have internal predecessors, (63), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-07 00:38:19,134 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-12-07 00:38:19,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-07 00:38:19,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:38:19,135 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 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, 1, 1] [2021-12-07 00:38:19,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2021-12-07 00:38:19,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (48)] Ended with exit code 0 [2021-12-07 00:38:19,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 00:38:19,536 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:38:19,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:38:19,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1317895911, now seen corresponding path program 1 times [2021-12-07 00:38:19,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:38:19,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1109358914] [2021-12-07 00:38:19,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:19,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:38:19,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:38:19,541 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:38:19,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-12-07 00:38:19,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:38:19,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-07 00:38:19,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:38:19,696 INFO L388 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 [2021-12-07 00:38:19,751 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:38:19,751 INFO L388 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 21 treesize of output 21 [2021-12-07 00:38:19,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:38:19,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:38:19,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-12-07 00:38:27,972 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:38:27,973 INFO L388 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 20 treesize of output 20 [2021-12-07 00:38:28,062 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-07 00:38:28,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2021-12-07 00:38:28,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2021-12-07 00:38:28,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-12-07 00:38:28,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-07 00:38:34,586 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-12-07 00:38:34,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 53 [2021-12-07 00:38:34,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-07 00:38:34,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-12-07 00:38:34,674 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:38:34,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:38:34,864 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1056 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1056) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))))) (_ bv1 1)))) is different from false [2021-12-07 00:38:34,866 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:38:34,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1109358914] [2021-12-07 00:38:34,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1109358914] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:38:34,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1560308277] [2021-12-07 00:38:34,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:38:34,866 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 00:38:34,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 00:38:34,867 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 00:38:34,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2021-12-07 00:38:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:38:35,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-07 00:38:35,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:38:35,062 INFO L388 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 [2021-12-07 00:38:35,235 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:38:35,235 INFO L388 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 26 treesize of output 26 [2021-12-07 00:38:35,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:38:35,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:38:35,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-07 00:38:51,646 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:38:51,646 INFO L388 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 21 treesize of output 21 [2021-12-07 00:38:51,784 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-07 00:38:51,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2021-12-07 00:38:51,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2021-12-07 00:38:52,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-12-07 00:38:52,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-07 00:39:02,694 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-12-07 00:39:02,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 53 [2021-12-07 00:39:02,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-07 00:39:02,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-12-07 00:39:02,832 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:39:02,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:39:02,881 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1089 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1089) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))))) (_ bv1 1)))) is different from false [2021-12-07 00:39:02,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1560308277] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:39:02,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:39:02,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 36 [2021-12-07 00:39:02,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470608286] [2021-12-07 00:39:02,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:39:02,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-07 00:39:02,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:39:02,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-07 00:39:02,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1320, Unknown=23, NotChecked=150, Total=1640 [2021-12-07 00:39:02,995 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 37 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 31 states have internal predecessors, (59), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-07 00:39:12,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:39:12,433 INFO L93 Difference]: Finished difference Result 91 states and 90 transitions. [2021-12-07 00:39:12,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-07 00:39:12,434 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 31 states have internal predecessors, (59), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 41 [2021-12-07 00:39:12,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:39:12,434 INFO L225 Difference]: With dead ends: 91 [2021-12-07 00:39:12,434 INFO L226 Difference]: Without dead ends: 91 [2021-12-07 00:39:12,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 50.8s TimeCoverageRelationStatistics Valid=272, Invalid=2160, Unknown=26, NotChecked=194, Total=2652 [2021-12-07 00:39:12,435 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 118 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:39:12,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 806 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 707 Invalid, 0 Unknown, 249 Unchecked, 0.8s Time] [2021-12-07 00:39:12,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-07 00:39:12,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 70. [2021-12-07 00:39:12,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.196078431372549) internal successors, (61), 60 states have internal predecessors, (61), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-07 00:39:12,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2021-12-07 00:39:12,437 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 41 [2021-12-07 00:39:12,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:39:12,437 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2021-12-07 00:39:12,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 31 states have internal predecessors, (59), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-07 00:39:12,438 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2021-12-07 00:39:12,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-07 00:39:12,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:39:12,438 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 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, 1, 1] [2021-12-07 00:39:12,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-12-07 00:39:12,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2021-12-07 00:39:12,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 00:39:12,840 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:39:12,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:39:12,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1317895912, now seen corresponding path program 1 times [2021-12-07 00:39:12,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:39:12,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1892161928] [2021-12-07 00:39:12,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:39:12,842 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:39:12,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:39:12,842 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:39:12,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-12-07 00:39:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:39:12,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-07 00:39:12,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:39:13,006 INFO L388 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 [2021-12-07 00:39:13,074 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:39:13,074 INFO L388 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 25 treesize of output 25 [2021-12-07 00:39:13,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:39:13,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:39:13,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-07 00:39:13,315 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:39:13,316 INFO L388 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 21 treesize of output 21 [2021-12-07 00:39:13,421 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-07 00:39:13,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 43 [2021-12-07 00:39:13,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 47 [2021-12-07 00:39:13,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-12-07 00:39:14,059 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-12-07 00:39:14,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 75 [2021-12-07 00:39:14,076 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 00:39:14,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 65 [2021-12-07 00:39:14,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-12-07 00:39:14,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-12-07 00:39:14,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-12-07 00:39:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:39:14,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:39:14,486 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1122 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1123 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1123) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1122) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))) (forall ((v_ArrVal_1123 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1123) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0))))) is different from false [2021-12-07 00:39:14,516 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:39:14,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1892161928] [2021-12-07 00:39:14,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1892161928] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:39:14,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1446005167] [2021-12-07 00:39:14,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:39:14,517 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 00:39:14,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 00:39:14,518 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 00:39:14,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2021-12-07 00:39:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:39:14,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-07 00:39:14,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:39:14,730 INFO L388 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 [2021-12-07 00:39:14,923 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:39:14,924 INFO L388 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 29 treesize of output 29 [2021-12-07 00:39:15,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:39:15,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:39:15,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-07 00:39:15,437 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:39:15,437 INFO L388 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 21 treesize of output 21 [2021-12-07 00:39:15,602 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-07 00:39:15,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2021-12-07 00:39:15,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2021-12-07 00:39:16,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-12-07 00:39:16,391 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-12-07 00:39:16,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 69 [2021-12-07 00:39:16,406 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 00:39:16,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 65 [2021-12-07 00:39:16,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-12-07 00:39:16,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-12-07 00:39:16,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-12-07 00:39:16,561 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:39:16,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:39:16,628 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1156 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1156) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_1156 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1157 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1156) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1157) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))))) is different from false [2021-12-07 00:39:16,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1446005167] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:39:16,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:39:16,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 34 [2021-12-07 00:39:16,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080116190] [2021-12-07 00:39:16,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:39:16,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-07 00:39:16,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:39:16,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-07 00:39:16,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1216, Unknown=2, NotChecked=142, Total=1482 [2021-12-07 00:39:16,657 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand has 35 states, 32 states have (on average 1.84375) internal successors, (59), 29 states have internal predecessors, (59), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-07 00:39:18,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:39:18,620 INFO L93 Difference]: Finished difference Result 90 states and 89 transitions. [2021-12-07 00:39:18,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-07 00:39:18,620 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.84375) internal successors, (59), 29 states have internal predecessors, (59), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 41 [2021-12-07 00:39:18,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:39:18,621 INFO L225 Difference]: With dead ends: 90 [2021-12-07 00:39:18,621 INFO L226 Difference]: Without dead ends: 90 [2021-12-07 00:39:18,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=276, Invalid=2180, Unknown=2, NotChecked=194, Total=2652 [2021-12-07 00:39:18,622 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 90 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:39:18,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 926 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 781 Invalid, 0 Unknown, 147 Unchecked, 1.1s Time] [2021-12-07 00:39:18,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-07 00:39:18,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 62. [2021-12-07 00:39:18,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 45 states have (on average 1.2) internal successors, (54), 53 states have internal predecessors, (54), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 00:39:18,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2021-12-07 00:39:18,624 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 41 [2021-12-07 00:39:18,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:39:18,624 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2021-12-07 00:39:18,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.84375) internal successors, (59), 29 states have internal predecessors, (59), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-07 00:39:18,624 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2021-12-07 00:39:18,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-07 00:39:18,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:39:18,625 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1] [2021-12-07 00:39:18,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2021-12-07 00:39:18,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2021-12-07 00:39:19,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 00:39:19,026 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:39:19,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:39:19,028 INFO L85 PathProgramCache]: Analyzing trace with hash -287445220, now seen corresponding path program 1 times [2021-12-07 00:39:19,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:39:19,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [803242062] [2021-12-07 00:39:19,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:39:19,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:39:19,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:39:19,032 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:39:19,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-12-07 00:39:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:39:19,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-07 00:39:19,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:39:19,222 INFO L388 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 [2021-12-07 00:39:19,290 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:39:19,290 INFO L388 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 25 treesize of output 25 [2021-12-07 00:39:19,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:39:19,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:39:19,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-07 00:39:19,548 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:39:19,548 INFO L388 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 23 treesize of output 23 [2021-12-07 00:39:19,658 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-07 00:39:19,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2021-12-07 00:39:19,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-12-07 00:39:20,446 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-12-07 00:39:20,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 96 [2021-12-07 00:39:20,477 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-07 00:39:20,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 68 [2021-12-07 00:39:20,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-12-07 00:39:20,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-12-07 00:39:20,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-12-07 00:39:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:39:20,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:39:20,853 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1193 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|) |c_ULTIMATE.start_alloc_10_#t~mem39#1.offset| |c_ULTIMATE.start_alloc_10_#t~ret40#1.offset|)))) (select (select .cse0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1193) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (_ bv0 32))) is different from false [2021-12-07 00:39:20,878 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1193 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|) |c_ULTIMATE.start_alloc_10_#t~mem39#1.offset| (_ bv0 32))))) (select (select .cse0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1193) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (_ bv0 32))) is different from false [2021-12-07 00:39:20,881 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:39:20,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [803242062] [2021-12-07 00:39:20,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [803242062] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:39:20,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1196336638] [2021-12-07 00:39:20,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:39:20,882 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 00:39:20,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 00:39:20,882 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 00:39:20,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2021-12-07 00:39:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:39:21,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-07 00:39:21,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:39:21,127 INFO L388 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 [2021-12-07 00:39:27,450 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 00:39:27,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 35 [2021-12-07 00:39:27,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:39:27,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:39:27,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-12-07 00:39:30,256 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-07 00:39:30,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-12-07 00:39:30,471 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-07 00:39:30,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-12-07 00:39:30,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 53 [2021-12-07 00:39:31,901 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-12-07 00:39:31,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 77 [2021-12-07 00:39:31,932 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-12-07 00:39:31,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 77 [2021-12-07 00:39:32,015 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:39:32,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 30 [2021-12-07 00:39:32,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-12-07 00:39:32,189 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:39:32,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:39:32,210 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1232 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1233 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 32) (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1233))) (select (select .cse0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1232) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))))) is different from false [2021-12-07 00:39:32,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1196336638] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:39:32,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:39:32,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 38 [2021-12-07 00:39:32,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275921984] [2021-12-07 00:39:32,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:39:32,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-07 00:39:32,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:39:32,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-07 00:39:32,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1482, Unknown=7, NotChecked=240, Total=1892 [2021-12-07 00:39:32,220 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 39 states, 35 states have (on average 1.8) internal successors, (63), 32 states have internal predecessors, (63), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-07 00:39:35,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:39:35,583 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2021-12-07 00:39:35,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-07 00:39:35,583 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 35 states have (on average 1.8) internal successors, (63), 32 states have internal predecessors, (63), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 42 [2021-12-07 00:39:35,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:39:35,583 INFO L225 Difference]: With dead ends: 65 [2021-12-07 00:39:35,583 INFO L226 Difference]: Without dead ends: 65 [2021-12-07 00:39:35,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=276, Invalid=2179, Unknown=7, NotChecked=294, Total=2756 [2021-12-07 00:39:35,585 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 47 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:39:35,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 492 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 271 Invalid, 0 Unknown, 116 Unchecked, 0.4s Time] [2021-12-07 00:39:35,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-07 00:39:35,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2021-12-07 00:39:35,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 52 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 00:39:35,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-12-07 00:39:35,586 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 42 [2021-12-07 00:39:35,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:39:35,587 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-12-07 00:39:35,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 35 states have (on average 1.8) internal successors, (63), 32 states have internal predecessors, (63), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-07 00:39:35,587 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-12-07 00:39:35,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-07 00:39:35,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:39:35,587 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1] [2021-12-07 00:39:35,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (53)] Ended with exit code 0 [2021-12-07 00:39:35,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (54)] Ended with exit code 0 [2021-12-07 00:39:35,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 00:39:35,988 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:39:35,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:39:35,988 INFO L85 PathProgramCache]: Analyzing trace with hash -320867128, now seen corresponding path program 1 times [2021-12-07 00:39:35,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:39:35,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1174624505] [2021-12-07 00:39:35,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:39:35,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:39:35,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:39:35,989 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:39:35,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-12-07 00:39:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:39:36,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-07 00:39:36,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:39:36,151 INFO L388 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 [2021-12-07 00:39:36,234 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 00:39:36,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 39 [2021-12-07 00:39:36,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:39:36,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-12-07 00:39:42,541 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-07 00:39:42,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-12-07 00:39:42,687 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-07 00:39:42,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 36 [2021-12-07 00:39:42,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 60 [2021-12-07 00:39:43,581 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-12-07 00:39:43,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 79 [2021-12-07 00:39:43,598 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 00:39:43,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 69 [2021-12-07 00:39:43,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 43 [2021-12-07 00:39:43,813 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-07 00:39:43,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 22 [2021-12-07 00:39:43,863 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:39:43,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:39:44,092 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1267 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1268 (Array (_ BitVec 32) (_ BitVec 32)))) (bvult (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1268))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1267) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) |c_#StackHeapBarrier|)) is different from false [2021-12-07 00:39:44,100 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:39:44,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1174624505] [2021-12-07 00:39:44,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1174624505] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:39:44,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1454464430] [2021-12-07 00:39:44,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:39:44,101 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 00:39:44,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 00:39:44,102 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 00:39:44,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2021-12-07 00:39:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:39:44,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-07 00:39:44,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:39:44,339 INFO L388 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 [2021-12-07 00:39:44,685 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 00:39:44,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 38 [2021-12-07 00:39:44,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:39:44,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:39:45,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-12-07 00:39:45,718 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-07 00:39:45,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 39 [2021-12-07 00:39:46,310 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-07 00:39:46,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 36 [2021-12-07 00:39:46,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 65 [2021-12-07 00:39:47,793 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-12-07 00:39:47,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 73 [2021-12-07 00:39:47,813 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 00:39:47,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 74 [2021-12-07 00:39:47,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 46 [2021-12-07 00:39:48,085 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:39:48,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 22 [2021-12-07 00:39:48,092 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:39:48,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:39:48,124 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1304 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1305 (Array (_ BitVec 32) (_ BitVec 32)))) (bvult (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1304))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1305) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) |c_#StackHeapBarrier|)) is different from false [2021-12-07 00:39:48,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1454464430] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:39:48,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:39:48,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2021-12-07 00:39:48,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271749064] [2021-12-07 00:39:48,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:39:48,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-07 00:39:48,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:39:48,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-07 00:39:48,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1270, Unknown=3, NotChecked=146, Total=1560 [2021-12-07 00:39:48,135 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 36 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 30 states have internal predecessors, (64), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-07 00:39:53,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:39:53,705 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-12-07 00:39:53,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-07 00:39:53,706 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 30 states have internal predecessors, (64), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 43 [2021-12-07 00:39:53,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:39:53,706 INFO L225 Difference]: With dead ends: 62 [2021-12-07 00:39:53,706 INFO L226 Difference]: Without dead ends: 62 [2021-12-07 00:39:53,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=243, Invalid=1924, Unknown=3, NotChecked=182, Total=2352 [2021-12-07 00:39:53,707 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 35 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:39:53,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 398 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 285 Invalid, 0 Unknown, 156 Unchecked, 0.5s Time] [2021-12-07 00:39:53,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-07 00:39:53,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-12-07 00:39:53,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 51 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 00:39:53,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2021-12-07 00:39:53,709 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 43 [2021-12-07 00:39:53,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:39:53,709 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2021-12-07 00:39:53,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 30 states have internal predecessors, (64), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-07 00:39:53,710 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2021-12-07 00:39:53,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-07 00:39:53,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:39:53,710 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1] [2021-12-07 00:39:53,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (55)] Ended with exit code 0 [2021-12-07 00:39:53,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2021-12-07 00:39:54,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 00:39:54,111 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:39:54,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:39:54,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1356946274, now seen corresponding path program 1 times [2021-12-07 00:39:54,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:39:54,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221297694] [2021-12-07 00:39:54,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:39:54,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:39:54,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:39:54,117 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:39:54,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-12-07 00:39:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:39:54,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-07 00:39:54,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:39:54,297 INFO L388 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 [2021-12-07 00:39:54,370 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:39:54,370 INFO L388 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 24 treesize of output 24 [2021-12-07 00:39:54,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:39:54,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:39:54,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-07 00:39:54,657 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:39:54,657 INFO L388 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 23 treesize of output 23 [2021-12-07 00:39:54,800 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-07 00:39:54,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2021-12-07 00:39:54,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-12-07 00:39:55,309 INFO L388 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 [2021-12-07 00:39:55,652 INFO L354 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2021-12-07 00:39:55,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 81 [2021-12-07 00:39:55,686 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-07 00:39:55,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 80 [2021-12-07 00:39:55,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-12-07 00:39:56,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 104 [2021-12-07 00:39:56,265 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-12-07 00:39:56,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 88 [2021-12-07 00:39:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:39:56,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:39:56,920 INFO L354 Elim1Store]: treesize reduction 5, result has 87.2 percent of original size [2021-12-07 00:39:56,921 INFO L388 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 139 treesize of output 138 [2021-12-07 00:39:56,954 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ldv_malloc_#res.base_182| (_ BitVec 32)) (v_ArrVal_1344 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|) |c_ULTIMATE.start_alloc_10_#t~mem39#1.offset| |v_ldv_malloc_#res.base_182|)))) (select .cse1 (select (select .cse1 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1344) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))) (or (= .cse0 |v_ldv_malloc_#res.base_182|) (= .cse0 |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|)))) is different from false [2021-12-07 00:39:56,957 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:39:56,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221297694] [2021-12-07 00:39:56,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221297694] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:39:56,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1482080215] [2021-12-07 00:39:56,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:39:56,957 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 00:39:56,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 00:39:56,958 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 00:39:56,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2021-12-07 00:39:57,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:39:57,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-07 00:39:57,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:39:57,203 INFO L388 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 [2021-12-07 00:39:59,603 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 00:39:59,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 38 [2021-12-07 00:39:59,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:39:59,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:40:00,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-12-07 00:40:02,388 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-07 00:40:02,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-12-07 00:40:02,681 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-07 00:40:02,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 36 [2021-12-07 00:40:02,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 52 [2021-12-07 00:40:04,343 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-12-07 00:40:04,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 80 [2021-12-07 00:40:04,362 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 00:40:04,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 81 [2021-12-07 00:40:04,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 54 [2021-12-07 00:40:04,844 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:40:04,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 31 [2021-12-07 00:40:04,896 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:40:04,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:40:04,978 INFO L354 Elim1Store]: treesize reduction 5, result has 82.8 percent of original size [2021-12-07 00:40:04,978 INFO L388 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 44 treesize of output 43 [2021-12-07 00:40:04,988 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1382 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1381 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1381))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1382) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|)) is different from false [2021-12-07 00:40:04,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1482080215] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:40:04,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:40:04,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 40 [2021-12-07 00:40:04,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107425501] [2021-12-07 00:40:04,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:40:04,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-07 00:40:04,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:40:04,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-07 00:40:04,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1754, Unknown=4, NotChecked=170, Total=2070 [2021-12-07 00:40:04,997 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 41 states, 37 states have (on average 1.837837837837838) internal successors, (68), 34 states have internal predecessors, (68), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-07 00:40:20,731 WARN L227 SmtUtils]: Spent 6.10s on a formula simplification. DAG size of input: 83 DAG size of output: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:40:22,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:40:22,258 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-12-07 00:40:22,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-07 00:40:22,258 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 37 states have (on average 1.837837837837838) internal successors, (68), 34 states have internal predecessors, (68), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 44 [2021-12-07 00:40:22,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:40:22,258 INFO L225 Difference]: With dead ends: 66 [2021-12-07 00:40:22,258 INFO L226 Difference]: Without dead ends: 66 [2021-12-07 00:40:22,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=311, Invalid=3231, Unknown=6, NotChecked=234, Total=3782 [2021-12-07 00:40:22,259 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 53 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:40:22,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 505 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 363 Invalid, 0 Unknown, 210 Unchecked, 0.6s Time] [2021-12-07 00:40:22,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-07 00:40:22,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2021-12-07 00:40:22,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 50 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 00:40:22,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-12-07 00:40:22,261 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 44 [2021-12-07 00:40:22,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:40:22,261 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-12-07 00:40:22,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 37 states have (on average 1.837837837837838) internal successors, (68), 34 states have internal predecessors, (68), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-07 00:40:22,261 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-12-07 00:40:22,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-07 00:40:22,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:40:22,262 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1] [2021-12-07 00:40:22,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (57)] Ended with exit code 0 [2021-12-07 00:40:22,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (58)] Ended with exit code 0 [2021-12-07 00:40:22,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 00:40:22,663 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:40:22,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:40:22,664 INFO L85 PathProgramCache]: Analyzing trace with hash 884338572, now seen corresponding path program 1 times [2021-12-07 00:40:22,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:40:22,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [499572364] [2021-12-07 00:40:22,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:40:22,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:40:22,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:40:22,668 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:40:22,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-12-07 00:40:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:40:22,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-07 00:40:22,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:40:22,956 INFO L388 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 [2021-12-07 00:40:23,024 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:40:23,024 INFO L388 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 23 treesize of output 23 [2021-12-07 00:40:23,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:40:23,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:40:23,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:40:23,320 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:40:23,320 INFO L388 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 19 treesize of output 19 [2021-12-07 00:40:23,428 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-07 00:40:23,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2021-12-07 00:40:23,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-12-07 00:40:23,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:40:24,159 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 00:40:24,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-12-07 00:40:24,380 INFO L354 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2021-12-07 00:40:24,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 72 [2021-12-07 00:40:24,409 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-07 00:40:24,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 73 [2021-12-07 00:40:24,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-07 00:40:24,441 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-07 00:40:24,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 00:40:24,680 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-07 00:40:24,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2021-12-07 00:40:24,750 INFO L388 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 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 00:40:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:40:24,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:40:25,162 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1422 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ldv_malloc_#res.base_188| (_ BitVec 32)) (v_ArrVal_1426 (_ BitVec 1))) (or (not (= |c_ULTIMATE.start_entry_point_~a10~0#1.base| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|) |c_ULTIMATE.start_alloc_10_#t~mem39#1.offset| |v_ldv_malloc_#res.base_188|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1422) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (select (store |c_#valid| |v_ldv_malloc_#res.base_188| v_ArrVal_1426) |c_ULTIMATE.start_entry_point_~a10~0#1.base|))) (_ bv1 1)))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_188|))))))))) is different from false [2021-12-07 00:40:25,165 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:40:25,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [499572364] [2021-12-07 00:40:25,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [499572364] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:40:25,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1524912381] [2021-12-07 00:40:25,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:40:25,165 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 00:40:25,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 00:40:25,166 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 00:40:25,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2021-12-07 00:40:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:40:25,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-07 00:40:25,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:40:25,431 INFO L388 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 [2021-12-07 00:40:27,753 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 00:40:27,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 37 [2021-12-07 00:40:27,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:40:27,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:40:28,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-12-07 00:40:46,460 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-07 00:40:46,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-12-07 00:40:46,667 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-07 00:40:46,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 36 [2021-12-07 00:40:46,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 47 [2021-12-07 00:40:50,059 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-12-07 00:40:50,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 70 [2021-12-07 00:40:50,077 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 00:40:50,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 56 [2021-12-07 00:40:50,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-12-07 00:40:50,405 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-07 00:40:50,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 19 [2021-12-07 00:40:50,428 INFO L388 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 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-07 00:40:50,436 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:40:50,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:40:50,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:40:50,674 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1463 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1464 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1463))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1464) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) |c_ULTIMATE.start_entry_point_~a10~0#1.base|))) is different from false [2021-12-07 00:40:50,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1524912381] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:40:50,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:40:50,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 39 [2021-12-07 00:40:50,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253749815] [2021-12-07 00:40:50,683 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:40:50,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-07 00:40:50,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:40:50,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-07 00:40:50,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1715, Unknown=12, NotChecked=170, Total=2070 [2021-12-07 00:40:50,684 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 40 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 33 states have internal predecessors, (66), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-07 00:41:11,329 WARN L227 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 47 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:41:23,251 WARN L227 SmtUtils]: Spent 8.09s on a formula simplification. DAG size of input: 84 DAG size of output: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:41:24,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:41:24,295 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-12-07 00:41:24,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-07 00:41:24,296 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 33 states have internal predecessors, (66), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 45 [2021-12-07 00:41:24,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:41:24,296 INFO L225 Difference]: With dead ends: 68 [2021-12-07 00:41:24,296 INFO L226 Difference]: Without dead ends: 68 [2021-12-07 00:41:24,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 63 SyntacticMatches, 8 SemanticMatches, 64 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 58.9s TimeCoverageRelationStatistics Valid=381, Invalid=3641, Unknown=18, NotChecked=250, Total=4290 [2021-12-07 00:41:24,297 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 59 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:41:24,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 500 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 339 Invalid, 0 Unknown, 192 Unchecked, 0.5s Time] [2021-12-07 00:41:24,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-07 00:41:24,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2021-12-07 00:41:24,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 49 states have internal predecessors, (50), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 00:41:24,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2021-12-07 00:41:24,299 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 45 [2021-12-07 00:41:24,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:41:24,299 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2021-12-07 00:41:24,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 33 states have internal predecessors, (66), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-07 00:41:24,299 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2021-12-07 00:41:24,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-07 00:41:24,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:41:24,299 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2021-12-07 00:41:24,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (59)] Ended with exit code 0 [2021-12-07 00:41:24,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (60)] Ended with exit code 0 [2021-12-07 00:41:24,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 00:41:24,701 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:41:24,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:41:24,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1644692002, now seen corresponding path program 1 times [2021-12-07 00:41:24,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:41:24,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845712122] [2021-12-07 00:41:24,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:41:24,704 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:41:24,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:41:24,712 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:41:24,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-12-07 00:41:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:41:25,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-07 00:41:25,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:41:25,097 INFO L388 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 [2021-12-07 00:41:25,176 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:41:25,176 INFO L388 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 21 treesize of output 21 [2021-12-07 00:41:25,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:41:25,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:41:25,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:41:25,484 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:41:25,485 INFO L388 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 21 treesize of output 21 [2021-12-07 00:41:25,590 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-07 00:41:25,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2021-12-07 00:41:25,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2021-12-07 00:41:25,822 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-07 00:41:25,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 15 [2021-12-07 00:41:26,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-07 00:41:26,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 00:41:26,088 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:41:26,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:41:26,114 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1501 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1501) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) is different from false [2021-12-07 00:41:26,121 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:41:26,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845712122] [2021-12-07 00:41:26,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845712122] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:41:26,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1906808704] [2021-12-07 00:41:26,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:41:26,122 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 00:41:26,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 00:41:26,123 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 00:41:26,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2021-12-07 00:41:26,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:41:26,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-07 00:41:26,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:41:26,381 INFO L388 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 [2021-12-07 00:41:26,563 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:41:26,563 INFO L388 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 23 treesize of output 23 [2021-12-07 00:41:26,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:41:26,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:41:26,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-07 00:41:27,008 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:41:27,008 INFO L388 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 19 treesize of output 19 [2021-12-07 00:41:27,153 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-07 00:41:27,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2021-12-07 00:41:27,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2021-12-07 00:41:27,475 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:41:27,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2021-12-07 00:41:27,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-07 00:41:27,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 00:41:27,827 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:41:27,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:41:27,856 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1537 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1537) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) (_ bv0 32))) is different from false [2021-12-07 00:41:27,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1906808704] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:41:27,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:41:27,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 34 [2021-12-07 00:41:27,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060847895] [2021-12-07 00:41:27,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:41:27,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-07 00:41:27,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:41:27,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-07 00:41:27,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1041, Unknown=2, NotChecked=134, Total=1332 [2021-12-07 00:41:27,865 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 35 states, 32 states have (on average 2.15625) internal successors, (69), 29 states have internal predecessors, (69), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-07 00:41:28,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:41:28,978 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2021-12-07 00:41:28,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-07 00:41:28,979 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.15625) internal successors, (69), 29 states have internal predecessors, (69), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 46 [2021-12-07 00:41:28,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:41:28,979 INFO L225 Difference]: With dead ends: 59 [2021-12-07 00:41:28,979 INFO L226 Difference]: Without dead ends: 59 [2021-12-07 00:41:28,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=315, Invalid=1947, Unknown=2, NotChecked=186, Total=2450 [2021-12-07 00:41:28,980 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 71 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:41:28,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 315 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 420 Invalid, 0 Unknown, 93 Unchecked, 0.6s Time] [2021-12-07 00:41:28,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-07 00:41:28,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2021-12-07 00:41:28,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 48 states have internal predecessors, (49), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 00:41:28,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-12-07 00:41:28,982 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 46 [2021-12-07 00:41:28,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:41:28,982 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-12-07 00:41:28,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.15625) internal successors, (69), 29 states have internal predecessors, (69), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-07 00:41:28,982 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-12-07 00:41:28,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-07 00:41:28,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:41:28,984 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:41:28,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (61)] Ended with exit code 0 [2021-12-07 00:41:29,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (62)] Ended with exit code 0 [2021-12-07 00:41:29,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 00:41:29,386 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:41:29,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:41:29,387 INFO L85 PathProgramCache]: Analyzing trace with hash -554155380, now seen corresponding path program 1 times [2021-12-07 00:41:29,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:41:29,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [587964437] [2021-12-07 00:41:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:41:29,389 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:41:29,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:41:29,389 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:41:29,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-12-07 00:41:29,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:41:29,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-07 00:41:29,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:41:29,576 INFO L388 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 [2021-12-07 00:41:29,656 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:41:29,656 INFO L388 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 26 treesize of output 26 [2021-12-07 00:41:29,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:41:29,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-07 00:41:29,995 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:41:29,995 INFO L388 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 20 treesize of output 20 [2021-12-07 00:41:30,138 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-07 00:41:30,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 35 [2021-12-07 00:41:30,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2021-12-07 00:41:30,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-12-07 00:41:30,885 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-12-07 00:41:30,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 47 [2021-12-07 00:41:30,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-07 00:41:31,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-12-07 00:41:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:41:31,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:41:33,370 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:41:33,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [587964437] [2021-12-07 00:41:33,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [587964437] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:41:33,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [250990771] [2021-12-07 00:41:33,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:41:33,370 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 00:41:33,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 00:41:33,371 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 00:41:33,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2021-12-07 00:41:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:41:33,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-07 00:41:33,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:41:33,641 INFO L388 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 [2021-12-07 00:41:33,864 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:41:33,864 INFO L388 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 22 treesize of output 22 [2021-12-07 00:41:33,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:41:33,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:41:34,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:41:34,552 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:41:34,552 INFO L388 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 22 treesize of output 22 [2021-12-07 00:41:34,825 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-07 00:41:34,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 35 [2021-12-07 00:41:34,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2021-12-07 00:41:35,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-12-07 00:41:35,995 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-12-07 00:41:35,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 47 [2021-12-07 00:41:36,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-07 00:41:36,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-12-07 00:41:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:41:36,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:41:36,127 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1607 (Array (_ BitVec 32) (_ BitVec 32)))) (bvult (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1607) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) |c_#StackHeapBarrier|)) is different from false [2021-12-07 00:41:36,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [250990771] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:41:36,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:41:36,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 33 [2021-12-07 00:41:36,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269628830] [2021-12-07 00:41:36,137 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:41:36,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-07 00:41:36,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:41:36,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-07 00:41:36,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1103, Unknown=17, NotChecked=68, Total=1332 [2021-12-07 00:41:36,138 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 34 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 28 states have internal predecessors, (70), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-07 00:41:37,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:41:37,730 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-12-07 00:41:37,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-07 00:41:37,730 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 28 states have internal predecessors, (70), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 47 [2021-12-07 00:41:37,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:41:37,731 INFO L225 Difference]: With dead ends: 58 [2021-12-07 00:41:37,731 INFO L226 Difference]: Without dead ends: 58 [2021-12-07 00:41:37,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=275, Invalid=1874, Unknown=17, NotChecked=90, Total=2256 [2021-12-07 00:41:37,731 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 77 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:41:37,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 316 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 397 Invalid, 0 Unknown, 178 Unchecked, 0.7s Time] [2021-12-07 00:41:37,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-07 00:41:37,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-12-07 00:41:37,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 47 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 00:41:37,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-12-07 00:41:37,733 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 47 [2021-12-07 00:41:37,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:41:37,733 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-12-07 00:41:37,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 28 states have internal predecessors, (70), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-07 00:41:37,734 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-12-07 00:41:37,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-07 00:41:37,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:41:37,734 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:41:37,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (63)] Ended with exit code 0 [2021-12-07 00:41:37,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (64)] Ended with exit code 0 [2021-12-07 00:41:38,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 00:41:38,136 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:41:38,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:41:38,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1052516, now seen corresponding path program 1 times [2021-12-07 00:41:38,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:41:38,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013705660] [2021-12-07 00:41:38,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:41:38,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:41:38,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:41:38,139 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:41:38,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2021-12-07 00:41:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:41:38,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-07 00:41:38,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:41:38,311 INFO L388 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 [2021-12-07 00:41:38,380 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:41:38,380 INFO L388 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 21 treesize of output 21 [2021-12-07 00:41:38,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:41:38,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:41:38,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-07 00:41:38,722 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:41:38,722 INFO L388 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 19 treesize of output 19 [2021-12-07 00:41:38,839 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-07 00:41:38,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 51 [2021-12-07 00:41:38,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-12-07 00:41:39,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-12-07 00:41:39,589 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-07 00:41:39,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 45 [2021-12-07 00:41:39,844 INFO L354 Elim1Store]: treesize reduction 115, result has 18.4 percent of original size [2021-12-07 00:41:39,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 119 treesize of output 85 [2021-12-07 00:41:39,881 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-07 00:41:39,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 75 [2021-12-07 00:41:39,922 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-12-07 00:41:40,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 00:41:40,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2021-12-07 00:41:40,452 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-07 00:41:40,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-07 00:41:40,516 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:41:40,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:41:41,173 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1651 (_ BitVec 1)) (|v_ldv_malloc_#res.base_206| (_ BitVec 32)) (v_ArrVal_1648 (_ BitVec 1)) (v_ArrVal_1645 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|) |c_ULTIMATE.start_alloc_10_#t~mem39#1.offset| |v_ldv_malloc_#res.base_206|)))) (let ((.cse0 (store |c_#valid| |v_ldv_malloc_#res.base_206| v_ArrVal_1651)) (.cse2 (select (select .cse1 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_206|)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select (store .cse0 (select (select .cse1 .cse2) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1645) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) v_ArrVal_1648) .cse2)))))))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse0 .cse2))))))) (_ bv1 1)))))))) is different from false [2021-12-07 00:41:41,176 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:41:41,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013705660] [2021-12-07 00:41:41,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013705660] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:41:41,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1295037873] [2021-12-07 00:41:41,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:41:41,177 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 00:41:41,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 00:41:41,177 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 00:41:41,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2021-12-07 00:41:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:41:41,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-07 00:41:41,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:41:41,442 INFO L388 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 [2021-12-07 00:41:43,812 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 00:41:43,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2021-12-07 00:41:43,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:41:43,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:41:44,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-12-07 00:41:48,593 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-07 00:41:48,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 40 [2021-12-07 00:41:48,841 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-07 00:41:48,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 36 [2021-12-07 00:41:48,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 52 [2021-12-07 00:41:49,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2021-12-07 00:41:52,400 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-12-07 00:41:52,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 40 [2021-12-07 00:41:53,300 INFO L354 Elim1Store]: treesize reduction 28, result has 53.3 percent of original size [2021-12-07 00:41:53,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 56 [2021-12-07 00:41:53,649 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-12-07 00:41:53,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 45 [2021-12-07 00:41:53,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-12-07 00:41:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:41:54,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:41:54,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:41:54,484 INFO L388 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 61 treesize of output 65 [2021-12-07 00:41:54,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-12-07 00:41:54,782 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1688 (Array (_ BitVec 32) (_ BitVec 32)))) (not (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1688))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (= .cse0 (select (select .cse1 .cse0) (_ bv0 32))))))) is different from false [2021-12-07 00:41:54,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1295037873] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:41:54,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:41:54,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 44 [2021-12-07 00:41:54,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339451620] [2021-12-07 00:41:54,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:41:54,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-07 00:41:54,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:41:54,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-07 00:41:54,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2753, Unknown=6, NotChecked=214, Total=3192 [2021-12-07 00:41:54,791 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 45 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 38 states have internal predecessors, (74), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-07 00:42:16,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:42:16,391 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-12-07 00:42:16,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-07 00:42:16,392 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 38 states have internal predecessors, (74), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 48 [2021-12-07 00:42:16,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:42:16,392 INFO L225 Difference]: With dead ends: 68 [2021-12-07 00:42:16,392 INFO L226 Difference]: Without dead ends: 68 [2021-12-07 00:42:16,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 2 IntricatePredicates, 2 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 35.2s TimeCoverageRelationStatistics Valid=475, Invalid=4778, Unknown=11, NotChecked=286, Total=5550 [2021-12-07 00:42:16,393 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 59 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:42:16,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 474 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 287 Invalid, 0 Unknown, 242 Unchecked, 0.4s Time] [2021-12-07 00:42:16,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-07 00:42:16,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2021-12-07 00:42:16,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 46 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 00:42:16,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-12-07 00:42:16,395 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 48 [2021-12-07 00:42:16,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:42:16,395 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-12-07 00:42:16,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 38 states have internal predecessors, (74), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-07 00:42:16,395 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-12-07 00:42:16,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-07 00:42:16,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:42:16,396 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:42:16,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (65)] Ended with exit code 0 [2021-12-07 00:42:16,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (66)] Ended with exit code 0 [2021-12-07 00:42:16,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 00:42:16,797 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:42:16,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:42:16,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1290847345, now seen corresponding path program 1 times [2021-12-07 00:42:16,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:42:16,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218611403] [2021-12-07 00:42:16,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:42:16,801 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:42:16,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:42:16,803 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:42:16,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2021-12-07 00:42:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:42:17,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-07 00:42:17,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:42:17,023 INFO L388 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 [2021-12-07 00:42:17,087 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:42:17,087 INFO L388 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 22 treesize of output 22 [2021-12-07 00:42:17,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:42:17,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-07 00:42:25,325 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:42:25,325 INFO L388 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 21 treesize of output 21 [2021-12-07 00:42:25,425 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-07 00:42:25,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2021-12-07 00:42:25,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2021-12-07 00:42:25,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-12-07 00:42:27,696 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_alloc_10_#t~mem38#1.offset| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_97| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_123| (_ BitVec 32))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_123|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_97|))) (and (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_123| .cse0)) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_123| (select (select |c_#memory_$Pointer$.base| .cse0) |ULTIMATE.start_alloc_10_#t~mem38#1.offset|)))))) is different from true [2021-12-07 00:42:27,862 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-12-07 00:42:27,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 42 [2021-12-07 00:42:27,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-07 00:42:27,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-07 00:42:27,988 INFO L388 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 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 00:42:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2021-12-07 00:42:27,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:42:28,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:42:28,137 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1724 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= |c_ULTIMATE.start_entry_point_~a10~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1724) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))) is different from false [2021-12-07 00:42:28,146 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:42:28,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218611403] [2021-12-07 00:42:28,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218611403] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:42:28,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2113599182] [2021-12-07 00:42:28,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:42:28,147 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 00:42:28,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 00:42:28,147 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 00:42:28,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2021-12-07 00:42:28,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:42:28,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-07 00:42:28,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:42:28,746 INFO L388 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 18 treesize of output 17 [2021-12-07 00:42:28,831 INFO L354 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2021-12-07 00:42:28,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-12-07 00:42:28,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-12-07 00:42:29,032 INFO L354 Elim1Store]: treesize reduction 16, result has 42.9 percent of original size [2021-12-07 00:42:29,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 39 [2021-12-07 00:42:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 00:42:29,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:42:29,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-12-07 00:42:29,509 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-12-07 00:42:29,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2021-12-07 00:42:29,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-07 00:42:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 00:42:29,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2113599182] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:42:29,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:42:29,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 31 [2021-12-07 00:42:29,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926586186] [2021-12-07 00:42:29,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:42:29,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-07 00:42:29,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:42:29,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-07 00:42:29,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=820, Unknown=4, NotChecked=118, Total=1056 [2021-12-07 00:42:29,584 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 32 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 28 states have internal predecessors, (80), 5 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-07 00:42:45,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:42:45,727 INFO L93 Difference]: Finished difference Result 74 states and 73 transitions. [2021-12-07 00:42:45,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-07 00:42:45,727 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 28 states have internal predecessors, (80), 5 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 51 [2021-12-07 00:42:45,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:42:45,728 INFO L225 Difference]: With dead ends: 74 [2021-12-07 00:42:45,728 INFO L226 Difference]: Without dead ends: 74 [2021-12-07 00:42:45,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 132 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=466, Invalid=3315, Unknown=9, NotChecked=242, Total=4032 [2021-12-07 00:42:45,729 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 147 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:42:45,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 327 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 395 Invalid, 0 Unknown, 191 Unchecked, 0.6s Time] [2021-12-07 00:42:45,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-07 00:42:45,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 54. [2021-12-07 00:42:45,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 00:42:45,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2021-12-07 00:42:45,730 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2021-12-07 00:42:45,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:42:45,730 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2021-12-07 00:42:45,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 28 states have internal predecessors, (80), 5 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-07 00:42:45,731 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2021-12-07 00:42:45,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-07 00:42:45,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:42:45,731 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:42:45,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2021-12-07 00:42:45,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (68)] Ended with exit code 0 [2021-12-07 00:42:46,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 00:42:46,133 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-07 00:42:46,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:42:46,134 INFO L85 PathProgramCache]: Analyzing trace with hash -741246124, now seen corresponding path program 1 times [2021-12-07 00:42:46,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:42:46,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1364376050] [2021-12-07 00:42:46,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:42:46,136 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:42:46,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:42:46,138 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:42:46,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2021-12-07 00:42:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-07 00:42:46,337 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-07 00:42:46,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-07 00:42:46,483 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-12-07 00:42:46,483 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-07 00:42:46,484 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK (33 of 34 remaining) [2021-12-07 00:42:46,485 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (32 of 34 remaining) [2021-12-07 00:42:46,485 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (31 of 34 remaining) [2021-12-07 00:42:46,485 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (30 of 34 remaining) [2021-12-07 00:42:46,485 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (29 of 34 remaining) [2021-12-07 00:42:46,485 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (28 of 34 remaining) [2021-12-07 00:42:46,485 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (27 of 34 remaining) [2021-12-07 00:42:46,486 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (26 of 34 remaining) [2021-12-07 00:42:46,486 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (25 of 34 remaining) [2021-12-07 00:42:46,486 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (24 of 34 remaining) [2021-12-07 00:42:46,486 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (23 of 34 remaining) [2021-12-07 00:42:46,486 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION (22 of 34 remaining) [2021-12-07 00:42:46,486 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION (21 of 34 remaining) [2021-12-07 00:42:46,486 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION (20 of 34 remaining) [2021-12-07 00:42:46,486 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION (19 of 34 remaining) [2021-12-07 00:42:46,486 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION (18 of 34 remaining) [2021-12-07 00:42:46,486 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION (17 of 34 remaining) [2021-12-07 00:42:46,486 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION (16 of 34 remaining) [2021-12-07 00:42:46,486 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION (15 of 34 remaining) [2021-12-07 00:42:46,486 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION (14 of 34 remaining) [2021-12-07 00:42:46,486 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION (13 of 34 remaining) [2021-12-07 00:42:46,487 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATION (12 of 34 remaining) [2021-12-07 00:42:46,487 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATION (11 of 34 remaining) [2021-12-07 00:42:46,487 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE (10 of 34 remaining) [2021-12-07 00:42:46,487 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE (9 of 34 remaining) [2021-12-07 00:42:46,487 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE (8 of 34 remaining) [2021-12-07 00:42:46,487 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATION (7 of 34 remaining) [2021-12-07 00:42:46,487 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATION (6 of 34 remaining) [2021-12-07 00:42:46,487 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE (5 of 34 remaining) [2021-12-07 00:42:46,487 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE (4 of 34 remaining) [2021-12-07 00:42:46,487 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE (3 of 34 remaining) [2021-12-07 00:42:46,487 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE (2 of 34 remaining) [2021-12-07 00:42:46,488 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE (1 of 34 remaining) [2021-12-07 00:42:46,488 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE (0 of 34 remaining) [2021-12-07 00:42:46,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (69)] Ended with exit code 0 [2021-12-07 00:42:46,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:42:46,693 INFO L732 BasicCegarLoop]: Path program 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:42:46,696 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-07 00:42:46,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 12:42:46 BoogieIcfgContainer [2021-12-07 00:42:46,727 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-07 00:42:46,727 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-07 00:42:46,727 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-07 00:42:46,727 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-07 00:42:46,728 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:32:09" (3/4) ... [2021-12-07 00:42:46,730 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-07 00:42:46,730 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-07 00:42:46,730 INFO L158 Benchmark]: Toolchain (without parser) took 638077.95ms. Allocated memory was 60.8MB in the beginning and 73.4MB in the end (delta: 12.6MB). Free memory was 37.2MB in the beginning and 31.1MB in the end (delta: 6.1MB). Peak memory consumption was 19.0MB. Max. memory is 16.1GB. [2021-12-07 00:42:46,730 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 60.8MB. Free memory is still 42.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 00:42:46,730 INFO L158 Benchmark]: CACSL2BoogieTranslator took 400.05ms. Allocated memory was 60.8MB in the beginning and 73.4MB in the end (delta: 12.6MB). Free memory was 37.1MB in the beginning and 52.7MB in the end (delta: -15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-07 00:42:46,730 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.74ms. Allocated memory is still 73.4MB. Free memory was 52.7MB in the beginning and 50.5MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-07 00:42:46,730 INFO L158 Benchmark]: Boogie Preprocessor took 20.85ms. Allocated memory is still 73.4MB. Free memory was 50.5MB in the beginning and 48.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-07 00:42:46,731 INFO L158 Benchmark]: RCFGBuilder took 385.07ms. Allocated memory is still 73.4MB. Free memory was 48.9MB in the beginning and 33.4MB in the end (delta: 15.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-12-07 00:42:46,731 INFO L158 Benchmark]: TraceAbstraction took 637226.83ms. Allocated memory is still 73.4MB. Free memory was 32.8MB in the beginning and 31.6MB in the end (delta: 1.1MB). Peak memory consumption was 14.8MB. Max. memory is 16.1GB. [2021-12-07 00:42:46,731 INFO L158 Benchmark]: Witness Printer took 2.62ms. Allocated memory is still 73.4MB. Free memory was 31.6MB in the beginning and 31.1MB in the end (delta: 491.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-07 00:42:46,731 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 60.8MB. Free memory is still 42.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 400.05ms. Allocated memory was 60.8MB in the beginning and 73.4MB in the end (delta: 12.6MB). Free memory was 37.1MB in the beginning and 52.7MB in the end (delta: -15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.74ms. Allocated memory is still 73.4MB. Free memory was 52.7MB in the beginning and 50.5MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.85ms. Allocated memory is still 73.4MB. Free memory was 50.5MB in the beginning and 48.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 385.07ms. Allocated memory is still 73.4MB. Free memory was 48.9MB in the beginning and 33.4MB in the end (delta: 15.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 637226.83ms. Allocated memory is still 73.4MB. Free memory was 32.8MB in the beginning and 31.6MB in the end (delta: 1.1MB). Peak memory consumption was 14.8MB. Max. memory is 16.1GB. * Witness Printer took 2.62ms. Allocated memory is still 73.4MB. Free memory was 31.6MB in the beginning and 31.1MB in the end (delta: 491.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 786]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 786. Possible FailurePath: [L569] struct ldv_list_head ldv_global_msg_list = { &(ldv_global_msg_list), &(ldv_global_msg_list) }; VAL [ldv_global_msg_list={1:0}] [L787] CALL entry_point() [L773] CALL, EXPR ldv_malloc(sizeof(struct A10)) VAL [\old(size)=4, ldv_global_msg_list={1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L773] RET, EXPR ldv_malloc(sizeof(struct A10)) VAL [ldv_global_msg_list={1:0}, ldv_malloc(sizeof(struct A10))={2:0}] [L773] struct A10 *a10 = (struct A10 *)ldv_malloc(sizeof(struct A10)); [L774] COND FALSE !(!a10) VAL [a10={2:0}, ldv_global_msg_list={1:0}] [L775] CALL, EXPR ldv_malloc(sizeof(struct B10)) VAL [\old(size)=4, ldv_global_msg_list={1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L775] RET, EXPR ldv_malloc(sizeof(struct B10)) VAL [a10={2:0}, ldv_global_msg_list={1:0}, ldv_malloc(sizeof(struct B10))={4194307:0}] [L775] a10->b = (struct B10 *)ldv_malloc(sizeof(struct B10)) VAL [a10={2:0}, ldv_global_msg_list={1:0}, ldv_malloc(sizeof(struct B10))={4194307:0}] [L776] EXPR a10->b VAL [a10={2:0}, a10->b={4194307:0}, ldv_global_msg_list={1:0}] [L776] COND FALSE !(!a10->b) [L777] EXPR a10->b VAL [a10={2:0}, a10->b={4194307:0}, ldv_global_msg_list={1:0}] [L777] CALL, EXPR ldv_malloc(sizeof(struct C10)) VAL [\old(size)=4, ldv_global_msg_list={1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L777] RET, EXPR ldv_malloc(sizeof(struct C10)) VAL [a10={2:0}, a10->b={4194307:0}, ldv_global_msg_list={1:0}, ldv_malloc(sizeof(struct C10))={5:0}] [L777] a10->b->c = (struct C10 *)ldv_malloc(sizeof(struct C10)) VAL [a10={2:0}, a10->b={4194307:0}, ldv_global_msg_list={1:0}, ldv_malloc(sizeof(struct C10))={5:0}] [L778] EXPR a10->b VAL [a10={2:0}, a10->b={4194307:0}, ldv_global_msg_list={1:0}] [L778] EXPR a10->b->c VAL [a10={2:0}, a10->b={4194307:0}, a10->b->c={5:0}, ldv_global_msg_list={1:0}] [L778] COND FALSE !(!a10->b->c) [L779] CALL alloc_10(a10) [L767] EXPR a->b VAL [a={2:0}, a={2:0}, a->b={4194307:0}, ldv_global_msg_list={1:0}] [L767] EXPR a->b->c VAL [a={2:0}, a={2:0}, a->b={4194307:0}, a->b->c={5:0}, ldv_global_msg_list={1:0}] [L767] CALL, EXPR ldv_malloc(sizeof(int)) VAL [\old(size)=4, ldv_global_msg_list={1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L767] RET, EXPR ldv_malloc(sizeof(int)) VAL [a={2:0}, a={2:0}, a->b={4194307:0}, a->b->c={5:0}, ldv_global_msg_list={1:0}, ldv_malloc(sizeof(int))={3:0}] [L767] a->b->c->p = (int *)ldv_malloc(sizeof(int)) VAL [a={2:0}, a={2:0}, a->b={4194307:0}, a->b->c={5:0}, ldv_global_msg_list={1:0}, ldv_malloc(sizeof(int))={3:0}] [L779] RET alloc_10(a10) [L780] EXPR a10->b VAL [a10={2:0}, a10->b={4194307:0}, ldv_global_msg_list={1:0}] [L780] EXPR a10->b->c VAL [a10={2:0}, a10->b={4194307:0}, a10->b->c={5:0}, ldv_global_msg_list={1:0}] [L780] free(a10->b->c) VAL [a10={2:0}, a10->b={4194307:0}, a10->b->c={5:0}, ldv_global_msg_list={1:0}] [L780] free(a10->b->c) VAL [a10={2:0}, a10->b={4194307:0}, a10->b->c={5:0}, ldv_global_msg_list={1:0}] [L780] free(a10->b->c) [L782] EXPR a10->b VAL [a10={2:0}, a10->b={4194307:0}, ldv_global_msg_list={1:0}] [L782] free(a10->b) VAL [a10={2:0}, a10->b={4194307:0}, ldv_global_msg_list={1:0}] [L782] free(a10->b) VAL [a10={2:0}, a10->b={4194307:0}, ldv_global_msg_list={1:0}] [L782] free(a10->b) [L784] free(a10) VAL [a10={2:0}, ldv_global_msg_list={1:0}] [L784] free(a10) VAL [a10={2:0}, ldv_global_msg_list={1:0}] [L784] free(a10) [L787] RET entry_point() - UnprovableResult [Line: 775]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 775]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 776]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 776]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 777]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 777]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 777]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 777]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 778]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 778]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 778]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 778]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 767]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 767]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 767]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 767]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 767]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 767]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 780]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 780]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 780]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 780]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 780]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 780]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 780]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 782]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 782]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 782]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 782]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 782]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 784]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 784]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 784]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 77 locations, 34 error locations. Started 1 CEGAR loops. OverallTime: 637.1s, OverallIterations: 43, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 225.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2396 SdHoareTripleChecker+Valid, 16.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2379 mSDsluCounter, 15948 SdHoareTripleChecker+Invalid, 14.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 4717 IncrementalHoareTripleChecker+Unchecked, 13866 mSDsCounter, 510 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12433 IncrementalHoareTripleChecker+Invalid, 17660 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 510 mSolverCounterUnsat, 2082 mSDtfsCounter, 12433 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3165 GetRequests, 1830 SyntacticMatches, 114 SemanticMatches, 1221 ConstructedPredicates, 43 IntricatePredicates, 6 DeprecatedPredicates, 13539 ImplicationChecksByTransitivity, 567.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=119occurred in iteration=9, InterpolantAutomatonStates: 684, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 42 MinimizatonAttempts, 558 StatesRemovedByMinimization, 34 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 5.1s SatisfiabilityAnalysisTime, 387.7s InterpolantComputationTime, 2339 NumberOfCodeBlocks, 2339 NumberOfCodeBlocksAsserted, 68 NumberOfCheckSat, 2391 ConstructedInterpolants, 490 QuantifiedInterpolants, 43455 SizeOfPredicates, 744 NumberOfNonLiveVariables, 9647 ConjunctsInSsa, 1927 ConjunctsInUnsatCore, 73 InterpolantComputations, 12 PerfectInterpolantSequences, 625/1180 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-07 00:42:46,938 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-12-07 00:42:46,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c335101-6660-45cf-9909-4d85a569e360/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample