./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.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_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/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_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/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_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/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 28b4a2248017400eafcc33919e1388faa83abd48459a3d9191abc0a1d3b17a56 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 01:48:55,677 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 01:48:55,679 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 01:48:55,711 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 01:48:55,712 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 01:48:55,713 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 01:48:55,715 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 01:48:55,717 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 01:48:55,719 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 01:48:55,721 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 01:48:55,722 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 01:48:55,723 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 01:48:55,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 01:48:55,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 01:48:55,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 01:48:55,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 01:48:55,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 01:48:55,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 01:48:55,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 01:48:55,735 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 01:48:55,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 01:48:55,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 01:48:55,739 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 01:48:55,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 01:48:55,743 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 01:48:55,744 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 01:48:55,744 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 01:48:55,745 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 01:48:55,746 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 01:48:55,747 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 01:48:55,747 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 01:48:55,748 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 01:48:55,749 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 01:48:55,749 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 01:48:55,750 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 01:48:55,751 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 01:48:55,751 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 01:48:55,751 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 01:48:55,751 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 01:48:55,752 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 01:48:55,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 01:48:55,753 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-07 01:48:55,776 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 01:48:55,777 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 01:48:55,777 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 01:48:55,777 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 01:48:55,778 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 01:48:55,778 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 01:48:55,779 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 01:48:55,779 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 01:48:55,779 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 01:48:55,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 01:48:55,779 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 01:48:55,780 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-07 01:48:55,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 01:48:55,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 01:48:55,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 01:48:55,780 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-07 01:48:55,781 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-07 01:48:55,781 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-07 01:48:55,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 01:48:55,781 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-07 01:48:55,781 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 01:48:55,781 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 01:48:55,781 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 01:48:55,782 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 01:48:55,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 01:48:55,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:48:55,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 01:48:55,782 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 01:48:55,782 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 01:48:55,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 01:48:55,783 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 01:48:55,783 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_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 28b4a2248017400eafcc33919e1388faa83abd48459a3d9191abc0a1d3b17a56 [2021-12-07 01:48:55,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 01:48:55,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 01:48:55,991 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 01:48:55,992 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 01:48:55,993 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 01:48:55,994 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i [2021-12-07 01:48:56,037 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/data/21c1817fb/cc8fe9c873f746e89ba226d28975b469/FLAGf64d8c017 [2021-12-07 01:48:56,500 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 01:48:56,501 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i [2021-12-07 01:48:56,515 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/data/21c1817fb/cc8fe9c873f746e89ba226d28975b469/FLAGf64d8c017 [2021-12-07 01:48:57,017 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/data/21c1817fb/cc8fe9c873f746e89ba226d28975b469 [2021-12-07 01:48:57,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 01:48:57,020 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 01:48:57,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 01:48:57,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 01:48:57,024 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 01:48:57,025 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:48:57" (1/1) ... [2021-12-07 01:48:57,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10be34ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:48:57, skipping insertion in model container [2021-12-07 01:48:57,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:48:57" (1/1) ... [2021-12-07 01:48:57,031 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 01:48:57,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:48:57,304 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:48:57,316 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 01:48:57,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4fe94fbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:48:57, skipping insertion in model container [2021-12-07 01:48:57,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 01:48:57,317 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-07 01:48:57,318 INFO L158 Benchmark]: Toolchain (without parser) took 297.07ms. Allocated memory is still 90.2MB. Free memory was 54.3MB in the beginning and 59.8MB in the end (delta: -5.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-07 01:48:57,319 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 90.2MB. Free memory was 64.0MB in the beginning and 63.9MB in the end (delta: 21.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 01:48:57,319 INFO L158 Benchmark]: CACSL2BoogieTranslator took 295.20ms. Allocated memory is still 90.2MB. Free memory was 54.3MB in the beginning and 59.8MB in the end (delta: -5.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-07 01:48:57,320 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 90.2MB. Free memory was 64.0MB in the beginning and 63.9MB in the end (delta: 21.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 295.20ms. Allocated memory is still 90.2MB. Free memory was 54.3MB in the beginning and 59.8MB in the end (delta: -5.5MB). Peak memory consumption was 8.4MB. 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_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/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_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/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_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/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 28b4a2248017400eafcc33919e1388faa83abd48459a3d9191abc0a1d3b17a56 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 01:48:58,622 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 01:48:58,624 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 01:48:58,645 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 01:48:58,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 01:48:58,646 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 01:48:58,648 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 01:48:58,649 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 01:48:58,651 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 01:48:58,652 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 01:48:58,653 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 01:48:58,654 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 01:48:58,654 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 01:48:58,655 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 01:48:58,656 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 01:48:58,657 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 01:48:58,658 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 01:48:58,659 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 01:48:58,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 01:48:58,662 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 01:48:58,664 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 01:48:58,665 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 01:48:58,666 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 01:48:58,667 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 01:48:58,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 01:48:58,670 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 01:48:58,670 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 01:48:58,671 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 01:48:58,671 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 01:48:58,672 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 01:48:58,673 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 01:48:58,673 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 01:48:58,674 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 01:48:58,674 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 01:48:58,675 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 01:48:58,676 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 01:48:58,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 01:48:58,702 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 01:48:58,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 01:48:58,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 01:48:58,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 01:48:58,704 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-07 01:48:58,725 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 01:48:58,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 01:48:58,725 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 01:48:58,725 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 01:48:58,726 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 01:48:58,726 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 01:48:58,726 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 01:48:58,726 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 01:48:58,727 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 01:48:58,727 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 01:48:58,727 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 01:48:58,727 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-07 01:48:58,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 01:48:58,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 01:48:58,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 01:48:58,727 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-07 01:48:58,728 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-07 01:48:58,728 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-07 01:48:58,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 01:48:58,728 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-07 01:48:58,728 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-07 01:48:58,728 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-07 01:48:58,728 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 01:48:58,728 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 01:48:58,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 01:48:58,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 01:48:58,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 01:48:58,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:48:58,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 01:48:58,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 01:48:58,729 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-07 01:48:58,730 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-07 01:48:58,730 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 01:48:58,730 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-07 01:48:58,730 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_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 28b4a2248017400eafcc33919e1388faa83abd48459a3d9191abc0a1d3b17a56 [2021-12-07 01:48:58,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 01:48:58,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 01:48:58,971 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 01:48:58,971 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 01:48:58,972 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 01:48:58,973 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i [2021-12-07 01:48:59,024 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/data/936eb9b2c/3dca4b780a3b4d6e908528192b7a9171/FLAG1882171b0 [2021-12-07 01:48:59,426 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 01:48:59,427 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i [2021-12-07 01:48:59,441 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/data/936eb9b2c/3dca4b780a3b4d6e908528192b7a9171/FLAG1882171b0 [2021-12-07 01:48:59,751 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/data/936eb9b2c/3dca4b780a3b4d6e908528192b7a9171 [2021-12-07 01:48:59,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 01:48:59,755 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 01:48:59,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 01:48:59,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 01:48:59,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 01:48:59,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:48:59" (1/1) ... [2021-12-07 01:48:59,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@96f7fde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:48:59, skipping insertion in model container [2021-12-07 01:48:59,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:48:59" (1/1) ... [2021-12-07 01:48:59,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 01:48:59,795 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:49:00,052 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:49:00,065 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-07 01:49:00,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:49:00,119 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:49:00,125 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 01:49:00,170 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:49:00,205 INFO L208 MainTranslator]: Completed translation [2021-12-07 01:49:00,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:49:00 WrapperNode [2021-12-07 01:49:00,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 01:49:00,206 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 01:49:00,206 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 01:49:00,206 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 01:49:00,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:49:00" (1/1) ... [2021-12-07 01:49:00,232 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:49:00" (1/1) ... [2021-12-07 01:49:00,262 INFO L137 Inliner]: procedures = 179, calls = 145, calls flagged for inlining = 33, calls inlined = 20, statements flattened = 331 [2021-12-07 01:49:00,262 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 01:49:00,263 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 01:49:00,263 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 01:49:00,263 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 01:49:00,269 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:49:00" (1/1) ... [2021-12-07 01:49:00,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:49:00" (1/1) ... [2021-12-07 01:49:00,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:49:00" (1/1) ... [2021-12-07 01:49:00,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:49:00" (1/1) ... [2021-12-07 01:49:00,293 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:49:00" (1/1) ... [2021-12-07 01:49:00,297 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:49:00" (1/1) ... [2021-12-07 01:49:00,305 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:49:00" (1/1) ... [2021-12-07 01:49:00,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 01:49:00,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 01:49:00,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 01:49:00,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 01:49:00,311 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:49:00" (1/1) ... [2021-12-07 01:49:00,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:49:00,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:49:00,337 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 01:49:00,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 01:49:00,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-07 01:49:00,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-07 01:49:00,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-07 01:49:00,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-07 01:49:00,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-07 01:49:00,374 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-07 01:49:00,375 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2021-12-07 01:49:00,375 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2021-12-07 01:49:00,375 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2021-12-07 01:49:00,375 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2021-12-07 01:49:00,375 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-07 01:49:00,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-07 01:49:00,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-12-07 01:49:00,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-12-07 01:49:00,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-07 01:49:00,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 01:49:00,376 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_msg_free [2021-12-07 01:49:00,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_msg_free [2021-12-07 01:49:00,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 01:49:00,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-07 01:49:00,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-12-07 01:49:00,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-07 01:49:00,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-12-07 01:49:00,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 01:49:00,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-07 01:49:00,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-12-07 01:49:00,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-12-07 01:49:00,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 01:49:00,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 01:49:00,530 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 01:49:00,532 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 01:49:00,535 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-07 01:49:01,377 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 01:49:01,386 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 01:49:01,386 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-07 01:49:01,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:49:01 BoogieIcfgContainer [2021-12-07 01:49:01,388 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 01:49:01,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 01:49:01,390 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 01:49:01,393 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 01:49:01,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:48:59" (1/3) ... [2021-12-07 01:49:01,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da5c173 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:49:01, skipping insertion in model container [2021-12-07 01:49:01,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:49:00" (2/3) ... [2021-12-07 01:49:01,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da5c173 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:49:01, skipping insertion in model container [2021-12-07 01:49:01,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:49:01" (3/3) ... [2021-12-07 01:49:01,396 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test12-1.i [2021-12-07 01:49:01,401 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 01:49:01,401 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 124 error locations. [2021-12-07 01:49:01,430 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 01:49:01,436 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 01:49:01,436 INFO L340 AbstractCegarLoop]: Starting to check reachability of 124 error locations. [2021-12-07 01:49:01,451 INFO L276 IsEmpty]: Start isEmpty. Operand has 313 states, 171 states have (on average 1.8654970760233918) internal successors, (319), 294 states have internal predecessors, (319), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-07 01:49:01,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-07 01:49:01,458 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:49:01,459 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:49:01,459 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:49:01,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:49:01,464 INFO L85 PathProgramCache]: Analyzing trace with hash -297378988, now seen corresponding path program 1 times [2021-12-07 01:49:01,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:49:01,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [204161412] [2021-12-07 01:49:01,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:49:01,477 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:49:01,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:49:01,478 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:49:01,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-07 01:49:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:49:01,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 01:49:01,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:49:01,676 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 01:49:01,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:49:01,677 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:49:01,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [204161412] [2021-12-07 01:49:01,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [204161412] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:49:01,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:49:01,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:49:01,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965910178] [2021-12-07 01:49:01,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:49:01,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:49:01,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:49:01,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:49:01,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:49:01,716 INFO L87 Difference]: Start difference. First operand has 313 states, 171 states have (on average 1.8654970760233918) internal successors, (319), 294 states have internal predecessors, (319), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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 01:49:02,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:49:02,443 INFO L93 Difference]: Finished difference Result 412 states and 459 transitions. [2021-12-07 01:49:02,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:49:02,445 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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 01:49:02,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:49:02,458 INFO L225 Difference]: With dead ends: 412 [2021-12-07 01:49:02,459 INFO L226 Difference]: Without dead ends: 408 [2021-12-07 01:49:02,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 01:49:02,463 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 299 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:49:02,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 522 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-07 01:49:02,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-12-07 01:49:02,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 344. [2021-12-07 01:49:02,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 200 states have (on average 1.83) internal successors, (366), 321 states have internal predecessors, (366), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-12-07 01:49:02,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 402 transitions. [2021-12-07 01:49:02,521 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 402 transitions. Word has length 11 [2021-12-07 01:49:02,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:49:02,521 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 402 transitions. [2021-12-07 01:49:02,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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 01:49:02,522 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 402 transitions. [2021-12-07 01:49:02,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-07 01:49:02,523 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:49:02,523 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:49:02,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-07 01:49:02,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:49:02,725 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:49:02,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:49:02,728 INFO L85 PathProgramCache]: Analyzing trace with hash -297378987, now seen corresponding path program 1 times [2021-12-07 01:49:02,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:49:02,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556026437] [2021-12-07 01:49:02,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:49:02,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:49:02,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:49:02,731 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:49:02,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-07 01:49:02,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:49:02,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 01:49:02,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:49:02,884 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 01:49:02,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:49:02,884 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:49:02,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556026437] [2021-12-07 01:49:02,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556026437] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:49:02,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:49:02,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:49:02,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462680220] [2021-12-07 01:49:02,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:49:02,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:49:02,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:49:02,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:49:02,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:49:02,886 INFO L87 Difference]: Start difference. First operand 344 states and 402 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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 01:49:03,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:49:03,559 INFO L93 Difference]: Finished difference Result 476 states and 564 transitions. [2021-12-07 01:49:03,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:49:03,560 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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 01:49:03,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:49:03,563 INFO L225 Difference]: With dead ends: 476 [2021-12-07 01:49:03,563 INFO L226 Difference]: Without dead ends: 476 [2021-12-07 01:49:03,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 01:49:03,564 INFO L933 BasicCegarLoop]: 370 mSDtfsCounter, 131 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:49:03,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 849 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-07 01:49:03,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-12-07 01:49:03,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 407. [2021-12-07 01:49:03,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 256 states have (on average 1.83203125) internal successors, (469), 376 states have internal predecessors, (469), 22 states have call successors, (22), 9 states have call predecessors, (22), 9 states have return successors, (29), 23 states have call predecessors, (29), 22 states have call successors, (29) [2021-12-07 01:49:03,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 520 transitions. [2021-12-07 01:49:03,585 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 520 transitions. Word has length 11 [2021-12-07 01:49:03,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:49:03,585 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 520 transitions. [2021-12-07 01:49:03,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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 01:49:03,585 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 520 transitions. [2021-12-07 01:49:03,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-07 01:49:03,586 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:49:03,586 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:49:03,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-07 01:49:03,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:49:03,788 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:49:03,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:49:03,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1184882668, now seen corresponding path program 1 times [2021-12-07 01:49:03,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:49:03,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944704989] [2021-12-07 01:49:03,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:49:03,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:49:03,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:49:03,796 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:49:03,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-07 01:49:03,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:49:03,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:49:03,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:49:03,928 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 01:49:03,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:49:03,928 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:49:03,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944704989] [2021-12-07 01:49:03,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1944704989] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:49:03,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:49:03,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:49:03,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151570699] [2021-12-07 01:49:03,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:49:03,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:49:03,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:49:03,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:49:03,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:49:03,930 INFO L87 Difference]: Start difference. First operand 407 states and 520 transitions. 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 01:49:04,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:49:04,027 INFO L93 Difference]: Finished difference Result 649 states and 797 transitions. [2021-12-07 01:49:04,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:49:04,028 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 01:49:04,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:49:04,031 INFO L225 Difference]: With dead ends: 649 [2021-12-07 01:49:04,032 INFO L226 Difference]: Without dead ends: 649 [2021-12-07 01:49:04,032 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 01:49:04,033 INFO L933 BasicCegarLoop]: 390 mSDtfsCounter, 259 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 1501 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:49:04,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 1501 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:49:04,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-12-07 01:49:04,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 392. [2021-12-07 01:49:04,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 241 states have (on average 1.8215767634854771) internal successors, (439), 362 states have internal predecessors, (439), 21 states have call successors, (21), 9 states have call predecessors, (21), 10 states have return successors, (34), 22 states have call predecessors, (34), 21 states have call successors, (34) [2021-12-07 01:49:04,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 494 transitions. [2021-12-07 01:49:04,051 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 494 transitions. Word has length 11 [2021-12-07 01:49:04,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:49:04,051 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 494 transitions. [2021-12-07 01:49:04,052 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 01:49:04,052 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 494 transitions. [2021-12-07 01:49:04,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-07 01:49:04,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:49:04,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:49:04,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-07 01:49:04,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:49:04,254 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:49:04,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:49:04,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1981613461, now seen corresponding path program 1 times [2021-12-07 01:49:04,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:49:04,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1223129250] [2021-12-07 01:49:04,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:49:04,259 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:49:04,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:49:04,262 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:49:04,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-07 01:49:04,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:49:04,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 01:49:04,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:49:04,502 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 01:49:04,530 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 01:49:04,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:49:04,530 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:49:04,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1223129250] [2021-12-07 01:49:04,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1223129250] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:49:04,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:49:04,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:49:04,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746138994] [2021-12-07 01:49:04,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:49:04,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:49:04,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:49:04,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:49:04,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:49:04,532 INFO L87 Difference]: Start difference. First operand 392 states and 494 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 01:49:05,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:49:05,481 INFO L93 Difference]: Finished difference Result 436 states and 541 transitions. [2021-12-07 01:49:05,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:49:05,482 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 13 [2021-12-07 01:49:05,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:49:05,484 INFO L225 Difference]: With dead ends: 436 [2021-12-07 01:49:05,485 INFO L226 Difference]: Without dead ends: 436 [2021-12-07 01:49:05,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:49:05,486 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 59 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:49:05,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 1152 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-07 01:49:05,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-12-07 01:49:05,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 404. [2021-12-07 01:49:05,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 250 states have (on average 1.804) internal successors, (451), 372 states have internal predecessors, (451), 21 states have call successors, (21), 11 states have call predecessors, (21), 13 states have return successors, (34), 22 states have call predecessors, (34), 21 states have call successors, (34) [2021-12-07 01:49:05,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 506 transitions. [2021-12-07 01:49:05,500 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 506 transitions. Word has length 13 [2021-12-07 01:49:05,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:49:05,500 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 506 transitions. [2021-12-07 01:49:05,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 01:49:05,500 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 506 transitions. [2021-12-07 01:49:05,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-07 01:49:05,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:49:05,501 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:49:05,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-07 01:49:05,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:49:05,702 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:49:05,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:49:05,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1981613462, now seen corresponding path program 1 times [2021-12-07 01:49:05,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:49:05,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1947129463] [2021-12-07 01:49:05,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:49:05,703 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:49:05,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:49:05,704 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:49:05,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-07 01:49:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:49:05,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-07 01:49:05,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:49:05,911 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 01:49:05,917 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 01:49:05,948 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 01:49:05,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:49:05,948 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:49:05,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1947129463] [2021-12-07 01:49:05,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1947129463] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:49:05,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:49:05,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:49:05,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979896019] [2021-12-07 01:49:05,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:49:05,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:49:05,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:49:05,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:49:05,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:49:05,950 INFO L87 Difference]: Start difference. First operand 404 states and 506 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 01:49:07,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:49:07,217 INFO L93 Difference]: Finished difference Result 424 states and 522 transitions. [2021-12-07 01:49:07,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:49:07,218 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 13 [2021-12-07 01:49:07,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:49:07,221 INFO L225 Difference]: With dead ends: 424 [2021-12-07 01:49:07,221 INFO L226 Difference]: Without dead ends: 424 [2021-12-07 01:49:07,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:49:07,222 INFO L933 BasicCegarLoop]: 349 mSDtfsCounter, 33 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:49:07,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 1292 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-07 01:49:07,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-12-07 01:49:07,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 413. [2021-12-07 01:49:07,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 259 states have (on average 1.7915057915057915) internal successors, (464), 381 states have internal predecessors, (464), 21 states have call successors, (21), 11 states have call predecessors, (21), 13 states have return successors, (34), 22 states have call predecessors, (34), 21 states have call successors, (34) [2021-12-07 01:49:07,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 519 transitions. [2021-12-07 01:49:07,239 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 519 transitions. Word has length 13 [2021-12-07 01:49:07,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:49:07,239 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 519 transitions. [2021-12-07 01:49:07,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 01:49:07,240 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 519 transitions. [2021-12-07 01:49:07,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-07 01:49:07,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:49:07,241 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:49:07,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-07 01:49:07,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:49:07,442 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr86ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:49:07,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:49:07,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1895308392, now seen corresponding path program 1 times [2021-12-07 01:49:07,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:49:07,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1703329403] [2021-12-07 01:49:07,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:49:07,446 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:49:07,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:49:07,448 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:49:07,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-07 01:49:07,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:49:07,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:49:07,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:49:07,611 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 01:49:07,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:49:07,612 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:49:07,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1703329403] [2021-12-07 01:49:07,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1703329403] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:49:07,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:49:07,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:49:07,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497623567] [2021-12-07 01:49:07,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:49:07,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:49:07,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:49:07,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:49:07,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:49:07,614 INFO L87 Difference]: Start difference. First operand 413 states and 519 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 01:49:07,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:49:07,657 INFO L93 Difference]: Finished difference Result 351 states and 397 transitions. [2021-12-07 01:49:07,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:49:07,658 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 17 [2021-12-07 01:49:07,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:49:07,660 INFO L225 Difference]: With dead ends: 351 [2021-12-07 01:49:07,660 INFO L226 Difference]: Without dead ends: 351 [2021-12-07 01:49:07,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 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 01:49:07,660 INFO L933 BasicCegarLoop]: 343 mSDtfsCounter, 10 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1350 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 01:49:07,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1350 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:49:07,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-12-07 01:49:07,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 345. [2021-12-07 01:49:07,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 199 states have (on average 1.7688442211055277) internal successors, (352), 320 states have internal predecessors, (352), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-07 01:49:07,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 387 transitions. [2021-12-07 01:49:07,669 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 387 transitions. Word has length 17 [2021-12-07 01:49:07,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:49:07,669 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 387 transitions. [2021-12-07 01:49:07,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 01:49:07,669 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 387 transitions. [2021-12-07 01:49:07,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-07 01:49:07,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:49:07,670 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:49:07,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-07 01:49:07,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:49:07,871 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr86ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:49:07,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:49:07,871 INFO L85 PathProgramCache]: Analyzing trace with hash -2106255897, now seen corresponding path program 1 times [2021-12-07 01:49:07,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:49:07,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884315629] [2021-12-07 01:49:07,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:49:07,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:49:07,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:49:07,872 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:49:07,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-07 01:49:07,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:49:07,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:49:07,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:49:07,943 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 01:49:07,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:49:07,977 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 01:49:07,978 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:49:07,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884315629] [2021-12-07 01:49:07,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884315629] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:49:07,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:49:07,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-12-07 01:49:07,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950263899] [2021-12-07 01:49:07,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:49:07,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:49:07,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:49:07,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:49:07,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:49:07,979 INFO L87 Difference]: Start difference. First operand 345 states and 387 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 1 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 01:49:08,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:49:08,024 INFO L93 Difference]: Finished difference Result 344 states and 386 transitions. [2021-12-07 01:49:08,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:49:08,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 1 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 17 [2021-12-07 01:49:08,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:49:08,026 INFO L225 Difference]: With dead ends: 344 [2021-12-07 01:49:08,026 INFO L226 Difference]: Without dead ends: 344 [2021-12-07 01:49:08,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 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 01:49:08,027 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 256 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:49:08,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 1060 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:49:08,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-12-07 01:49:08,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2021-12-07 01:49:08,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 199 states have (on average 1.763819095477387) internal successors, (351), 319 states have internal predecessors, (351), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-07 01:49:08,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 386 transitions. [2021-12-07 01:49:08,034 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 386 transitions. Word has length 17 [2021-12-07 01:49:08,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:49:08,034 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 386 transitions. [2021-12-07 01:49:08,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 1 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 01:49:08,035 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 386 transitions. [2021-12-07 01:49:08,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-07 01:49:08,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:49:08,035 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:49:08,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-07 01:49:08,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:49:08,237 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:49:08,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:49:08,238 INFO L85 PathProgramCache]: Analyzing trace with hash -2106256148, now seen corresponding path program 1 times [2021-12-07 01:49:08,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:49:08,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312746229] [2021-12-07 01:49:08,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:49:08,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:49:08,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:49:08,242 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:49:08,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-07 01:49:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:49:08,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:49:08,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:49:08,366 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 01:49:08,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:49:08,367 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:49:08,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312746229] [2021-12-07 01:49:08,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312746229] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:49:08,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:49:08,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:49:08,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813369932] [2021-12-07 01:49:08,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:49:08,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:49:08,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:49:08,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:49:08,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:49:08,368 INFO L87 Difference]: Start difference. First operand 344 states and 386 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 01:49:08,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:49:08,397 INFO L93 Difference]: Finished difference Result 388 states and 436 transitions. [2021-12-07 01:49:08,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:49:08,398 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 17 [2021-12-07 01:49:08,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:49:08,400 INFO L225 Difference]: With dead ends: 388 [2021-12-07 01:49:08,400 INFO L226 Difference]: Without dead ends: 388 [2021-12-07 01:49:08,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 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 01:49:08,400 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 40 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1383 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:49:08,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 1383 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:49:08,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-12-07 01:49:08,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 346. [2021-12-07 01:49:08,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 201 states have (on average 1.756218905472637) internal successors, (353), 320 states have internal predecessors, (353), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-07 01:49:08,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 388 transitions. [2021-12-07 01:49:08,408 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 388 transitions. Word has length 17 [2021-12-07 01:49:08,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:49:08,408 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 388 transitions. [2021-12-07 01:49:08,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 01:49:08,409 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 388 transitions. [2021-12-07 01:49:08,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-07 01:49:08,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:49:08,409 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:49:08,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-07 01:49:08,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:49:08,611 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:49:08,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:49:08,612 INFO L85 PathProgramCache]: Analyzing trace with hash -2134885299, now seen corresponding path program 1 times [2021-12-07 01:49:08,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:49:08,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709271817] [2021-12-07 01:49:08,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:49:08,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:49:08,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:49:08,615 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:49:08,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-07 01:49:08,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:49:08,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 01:49:08,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:49:08,726 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 01:49:08,814 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:49:08,815 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 01:49:08,827 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 01:49:08,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:49:11,000 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 01:49:11,000 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:49:11,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709271817] [2021-12-07 01:49:11,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709271817] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:49:11,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:49:11,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-12-07 01:49:11,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715269699] [2021-12-07 01:49:11,001 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:49:11,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 01:49:11,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:49:11,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 01:49:11,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=40, Unknown=1, NotChecked=0, Total=56 [2021-12-07 01:49:11,002 INFO L87 Difference]: Start difference. First operand 346 states and 388 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 01:49:11,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:49:11,481 INFO L93 Difference]: Finished difference Result 353 states and 399 transitions. [2021-12-07 01:49:11,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:49:11,481 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 17 [2021-12-07 01:49:11,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:49:11,483 INFO L225 Difference]: With dead ends: 353 [2021-12-07 01:49:11,483 INFO L226 Difference]: Without dead ends: 353 [2021-12-07 01:49:11,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=20, Invalid=51, Unknown=1, NotChecked=0, Total=72 [2021-12-07 01:49:11,484 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 20 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:49:11,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 1183 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 416 Invalid, 0 Unknown, 163 Unchecked, 0.4s Time] [2021-12-07 01:49:11,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-12-07 01:49:11,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 350. [2021-12-07 01:49:11,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 205 states have (on average 1.7414634146341463) internal successors, (357), 324 states have internal predecessors, (357), 16 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-07 01:49:11,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 392 transitions. [2021-12-07 01:49:11,492 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 392 transitions. Word has length 17 [2021-12-07 01:49:11,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:49:11,492 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 392 transitions. [2021-12-07 01:49:11,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 01:49:11,493 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 392 transitions. [2021-12-07 01:49:11,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-07 01:49:11,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:49:11,493 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:49:11,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-07 01:49:11,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:49:11,694 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:49:11,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:49:11,694 INFO L85 PathProgramCache]: Analyzing trace with hash -2134885298, now seen corresponding path program 1 times [2021-12-07 01:49:11,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:49:11,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [973002123] [2021-12-07 01:49:11,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:49:11,695 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:49:11,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:49:11,695 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:49:11,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-07 01:49:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:49:11,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-07 01:49:11,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:49:11,762 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 01:49:11,767 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 01:49:11,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:49:11,897 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 01:49:11,905 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:49:11,905 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 01:49:11,933 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 01:49:11,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:49:14,131 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:49:14,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [973002123] [2021-12-07 01:49:14,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [973002123] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:49:14,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [243068700] [2021-12-07 01:49:14,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:49:14,132 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:49:14,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:49:14,133 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:49:14,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-12-07 01:49:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:49:14,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-07 01:49:14,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:49:14,230 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 01:49:14,235 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 01:49:14,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:49:14,328 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 01:49:14,336 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:49:14,337 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 01:49:14,349 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 01:49:14,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:49:17,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [243068700] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:49:17,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:49:17,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-12-07 01:49:17,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009021940] [2021-12-07 01:49:17,448 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:49:17,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 01:49:17,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:49:17,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 01:49:17,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=86, Unknown=1, NotChecked=0, Total=110 [2021-12-07 01:49:17,449 INFO L87 Difference]: Start difference. First operand 350 states and 392 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 01:49:22,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:49:22,097 INFO L93 Difference]: Finished difference Result 634 states and 720 transitions. [2021-12-07 01:49:22,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:49:22,098 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 17 [2021-12-07 01:49:22,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:49:22,100 INFO L225 Difference]: With dead ends: 634 [2021-12-07 01:49:22,101 INFO L226 Difference]: Without dead ends: 634 [2021-12-07 01:49:22,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=32, Invalid=122, Unknown=2, NotChecked=0, Total=156 [2021-12-07 01:49:22,101 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 328 mSDsluCounter, 1099 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 1761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 320 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:49:22,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 1304 Invalid, 1761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1390 Invalid, 0 Unknown, 320 Unchecked, 2.6s Time] [2021-12-07 01:49:22,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-12-07 01:49:22,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 364. [2021-12-07 01:49:22,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 216 states have (on average 1.7222222222222223) internal successors, (372), 335 states have internal predecessors, (372), 18 states have call successors, (18), 9 states have call predecessors, (18), 13 states have return successors, (30), 21 states have call predecessors, (30), 18 states have call successors, (30) [2021-12-07 01:49:22,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 420 transitions. [2021-12-07 01:49:22,111 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 420 transitions. Word has length 17 [2021-12-07 01:49:22,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:49:22,111 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 420 transitions. [2021-12-07 01:49:22,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 01:49:22,111 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 420 transitions. [2021-12-07 01:49:22,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-07 01:49:22,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:49:22,112 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:49:22,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-12-07 01:49:22,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-12-07 01:49:22,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:49:22,514 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr87ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:49:22,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:49:22,515 INFO L85 PathProgramCache]: Analyzing trace with hash -869422937, now seen corresponding path program 1 times [2021-12-07 01:49:22,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:49:22,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1799599066] [2021-12-07 01:49:22,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:49:22,517 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:49:22,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:49:22,520 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:49:22,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-07 01:49:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:49:22,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 01:49:22,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:49:22,722 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 01:49:22,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:49:22,807 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 01:49:22,807 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:49:22,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1799599066] [2021-12-07 01:49:22,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1799599066] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:49:22,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:49:22,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-07 01:49:22,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907088052] [2021-12-07 01:49:22,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:49:22,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 01:49:22,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:49:22,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 01:49:22,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:49:22,808 INFO L87 Difference]: Start difference. First operand 364 states and 420 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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 01:49:23,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:49:23,246 INFO L93 Difference]: Finished difference Result 367 states and 421 transitions. [2021-12-07 01:49:23,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 01:49:23,247 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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 18 [2021-12-07 01:49:23,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:49:23,250 INFO L225 Difference]: With dead ends: 367 [2021-12-07 01:49:23,250 INFO L226 Difference]: Without dead ends: 367 [2021-12-07 01:49:23,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 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 01:49:23,251 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 578 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 1332 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:49:23,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 1332 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 319 Invalid, 0 Unknown, 27 Unchecked, 0.4s Time] [2021-12-07 01:49:23,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-12-07 01:49:23,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 363. [2021-12-07 01:49:23,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 216 states have (on average 1.712962962962963) internal successors, (370), 334 states have internal predecessors, (370), 18 states have call successors, (18), 9 states have call predecessors, (18), 13 states have return successors, (30), 21 states have call predecessors, (30), 18 states have call successors, (30) [2021-12-07 01:49:23,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 418 transitions. [2021-12-07 01:49:23,262 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 418 transitions. Word has length 18 [2021-12-07 01:49:23,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:49:23,262 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 418 transitions. [2021-12-07 01:49:23,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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 01:49:23,263 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 418 transitions. [2021-12-07 01:49:23,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-07 01:49:23,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:49:23,263 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:49:23,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-07 01:49:23,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:49:23,465 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:49:23,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:49:23,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1883109288, now seen corresponding path program 1 times [2021-12-07 01:49:23,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:49:23,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1799878734] [2021-12-07 01:49:23,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:49:23,467 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:49:23,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:49:23,469 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:49:23,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-07 01:49:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:49:23,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:49:23,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:49:23,588 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 01:49:23,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:49:23,588 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:49:23,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1799878734] [2021-12-07 01:49:23,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1799878734] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:49:23,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:49:23,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:49:23,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960500398] [2021-12-07 01:49:23,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:49:23,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:49:23,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:49:23,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:49:23,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:49:23,589 INFO L87 Difference]: Start difference. First operand 363 states and 418 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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 01:49:24,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:49:24,235 INFO L93 Difference]: Finished difference Result 366 states and 420 transitions. [2021-12-07 01:49:24,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:49:24,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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 18 [2021-12-07 01:49:24,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:49:24,238 INFO L225 Difference]: With dead ends: 366 [2021-12-07 01:49:24,238 INFO L226 Difference]: Without dead ends: 353 [2021-12-07 01:49:24,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 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 01:49:24,238 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 41 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:49:24,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 679 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-07 01:49:24,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-12-07 01:49:24,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2021-12-07 01:49:24,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 207 states have (on average 1.7391304347826086) internal successors, (360), 325 states have internal predecessors, (360), 18 states have call successors, (18), 9 states have call predecessors, (18), 12 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2021-12-07 01:49:24,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 407 transitions. [2021-12-07 01:49:24,247 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 407 transitions. Word has length 18 [2021-12-07 01:49:24,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:49:24,247 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 407 transitions. [2021-12-07 01:49:24,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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 01:49:24,247 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 407 transitions. [2021-12-07 01:49:24,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-07 01:49:24,248 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:49:24,248 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:49:24,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-12-07 01:49:24,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:49:24,450 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:49:24,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:49:24,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1969475052, now seen corresponding path program 1 times [2021-12-07 01:49:24,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:49:24,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387548562] [2021-12-07 01:49:24,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:49:24,453 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:49:24,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:49:24,455 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:49:24,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-07 01:49:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:49:24,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-07 01:49:24,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:49:24,595 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:49:24,595 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 23 treesize of output 30 [2021-12-07 01:49:24,727 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 01:49:24,738 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 01:49:24,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:49:24,791 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:49:24,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387548562] [2021-12-07 01:49:24,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1387548562] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:49:24,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [966798883] [2021-12-07 01:49:24,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:49:24,791 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:49:24,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:49:24,792 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:49:24,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-12-07 01:49:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:49:24,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-07 01:49:24,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:49:24,881 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 9 treesize of output 3 [2021-12-07 01:49:24,937 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:49:24,938 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 20 treesize of output 27 [2021-12-07 01:49:25,051 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 17 treesize of output 19 [2021-12-07 01:49:25,063 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 01:49:25,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:49:25,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [966798883] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:49:25,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:49:25,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-12-07 01:49:25,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108791884] [2021-12-07 01:49:25,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:49:25,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:49:25,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:49:25,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:49:25,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:49:25,112 INFO L87 Difference]: Start difference. First operand 353 states and 407 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 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 01:49:25,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:49:25,749 INFO L93 Difference]: Finished difference Result 403 states and 459 transitions. [2021-12-07 01:49:25,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:49:25,751 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 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 21 [2021-12-07 01:49:25,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:49:25,752 INFO L225 Difference]: With dead ends: 403 [2021-12-07 01:49:25,752 INFO L226 Difference]: Without dead ends: 403 [2021-12-07 01:49:25,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:49:25,753 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 63 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:49:25,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 947 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 293 Invalid, 0 Unknown, 237 Unchecked, 0.6s Time] [2021-12-07 01:49:25,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-12-07 01:49:25,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 358. [2021-12-07 01:49:25,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 212 states have (on average 1.7264150943396226) internal successors, (366), 330 states have internal predecessors, (366), 18 states have call successors, (18), 9 states have call predecessors, (18), 12 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2021-12-07 01:49:25,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 413 transitions. [2021-12-07 01:49:25,761 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 413 transitions. Word has length 21 [2021-12-07 01:49:25,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:49:25,761 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 413 transitions. [2021-12-07 01:49:25,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 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 01:49:25,761 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 413 transitions. [2021-12-07 01:49:25,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-07 01:49:25,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:49:25,762 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:49:25,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-07 01:49:25,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-12-07 01:49:26,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:49:26,164 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:49:26,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:49:26,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1969475053, now seen corresponding path program 1 times [2021-12-07 01:49:26,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:49:26,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2147240974] [2021-12-07 01:49:26,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:49:26,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:49:26,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:49:26,168 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:49:26,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-07 01:49:26,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:49:26,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-07 01:49:26,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:49:28,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:49:28,344 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 01:49:30,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:49:30,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:49:32,808 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:49:32,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2147240974] [2021-12-07 01:49:32,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2147240974] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:49:32,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [673713632] [2021-12-07 01:49:32,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:49:32,808 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:49:32,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:49:32,809 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:49:32,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-12-07 01:49:32,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:49:32,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-07 01:49:32,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:49:32,908 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 9 treesize of output 3 [2021-12-07 01:49:34,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:49:34,992 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 01:49:35,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:49:35,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:49:37,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [673713632] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:49:37,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:49:37,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-12-07 01:49:37,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663136155] [2021-12-07 01:49:37,347 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:49:37,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:49:37,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:49:37,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:49:37,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=61, Unknown=2, NotChecked=0, Total=90 [2021-12-07 01:49:37,348 INFO L87 Difference]: Start difference. First operand 358 states and 413 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:49:42,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:49:42,457 INFO L93 Difference]: Finished difference Result 449 states and 506 transitions. [2021-12-07 01:49:42,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:49:42,458 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2021-12-07 01:49:42,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:49:42,460 INFO L225 Difference]: With dead ends: 449 [2021-12-07 01:49:42,460 INFO L226 Difference]: Without dead ends: 449 [2021-12-07 01:49:42,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=60, Invalid=118, Unknown=4, NotChecked=0, Total=182 [2021-12-07 01:49:42,461 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 151 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:49:42,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1095 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 499 Invalid, 0 Unknown, 205 Unchecked, 1.0s Time] [2021-12-07 01:49:42,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-12-07 01:49:42,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 384. [2021-12-07 01:49:42,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 236 states have (on average 1.7415254237288136) internal successors, (411), 354 states have internal predecessors, (411), 19 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (30), 21 states have call predecessors, (30), 19 states have call successors, (30) [2021-12-07 01:49:42,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 460 transitions. [2021-12-07 01:49:42,468 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 460 transitions. Word has length 21 [2021-12-07 01:49:42,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:49:42,468 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 460 transitions. [2021-12-07 01:49:42,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:49:42,468 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 460 transitions. [2021-12-07 01:49:42,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-07 01:49:42,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:49:42,469 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:49:42,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-12-07 01:49:42,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-12-07 01:49:42,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:49:42,871 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:49:42,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:49:42,872 INFO L85 PathProgramCache]: Analyzing trace with hash -2128978739, now seen corresponding path program 1 times [2021-12-07 01:49:42,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:49:42,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1627485614] [2021-12-07 01:49:42,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:49:42,874 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:49:42,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:49:42,875 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:49:42,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-07 01:49:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:49:42,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:49:42,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:49:42,979 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 01:49:42,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:49:42,979 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:49:42,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1627485614] [2021-12-07 01:49:42,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1627485614] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:49:42,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:49:42,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:49:42,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072798418] [2021-12-07 01:49:42,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:49:42,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:49:42,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:49:42,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:49:42,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:49:42,980 INFO L87 Difference]: Start difference. First operand 384 states and 460 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 01:49:43,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:49:43,021 INFO L93 Difference]: Finished difference Result 397 states and 459 transitions. [2021-12-07 01:49:43,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:49:43,021 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 21 [2021-12-07 01:49:43,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:49:43,023 INFO L225 Difference]: With dead ends: 397 [2021-12-07 01:49:43,023 INFO L226 Difference]: Without dead ends: 397 [2021-12-07 01:49:43,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 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 01:49:43,024 INFO L933 BasicCegarLoop]: 375 mSDtfsCounter, 252 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:49:43,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 1230 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:49:43,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-12-07 01:49:43,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 381. [2021-12-07 01:49:43,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 233 states have (on average 1.7467811158798283) internal successors, (407), 351 states have internal predecessors, (407), 19 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (30), 21 states have call predecessors, (30), 19 states have call successors, (30) [2021-12-07 01:49:43,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 456 transitions. [2021-12-07 01:49:43,030 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 456 transitions. Word has length 21 [2021-12-07 01:49:43,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:49:43,031 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 456 transitions. [2021-12-07 01:49:43,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 01:49:43,031 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 456 transitions. [2021-12-07 01:49:43,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-07 01:49:43,031 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:49:43,031 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 01:49:43,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-07 01:49:43,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:49:43,233 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:49:43,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:49:43,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1415040467, now seen corresponding path program 1 times [2021-12-07 01:49:43,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:49:43,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358551930] [2021-12-07 01:49:43,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:49:43,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:49:43,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:49:43,238 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:49:43,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-07 01:49:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:49:43,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 01:49:43,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:49:43,407 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 01:49:43,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 01:49:43,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:49:43,422 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:49:43,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358551930] [2021-12-07 01:49:43,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358551930] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:49:43,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:49:43,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:49:43,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212608862] [2021-12-07 01:49:43,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:49:43,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:49:43,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:49:43,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:49:43,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:49:43,423 INFO L87 Difference]: Start difference. First operand 381 states and 456 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:49:44,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:49:44,200 INFO L93 Difference]: Finished difference Result 422 states and 500 transitions. [2021-12-07 01:49:44,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:49:44,201 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2021-12-07 01:49:44,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:49:44,203 INFO L225 Difference]: With dead ends: 422 [2021-12-07 01:49:44,203 INFO L226 Difference]: Without dead ends: 422 [2021-12-07 01:49:44,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 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 01:49:44,203 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 57 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:49:44,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 1034 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-07 01:49:44,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-12-07 01:49:44,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 381. [2021-12-07 01:49:44,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 233 states have (on average 1.742489270386266) internal successors, (406), 351 states have internal predecessors, (406), 19 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (30), 21 states have call predecessors, (30), 19 states have call successors, (30) [2021-12-07 01:49:44,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 455 transitions. [2021-12-07 01:49:44,210 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 455 transitions. Word has length 23 [2021-12-07 01:49:44,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:49:44,211 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 455 transitions. [2021-12-07 01:49:44,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:49:44,211 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 455 transitions. [2021-12-07 01:49:44,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-07 01:49:44,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:49:44,211 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 01:49:44,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-12-07 01:49:44,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:49:44,412 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:49:44,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:49:44,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1415040466, now seen corresponding path program 1 times [2021-12-07 01:49:44,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:49:44,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670044511] [2021-12-07 01:49:44,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:49:44,413 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:49:44,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:49:44,414 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:49:44,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-07 01:49:44,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:49:44,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-07 01:49:44,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:49:44,696 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 01:49:44,700 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 01:49:44,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 01:49:44,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:49:44,731 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:49:44,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670044511] [2021-12-07 01:49:44,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670044511] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:49:44,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:49:44,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:49:44,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109413647] [2021-12-07 01:49:44,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:49:44,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:49:44,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:49:44,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:49:44,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:49:44,732 INFO L87 Difference]: Start difference. First operand 381 states and 455 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:49:45,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:49:45,601 INFO L93 Difference]: Finished difference Result 403 states and 477 transitions. [2021-12-07 01:49:45,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:49:45,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2021-12-07 01:49:45,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:49:45,604 INFO L225 Difference]: With dead ends: 403 [2021-12-07 01:49:45,604 INFO L226 Difference]: Without dead ends: 403 [2021-12-07 01:49:45,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 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 01:49:45,605 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 39 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:49:45,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 1085 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-07 01:49:45,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-12-07 01:49:45,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 381. [2021-12-07 01:49:45,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 233 states have (on average 1.738197424892704) internal successors, (405), 351 states have internal predecessors, (405), 19 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (30), 21 states have call predecessors, (30), 19 states have call successors, (30) [2021-12-07 01:49:45,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 454 transitions. [2021-12-07 01:49:45,612 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 454 transitions. Word has length 23 [2021-12-07 01:49:45,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:49:45,612 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 454 transitions. [2021-12-07 01:49:45,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:49:45,613 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 454 transitions. [2021-12-07 01:49:45,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-07 01:49:45,613 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:49:45,613 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 01:49:45,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-07 01:49:45,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:49:45,815 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr83ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:49:45,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:49:45,816 INFO L85 PathProgramCache]: Analyzing trace with hash -412937067, now seen corresponding path program 1 times [2021-12-07 01:49:45,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:49:45,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1909789050] [2021-12-07 01:49:45,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:49:45,818 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:49:45,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:49:45,819 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:49:45,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-07 01:49:45,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:49:45,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:49:45,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:49:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 01:49:45,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:49:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 01:49:45,995 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:49:45,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1909789050] [2021-12-07 01:49:45,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1909789050] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:49:45,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:49:45,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-12-07 01:49:45,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050067020] [2021-12-07 01:49:45,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:49:45,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:49:45,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:49:45,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:49:45,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:49:45,996 INFO L87 Difference]: Start difference. First operand 381 states and 454 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:49:46,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:49:46,029 INFO L93 Difference]: Finished difference Result 380 states and 453 transitions. [2021-12-07 01:49:46,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:49:46,030 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-12-07 01:49:46,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:49:46,031 INFO L225 Difference]: With dead ends: 380 [2021-12-07 01:49:46,031 INFO L226 Difference]: Without dead ends: 380 [2021-12-07 01:49:46,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 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 01:49:46,032 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 248 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:49:46,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 1063 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:49:46,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-12-07 01:49:46,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2021-12-07 01:49:46,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 233 states have (on average 1.7339055793991416) internal successors, (404), 350 states have internal predecessors, (404), 19 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (30), 21 states have call predecessors, (30), 19 states have call successors, (30) [2021-12-07 01:49:46,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 453 transitions. [2021-12-07 01:49:46,042 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 453 transitions. Word has length 25 [2021-12-07 01:49:46,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:49:46,042 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 453 transitions. [2021-12-07 01:49:46,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:49:46,042 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 453 transitions. [2021-12-07 01:49:46,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-07 01:49:46,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:49:46,043 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 01:49:46,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-12-07 01:49:46,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:49:46,243 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:49:46,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:49:46,244 INFO L85 PathProgramCache]: Analyzing trace with hash -412937301, now seen corresponding path program 1 times [2021-12-07 01:49:46,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:49:46,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262589318] [2021-12-07 01:49:46,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:49:46,244 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:49:46,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:49:46,245 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:49:46,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-07 01:49:46,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:49:46,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:49:46,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:49:46,336 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 01:49:46,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:49:46,336 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:49:46,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [262589318] [2021-12-07 01:49:46,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [262589318] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:49:46,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:49:46,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:49:46,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53098984] [2021-12-07 01:49:46,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:49:46,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:49:46,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:49:46,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:49:46,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:49:46,337 INFO L87 Difference]: Start difference. First operand 380 states and 453 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 01:49:46,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:49:46,361 INFO L93 Difference]: Finished difference Result 415 states and 481 transitions. [2021-12-07 01:49:46,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:49:46,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2021-12-07 01:49:46,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:49:46,364 INFO L225 Difference]: With dead ends: 415 [2021-12-07 01:49:46,364 INFO L226 Difference]: Without dead ends: 415 [2021-12-07 01:49:46,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 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 01:49:46,364 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 44 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:49:46,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 1445 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:49:46,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-12-07 01:49:46,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 371. [2021-12-07 01:49:46,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 226 states have (on average 1.7345132743362832) internal successors, (392), 343 states have internal predecessors, (392), 17 states have call successors, (17), 10 states have call predecessors, (17), 13 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2021-12-07 01:49:46,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 435 transitions. [2021-12-07 01:49:46,371 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 435 transitions. Word has length 25 [2021-12-07 01:49:46,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:49:46,371 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 435 transitions. [2021-12-07 01:49:46,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 01:49:46,371 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 435 transitions. [2021-12-07 01:49:46,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-07 01:49:46,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:49:46,372 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 01:49:46,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-12-07 01:49:46,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:49:46,573 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:49:46,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:49:46,573 INFO L85 PathProgramCache]: Analyzing trace with hash -441566452, now seen corresponding path program 1 times [2021-12-07 01:49:46,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:49:46,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276814134] [2021-12-07 01:49:46,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:49:46,575 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:49:46,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:49:46,576 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:49:46,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-07 01:49:46,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:49:46,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 01:49:46,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:49:46,798 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 01:49:46,874 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-07 01:49:46,874 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 01:49:46,891 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 01:49:46,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:49:47,027 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 01:49:47,027 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:49:47,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276814134] [2021-12-07 01:49:47,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276814134] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:49:47,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:49:47,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-12-07 01:49:47,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8066275] [2021-12-07 01:49:47,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:49:47,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 01:49:47,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:49:47,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 01:49:47,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:49:47,028 INFO L87 Difference]: Start difference. First operand 371 states and 435 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 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 01:49:48,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:49:48,402 INFO L93 Difference]: Finished difference Result 515 states and 605 transitions. [2021-12-07 01:49:48,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:49:48,402 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 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 01:49:48,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:49:48,405 INFO L225 Difference]: With dead ends: 515 [2021-12-07 01:49:48,405 INFO L226 Difference]: Without dead ends: 515 [2021-12-07 01:49:48,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 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 01:49:48,405 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 182 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:49:48,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 1304 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 733 Invalid, 0 Unknown, 223 Unchecked, 1.3s Time] [2021-12-07 01:49:48,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-12-07 01:49:48,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 373. [2021-12-07 01:49:48,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 229 states have (on average 1.724890829694323) internal successors, (395), 345 states have internal predecessors, (395), 17 states have call successors, (17), 10 states have call predecessors, (17), 13 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2021-12-07 01:49:48,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 438 transitions. [2021-12-07 01:49:48,412 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 438 transitions. Word has length 25 [2021-12-07 01:49:48,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:49:48,412 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 438 transitions. [2021-12-07 01:49:48,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 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 01:49:48,413 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 438 transitions. [2021-12-07 01:49:48,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-07 01:49:48,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:49:48,413 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 01:49:48,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-12-07 01:49:48,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:49:48,614 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:49:48,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:49:48,615 INFO L85 PathProgramCache]: Analyzing trace with hash -441566451, now seen corresponding path program 1 times [2021-12-07 01:49:48,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:49:48,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [726608578] [2021-12-07 01:49:48,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:49:48,617 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:49:48,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:49:48,619 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:49:48,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-07 01:49:48,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:49:48,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-07 01:49:48,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:49:48,746 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 6 treesize of output 5 [2021-12-07 01:49:52,875 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:49:52,876 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 01:49:52,897 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 01:49:52,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:49:53,142 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:49:53,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [726608578] [2021-12-07 01:49:53,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [726608578] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:49:53,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1330940506] [2021-12-07 01:49:53,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:49:53,142 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:49:53,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:49:53,143 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:49:53,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-12-07 01:49:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:49:53,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-07 01:49:53,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:49:53,264 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 01:49:53,267 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 01:49:55,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:49:55,495 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 01:49:55,503 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:49:55,503 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 01:49:55,513 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 01:49:55,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:49:55,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1330940506] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:49:55,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:49:55,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-12-07 01:49:55,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925520408] [2021-12-07 01:49:55,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:49:55,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 01:49:55,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:49:55,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 01:49:55,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=226, Unknown=3, NotChecked=0, Total=272 [2021-12-07 01:49:55,897 INFO L87 Difference]: Start difference. First operand 373 states and 438 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 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 01:50:00,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:50:00,915 INFO L93 Difference]: Finished difference Result 645 states and 746 transitions. [2021-12-07 01:50:00,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:50:00,916 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 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 01:50:00,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:50:00,919 INFO L225 Difference]: With dead ends: 645 [2021-12-07 01:50:00,919 INFO L226 Difference]: Without dead ends: 645 [2021-12-07 01:50:00,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=56, Invalid=282, Unknown=4, NotChecked=0, Total=342 [2021-12-07 01:50:00,919 INFO L933 BasicCegarLoop]: 345 mSDtfsCounter, 507 mSDsluCounter, 1937 mSDsCounter, 0 mSdLazyCounter, 1691 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 2282 SdHoareTripleChecker+Invalid, 2306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 547 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:50:00,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 2282 Invalid, 2306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1691 Invalid, 0 Unknown, 547 Unchecked, 2.9s Time] [2021-12-07 01:50:00,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-12-07 01:50:00,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 372. [2021-12-07 01:50:00,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 229 states have (on average 1.720524017467249) internal successors, (394), 344 states have internal predecessors, (394), 17 states have call successors, (17), 10 states have call predecessors, (17), 13 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2021-12-07 01:50:00,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 437 transitions. [2021-12-07 01:50:00,926 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 437 transitions. Word has length 25 [2021-12-07 01:50:00,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:50:00,927 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 437 transitions. [2021-12-07 01:50:00,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 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 01:50:00,927 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 437 transitions. [2021-12-07 01:50:00,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-07 01:50:00,927 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:50:00,927 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] [2021-12-07 01:50:00,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-12-07 01:50:01,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-12-07 01:50:01,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:50:01,329 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr84ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:50:01,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:50:01,330 INFO L85 PathProgramCache]: Analyzing trace with hash 83853234, now seen corresponding path program 1 times [2021-12-07 01:50:01,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:50:01,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1430883530] [2021-12-07 01:50:01,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:50:01,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:50:01,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:50:01,334 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:50:01,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-07 01:50:01,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:50:01,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:50:01,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:50:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 01:50:01,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:50:01,780 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 01:50:01,780 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:50:01,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1430883530] [2021-12-07 01:50:01,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1430883530] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:50:01,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:50:01,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-07 01:50:01,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064863106] [2021-12-07 01:50:01,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:50:01,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 01:50:01,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:50:01,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 01:50:01,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:50:01,782 INFO L87 Difference]: Start difference. First operand 372 states and 437 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:50:01,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:50:01,945 INFO L93 Difference]: Finished difference Result 606 states and 700 transitions. [2021-12-07 01:50:01,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:50:01,946 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 26 [2021-12-07 01:50:01,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:50:01,948 INFO L225 Difference]: With dead ends: 606 [2021-12-07 01:50:01,948 INFO L226 Difference]: Without dead ends: 606 [2021-12-07 01:50:01,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:50:01,949 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 324 mSDsluCounter, 1954 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 2300 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:50:01,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 2300 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 139 Invalid, 0 Unknown, 207 Unchecked, 0.2s Time] [2021-12-07 01:50:01,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-12-07 01:50:01,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 473. [2021-12-07 01:50:01,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 316 states have (on average 1.7563291139240507) internal successors, (555), 431 states have internal predecessors, (555), 27 states have call successors, (27), 16 states have call predecessors, (27), 20 states have return successors, (41), 29 states have call predecessors, (41), 27 states have call successors, (41) [2021-12-07 01:50:01,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 623 transitions. [2021-12-07 01:50:01,960 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 623 transitions. Word has length 26 [2021-12-07 01:50:01,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:50:01,960 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 623 transitions. [2021-12-07 01:50:01,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:50:01,960 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 623 transitions. [2021-12-07 01:50:01,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-07 01:50:01,961 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:50:01,961 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, 1, 1, 1] [2021-12-07 01:50:01,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-12-07 01:50:02,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:50:02,161 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr93REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:50:02,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:50:02,162 INFO L85 PathProgramCache]: Analyzing trace with hash -366162574, now seen corresponding path program 1 times [2021-12-07 01:50:02,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:50:02,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [86001352] [2021-12-07 01:50:02,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:50:02,163 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:50:02,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:50:02,163 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:50:02,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-07 01:50:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:50:02,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-07 01:50:02,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:50:02,385 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 01:50:02,389 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 01:50:02,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 01:50:02,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:50:02,435 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:50:02,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [86001352] [2021-12-07 01:50:02,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [86001352] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:50:02,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:50:02,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:50:02,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177426271] [2021-12-07 01:50:02,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:50:02,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:50:02,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:50:02,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:50:02,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:50:02,437 INFO L87 Difference]: Start difference. First operand 473 states and 623 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:50:02,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:50:02,846 INFO L93 Difference]: Finished difference Result 455 states and 584 transitions. [2021-12-07 01:50:02,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:50:02,847 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-12-07 01:50:02,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:50:02,850 INFO L225 Difference]: With dead ends: 455 [2021-12-07 01:50:02,850 INFO L226 Difference]: Without dead ends: 455 [2021-12-07 01:50:02,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:50:02,851 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 12 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1250 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:50:02,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1250 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 01:50:02,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-12-07 01:50:02,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 451. [2021-12-07 01:50:02,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 296 states have (on average 1.739864864864865) internal successors, (515), 411 states have internal predecessors, (515), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (40), 28 states have call predecessors, (40), 26 states have call successors, (40) [2021-12-07 01:50:02,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 581 transitions. [2021-12-07 01:50:02,860 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 581 transitions. Word has length 26 [2021-12-07 01:50:02,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:50:02,860 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 581 transitions. [2021-12-07 01:50:02,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:50:02,860 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 581 transitions. [2021-12-07 01:50:02,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-07 01:50:02,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:50:02,861 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, 1, 1, 1, 1, 1] [2021-12-07 01:50:02,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-12-07 01:50:03,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:50:03,061 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:50:03,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:50:03,062 INFO L85 PathProgramCache]: Analyzing trace with hash 305064464, now seen corresponding path program 1 times [2021-12-07 01:50:03,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:50:03,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670183275] [2021-12-07 01:50:03,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:50:03,062 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:50:03,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:50:03,063 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:50:03,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-07 01:50:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:50:03,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-07 01:50:03,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:50:03,292 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 01:50:03,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:50:07,468 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:50:07,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670183275] [2021-12-07 01:50:07,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670183275] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:50:07,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2114383465] [2021-12-07 01:50:07,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:50:07,469 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:50:07,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:50:07,469 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:50:07,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-12-07 01:50:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:50:07,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-07 01:50:07,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:50:07,751 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 01:50:07,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:50:11,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2114383465] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:50:11,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:50:11,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-12-07 01:50:11,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887280754] [2021-12-07 01:50:11,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:50:11,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 01:50:11,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:50:11,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 01:50:11,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=166, Unknown=2, NotChecked=0, Total=210 [2021-12-07 01:50:11,851 INFO L87 Difference]: Start difference. First operand 451 states and 581 transitions. Second operand has 12 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 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 01:50:12,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:50:12,860 INFO L93 Difference]: Finished difference Result 454 states and 583 transitions. [2021-12-07 01:50:12,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 01:50:12,861 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 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 28 [2021-12-07 01:50:12,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:50:12,863 INFO L225 Difference]: With dead ends: 454 [2021-12-07 01:50:12,863 INFO L226 Difference]: Without dead ends: 438 [2021-12-07 01:50:12,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=50, Invalid=220, Unknown=2, NotChecked=0, Total=272 [2021-12-07 01:50:12,864 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 60 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1944 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 637 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:50:12,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1944 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 419 Invalid, 0 Unknown, 637 Unchecked, 1.0s Time] [2021-12-07 01:50:12,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-12-07 01:50:12,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 438. [2021-12-07 01:50:12,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 284 states have (on average 1.767605633802817) internal successors, (502), 399 states have internal predecessors, (502), 26 states have call successors, (26), 15 states have call predecessors, (26), 18 states have return successors, (39), 27 states have call predecessors, (39), 26 states have call successors, (39) [2021-12-07 01:50:12,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 567 transitions. [2021-12-07 01:50:12,871 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 567 transitions. Word has length 28 [2021-12-07 01:50:12,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:50:12,871 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 567 transitions. [2021-12-07 01:50:12,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 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 01:50:12,871 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 567 transitions. [2021-12-07 01:50:12,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-07 01:50:12,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:50:12,872 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] [2021-12-07 01:50:12,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-12-07 01:50:13,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-12-07 01:50:13,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:50:13,274 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr88ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:50:13,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:50:13,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1975256279, now seen corresponding path program 1 times [2021-12-07 01:50:13,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:50:13,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859349077] [2021-12-07 01:50:13,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:50:13,277 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:50:13,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:50:13,278 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:50:13,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-07 01:50:13,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:50:13,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-07 01:50:13,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:50:13,404 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 01:50:13,473 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:50:13,473 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 01:50:13,558 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 21 treesize of output 23 [2021-12-07 01:50:13,568 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 01:50:13,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:50:13,829 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 01:50:13,829 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:50:13,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859349077] [2021-12-07 01:50:13,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859349077] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:50:13,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:50:13,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-12-07 01:50:13,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517951315] [2021-12-07 01:50:13,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:50:13,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-07 01:50:13,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:50:13,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-07 01:50:13,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-12-07 01:50:13,830 INFO L87 Difference]: Start difference. First operand 438 states and 567 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-07 01:50:17,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:50:17,560 INFO L93 Difference]: Finished difference Result 736 states and 847 transitions. [2021-12-07 01:50:17,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 01:50:17,560 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 30 [2021-12-07 01:50:17,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:50:17,563 INFO L225 Difference]: With dead ends: 736 [2021-12-07 01:50:17,563 INFO L226 Difference]: Without dead ends: 736 [2021-12-07 01:50:17,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-12-07 01:50:17,564 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 466 mSDsluCounter, 2586 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 2948 SdHoareTripleChecker+Invalid, 2617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 483 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:50:17,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 2948 Invalid, 2617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2060 Invalid, 0 Unknown, 483 Unchecked, 3.7s Time] [2021-12-07 01:50:17,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-12-07 01:50:17,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 444. [2021-12-07 01:50:17,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 290 states have (on average 1.7517241379310344) internal successors, (508), 404 states have internal predecessors, (508), 26 states have call successors, (26), 15 states have call predecessors, (26), 18 states have return successors, (39), 28 states have call predecessors, (39), 26 states have call successors, (39) [2021-12-07 01:50:17,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 573 transitions. [2021-12-07 01:50:17,572 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 573 transitions. Word has length 30 [2021-12-07 01:50:17,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:50:17,573 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 573 transitions. [2021-12-07 01:50:17,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-07 01:50:17,573 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 573 transitions. [2021-12-07 01:50:17,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-07 01:50:17,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:50:17,573 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] [2021-12-07 01:50:17,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-12-07 01:50:17,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:50:17,775 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:50:17,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:50:17,776 INFO L85 PathProgramCache]: Analyzing trace with hash -154246822, now seen corresponding path program 1 times [2021-12-07 01:50:17,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:50:17,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1497699025] [2021-12-07 01:50:17,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:50:17,778 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:50:17,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:50:17,780 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:50:17,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-07 01:50:17,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:50:17,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-07 01:50:17,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:50:17,956 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:50:17,956 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 01:50:18,050 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:50:18,050 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 26 treesize of output 33 [2021-12-07 01:50:18,357 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 17 treesize of output 19 [2021-12-07 01:50:18,418 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 17 treesize of output 19 [2021-12-07 01:50:18,431 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 01:50:18,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:50:18,522 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:50:18,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1497699025] [2021-12-07 01:50:18,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1497699025] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:50:18,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2130266693] [2021-12-07 01:50:18,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:50:18,522 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:50:18,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:50:18,523 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:50:18,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-12-07 01:50:18,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:50:18,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-07 01:50:18,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:50:18,648 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 9 treesize of output 3 [2021-12-07 01:50:18,694 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:50:18,695 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 01:50:18,826 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:50:18,826 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 26 treesize of output 33 [2021-12-07 01:50:19,082 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 20 treesize of output 22 [2021-12-07 01:50:19,239 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:50:19,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 49 [2021-12-07 01:50:19,306 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 01:50:19,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:50:19,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2130266693] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:50:19,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:50:19,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 13 [2021-12-07 01:50:19,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398047820] [2021-12-07 01:50:19,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:50:19,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-07 01:50:19,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:50:19,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-07 01:50:19,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-12-07 01:50:19,481 INFO L87 Difference]: Start difference. First operand 444 states and 573 transitions. Second operand has 15 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-07 01:50:19,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:50:19,843 INFO L93 Difference]: Finished difference Result 454 states and 583 transitions. [2021-12-07 01:50:19,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 01:50:19,844 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 32 [2021-12-07 01:50:19,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:50:19,845 INFO L225 Difference]: With dead ends: 454 [2021-12-07 01:50:19,845 INFO L226 Difference]: Without dead ends: 454 [2021-12-07 01:50:19,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-12-07 01:50:19,846 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 6 mSDsluCounter, 1563 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1883 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 647 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:50:19,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 1883 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 647 Unchecked, 0.3s Time] [2021-12-07 01:50:19,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-12-07 01:50:19,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 454. [2021-12-07 01:50:19,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 299 states have (on average 1.7324414715719063) internal successors, (518), 414 states have internal predecessors, (518), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (39), 28 states have call predecessors, (39), 26 states have call successors, (39) [2021-12-07 01:50:19,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 583 transitions. [2021-12-07 01:50:19,853 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 583 transitions. Word has length 32 [2021-12-07 01:50:19,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:50:19,853 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 583 transitions. [2021-12-07 01:50:19,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-07 01:50:19,854 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 583 transitions. [2021-12-07 01:50:19,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-07 01:50:19,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:50:19,854 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] [2021-12-07 01:50:19,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2021-12-07 01:50:20,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-12-07 01:50:20,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:50:20,256 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:50:20,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:50:20,257 INFO L85 PathProgramCache]: Analyzing trace with hash -154246821, now seen corresponding path program 1 times [2021-12-07 01:50:20,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:50:20,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420389382] [2021-12-07 01:50:20,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:50:20,259 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:50:20,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:50:20,260 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:50:20,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-12-07 01:50:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:50:20,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-07 01:50:20,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:50:22,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:50:22,457 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 01:50:32,640 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:50:32,640 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 18 [2021-12-07 01:50:32,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 4 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:50:32,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:50:33,370 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:50:33,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420389382] [2021-12-07 01:50:33,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420389382] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:50:33,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1966877329] [2021-12-07 01:50:33,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:50:33,370 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:50:33,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:50:33,371 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:50:33,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-12-07 01:50:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:50:33,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 01:50:33,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:50:33,493 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 9 treesize of output 3 [2021-12-07 01:50:33,586 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:50:33,586 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 18 treesize of output 18 [2021-12-07 01:50:33,591 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 01:50:33,666 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:50:33,667 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 18 [2021-12-07 01:50:33,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:50:33,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:50:34,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1966877329] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:50:34,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:50:34,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-12-07 01:50:34,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341554480] [2021-12-07 01:50:34,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:50:34,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 01:50:34,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:50:34,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 01:50:34,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=154, Unknown=6, NotChecked=0, Total=210 [2021-12-07 01:50:34,209 INFO L87 Difference]: Start difference. First operand 454 states and 583 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (3), 2 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 01:50:44,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:50:44,024 INFO L93 Difference]: Finished difference Result 454 states and 582 transitions. [2021-12-07 01:50:44,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-07 01:50:44,025 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (3), 2 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 32 [2021-12-07 01:50:44,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:50:44,027 INFO L225 Difference]: With dead ends: 454 [2021-12-07 01:50:44,027 INFO L226 Difference]: Without dead ends: 454 [2021-12-07 01:50:44,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=123, Invalid=373, Unknown=10, NotChecked=0, Total=506 [2021-12-07 01:50:44,027 INFO L933 BasicCegarLoop]: 330 mSDtfsCounter, 12 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1826 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 414 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:50:44,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1826 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 752 Invalid, 0 Unknown, 414 Unchecked, 1.6s Time] [2021-12-07 01:50:44,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-12-07 01:50:44,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 454. [2021-12-07 01:50:44,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 299 states have (on average 1.7290969899665551) internal successors, (517), 414 states have internal predecessors, (517), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (39), 28 states have call predecessors, (39), 26 states have call successors, (39) [2021-12-07 01:50:44,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 582 transitions. [2021-12-07 01:50:44,034 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 582 transitions. Word has length 32 [2021-12-07 01:50:44,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:50:44,035 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 582 transitions. [2021-12-07 01:50:44,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (3), 2 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 01:50:44,035 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 582 transitions. [2021-12-07 01:50:44,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-07 01:50:44,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:50:44,035 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 01:50:44,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-12-07 01:50:44,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2021-12-07 01:50:44,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:50:44,437 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:50:44,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:50:44,438 INFO L85 PathProgramCache]: Analyzing trace with hash 139156185, now seen corresponding path program 1 times [2021-12-07 01:50:44,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:50:44,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180840698] [2021-12-07 01:50:44,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:50:44,440 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:50:44,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:50:44,442 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:50:44,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-12-07 01:50:44,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:50:44,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:50:44,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:50:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 01:50:44,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:50:44,558 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:50:44,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180840698] [2021-12-07 01:50:44,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180840698] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:50:44,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:50:44,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:50:44,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474493505] [2021-12-07 01:50:44,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:50:44,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:50:44,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:50:44,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:50:44,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:50:44,559 INFO L87 Difference]: Start difference. First operand 454 states and 582 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 01:50:44,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:50:44,585 INFO L93 Difference]: Finished difference Result 479 states and 608 transitions. [2021-12-07 01:50:44,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:50:44,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2021-12-07 01:50:44,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:50:44,587 INFO L225 Difference]: With dead ends: 479 [2021-12-07 01:50:44,587 INFO L226 Difference]: Without dead ends: 479 [2021-12-07 01:50:44,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 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 01:50:44,587 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 245 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:50:44,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 1240 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:50:44,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-12-07 01:50:44,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 448. [2021-12-07 01:50:44,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 293 states have (on average 1.7406143344709897) internal successors, (510), 408 states have internal predecessors, (510), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (39), 28 states have call predecessors, (39), 26 states have call successors, (39) [2021-12-07 01:50:44,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 575 transitions. [2021-12-07 01:50:44,595 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 575 transitions. Word has length 32 [2021-12-07 01:50:44,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:50:44,595 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 575 transitions. [2021-12-07 01:50:44,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 01:50:44,595 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 575 transitions. [2021-12-07 01:50:44,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-07 01:50:44,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:50:44,595 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] [2021-12-07 01:50:44,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-12-07 01:50:44,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:50:44,797 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr80ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:50:44,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:50:44,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1682263433, now seen corresponding path program 1 times [2021-12-07 01:50:44,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:50:44,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003401673] [2021-12-07 01:50:44,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:50:44,799 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:50:44,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:50:44,802 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:50:44,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-12-07 01:50:44,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:50:44,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:50:44,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:50:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 01:50:44,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:50:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 01:50:45,009 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:50:45,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003401673] [2021-12-07 01:50:45,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003401673] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:50:45,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:50:45,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-12-07 01:50:45,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347768427] [2021-12-07 01:50:45,010 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:50:45,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:50:45,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:50:45,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:50:45,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:50:45,011 INFO L87 Difference]: Start difference. First operand 448 states and 575 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:50:45,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:50:45,031 INFO L93 Difference]: Finished difference Result 447 states and 574 transitions. [2021-12-07 01:50:45,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:50:45,032 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2021-12-07 01:50:45,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:50:45,034 INFO L225 Difference]: With dead ends: 447 [2021-12-07 01:50:45,034 INFO L226 Difference]: Without dead ends: 447 [2021-12-07 01:50:45,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 61 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 01:50:45,035 INFO L933 BasicCegarLoop]: 330 mSDtfsCounter, 241 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:50:45,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 1061 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:50:45,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-12-07 01:50:45,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2021-12-07 01:50:45,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 293 states have (on average 1.7372013651877134) internal successors, (509), 407 states have internal predecessors, (509), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (39), 28 states have call predecessors, (39), 26 states have call successors, (39) [2021-12-07 01:50:45,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 574 transitions. [2021-12-07 01:50:45,045 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 574 transitions. Word has length 33 [2021-12-07 01:50:45,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:50:45,045 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 574 transitions. [2021-12-07 01:50:45,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:50:45,046 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 574 transitions. [2021-12-07 01:50:45,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-07 01:50:45,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:50:45,046 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] [2021-12-07 01:50:45,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-12-07 01:50:45,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:50:45,248 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:50:45,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:50:45,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1682263217, now seen corresponding path program 1 times [2021-12-07 01:50:45,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:50:45,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457458998] [2021-12-07 01:50:45,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:50:45,250 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:50:45,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:50:45,253 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:50:45,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-12-07 01:50:45,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:50:45,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:50:45,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:50:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 01:50:45,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:50:45,393 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:50:45,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457458998] [2021-12-07 01:50:45,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457458998] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:50:45,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:50:45,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:50:45,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613445212] [2021-12-07 01:50:45,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:50:45,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:50:45,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:50:45,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:50:45,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:50:45,394 INFO L87 Difference]: Start difference. First operand 447 states and 574 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:50:45,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:50:45,421 INFO L93 Difference]: Finished difference Result 407 states and 451 transitions. [2021-12-07 01:50:45,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:50:45,422 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2021-12-07 01:50:45,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:50:45,423 INFO L225 Difference]: With dead ends: 407 [2021-12-07 01:50:45,423 INFO L226 Difference]: Without dead ends: 407 [2021-12-07 01:50:45,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 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 01:50:45,424 INFO L933 BasicCegarLoop]: 374 mSDtfsCounter, 49 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1444 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:50:45,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1444 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:50:45,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-12-07 01:50:45,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 358. [2021-12-07 01:50:45,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 215 states have (on average 1.6744186046511629) internal successors, (360), 329 states have internal predecessors, (360), 16 states have call successors, (16), 11 states have call predecessors, (16), 15 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2021-12-07 01:50:45,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 400 transitions. [2021-12-07 01:50:45,429 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 400 transitions. Word has length 33 [2021-12-07 01:50:45,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:50:45,430 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 400 transitions. [2021-12-07 01:50:45,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:50:45,430 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 400 transitions. [2021-12-07 01:50:45,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-07 01:50:45,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:50:45,430 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] [2021-12-07 01:50:45,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-12-07 01:50:45,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:50:45,631 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:50:45,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:50:45,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1653634065, now seen corresponding path program 1 times [2021-12-07 01:50:45,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:50:45,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946895007] [2021-12-07 01:50:45,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:50:45,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:50:45,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:50:45,636 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:50:45,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-12-07 01:50:45,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:50:45,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-07 01:50:45,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:50:45,886 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 01:50:45,952 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:50:45,952 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 26 treesize of output 33 [2021-12-07 01:50:46,021 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:50:46,021 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 01:50:48,086 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-07 01:50:48,087 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 01:50:48,098 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 4 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 01:50:48,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:50:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 01:50:52,435 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:50:52,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946895007] [2021-12-07 01:50:52,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946895007] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-07 01:50:52,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:50:52,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-07 01:50:52,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737359475] [2021-12-07 01:50:52,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:50:52,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:50:52,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:50:52,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:50:52,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=53, Unknown=1, NotChecked=0, Total=72 [2021-12-07 01:50:52,436 INFO L87 Difference]: Start difference. First operand 358 states and 400 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 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 01:50:52,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:50:52,693 INFO L93 Difference]: Finished difference Result 362 states and 404 transitions. [2021-12-07 01:50:52,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:50:52,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 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 33 [2021-12-07 01:50:52,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:50:52,696 INFO L225 Difference]: With dead ends: 362 [2021-12-07 01:50:52,696 INFO L226 Difference]: Without dead ends: 362 [2021-12-07 01:50:52,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 11 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=18, Invalid=53, Unknown=1, NotChecked=0, Total=72 [2021-12-07 01:50:52,696 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 22 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:50:52,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 702 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 148 Unchecked, 0.3s Time] [2021-12-07 01:50:52,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-12-07 01:50:52,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 357. [2021-12-07 01:50:52,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 215 states have (on average 1.669767441860465) internal successors, (359), 328 states have internal predecessors, (359), 16 states have call successors, (16), 11 states have call predecessors, (16), 15 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2021-12-07 01:50:52,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 399 transitions. [2021-12-07 01:50:52,701 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 399 transitions. Word has length 33 [2021-12-07 01:50:52,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:50:52,702 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 399 transitions. [2021-12-07 01:50:52,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 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 01:50:52,702 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 399 transitions. [2021-12-07 01:50:52,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-07 01:50:52,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:50:52,702 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] [2021-12-07 01:50:52,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-12-07 01:50:52,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:50:52,903 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:50:52,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:50:52,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1653634066, now seen corresponding path program 1 times [2021-12-07 01:50:52,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:50:52,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768921519] [2021-12-07 01:50:52,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:50:52,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:50:52,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:50:52,909 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:50:52,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-12-07 01:50:53,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:50:53,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-07 01:50:53,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:50:53,023 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 01:50:53,027 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 01:50:53,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:50:53,162 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 01:50:53,177 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:50:53,177 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 01:50:53,299 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:50:53,299 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 01:50:53,304 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 01:50:53,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:50:53,408 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 01:50:53,415 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:50:53,416 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 01:50:53,446 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 01:50:53,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:50:53,746 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:50:53,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768921519] [2021-12-07 01:50:53,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768921519] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:50:53,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1625392848] [2021-12-07 01:50:53,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:50:53,746 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:50:53,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:50:53,747 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:50:53,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-12-07 01:50:53,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:50:53,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-07 01:50:53,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:50:53,904 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 01:50:53,909 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 01:50:54,007 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:50:54,008 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 01:50:54,013 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 01:50:54,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:50:54,142 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 01:50:54,156 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:50:54,156 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 01:50:54,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:50:54,256 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 01:50:54,264 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:50:54,264 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 18 treesize of output 18 [2021-12-07 01:50:54,278 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:50:54,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:50:54,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1625392848] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:50:54,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:50:54,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 11 [2021-12-07 01:50:54,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974225930] [2021-12-07 01:50:54,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:50:54,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 01:50:54,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:50:54,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 01:50:54,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:50:54,484 INFO L87 Difference]: Start difference. First operand 357 states and 399 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-07 01:50:59,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:50:59,720 INFO L93 Difference]: Finished difference Result 610 states and 683 transitions. [2021-12-07 01:50:59,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:50:59,720 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-12-07 01:50:59,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:50:59,723 INFO L225 Difference]: With dead ends: 610 [2021-12-07 01:50:59,723 INFO L226 Difference]: Without dead ends: 610 [2021-12-07 01:50:59,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=51, Invalid=220, Unknown=1, NotChecked=0, Total=272 [2021-12-07 01:50:59,723 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 313 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1334 SdHoareTripleChecker+Invalid, 1859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 304 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:50:59,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 1334 Invalid, 1859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1513 Invalid, 0 Unknown, 304 Unchecked, 3.1s Time] [2021-12-07 01:50:59,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-12-07 01:50:59,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 356. [2021-12-07 01:50:59,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 215 states have (on average 1.6604651162790698) internal successors, (357), 327 states have internal predecessors, (357), 16 states have call successors, (16), 11 states have call predecessors, (16), 15 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2021-12-07 01:50:59,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 397 transitions. [2021-12-07 01:50:59,730 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 397 transitions. Word has length 33 [2021-12-07 01:50:59,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:50:59,730 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 397 transitions. [2021-12-07 01:50:59,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-07 01:50:59,730 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 397 transitions. [2021-12-07 01:50:59,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-07 01:50:59,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:50:59,730 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] [2021-12-07 01:50:59,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-12-07 01:50:59,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-12-07 01:51:00,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:51:00,132 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr81ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:51:00,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:51:00,134 INFO L85 PathProgramCache]: Analyzing trace with hash 610559287, now seen corresponding path program 1 times [2021-12-07 01:51:00,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:51:00,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857032088] [2021-12-07 01:51:00,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:51:00,136 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:51:00,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:51:00,137 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:51:00,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-12-07 01:51:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:51:00,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:51:00,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:51:00,563 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 01:51:00,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:51:00,671 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 01:51:00,671 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:51:00,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1857032088] [2021-12-07 01:51:00,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1857032088] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:51:00,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:51:00,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-07 01:51:00,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284263288] [2021-12-07 01:51:00,672 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:51:00,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 01:51:00,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:51:00,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 01:51:00,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:51:00,672 INFO L87 Difference]: Start difference. First operand 356 states and 397 transitions. Second operand has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-07 01:51:00,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:51:00,730 INFO L93 Difference]: Finished difference Result 358 states and 399 transitions. [2021-12-07 01:51:00,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:51:00,731 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 34 [2021-12-07 01:51:00,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:51:00,732 INFO L225 Difference]: With dead ends: 358 [2021-12-07 01:51:00,732 INFO L226 Difference]: Without dead ends: 358 [2021-12-07 01:51:00,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:51:00,733 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 19 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1825 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:51:00,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 1825 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 88 Unchecked, 0.1s Time] [2021-12-07 01:51:00,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-12-07 01:51:00,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2021-12-07 01:51:00,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 217 states have (on average 1.6543778801843319) internal successors, (359), 329 states have internal predecessors, (359), 16 states have call successors, (16), 11 states have call predecessors, (16), 15 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2021-12-07 01:51:00,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 399 transitions. [2021-12-07 01:51:00,738 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 399 transitions. Word has length 34 [2021-12-07 01:51:00,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:51:00,738 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 399 transitions. [2021-12-07 01:51:00,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-07 01:51:00,738 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 399 transitions. [2021-12-07 01:51:00,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-07 01:51:00,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:51:00,738 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] [2021-12-07 01:51:00,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2021-12-07 01:51:00,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:51:00,940 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:51:00,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:51:00,941 INFO L85 PathProgramCache]: Analyzing trace with hash 2092671515, now seen corresponding path program 1 times [2021-12-07 01:51:00,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:51:00,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1470942420] [2021-12-07 01:51:00,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:51:00,943 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:51:00,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:51:00,945 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:51:00,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-12-07 01:51:01,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:51:01,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-07 01:51:01,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:51:01,261 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:51:01,261 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 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-07 01:51:01,266 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 5 treesize of output 3 [2021-12-07 01:51:01,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-07 01:51:01,426 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 19 treesize of output 11 [2021-12-07 01:51:01,487 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 01:51:01,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:51:01,560 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-12-07 01:51:01,561 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 35 treesize of output 34 [2021-12-07 01:51:01,739 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 01:51:01,740 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:51:01,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1470942420] [2021-12-07 01:51:01,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1470942420] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-07 01:51:01,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:51:01,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2021-12-07 01:51:01,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192712394] [2021-12-07 01:51:01,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:51:01,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 01:51:01,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:51:01,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 01:51:01,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-12-07 01:51:01,741 INFO L87 Difference]: Start difference. First operand 358 states and 399 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:51:03,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:51:03,369 INFO L93 Difference]: Finished difference Result 398 states and 441 transitions. [2021-12-07 01:51:03,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:51:03,371 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2021-12-07 01:51:03,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:51:03,372 INFO L225 Difference]: With dead ends: 398 [2021-12-07 01:51:03,372 INFO L226 Difference]: Without dead ends: 398 [2021-12-07 01:51:03,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-12-07 01:51:03,373 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 91 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1721 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:51:03,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 1721 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-07 01:51:03,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-12-07 01:51:03,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 360. [2021-12-07 01:51:03,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 219 states have (on average 1.6529680365296804) internal successors, (362), 331 states have internal predecessors, (362), 16 states have call successors, (16), 11 states have call predecessors, (16), 15 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2021-12-07 01:51:03,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 402 transitions. [2021-12-07 01:51:03,378 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 402 transitions. Word has length 34 [2021-12-07 01:51:03,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:51:03,378 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 402 transitions. [2021-12-07 01:51:03,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:51:03,378 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 402 transitions. [2021-12-07 01:51:03,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-07 01:51:03,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:51:03,378 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] [2021-12-07 01:51:03,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-12-07 01:51:03,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:51:03,580 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:51:03,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:51:03,581 INFO L85 PathProgramCache]: Analyzing trace with hash 2092671516, now seen corresponding path program 1 times [2021-12-07 01:51:03,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:51:03,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935250746] [2021-12-07 01:51:03,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:51:03,583 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:51:03,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:51:03,585 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:51:03,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-12-07 01:51:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:51:03,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-07 01:51:03,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:51:03,865 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:51:03,865 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 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-07 01:51:03,872 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 5 treesize of output 3 [2021-12-07 01:51:03,895 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:51:03,895 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 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-07 01:51:03,903 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 5 treesize of output 3 [2021-12-07 01:51:04,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-07 01:51:04,223 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 19 treesize of output 11 [2021-12-07 01:51:04,227 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 19 treesize of output 11 [2021-12-07 01:51:04,237 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:51:04,237 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 16 treesize of output 16 [2021-12-07 01:51:04,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 01:51:04,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:51:04,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:51:04,432 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 38 treesize of output 42 [2021-12-07 01:51:04,672 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 11 [2021-12-07 01:51:05,412 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 01:51:05,412 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:51:05,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935250746] [2021-12-07 01:51:05,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935250746] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-07 01:51:05,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:51:05,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2021-12-07 01:51:05,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277776210] [2021-12-07 01:51:05,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:51:05,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 01:51:05,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:51:05,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 01:51:05,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-12-07 01:51:05,414 INFO L87 Difference]: Start difference. First operand 360 states and 402 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:51:08,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:51:08,393 INFO L93 Difference]: Finished difference Result 398 states and 441 transitions. [2021-12-07 01:51:08,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:51:08,394 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2021-12-07 01:51:08,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:51:08,395 INFO L225 Difference]: With dead ends: 398 [2021-12-07 01:51:08,395 INFO L226 Difference]: Without dead ends: 398 [2021-12-07 01:51:08,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-12-07 01:51:08,396 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 137 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1502 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:51:08,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 1502 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-07 01:51:08,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-12-07 01:51:08,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 360. [2021-12-07 01:51:08,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 219 states have (on average 1.6484018264840183) internal successors, (361), 331 states have internal predecessors, (361), 16 states have call successors, (16), 11 states have call predecessors, (16), 15 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2021-12-07 01:51:08,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 401 transitions. [2021-12-07 01:51:08,403 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 401 transitions. Word has length 34 [2021-12-07 01:51:08,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:51:08,403 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 401 transitions. [2021-12-07 01:51:08,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:51:08,403 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 401 transitions. [2021-12-07 01:51:08,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-07 01:51:08,404 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:51:08,404 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] [2021-12-07 01:51:08,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-12-07 01:51:08,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:51:08,605 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr82ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:51:08,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:51:08,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1747469131, now seen corresponding path program 1 times [2021-12-07 01:51:08,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:51:08,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1333096478] [2021-12-07 01:51:08,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:51:08,608 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:51:08,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:51:08,610 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:51:08,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-12-07 01:51:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:51:08,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:51:08,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:51:08,831 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 01:51:08,876 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 01:51:08,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:51:08,970 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 01:51:08,970 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:51:08,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1333096478] [2021-12-07 01:51:08,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1333096478] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:51:08,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:51:08,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-12-07 01:51:08,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441281209] [2021-12-07 01:51:08,970 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:51:08,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:51:08,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:51:08,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:51:08,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:51:08,971 INFO L87 Difference]: Start difference. First operand 360 states and 401 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-07 01:51:09,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:51:09,522 INFO L93 Difference]: Finished difference Result 363 states and 404 transitions. [2021-12-07 01:51:09,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:51:09,523 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2021-12-07 01:51:09,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:51:09,524 INFO L225 Difference]: With dead ends: 363 [2021-12-07 01:51:09,524 INFO L226 Difference]: Without dead ends: 363 [2021-12-07 01:51:09,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:51:09,525 INFO L933 BasicCegarLoop]: 337 mSDtfsCounter, 0 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:51:09,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1159 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 393 Invalid, 0 Unknown, 159 Unchecked, 0.5s Time] [2021-12-07 01:51:09,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-12-07 01:51:09,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2021-12-07 01:51:09,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 222 states have (on average 1.6396396396396395) internal successors, (364), 334 states have internal predecessors, (364), 16 states have call successors, (16), 11 states have call predecessors, (16), 15 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2021-12-07 01:51:09,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 404 transitions. [2021-12-07 01:51:09,529 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 404 transitions. Word has length 35 [2021-12-07 01:51:09,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:51:09,529 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 404 transitions. [2021-12-07 01:51:09,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-07 01:51:09,530 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 404 transitions. [2021-12-07 01:51:09,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-07 01:51:09,530 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:51:09,530 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] [2021-12-07 01:51:09,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-12-07 01:51:09,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:51:09,731 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr82ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:51:09,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:51:09,732 INFO L85 PathProgramCache]: Analyzing trace with hash 4658796, now seen corresponding path program 1 times [2021-12-07 01:51:09,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:51:09,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424843538] [2021-12-07 01:51:09,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:51:09,734 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:51:09,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:51:09,736 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:51:09,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-12-07 01:51:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:51:09,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:51:09,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:51:09,951 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 01:51:09,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:51:09,952 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:51:09,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424843538] [2021-12-07 01:51:09,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1424843538] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:51:09,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:51:09,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:51:09,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130538195] [2021-12-07 01:51:09,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:51:09,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:51:09,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:51:09,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:51:09,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:51:09,953 INFO L87 Difference]: Start difference. First operand 363 states and 404 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:51:09,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:51:09,988 INFO L93 Difference]: Finished difference Result 405 states and 447 transitions. [2021-12-07 01:51:09,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:51:09,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2021-12-07 01:51:09,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:51:09,990 INFO L225 Difference]: With dead ends: 405 [2021-12-07 01:51:09,990 INFO L226 Difference]: Without dead ends: 405 [2021-12-07 01:51:09,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 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 01:51:09,991 INFO L933 BasicCegarLoop]: 381 mSDtfsCounter, 238 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1269 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:51:09,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 1269 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:51:09,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-12-07 01:51:09,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 361. [2021-12-07 01:51:09,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 220 states have (on average 1.6409090909090909) internal successors, (361), 332 states have internal predecessors, (361), 16 states have call successors, (16), 11 states have call predecessors, (16), 15 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2021-12-07 01:51:09,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 401 transitions. [2021-12-07 01:51:09,995 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 401 transitions. Word has length 35 [2021-12-07 01:51:09,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:51:09,996 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 401 transitions. [2021-12-07 01:51:09,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:51:09,996 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 401 transitions. [2021-12-07 01:51:09,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-07 01:51:09,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:51:09,996 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 01:51:10,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2021-12-07 01:51:10,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:51:10,197 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr84ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:51:10,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:51:10,198 INFO L85 PathProgramCache]: Analyzing trace with hash -14364371, now seen corresponding path program 1 times [2021-12-07 01:51:10,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:51:10,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [28111602] [2021-12-07 01:51:10,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:51:10,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:51:10,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:51:10,202 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:51:10,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-12-07 01:51:10,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:51:10,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:51:10,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:51:10,629 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 01:51:10,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:51:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 01:51:10,753 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:51:10,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [28111602] [2021-12-07 01:51:10,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [28111602] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:51:10,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:51:10,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-07 01:51:10,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989548876] [2021-12-07 01:51:10,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:51:10,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 01:51:10,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:51:10,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 01:51:10,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:51:10,754 INFO L87 Difference]: Start difference. First operand 361 states and 401 transitions. Second operand has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-07 01:51:10,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:51:10,879 INFO L93 Difference]: Finished difference Result 565 states and 629 transitions. [2021-12-07 01:51:10,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:51:10,880 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 37 [2021-12-07 01:51:10,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:51:10,882 INFO L225 Difference]: With dead ends: 565 [2021-12-07 01:51:10,882 INFO L226 Difference]: Without dead ends: 565 [2021-12-07 01:51:10,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:51:10,882 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 292 mSDsluCounter, 1403 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 1824 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:51:10,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 1824 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 91 Invalid, 0 Unknown, 171 Unchecked, 0.1s Time] [2021-12-07 01:51:10,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-12-07 01:51:10,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 444. [2021-12-07 01:51:10,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 293 states have (on average 1.6928327645051195) internal successors, (496), 404 states have internal predecessors, (496), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2021-12-07 01:51:10,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 553 transitions. [2021-12-07 01:51:10,888 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 553 transitions. Word has length 37 [2021-12-07 01:51:10,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:51:10,889 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 553 transitions. [2021-12-07 01:51:10,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-07 01:51:10,889 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 553 transitions. [2021-12-07 01:51:10,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-07 01:51:10,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:51:10,889 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] [2021-12-07 01:51:10,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2021-12-07 01:51:11,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:51:11,090 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr93REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:51:11,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:51:11,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1327181508, now seen corresponding path program 1 times [2021-12-07 01:51:11,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:51:11,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [680352616] [2021-12-07 01:51:11,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:51:11,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:51:11,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:51:11,095 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:51:11,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-12-07 01:51:11,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:51:11,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:51:11,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:51:11,244 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 01:51:11,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:51:11,245 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:51:11,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [680352616] [2021-12-07 01:51:11,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [680352616] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:51:11,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:51:11,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:51:11,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820657881] [2021-12-07 01:51:11,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:51:11,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:51:11,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:51:11,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:51:11,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:51:11,246 INFO L87 Difference]: Start difference. First operand 444 states and 553 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 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 01:51:11,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:51:11,641 INFO L93 Difference]: Finished difference Result 462 states and 573 transitions. [2021-12-07 01:51:11,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:51:11,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 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 37 [2021-12-07 01:51:11,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:51:11,643 INFO L225 Difference]: With dead ends: 462 [2021-12-07 01:51:11,643 INFO L226 Difference]: Without dead ends: 462 [2021-12-07 01:51:11,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 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 01:51:11,644 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 42 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:51:11,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 738 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 01:51:11,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-12-07 01:51:11,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 445. [2021-12-07 01:51:11,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 295 states have (on average 1.6915254237288135) internal successors, (499), 405 states have internal predecessors, (499), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2021-12-07 01:51:11,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 556 transitions. [2021-12-07 01:51:11,649 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 556 transitions. Word has length 37 [2021-12-07 01:51:11,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:51:11,650 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 556 transitions. [2021-12-07 01:51:11,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 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 01:51:11,650 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 556 transitions. [2021-12-07 01:51:11,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-07 01:51:11,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:51:11,650 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, 1, 1, 1, 1, 1, 1] [2021-12-07 01:51:11,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-12-07 01:51:11,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:51:11,851 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr94REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:51:11,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:51:11,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1327181509, now seen corresponding path program 1 times [2021-12-07 01:51:11,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:51:11,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390811892] [2021-12-07 01:51:11,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:51:11,854 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:51:11,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:51:11,856 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:51:11,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-12-07 01:51:11,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:51:11,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-07 01:51:11,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:51:12,166 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:51:12,166 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 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-07 01:51:12,172 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 5 treesize of output 3 [2021-12-07 01:51:12,191 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:51:12,191 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 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-07 01:51:12,195 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 5 treesize of output 3 [2021-12-07 01:51:12,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-07 01:51:12,487 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 19 treesize of output 11 [2021-12-07 01:51:12,492 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 19 treesize of output 11 [2021-12-07 01:51:12,500 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:51:12,501 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 15 treesize of output 15 [2021-12-07 01:51:12,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 01:51:12,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:51:12,675 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 11 [2021-12-07 01:51:12,911 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 01:51:12,911 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:51:12,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390811892] [2021-12-07 01:51:12,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390811892] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-07 01:51:12,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:51:12,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2021-12-07 01:51:12,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810868781] [2021-12-07 01:51:12,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:51:12,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 01:51:12,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:51:12,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 01:51:12,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-12-07 01:51:12,912 INFO L87 Difference]: Start difference. First operand 445 states and 556 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:51:14,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:51:14,156 INFO L93 Difference]: Finished difference Result 451 states and 561 transitions. [2021-12-07 01:51:14,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:51:14,157 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2021-12-07 01:51:14,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:51:14,159 INFO L225 Difference]: With dead ends: 451 [2021-12-07 01:51:14,159 INFO L226 Difference]: Without dead ends: 451 [2021-12-07 01:51:14,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-12-07 01:51:14,160 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 30 mSDsluCounter, 1616 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1940 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:51:14,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 1940 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-07 01:51:14,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-12-07 01:51:14,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 447. [2021-12-07 01:51:14,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 297 states have (on average 1.6868686868686869) internal successors, (501), 407 states have internal predecessors, (501), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2021-12-07 01:51:14,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 558 transitions. [2021-12-07 01:51:14,165 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 558 transitions. Word has length 37 [2021-12-07 01:51:14,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:51:14,165 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 558 transitions. [2021-12-07 01:51:14,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:51:14,165 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 558 transitions. [2021-12-07 01:51:14,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-07 01:51:14,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:51:14,166 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] [2021-12-07 01:51:14,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-12-07 01:51:14,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:51:14,367 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr85ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:51:14,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:51:14,368 INFO L85 PathProgramCache]: Analyzing trace with hash -445295076, now seen corresponding path program 1 times [2021-12-07 01:51:14,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:51:14,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85881826] [2021-12-07 01:51:14,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:51:14,370 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:51:14,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:51:14,372 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:51:14,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-12-07 01:51:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:51:14,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-07 01:51:14,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:51:14,616 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 01:51:14,692 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:51:14,692 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 01:51:14,847 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 01:51:14,866 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 01:51:14,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:51:14,957 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:51:14,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85881826] [2021-12-07 01:51:14,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85881826] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:51:14,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [611277471] [2021-12-07 01:51:14,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:51:14,958 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:51:14,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:51:14,959 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:51:14,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2021-12-07 01:51:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:51:15,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-07 01:51:15,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:51:15,127 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 01:51:15,169 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:51:15,169 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 01:51:15,304 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:51:15,305 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 49 treesize of output 58 [2021-12-07 01:51:15,333 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 01:51:15,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:51:15,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [611277471] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:51:15,425 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:51:15,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-12-07 01:51:15,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461695702] [2021-12-07 01:51:15,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:51:15,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-07 01:51:15,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:51:15,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-07 01:51:15,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-07 01:51:15,426 INFO L87 Difference]: Start difference. First operand 447 states and 558 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:51:16,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:51:16,775 INFO L93 Difference]: Finished difference Result 450 states and 562 transitions. [2021-12-07 01:51:16,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:51:16,776 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2021-12-07 01:51:16,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:51:16,778 INFO L225 Difference]: With dead ends: 450 [2021-12-07 01:51:16,778 INFO L226 Difference]: Without dead ends: 450 [2021-12-07 01:51:16,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 13 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:51:16,778 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 49 mSDsluCounter, 1888 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 2196 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 360 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:51:16,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 2196 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 709 Invalid, 0 Unknown, 360 Unchecked, 1.3s Time] [2021-12-07 01:51:16,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-12-07 01:51:16,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2021-12-07 01:51:16,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 298 states have (on average 1.6845637583892616) internal successors, (502), 408 states have internal predecessors, (502), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2021-12-07 01:51:16,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 559 transitions. [2021-12-07 01:51:16,784 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 559 transitions. Word has length 38 [2021-12-07 01:51:16,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:51:16,784 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 559 transitions. [2021-12-07 01:51:16,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:51:16,784 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 559 transitions. [2021-12-07 01:51:16,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-07 01:51:16,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:51:16,785 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, 1] [2021-12-07 01:51:16,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (50)] Ended with exit code 0 [2021-12-07 01:51:16,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2021-12-07 01:51:17,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:51:17,186 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:51:17,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:51:17,187 INFO L85 PathProgramCache]: Analyzing trace with hash -183877918, now seen corresponding path program 1 times [2021-12-07 01:51:17,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:51:17,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21722926] [2021-12-07 01:51:17,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:51:17,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:51:17,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:51:17,189 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:51:17,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-12-07 01:51:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:51:17,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 01:51:17,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:51:23,970 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:51:23,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:51:24,108 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 11 [2021-12-07 01:51:26,487 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:51:26,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21722926] [2021-12-07 01:51:26,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [21722926] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:51:26,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1817557144] [2021-12-07 01:51:26,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:51:26,488 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:51:26,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:51:26,489 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:51:26,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2021-12-07 01:51:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:51:26,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-07 01:51:26,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:51:38,995 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 01:51:38,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:51:41,228 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 11 [2021-12-07 01:51:43,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1817557144] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:51:43,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:51:43,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-12-07 01:51:43,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062729183] [2021-12-07 01:51:43,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:51:43,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-07 01:51:43,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:51:43,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-07 01:51:43,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=803, Unknown=10, NotChecked=0, Total=930 [2021-12-07 01:51:43,663 INFO L87 Difference]: Start difference. First operand 448 states and 559 transitions. Second operand has 22 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:51:44,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:51:44,965 INFO L93 Difference]: Finished difference Result 453 states and 564 transitions. [2021-12-07 01:51:44,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 01:51:44,966 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2021-12-07 01:51:44,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:51:44,967 INFO L225 Difference]: With dead ends: 453 [2021-12-07 01:51:44,968 INFO L226 Difference]: Without dead ends: 434 [2021-12-07 01:51:44,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 96 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=144, Invalid=1106, Unknown=10, NotChecked=0, Total=1260 [2021-12-07 01:51:44,968 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 64 mSDsluCounter, 2609 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 2914 SdHoareTripleChecker+Invalid, 1937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1527 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:51:44,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 2914 Invalid, 1937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 396 Invalid, 0 Unknown, 1527 Unchecked, 0.9s Time] [2021-12-07 01:51:44,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-12-07 01:51:44,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 432. [2021-12-07 01:51:44,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 283 states have (on average 1.7173144876325088) internal successors, (486), 393 states have internal predecessors, (486), 24 states have call successors, (24), 16 states have call predecessors, (24), 19 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-07 01:51:44,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 542 transitions. [2021-12-07 01:51:44,974 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 542 transitions. Word has length 39 [2021-12-07 01:51:44,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:51:44,974 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 542 transitions. [2021-12-07 01:51:44,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:51:44,974 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 542 transitions. [2021-12-07 01:51:44,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-07 01:51:44,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:51:44,974 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-12-07 01:51:44,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2021-12-07 01:51:45,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-12-07 01:51:45,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:51:45,376 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr77ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:51:45,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:51:45,377 INFO L85 PathProgramCache]: Analyzing trace with hash -789046589, now seen corresponding path program 1 times [2021-12-07 01:51:45,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:51:45,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642991469] [2021-12-07 01:51:45,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:51:45,378 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:51:45,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:51:45,381 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:51:45,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-12-07 01:51:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:51:45,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:51:45,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:51:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-07 01:51:45,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:51:45,584 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-07 01:51:45,584 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:51:45,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642991469] [2021-12-07 01:51:45,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642991469] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:51:45,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:51:45,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-12-07 01:51:45,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709104671] [2021-12-07 01:51:45,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:51:45,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:51:45,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:51:45,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:51:45,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:51:45,585 INFO L87 Difference]: Start difference. First operand 432 states and 542 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-07 01:51:45,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:51:45,605 INFO L93 Difference]: Finished difference Result 431 states and 541 transitions. [2021-12-07 01:51:45,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:51:45,605 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2021-12-07 01:51:45,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:51:45,607 INFO L225 Difference]: With dead ends: 431 [2021-12-07 01:51:45,607 INFO L226 Difference]: Without dead ends: 431 [2021-12-07 01:51:45,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 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 01:51:45,607 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 233 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:51:45,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 1050 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:51:45,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-12-07 01:51:45,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 431. [2021-12-07 01:51:45,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 283 states have (on average 1.7137809187279152) internal successors, (485), 392 states have internal predecessors, (485), 24 states have call successors, (24), 16 states have call predecessors, (24), 19 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-07 01:51:45,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 541 transitions. [2021-12-07 01:51:45,613 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 541 transitions. Word has length 41 [2021-12-07 01:51:45,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:51:45,613 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 541 transitions. [2021-12-07 01:51:45,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-07 01:51:45,613 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 541 transitions. [2021-12-07 01:51:45,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-07 01:51:45,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:51:45,614 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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 01:51:45,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (54)] Ended with exit code 0 [2021-12-07 01:51:45,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:51:45,815 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:51:45,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:51:45,816 INFO L85 PathProgramCache]: Analyzing trace with hash -817675940, now seen corresponding path program 1 times [2021-12-07 01:51:45,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:51:45,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845725044] [2021-12-07 01:51:45,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:51:45,818 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:51:45,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:51:45,820 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:51:45,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-12-07 01:51:45,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:51:45,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:51:45,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:51:45,943 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 01:51:45,993 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-07 01:51:45,993 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 01:51:46,002 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 01:51:46,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:51:46,003 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:51:46,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845725044] [2021-12-07 01:51:46,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845725044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:51:46,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:51:46,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:51:46,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418707653] [2021-12-07 01:51:46,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:51:46,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:51:46,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:51:46,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:51:46,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:51:46,004 INFO L87 Difference]: Start difference. First operand 431 states and 541 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-07 01:51:46,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:51:46,741 INFO L93 Difference]: Finished difference Result 485 states and 556 transitions. [2021-12-07 01:51:46,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:51:46,742 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2021-12-07 01:51:46,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:51:46,743 INFO L225 Difference]: With dead ends: 485 [2021-12-07 01:51:46,744 INFO L226 Difference]: Without dead ends: 485 [2021-12-07 01:51:46,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 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 01:51:46,744 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 161 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:51:46,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 870 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 353 Invalid, 0 Unknown, 201 Unchecked, 0.7s Time] [2021-12-07 01:51:46,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-12-07 01:51:46,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 430. [2021-12-07 01:51:46,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 283 states have (on average 1.7102473498233215) internal successors, (484), 391 states have internal predecessors, (484), 24 states have call successors, (24), 16 states have call predecessors, (24), 19 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-07 01:51:46,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 540 transitions. [2021-12-07 01:51:46,749 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 540 transitions. Word has length 41 [2021-12-07 01:51:46,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:51:46,750 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 540 transitions. [2021-12-07 01:51:46,750 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-07 01:51:46,750 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 540 transitions. [2021-12-07 01:51:46,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-07 01:51:46,750 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:51:46,750 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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 01:51:46,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-12-07 01:51:46,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:51:46,951 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:51:46,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:51:46,952 INFO L85 PathProgramCache]: Analyzing trace with hash -817675939, now seen corresponding path program 1 times [2021-12-07 01:51:46,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:51:46,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [299811003] [2021-12-07 01:51:46,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:51:46,954 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:51:46,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:51:46,956 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:51:46,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-12-07 01:51:47,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:51:47,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-07 01:51:47,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:51:47,215 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 01:51:49,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:51:49,335 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 01:51:49,343 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:51:49,343 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 14 treesize of output 14 [2021-12-07 01:51:49,378 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 01:51:49,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:51:51,684 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:51:51,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [299811003] [2021-12-07 01:51:51,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [299811003] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:51:51,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1144593903] [2021-12-07 01:51:51,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:51:51,684 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:51:51,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:51:51,685 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:51:51,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2021-12-07 01:51:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:51:51,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-07 01:51:51,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:51:51,896 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 01:51:51,901 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 01:51:52,063 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:51:52,064 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 18 treesize of output 18 [2021-12-07 01:51:52,069 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 01:51:54,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:51:54,218 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 01:51:54,226 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:51:54,226 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 17 treesize of output 17 [2021-12-07 01:52:00,423 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:52:00,423 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 18 [2021-12-07 01:52:00,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:52:00,699 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-07 01:52:00,699 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 17 treesize of output 26 [2021-12-07 01:52:00,709 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:52:00,709 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 18 treesize of output 18 [2021-12-07 01:52:00,726 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 01:52:00,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:52:02,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1144593903] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:52:02,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:52:02,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15] total 20 [2021-12-07 01:52:02,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898713286] [2021-12-07 01:52:02,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:52:02,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 01:52:02,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:52:02,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 01:52:02,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=424, Unknown=5, NotChecked=0, Total=506 [2021-12-07 01:52:02,916 INFO L87 Difference]: Start difference. First operand 430 states and 540 transitions. Second operand has 21 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 6 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2021-12-07 01:52:13,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:52:13,561 INFO L93 Difference]: Finished difference Result 674 states and 819 transitions. [2021-12-07 01:52:13,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-07 01:52:13,562 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 6 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 41 [2021-12-07 01:52:13,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:52:13,565 INFO L225 Difference]: With dead ends: 674 [2021-12-07 01:52:13,565 INFO L226 Difference]: Without dead ends: 674 [2021-12-07 01:52:13,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=99, Invalid=543, Unknown=8, NotChecked=0, Total=650 [2021-12-07 01:52:13,565 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 812 mSDsluCounter, 3008 mSDsCounter, 0 mSdLazyCounter, 1983 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 3344 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 923 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:52:13,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [822 Valid, 3344 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1983 Invalid, 0 Unknown, 923 Unchecked, 4.5s Time] [2021-12-07 01:52:13,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-12-07 01:52:13,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 426. [2021-12-07 01:52:13,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 280 states have (on average 1.7107142857142856) internal successors, (479), 388 states have internal predecessors, (479), 24 states have call successors, (24), 16 states have call predecessors, (24), 19 states have return successors, (32), 25 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-07 01:52:13,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 535 transitions. [2021-12-07 01:52:13,572 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 535 transitions. Word has length 41 [2021-12-07 01:52:13,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:52:13,572 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 535 transitions. [2021-12-07 01:52:13,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 6 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2021-12-07 01:52:13,572 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 535 transitions. [2021-12-07 01:52:13,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-07 01:52:13,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:52:13,572 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 01:52:13,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2021-12-07 01:52:13,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (57)] Ended with exit code 0 [2021-12-07 01:52:13,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:52:13,974 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr88ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:52:13,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:52:13,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1368793298, now seen corresponding path program 1 times [2021-12-07 01:52:13,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:52:13,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [421797595] [2021-12-07 01:52:13,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:52:13,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:52:13,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:52:13,979 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:52:13,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-12-07 01:52:14,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:52:14,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 01:52:14,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:52:14,080 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 01:52:14,200 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:52:14,200 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 34 treesize of output 41 [2021-12-07 01:52:14,362 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:52:14,363 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 38 treesize of output 45 [2021-12-07 01:52:14,583 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 31 treesize of output 33 [2021-12-07 01:52:14,629 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 27 treesize of output 29 [2021-12-07 01:52:14,647 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 01:52:14,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:52:15,145 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:52:15,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [421797595] [2021-12-07 01:52:15,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [421797595] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:52:15,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1733893732] [2021-12-07 01:52:15,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:52:15,145 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:52:15,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:52:15,146 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:52:15,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2021-12-07 01:52:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:52:15,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 01:52:15,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:52:15,306 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 01:52:15,377 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:52:15,378 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 30 treesize of output 30 [2021-12-07 01:52:15,547 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:52:15,547 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 37 treesize of output 44 [2021-12-07 01:52:15,703 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 31 treesize of output 33 [2021-12-07 01:52:15,759 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 27 treesize of output 29 [2021-12-07 01:52:15,775 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:52:15,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:52:16,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1733893732] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:52:16,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:52:16,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 13 [2021-12-07 01:52:16,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199277497] [2021-12-07 01:52:16,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:52:16,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 01:52:16,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:52:16,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 01:52:16,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-12-07 01:52:16,256 INFO L87 Difference]: Start difference. First operand 426 states and 535 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (4), 2 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 01:52:18,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:52:18,976 INFO L93 Difference]: Finished difference Result 523 states and 598 transitions. [2021-12-07 01:52:18,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 01:52:18,977 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-12-07 01:52:18,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:52:18,979 INFO L225 Difference]: With dead ends: 523 [2021-12-07 01:52:18,979 INFO L226 Difference]: Without dead ends: 523 [2021-12-07 01:52:18,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 84 SyntacticMatches, 22 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-12-07 01:52:18,980 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 220 mSDsluCounter, 1697 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 1991 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 227 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:52:18,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 1991 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 992 Invalid, 0 Unknown, 227 Unchecked, 2.7s Time] [2021-12-07 01:52:18,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-12-07 01:52:18,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 429. [2021-12-07 01:52:18,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 283 states have (on average 1.7031802120141342) internal successors, (482), 391 states have internal predecessors, (482), 24 states have call successors, (24), 16 states have call predecessors, (24), 19 states have return successors, (32), 25 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-07 01:52:18,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 538 transitions. [2021-12-07 01:52:18,986 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 538 transitions. Word has length 41 [2021-12-07 01:52:18,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:52:18,986 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 538 transitions. [2021-12-07 01:52:18,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (4), 2 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 01:52:18,986 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 538 transitions. [2021-12-07 01:52:18,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-07 01:52:18,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:52:18,987 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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 01:52:18,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (58)] Ended with exit code 0 [2021-12-07 01:52:19,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (59)] Ended with exit code 0 [2021-12-07 01:52:19,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:52:19,388 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:52:19,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:52:19,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1309353403, now seen corresponding path program 1 times [2021-12-07 01:52:19,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:52:19,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [412256246] [2021-12-07 01:52:19,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:52:19,391 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:52:19,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:52:19,392 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:52:19,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-12-07 01:52:19,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:52:19,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:52:19,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:52:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-07 01:52:19,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:52:19,578 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:52:19,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [412256246] [2021-12-07 01:52:19,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [412256246] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:52:19,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:52:19,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:52:19,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131231042] [2021-12-07 01:52:19,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:52:19,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:52:19,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:52:19,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:52:19,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:52:19,579 INFO L87 Difference]: Start difference. First operand 429 states and 538 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-07 01:52:19,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:52:19,626 INFO L93 Difference]: Finished difference Result 488 states and 602 transitions. [2021-12-07 01:52:19,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:52:19,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 42 [2021-12-07 01:52:19,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:52:19,628 INFO L225 Difference]: With dead ends: 488 [2021-12-07 01:52:19,628 INFO L226 Difference]: Without dead ends: 488 [2021-12-07 01:52:19,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 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 01:52:19,629 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 53 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1425 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:52:19,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 1425 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:52:19,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-12-07 01:52:19,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 431. [2021-12-07 01:52:19,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 285 states have (on average 1.6982456140350877) internal successors, (484), 392 states have internal predecessors, (484), 24 states have call successors, (24), 16 states have call predecessors, (24), 19 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-07 01:52:19,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 540 transitions. [2021-12-07 01:52:19,635 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 540 transitions. Word has length 42 [2021-12-07 01:52:19,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:52:19,635 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 540 transitions. [2021-12-07 01:52:19,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-07 01:52:19,635 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 540 transitions. [2021-12-07 01:52:19,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-07 01:52:19,635 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:52:19,635 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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 01:52:19,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (60)] Ended with exit code 0 [2021-12-07 01:52:19,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:52:19,837 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr78ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:52:19,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:52:19,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1309359926, now seen corresponding path program 1 times [2021-12-07 01:52:19,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:52:19,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1635192432] [2021-12-07 01:52:19,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:52:19,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:52:19,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:52:19,842 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:52:19,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-12-07 01:52:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:52:19,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:52:19,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:52:20,416 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 01:52:20,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:52:20,569 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-07 01:52:20,569 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:52:20,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1635192432] [2021-12-07 01:52:20,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1635192432] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:52:20,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:52:20,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-07 01:52:20,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074757307] [2021-12-07 01:52:20,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:52:20,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 01:52:20,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:52:20,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 01:52:20,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:52:20,570 INFO L87 Difference]: Start difference. First operand 431 states and 540 transitions. Second operand has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-07 01:52:20,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:52:20,878 INFO L93 Difference]: Finished difference Result 556 states and 619 transitions. [2021-12-07 01:52:20,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:52:20,879 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 42 [2021-12-07 01:52:20,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:52:20,881 INFO L225 Difference]: With dead ends: 556 [2021-12-07 01:52:20,881 INFO L226 Difference]: Without dead ends: 556 [2021-12-07 01:52:20,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:52:20,881 INFO L933 BasicCegarLoop]: 416 mSDtfsCounter, 304 mSDsluCounter, 2065 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 2481 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:52:20,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 2481 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 165 Invalid, 0 Unknown, 181 Unchecked, 0.3s Time] [2021-12-07 01:52:20,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-12-07 01:52:20,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 439. [2021-12-07 01:52:20,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 291 states have (on average 1.6872852233676976) internal successors, (491), 399 states have internal predecessors, (491), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-07 01:52:20,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 547 transitions. [2021-12-07 01:52:20,887 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 547 transitions. Word has length 42 [2021-12-07 01:52:20,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:52:20,887 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 547 transitions. [2021-12-07 01:52:20,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-07 01:52:20,888 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 547 transitions. [2021-12-07 01:52:20,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-07 01:52:20,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:52:20,888 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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 01:52:20,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (61)] Ended with exit code 0 [2021-12-07 01:52:21,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:52:21,089 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:52:21,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:52:21,090 INFO L85 PathProgramCache]: Analyzing trace with hash 421849722, now seen corresponding path program 1 times [2021-12-07 01:52:21,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:52:21,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [762664655] [2021-12-07 01:52:21,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:52:21,092 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:52:21,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:52:21,094 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:52:21,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2021-12-07 01:52:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:52:21,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 01:52:21,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:52:21,307 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 01:52:21,338 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-07 01:52:21,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:52:21,338 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:52:21,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [762664655] [2021-12-07 01:52:21,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [762664655] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:52:21,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:52:21,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:52:21,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587438004] [2021-12-07 01:52:21,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:52:21,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:52:21,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:52:21,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:52:21,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:52:21,339 INFO L87 Difference]: Start difference. First operand 439 states and 547 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-07 01:52:22,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:52:22,084 INFO L93 Difference]: Finished difference Result 444 states and 553 transitions. [2021-12-07 01:52:22,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:52:22,085 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 42 [2021-12-07 01:52:22,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:52:22,087 INFO L225 Difference]: With dead ends: 444 [2021-12-07 01:52:22,087 INFO L226 Difference]: Without dead ends: 444 [2021-12-07 01:52:22,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 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 01:52:22,087 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 14 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:52:22,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 945 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-07 01:52:22,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-12-07 01:52:22,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 438. [2021-12-07 01:52:22,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 291 states have (on average 1.6838487972508591) internal successors, (490), 398 states have internal predecessors, (490), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-07 01:52:22,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 546 transitions. [2021-12-07 01:52:22,093 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 546 transitions. Word has length 42 [2021-12-07 01:52:22,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:52:22,093 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 546 transitions. [2021-12-07 01:52:22,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-07 01:52:22,094 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 546 transitions. [2021-12-07 01:52:22,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-07 01:52:22,094 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:52:22,094 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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 01:52:22,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (62)] Ended with exit code 0 [2021-12-07 01:52:22,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:52:22,295 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:52:22,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:52:22,296 INFO L85 PathProgramCache]: Analyzing trace with hash 421849723, now seen corresponding path program 1 times [2021-12-07 01:52:22,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:52:22,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932776223] [2021-12-07 01:52:22,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:52:22,298 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:52:22,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:52:22,300 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:52:22,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-12-07 01:52:22,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:52:22,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 01:52:22,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:52:22,437 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 01:52:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 01:52:22,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:52:22,520 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:52:22,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932776223] [2021-12-07 01:52:22,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932776223] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:52:22,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:52:22,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:52:22,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615646862] [2021-12-07 01:52:22,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:52:22,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:52:22,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:52:22,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:52:22,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:52:22,521 INFO L87 Difference]: Start difference. First operand 438 states and 546 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-07 01:52:23,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:52:23,619 INFO L93 Difference]: Finished difference Result 493 states and 606 transitions. [2021-12-07 01:52:23,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:52:23,620 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 42 [2021-12-07 01:52:23,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:52:23,622 INFO L225 Difference]: With dead ends: 493 [2021-12-07 01:52:23,622 INFO L226 Difference]: Without dead ends: 493 [2021-12-07 01:52:23,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:52:23,623 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 57 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1424 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:52:23,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 1424 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-07 01:52:23,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-12-07 01:52:23,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 437. [2021-12-07 01:52:23,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 291 states have (on average 1.6804123711340206) internal successors, (489), 397 states have internal predecessors, (489), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-07 01:52:23,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 545 transitions. [2021-12-07 01:52:23,628 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 545 transitions. Word has length 42 [2021-12-07 01:52:23,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:52:23,629 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 545 transitions. [2021-12-07 01:52:23,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-07 01:52:23,629 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 545 transitions. [2021-12-07 01:52:23,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-07 01:52:23,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:52:23,629 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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 01:52:23,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (63)] Ended with exit code 0 [2021-12-07 01:52:23,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:52:23,830 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr79ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:52:23,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:52:23,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1935452453, now seen corresponding path program 1 times [2021-12-07 01:52:23,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:52:23,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698168667] [2021-12-07 01:52:23,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:52:23,833 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:52:23,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:52:23,835 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:52:23,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-12-07 01:52:23,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:52:23,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:52:23,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:52:23,940 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 01:52:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 01:52:24,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:52:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 01:52:24,158 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:52:24,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698168667] [2021-12-07 01:52:24,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698168667] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:52:24,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:52:24,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-12-07 01:52:24,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54087040] [2021-12-07 01:52:24,158 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:52:24,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:52:24,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:52:24,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:52:24,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:52:24,159 INFO L87 Difference]: Start difference. First operand 437 states and 545 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:52:24,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:52:24,876 INFO L93 Difference]: Finished difference Result 442 states and 551 transitions. [2021-12-07 01:52:24,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:52:24,877 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2021-12-07 01:52:24,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:52:24,878 INFO L225 Difference]: With dead ends: 442 [2021-12-07 01:52:24,879 INFO L226 Difference]: Without dead ends: 442 [2021-12-07 01:52:24,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:52:24,879 INFO L933 BasicCegarLoop]: 329 mSDtfsCounter, 0 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:52:24,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1131 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 384 Invalid, 0 Unknown, 156 Unchecked, 0.7s Time] [2021-12-07 01:52:24,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-12-07 01:52:24,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 440. [2021-12-07 01:52:24,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 294 states have (on average 1.6734693877551021) internal successors, (492), 400 states have internal predecessors, (492), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-07 01:52:24,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 548 transitions. [2021-12-07 01:52:24,885 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 548 transitions. Word has length 43 [2021-12-07 01:52:24,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:52:24,889 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 548 transitions. [2021-12-07 01:52:24,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:52:24,889 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 548 transitions. [2021-12-07 01:52:24,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-07 01:52:24,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:52:24,889 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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 01:52:24,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (64)] Ended with exit code 0 [2021-12-07 01:52:25,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:52:25,090 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr79ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:52:25,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:52:25,092 INFO L85 PathProgramCache]: Analyzing trace with hash 192642118, now seen corresponding path program 1 times [2021-12-07 01:52:25,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:52:25,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771620331] [2021-12-07 01:52:25,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:52:25,094 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:52:25,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:52:25,096 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:52:25,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2021-12-07 01:52:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:52:25,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:52:25,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:52:25,234 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-07 01:52:25,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:52:25,234 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:52:25,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771620331] [2021-12-07 01:52:25,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771620331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:52:25,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:52:25,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:52:25,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885824309] [2021-12-07 01:52:25,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:52:25,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:52:25,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:52:25,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:52:25,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:52:25,235 INFO L87 Difference]: Start difference. First operand 440 states and 548 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-07 01:52:25,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:52:25,280 INFO L93 Difference]: Finished difference Result 490 states and 602 transitions. [2021-12-07 01:52:25,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:52:25,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2021-12-07 01:52:25,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:52:25,282 INFO L225 Difference]: With dead ends: 490 [2021-12-07 01:52:25,282 INFO L226 Difference]: Without dead ends: 490 [2021-12-07 01:52:25,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 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 01:52:25,283 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 228 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:52:25,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 1262 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:52:25,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-12-07 01:52:25,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 438. [2021-12-07 01:52:25,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 292 states have (on average 1.6746575342465753) internal successors, (489), 398 states have internal predecessors, (489), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-07 01:52:25,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 545 transitions. [2021-12-07 01:52:25,290 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 545 transitions. Word has length 43 [2021-12-07 01:52:25,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:52:25,290 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 545 transitions. [2021-12-07 01:52:25,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-07 01:52:25,290 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 545 transitions. [2021-12-07 01:52:25,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-07 01:52:25,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:52:25,290 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, 1, 1] [2021-12-07 01:52:25,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2021-12-07 01:52:25,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:52:25,491 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:52:25,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:52:25,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1150380693, now seen corresponding path program 1 times [2021-12-07 01:52:25,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:52:25,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434415564] [2021-12-07 01:52:25,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:52:25,494 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:52:25,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:52:25,496 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:52:25,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2021-12-07 01:52:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:52:25,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-07 01:52:25,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:52:25,746 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:52:25,746 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 21 treesize of output 28 [2021-12-07 01:52:25,900 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:52:25,900 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 23 treesize of output 30 [2021-12-07 01:52:26,124 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:52:26,125 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 23 treesize of output 30 [2021-12-07 01:52:26,935 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 29 treesize of output 31 [2021-12-07 01:52:27,038 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 15 treesize of output 17 [2021-12-07 01:52:27,089 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 15 treesize of output 17 [2021-12-07 01:52:27,101 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 01:52:27,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:52:27,307 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:52:27,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434415564] [2021-12-07 01:52:27,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434415564] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:52:27,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [731115190] [2021-12-07 01:52:27,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:52:27,307 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:52:27,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:52:27,308 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:52:27,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2021-12-07 01:52:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:52:27,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-07 01:52:27,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:52:27,495 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 9 treesize of output 3 [2021-12-07 01:52:27,566 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:52:27,566 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 19 treesize of output 26 [2021-12-07 01:52:27,710 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:52:27,711 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 21 treesize of output 28 [2021-12-07 01:52:28,152 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-07 01:52:28,152 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 32 treesize of output 49 [2021-12-07 01:52:28,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 32 [2021-12-07 01:52:29,247 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-12-07 01:52:29,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 70 [2021-12-07 01:52:30,300 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-07 01:52:30,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 72 treesize of output 90 [2021-12-07 01:52:30,608 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 01:52:30,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:52:35,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [731115190] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:52:35,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:52:35,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17] total 21 [2021-12-07 01:52:35,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631459288] [2021-12-07 01:52:35,823 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:52:35,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-07 01:52:35,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:52:35,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-07 01:52:35,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=737, Unknown=0, NotChecked=0, Total=992 [2021-12-07 01:52:35,824 INFO L87 Difference]: Start difference. First operand 438 states and 545 transitions. Second operand has 23 states, 20 states have (on average 2.4) internal successors, (48), 17 states have internal predecessors, (48), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-07 01:52:39,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:52:39,073 INFO L93 Difference]: Finished difference Result 440 states and 548 transitions. [2021-12-07 01:52:39,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-07 01:52:39,074 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.4) internal successors, (48), 17 states have internal predecessors, (48), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 43 [2021-12-07 01:52:39,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:52:39,076 INFO L225 Difference]: With dead ends: 440 [2021-12-07 01:52:39,076 INFO L226 Difference]: Without dead ends: 440 [2021-12-07 01:52:39,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 66 SyntacticMatches, 16 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=265, Invalid=856, Unknown=1, NotChecked=0, Total=1122 [2021-12-07 01:52:39,076 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 13 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1229 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:52:39,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 1229 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 507 Invalid, 0 Unknown, 202 Unchecked, 1.2s Time] [2021-12-07 01:52:39,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-12-07 01:52:39,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2021-12-07 01:52:39,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 294 states have (on average 1.6734693877551021) internal successors, (492), 400 states have internal predecessors, (492), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-07 01:52:39,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 548 transitions. [2021-12-07 01:52:39,082 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 548 transitions. Word has length 43 [2021-12-07 01:52:39,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:52:39,082 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 548 transitions. [2021-12-07 01:52:39,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.4) internal successors, (48), 17 states have internal predecessors, (48), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-07 01:52:39,082 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 548 transitions. [2021-12-07 01:52:39,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-07 01:52:39,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:52:39,083 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, 1, 1] [2021-12-07 01:52:39,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (67)] Ended with exit code 0 [2021-12-07 01:52:39,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (66)] Ended with exit code 0 [2021-12-07 01:52:39,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:52:39,484 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:52:39,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:52:39,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1150380694, now seen corresponding path program 1 times [2021-12-07 01:52:39,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:52:39,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1122613604] [2021-12-07 01:52:39,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:52:39,487 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:52:39,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:52:39,489 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:52:39,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2021-12-07 01:52:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:52:39,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 01:52:39,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:52:41,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:52:41,831 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 01:52:44,028 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:52:44,028 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 18 [2021-12-07 01:52:52,389 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:52:52,390 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 16 treesize of output 22 [2021-12-07 01:52:54,104 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 15 refuted. 4 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 01:52:54,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:52:54,960 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:52:54,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1122613604] [2021-12-07 01:52:54,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1122613604] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:52:54,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1737747312] [2021-12-07 01:52:54,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:52:54,960 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:52:54,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:52:54,961 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:52:54,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (69)] Waiting until timeout for monitored process [2021-12-07 01:52:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:52:55,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-07 01:52:55,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:52:55,163 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 9 treesize of output 3 [2021-12-07 01:52:55,365 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:52:55,365 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 18 [2021-12-07 01:52:55,403 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:52:55,404 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 19 treesize of output 26 [2021-12-07 01:52:55,839 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:52:55,840 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 01:52:55,849 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 01:52:56,178 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:52:56,178 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 18 [2021-12-07 01:52:56,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-07 01:52:57,305 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 2 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 01:52:57,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:52:57,640 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 34 treesize of output 32 [2021-12-07 01:52:58,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1737747312] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:52:58,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:52:58,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 23 [2021-12-07 01:52:58,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554856183] [2021-12-07 01:52:58,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:52:58,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-07 01:52:58,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:52:58,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-07 01:52:58,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=853, Unknown=6, NotChecked=0, Total=1056 [2021-12-07 01:52:58,483 INFO L87 Difference]: Start difference. First operand 440 states and 548 transitions. Second operand has 25 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 21 states have internal predecessors, (59), 7 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-07 01:53:05,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:53:05,285 INFO L93 Difference]: Finished difference Result 440 states and 547 transitions. [2021-12-07 01:53:05,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-07 01:53:05,286 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 21 states have internal predecessors, (59), 7 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 43 [2021-12-07 01:53:05,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:53:05,288 INFO L225 Difference]: With dead ends: 440 [2021-12-07 01:53:05,288 INFO L226 Difference]: Without dead ends: 440 [2021-12-07 01:53:05,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=329, Invalid=1469, Unknown=8, NotChecked=0, Total=1806 [2021-12-07 01:53:05,289 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 21 mSDsluCounter, 2599 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 2908 SdHoareTripleChecker+Invalid, 1878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 997 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:53:05,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 2908 Invalid, 1878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 873 Invalid, 0 Unknown, 997 Unchecked, 2.0s Time] [2021-12-07 01:53:05,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-12-07 01:53:05,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2021-12-07 01:53:05,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 294 states have (on average 1.6700680272108843) internal successors, (491), 400 states have internal predecessors, (491), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-07 01:53:05,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 547 transitions. [2021-12-07 01:53:05,295 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 547 transitions. Word has length 43 [2021-12-07 01:53:05,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:53:05,295 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 547 transitions. [2021-12-07 01:53:05,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 21 states have internal predecessors, (59), 7 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-07 01:53:05,295 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 547 transitions. [2021-12-07 01:53:05,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-07 01:53:05,295 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:53:05,295 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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 01:53:05,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (68)] Ended with exit code 0 [2021-12-07 01:53:05,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (69)] Ended with exit code 0 [2021-12-07 01:53:05,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:53:05,697 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:53:05,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:53:05,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1670659867, now seen corresponding path program 1 times [2021-12-07 01:53:05,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:53:05,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1033953921] [2021-12-07 01:53:05,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:53:05,700 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:53:05,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:53:05,702 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:53:05,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2021-12-07 01:53:05,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:53:05,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:53:05,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:53:05,932 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 01:53:05,965 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-07 01:53:05,965 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 18 treesize of output 23 [2021-12-07 01:53:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-07 01:53:05,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:53:05,994 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:53:05,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1033953921] [2021-12-07 01:53:05,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1033953921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:53:05,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:53:05,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:53:05,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63876876] [2021-12-07 01:53:05,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:53:05,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:53:05,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:53:05,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:53:05,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:53:05,995 INFO L87 Difference]: Start difference. First operand 440 states and 547 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-07 01:53:06,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:53:06,306 INFO L93 Difference]: Finished difference Result 439 states and 546 transitions. [2021-12-07 01:53:06,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:53:06,307 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2021-12-07 01:53:06,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:53:06,309 INFO L225 Difference]: With dead ends: 439 [2021-12-07 01:53:06,309 INFO L226 Difference]: Without dead ends: 439 [2021-12-07 01:53:06,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 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 01:53:06,309 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 0 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:53:06,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 736 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 115 Invalid, 0 Unknown, 114 Unchecked, 0.3s Time] [2021-12-07 01:53:06,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-12-07 01:53:06,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 439. [2021-12-07 01:53:06,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 294 states have (on average 1.6666666666666667) internal successors, (490), 399 states have internal predecessors, (490), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-07 01:53:06,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 546 transitions. [2021-12-07 01:53:06,315 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 546 transitions. Word has length 44 [2021-12-07 01:53:06,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:53:06,315 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 546 transitions. [2021-12-07 01:53:06,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-07 01:53:06,315 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 546 transitions. [2021-12-07 01:53:06,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-07 01:53:06,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:53:06,316 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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 01:53:06,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (70)] Ended with exit code 0 [2021-12-07 01:53:06,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:53:06,516 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:53:06,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:53:06,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1670659868, now seen corresponding path program 1 times [2021-12-07 01:53:06,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:53:06,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [893009547] [2021-12-07 01:53:06,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:53:06,517 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:53:06,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:53:06,518 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:53:06,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2021-12-07 01:53:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:53:06,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-07 01:53:06,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:53:06,717 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 01:53:06,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:53:06,778 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 01:53:06,791 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:53:06,791 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 15 treesize of output 15 [2021-12-07 01:53:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-07 01:53:06,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:53:07,058 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-07 01:53:07,058 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 16 treesize of output 15 [2021-12-07 01:53:07,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:53:07,582 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 53 treesize of output 49 [2021-12-07 01:53:08,084 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-07 01:53:08,084 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:53:08,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [893009547] [2021-12-07 01:53:08,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [893009547] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:53:08,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:53:08,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-12-07 01:53:08,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527415528] [2021-12-07 01:53:08,085 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:53:08,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-07 01:53:08,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:53:08,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-07 01:53:08,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-07 01:53:08,085 INFO L87 Difference]: Start difference. First operand 439 states and 546 transitions. Second operand has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-07 01:53:09,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:53:09,144 INFO L93 Difference]: Finished difference Result 438 states and 545 transitions. [2021-12-07 01:53:09,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:53:09,145 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 44 [2021-12-07 01:53:09,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:53:09,147 INFO L225 Difference]: With dead ends: 438 [2021-12-07 01:53:09,147 INFO L226 Difference]: Without dead ends: 438 [2021-12-07 01:53:09,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:53:09,147 INFO L933 BasicCegarLoop]: 311 mSDtfsCounter, 262 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 1727 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:53:09,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 1727 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 279 Invalid, 0 Unknown, 192 Unchecked, 1.0s Time] [2021-12-07 01:53:09,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-12-07 01:53:09,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 438. [2021-12-07 01:53:09,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 294 states have (on average 1.663265306122449) internal successors, (489), 398 states have internal predecessors, (489), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-07 01:53:09,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 545 transitions. [2021-12-07 01:53:09,155 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 545 transitions. Word has length 44 [2021-12-07 01:53:09,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:53:09,155 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 545 transitions. [2021-12-07 01:53:09,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-07 01:53:09,156 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 545 transitions. [2021-12-07 01:53:09,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-07 01:53:09,156 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:53:09,156 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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 01:53:09,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2021-12-07 01:53:09,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:53:09,357 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr81ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:53:09,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:53:09,358 INFO L85 PathProgramCache]: Analyzing trace with hash 248981415, now seen corresponding path program 1 times [2021-12-07 01:53:09,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:53:09,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [326056647] [2021-12-07 01:53:09,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:53:09,359 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:53:09,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:53:09,362 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:53:09,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2021-12-07 01:53:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:53:09,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:53:09,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:53:10,080 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 01:53:10,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:53:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-07 01:53:10,258 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:53:10,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [326056647] [2021-12-07 01:53:10,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [326056647] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:53:10,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:53:10,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-07 01:53:10,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659803857] [2021-12-07 01:53:10,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:53:10,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 01:53:10,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:53:10,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 01:53:10,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:53:10,259 INFO L87 Difference]: Start difference. First operand 438 states and 545 transitions. Second operand has 10 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-07 01:53:10,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:53:10,534 INFO L93 Difference]: Finished difference Result 557 states and 619 transitions. [2021-12-07 01:53:10,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:53:10,534 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 45 [2021-12-07 01:53:10,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:53:10,536 INFO L225 Difference]: With dead ends: 557 [2021-12-07 01:53:10,537 INFO L226 Difference]: Without dead ends: 557 [2021-12-07 01:53:10,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:53:10,537 INFO L933 BasicCegarLoop]: 409 mSDtfsCounter, 300 mSDsluCounter, 1367 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 1776 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:53:10,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 1776 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 147 Invalid, 0 Unknown, 127 Unchecked, 0.3s Time] [2021-12-07 01:53:10,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-12-07 01:53:10,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 440. [2021-12-07 01:53:10,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 296 states have (on average 1.6587837837837838) internal successors, (491), 400 states have internal predecessors, (491), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-07 01:53:10,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 547 transitions. [2021-12-07 01:53:10,543 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 547 transitions. Word has length 45 [2021-12-07 01:53:10,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:53:10,543 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 547 transitions. [2021-12-07 01:53:10,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-07 01:53:10,543 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 547 transitions. [2021-12-07 01:53:10,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-07 01:53:10,544 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:53:10,544 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, 1, 1, 1, 1] [2021-12-07 01:53:10,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (72)] Ended with exit code 0 [2021-12-07 01:53:10,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:53:10,745 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:53:10,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:53:10,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1709262998, now seen corresponding path program 1 times [2021-12-07 01:53:10,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:53:10,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1310726557] [2021-12-07 01:53:10,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:53:10,747 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:53:10,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:53:10,749 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:53:10,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2021-12-07 01:53:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:53:10,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-07 01:53:10,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:53:11,018 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-07 01:53:11,019 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 1 case distinctions, treesize of input 17 treesize of output 22 [2021-12-07 01:53:11,254 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-07 01:53:11,254 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 3 case distinctions, treesize of input 32 treesize of output 34 [2021-12-07 01:53:11,391 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:53:11,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-07 01:53:11,396 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 5 treesize of output 3 [2021-12-07 01:53:11,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 20 [2021-12-07 01:53:11,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 01:53:15,512 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 19 treesize of output 11 [2021-12-07 01:53:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:53:15,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:53:15,786 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-12-07 01:53:15,786 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 68 treesize of output 67 [2021-12-07 01:53:16,016 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:53:16,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1310726557] [2021-12-07 01:53:16,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1310726557] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:53:16,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [790443756] [2021-12-07 01:53:16,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:53:16,016 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:53:16,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:53:16,017 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:53:16,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2021-12-07 01:53:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:53:16,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-07 01:53:16,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:53:20,236 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:53:20,237 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 14 treesize of output 23 [2021-12-07 01:53:20,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:53:20,618 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 26 [2021-12-07 01:53:20,895 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:53:20,895 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-12-07 01:53:20,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:53:20,910 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 13 treesize of output 7 [2021-12-07 01:53:21,158 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:53:21,158 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2021-12-07 01:53:21,203 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-07 01:53:21,505 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 01:53:21,675 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-07 01:53:21,675 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 29 treesize of output 15 [2021-12-07 01:53:21,838 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:53:21,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:53:21,899 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-12-07 01:53:21,899 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 66 treesize of output 65 [2021-12-07 01:53:22,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [790443756] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:53:22,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:53:22,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-12-07 01:53:22,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124295749] [2021-12-07 01:53:22,085 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:53:22,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-07 01:53:22,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:53:22,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-07 01:53:22,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=959, Unknown=5, NotChecked=0, Total=1122 [2021-12-07 01:53:22,086 INFO L87 Difference]: Start difference. First operand 440 states and 547 transitions. Second operand has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 24 states have internal predecessors, (64), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-07 01:53:34,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:53:34,459 INFO L93 Difference]: Finished difference Result 472 states and 581 transitions. [2021-12-07 01:53:34,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 01:53:34,460 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 24 states have internal predecessors, (64), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 45 [2021-12-07 01:53:34,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:53:34,462 INFO L225 Difference]: With dead ends: 472 [2021-12-07 01:53:34,462 INFO L226 Difference]: Without dead ends: 472 [2021-12-07 01:53:34,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=263, Invalid=1534, Unknown=9, NotChecked=0, Total=1806 [2021-12-07 01:53:34,462 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 327 mSDsluCounter, 3485 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 3798 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 885 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:53:34,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 3798 Invalid, 1908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 992 Invalid, 0 Unknown, 885 Unchecked, 3.4s Time] [2021-12-07 01:53:34,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-12-07 01:53:34,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 458. [2021-12-07 01:53:34,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 314 states have (on average 1.6687898089171975) internal successors, (524), 418 states have internal predecessors, (524), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (31), 26 states have call predecessors, (31), 24 states have call successors, (31) [2021-12-07 01:53:34,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 579 transitions. [2021-12-07 01:53:34,468 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 579 transitions. Word has length 45 [2021-12-07 01:53:34,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:53:34,468 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 579 transitions. [2021-12-07 01:53:34,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 24 states have internal predecessors, (64), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-07 01:53:34,468 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 579 transitions. [2021-12-07 01:53:34,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-07 01:53:34,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:53:34,468 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, 1, 1, 1, 1] [2021-12-07 01:53:34,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (73)] Ended with exit code 0 [2021-12-07 01:53:34,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (74)] Ended with exit code 0 [2021-12-07 01:53:34,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:53:34,870 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:53:34,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:53:34,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1709262999, now seen corresponding path program 1 times [2021-12-07 01:53:34,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:53:34,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [544719326] [2021-12-07 01:53:34,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:53:34,873 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:53:34,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:53:34,875 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:53:34,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2021-12-07 01:53:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:53:35,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-07 01:53:35,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:53:35,692 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:53:35,692 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 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-07 01:53:35,702 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 5 treesize of output 3 [2021-12-07 01:53:35,748 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:53:35,748 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 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-07 01:53:35,758 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 5 treesize of output 3 [2021-12-07 01:53:35,891 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 01:53:36,268 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-07 01:53:36,269 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 1 case distinctions, treesize of input 23 treesize of output 26 [2021-12-07 01:53:36,298 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-07 01:53:36,298 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 1 case distinctions, treesize of input 23 treesize of output 26 [2021-12-07 01:53:36,551 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 01:53:37,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-07 01:53:38,375 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:53:38,375 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-12-07 01:53:38,386 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-07 01:53:38,387 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-12-07 01:53:38,405 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:53:38,405 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 18 treesize of output 18 [2021-12-07 01:53:38,586 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 01:53:38,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:53:38,959 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 26 treesize of output 24 [2021-12-07 01:53:40,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:53:40,546 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 137 treesize of output 141 [2021-12-07 01:53:42,236 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:53:42,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [544719326] [2021-12-07 01:53:42,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [544719326] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:53:42,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1759867056] [2021-12-07 01:53:42,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:53:42,236 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:53:42,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:53:42,237 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:53:42,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (76)] Waiting until timeout for monitored process [2021-12-07 01:53:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:53:42,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-07 01:53:42,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:53:43,163 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:53:43,164 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-12-07 01:53:43,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:53:43,186 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 13 treesize of output 7 [2021-12-07 01:53:43,226 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:53:43,226 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-07 01:53:43,231 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 5 treesize of output 3 [2021-12-07 01:53:43,416 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 01:53:43,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:53:43,851 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-07 01:53:43,851 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 39 [2021-12-07 01:53:43,880 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-07 01:53:43,881 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-12-07 01:53:44,254 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 01:53:45,630 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 01:53:46,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:53:46,356 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 32 [2021-12-07 01:53:46,367 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-07 01:53:46,368 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 26 treesize of output 14 [2021-12-07 01:53:46,386 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:53:46,387 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 16 treesize of output 16 [2021-12-07 01:53:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 01:53:46,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:53:46,622 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 26 treesize of output 24 [2021-12-07 01:53:47,438 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:53:47,439 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 137 treesize of output 141 [2021-12-07 01:53:48,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1759867056] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:53:48,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:53:48,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 28 [2021-12-07 01:53:48,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962519683] [2021-12-07 01:53:48,930 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:53:48,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-07 01:53:48,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:53:48,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-07 01:53:48,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2021-12-07 01:53:48,930 INFO L87 Difference]: Start difference. First operand 458 states and 579 transitions. Second operand has 30 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 23 states have internal predecessors, (67), 7 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-07 01:53:50,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:53:50,996 INFO L93 Difference]: Finished difference Result 460 states and 581 transitions. [2021-12-07 01:53:50,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-07 01:53:50,997 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 23 states have internal predecessors, (67), 7 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 45 [2021-12-07 01:53:50,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:53:50,998 INFO L225 Difference]: With dead ends: 460 [2021-12-07 01:53:50,998 INFO L226 Difference]: Without dead ends: 460 [2021-12-07 01:53:50,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 98 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=317, Invalid=2233, Unknown=0, NotChecked=0, Total=2550 [2021-12-07 01:53:50,999 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 34 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 339 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:53:50,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1445 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 233 Invalid, 0 Unknown, 339 Unchecked, 0.7s Time] [2021-12-07 01:53:51,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-12-07 01:53:51,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 460. [2021-12-07 01:53:51,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 316 states have (on average 1.6645569620253164) internal successors, (526), 420 states have internal predecessors, (526), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (31), 26 states have call predecessors, (31), 24 states have call successors, (31) [2021-12-07 01:53:51,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 581 transitions. [2021-12-07 01:53:51,005 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 581 transitions. Word has length 45 [2021-12-07 01:53:51,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:53:51,005 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 581 transitions. [2021-12-07 01:53:51,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 23 states have internal predecessors, (67), 7 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-07 01:53:51,005 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 581 transitions. [2021-12-07 01:53:51,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-07 01:53:51,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:53:51,006 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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 01:53:51,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (76)] Ended with exit code 0 [2021-12-07 01:53:51,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (75)] Ended with exit code 0 [2021-12-07 01:53:51,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:53:51,406 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr82ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:53:51,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:53:51,406 INFO L85 PathProgramCache]: Analyzing trace with hash -871510309, now seen corresponding path program 1 times [2021-12-07 01:53:51,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:53:51,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1508144646] [2021-12-07 01:53:51,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:53:51,407 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:53:51,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:53:51,408 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:53:51,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2021-12-07 01:53:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:53:51,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-07 01:53:51,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:53:51,545 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 01:53:51,655 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:53:51,655 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 01:53:51,823 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 15 treesize of output 17 [2021-12-07 01:53:51,849 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-07 01:53:51,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:53:51,947 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:53:51,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1508144646] [2021-12-07 01:53:51,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1508144646] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:53:51,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [290122983] [2021-12-07 01:53:51,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:53:51,947 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:53:51,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:53:51,948 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:53:51,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (78)] Waiting until timeout for monitored process [2021-12-07 01:53:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:53:52,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-07 01:53:52,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:53:52,172 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 01:53:52,255 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:53:52,255 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 01:53:52,443 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:53:52,443 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 39 treesize of output 48 [2021-12-07 01:53:52,488 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-07 01:53:52,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:53:52,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [290122983] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:53:52,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:53:52,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-12-07 01:53:52,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204680630] [2021-12-07 01:53:52,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:53:52,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 01:53:52,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:53:52,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 01:53:52,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:53:52,584 INFO L87 Difference]: Start difference. First operand 460 states and 581 transitions. Second operand has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:53:54,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:53:54,157 INFO L93 Difference]: Finished difference Result 464 states and 585 transitions. [2021-12-07 01:53:54,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:53:54,158 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2021-12-07 01:53:54,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:53:54,160 INFO L225 Difference]: With dead ends: 464 [2021-12-07 01:53:54,160 INFO L226 Difference]: Without dead ends: 464 [2021-12-07 01:53:54,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 91 SyntacticMatches, 11 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:53:54,160 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 46 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1312 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 357 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:53:54,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 1312 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 548 Invalid, 0 Unknown, 357 Unchecked, 1.5s Time] [2021-12-07 01:53:54,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-12-07 01:53:54,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 460. [2021-12-07 01:53:54,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 316 states have (on average 1.6613924050632911) internal successors, (525), 420 states have internal predecessors, (525), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (31), 26 states have call predecessors, (31), 24 states have call successors, (31) [2021-12-07 01:53:54,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 580 transitions. [2021-12-07 01:53:54,166 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 580 transitions. Word has length 46 [2021-12-07 01:53:54,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:53:54,166 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 580 transitions. [2021-12-07 01:53:54,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:53:54,166 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 580 transitions. [2021-12-07 01:53:54,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-07 01:53:54,167 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:53:54,167 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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 01:53:54,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (78)] Ended with exit code 0 [2021-12-07 01:53:54,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (77)] Ended with exit code 0 [2021-12-07 01:53:54,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:53:54,568 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:53:54,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:53:54,569 INFO L85 PathProgramCache]: Analyzing trace with hash -813633540, now seen corresponding path program 1 times [2021-12-07 01:53:54,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:53:54,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526629] [2021-12-07 01:53:54,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:53:54,571 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:53:54,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:53:54,573 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:53:54,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2021-12-07 01:53:54,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:53:54,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-07 01:53:54,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:53:54,810 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 01:53:54,883 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:53:54,883 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 01:53:54,930 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 01:53:56,968 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_90| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_39| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_90| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_90|) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_39|)))) is different from true [2021-12-07 01:53:56,976 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 01:53:57,058 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:53:57,058 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 01:53:57,106 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 14 treesize of output 8 [2021-12-07 01:54:03,323 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-07 01:54:03,323 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 38 [2021-12-07 01:54:03,421 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-07 01:54:03,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 33 [2021-12-07 01:54:03,477 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 25 treesize of output 17 [2021-12-07 01:54:07,652 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-12-07 01:54:07,652 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 42 treesize of output 63 [2021-12-07 01:54:07,934 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-07 01:54:07,934 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 1 case distinctions, treesize of input 44 treesize of output 35 [2021-12-07 01:54:08,037 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 39 treesize of output 37 [2021-12-07 01:54:08,133 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-12-07 01:54:08,133 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 32 treesize of output 43 [2021-12-07 01:54:08,250 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 01:54:08,436 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 14 not checked. [2021-12-07 01:54:08,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:54:08,768 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1420 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1421 (_ BitVec 1)) (|v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_12| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg v_ArrVal_1421))) (_ bv1 1)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_12| v_ArrVal_1421) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1420) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))))))))) (_ bv1 1))))) is different from false [2021-12-07 01:54:08,792 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1420 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1419 (_ BitVec 32)) (v_ArrVal_1421 (_ BitVec 1)) (|v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_12| (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_12| v_ArrVal_1421) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)) v_ArrVal_1419)) |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1420) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg v_ArrVal_1421))) (_ bv1 1)))))) is different from false [2021-12-07 01:54:08,829 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1420 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1419 (_ BitVec 32)) (v_ArrVal_1421 (_ BitVec 1)) (|v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_12| (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_12| v_ArrVal_1421) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)) v_ArrVal_1419)) |c_ULTIMATE.start_entry_point_#t~ret69#1.base| v_ArrVal_1420) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg v_ArrVal_1421))) (_ bv1 1)))))) is different from false [2021-12-07 01:54:08,925 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ldv_malloc_#res.base_410| (_ BitVec 32)) (v_ArrVal_1420 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1419 (_ BitVec 32)) (v_ArrVal_1424 (_ BitVec 1)) (v_ArrVal_1421 (_ BitVec 1)) (|v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_12| (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store (store |c_#valid| |v_ldv_malloc_#res.base_410| v_ArrVal_1424) |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_12| v_ArrVal_1421) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)) v_ArrVal_1419)) |v_ldv_malloc_#res.base_410| v_ArrVal_1420) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))))))))) (_ bv1 1))) (not (= (_ bv0 1) (select |c_#valid| |v_ldv_malloc_#res.base_410|))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg v_ArrVal_1421))) (_ bv1 1)))))) is different from false [2021-12-07 01:54:08,927 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:54:08,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [526629] [2021-12-07 01:54:08,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [526629] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:54:08,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [463601017] [2021-12-07 01:54:08,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:54:08,928 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:54:08,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:54:08,928 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:54:08,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (80)] Waiting until timeout for monitored process [2021-12-07 01:54:09,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:54:09,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-07 01:54:09,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:54:09,287 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 01:54:09,599 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:54:09,600 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 18 treesize of output 18 [2021-12-07 01:54:09,777 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 01:54:11,869 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_94| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_94| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_94|) (_ bv0 32))))) is different from true [2021-12-07 01:54:12,023 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:54:12,023 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 31 treesize of output 32 [2021-12-07 01:54:12,114 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 01:54:28,635 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-07 01:54:28,635 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 38 [2021-12-07 01:54:28,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:54:28,761 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 35 treesize of output 30 [2021-12-07 01:54:28,856 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 01:54:35,173 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-12-07 01:54:35,173 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 35 treesize of output 56 [2021-12-07 01:54:35,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:54:35,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 48 treesize of output 39 [2021-12-07 01:54:35,914 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 41 treesize of output 39 [2021-12-07 01:54:36,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:54:36,203 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-12-07 01:54:36,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 63 [2021-12-07 01:54:36,559 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 40 treesize of output 24 [2021-12-07 01:54:37,491 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 14 not checked. [2021-12-07 01:54:37,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:54:39,910 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_13| (_ BitVec 32)) (v_ArrVal_1478 (_ BitVec 1)) (v_ArrVal_1477 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (bvadd (bvneg (bvneg v_ArrVal_1478)) (_ bv1 1)))) (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_13|)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_13| v_ArrVal_1478) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1477) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)))))))))) (_ bv1 1))))) is different from false [2021-12-07 01:54:39,974 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_13| (_ BitVec 32)) (v_ArrVal_1476 (_ BitVec 32)) (v_ArrVal_1478 (_ BitVec 1)) (v_ArrVal_1477 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (bvadd (bvneg (bvneg v_ArrVal_1478)) (_ bv1 1)))) (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_13|)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_13| v_ArrVal_1478) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)) v_ArrVal_1476)) |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1477) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)))))))))) (_ bv1 1))))) is different from false [2021-12-07 01:54:40,086 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_13| (_ BitVec 32)) (v_ArrVal_1476 (_ BitVec 32)) (v_ArrVal_1478 (_ BitVec 1)) (v_ArrVal_1477 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (bvadd (bvneg (bvneg v_ArrVal_1478)) (_ bv1 1)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_13| v_ArrVal_1478) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)) v_ArrVal_1476)) |c_ULTIMATE.start_entry_point_#t~ret69#1.base| v_ArrVal_1477) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)))))))))))) (_ bv1 1))) (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_13|)))) is different from false [2021-12-07 01:54:40,271 WARN L838 $PredicateComparison]: unable to prove that (forall ((|#StackHeapBarrier| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_13| (_ BitVec 32)) (v_ArrVal_1476 (_ BitVec 32)) (|v_ldv_malloc_#res.base_413| (_ BitVec 32)) (v_ArrVal_1478 (_ BitVec 1)) (v_ArrVal_1477 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (bvadd (bvneg (bvneg v_ArrVal_1478)) (_ bv1 1)))) (not (bvult |v_ldv_malloc_#res.base_413| |#StackHeapBarrier|)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store (store |c_#valid| |v_ldv_malloc_#res.base_413| (_ bv1 1)) |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_13| v_ArrVal_1478) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)) v_ArrVal_1476)) |v_ldv_malloc_#res.base_413| v_ArrVal_1477) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))))))))))))) (_ bv1 1))) (not (= (bvneg (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_413|)))) (_ bv0 1))) (not (bvult |#StackHeapBarrier| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_13|)))) is different from false [2021-12-07 01:54:40,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [463601017] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:54:40,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:54:40,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-12-07 01:54:40,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449543340] [2021-12-07 01:54:40,275 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:54:40,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-07 01:54:40,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:54:40,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-07 01:54:40,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1640, Unknown=18, NotChecked=910, Total=2756 [2021-12-07 01:54:40,276 INFO L87 Difference]: Start difference. First operand 460 states and 580 transitions. Second operand has 40 states, 38 states have (on average 1.736842105263158) internal successors, (66), 34 states have internal predecessors, (66), 9 states have call successors, (9), 6 states have call predecessors, (9), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-07 01:54:42,400 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_94| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_94| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_94|) (_ bv0 32))))) (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_90| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_39| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_90| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_90|) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_39|))))) is different from true [2021-12-07 01:54:55,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:54:55,353 INFO L93 Difference]: Finished difference Result 461 states and 582 transitions. [2021-12-07 01:54:55,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-07 01:54:55,354 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 1.736842105263158) internal successors, (66), 34 states have internal predecessors, (66), 9 states have call successors, (9), 6 states have call predecessors, (9), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 46 [2021-12-07 01:54:55,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:54:55,356 INFO L225 Difference]: With dead ends: 461 [2021-12-07 01:54:55,356 INFO L226 Difference]: Without dead ends: 461 [2021-12-07 01:54:55,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 48 SyntacticMatches, 10 SemanticMatches, 56 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 56.9s TimeCoverageRelationStatistics Valid=222, Invalid=1963, Unknown=21, NotChecked=1100, Total=3306 [2021-12-07 01:54:55,357 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 10 mSDsluCounter, 3941 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 4257 SdHoareTripleChecker+Invalid, 1948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1618 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:54:55,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 4257 Invalid, 1948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 324 Invalid, 0 Unknown, 1618 Unchecked, 0.8s Time] [2021-12-07 01:54:55,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-12-07 01:54:55,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 459. [2021-12-07 01:54:55,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 316 states have (on average 1.6582278481012658) internal successors, (524), 419 states have internal predecessors, (524), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (31), 26 states have call predecessors, (31), 24 states have call successors, (31) [2021-12-07 01:54:55,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 579 transitions. [2021-12-07 01:54:55,366 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 579 transitions. Word has length 46 [2021-12-07 01:54:55,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:54:55,366 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 579 transitions. [2021-12-07 01:54:55,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 1.736842105263158) internal successors, (66), 34 states have internal predecessors, (66), 9 states have call successors, (9), 6 states have call predecessors, (9), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-07 01:54:55,366 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 579 transitions. [2021-12-07 01:54:55,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-07 01:54:55,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:54:55,367 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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 01:54:55,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (80)] Ended with exit code 0 [2021-12-07 01:54:55,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (79)] Ended with exit code 0 [2021-12-07 01:54:55,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:54:55,768 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:54:55,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:54:55,769 INFO L85 PathProgramCache]: Analyzing trace with hash -813633539, now seen corresponding path program 1 times [2021-12-07 01:54:55,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:54:55,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619325734] [2021-12-07 01:54:55,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:54:55,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:54:55,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:54:55,774 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:54:55,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2021-12-07 01:54:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:54:56,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-07 01:54:56,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:54:56,011 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 01:54:56,101 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 01:54:56,217 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:54:56,217 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 01:54:56,388 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 01:54:56,412 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 01:54:56,490 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 34 treesize of output 26 [2021-12-07 01:54:56,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 01:54:56,826 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-07 01:54:56,826 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 45 treesize of output 62 [2021-12-07 01:54:56,838 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 12 treesize of output 14 [2021-12-07 01:54:57,010 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:54:57,010 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 75 treesize of output 68 [2021-12-07 01:54:57,018 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 18 treesize of output 20 [2021-12-07 01:54:57,131 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 01:54:57,138 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 25 treesize of output 17 [2021-12-07 01:54:57,449 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-12-07 01:54:57,450 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 46 treesize of output 67 [2021-12-07 01:54:57,460 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 01:54:57,636 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-07 01:54:57,636 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-07 01:54:57,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:54:57,647 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 51 treesize of output 38 [2021-12-07 01:54:57,729 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 01:54:57,735 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 26 treesize of output 18 [2021-12-07 01:54:57,975 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-07 01:54:57,975 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 1 case distinctions, treesize of input 16 treesize of output 26 [2021-12-07 01:54:58,030 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-07 01:54:58,030 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 01:54:58,355 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-07 01:54:58,355 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 1 case distinctions, treesize of input 46 treesize of output 33 [2021-12-07 01:54:58,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:54:58,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-07 01:54:58,408 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 39 treesize of output 35 [2021-12-07 01:54:58,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 01:54:58,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:54:58,515 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 16 treesize of output 18 [2021-12-07 01:54:58,632 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 01:54:58,638 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 01:54:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 01:54:58,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:54:59,776 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_14| (_ BitVec 32))) (or (and (forall ((v_ArrVal_1545 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1545) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))) (bvule .cse0 (bvadd .cse0 (_ bv4 32))))) (forall ((v_ArrVal_1546 (_ BitVec 32)) (v_ArrVal_1544 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1545 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1545) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|) (_ bv4 32)) (select (store |c_#length| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_14| v_ArrVal_1546) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1544) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))))) (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_14|)))) is different from false [2021-12-07 01:54:59,881 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_14| (_ BitVec 32))) (or (and (forall ((v_ArrVal_1542 (_ BitVec 32)) (v_ArrVal_1546 (_ BitVec 32)) (v_ArrVal_1544 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1545 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1541 (_ BitVec 32))) (let ((.cse0 (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)))) (bvule (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base|) .cse0 v_ArrVal_1541)) |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1545) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)) (select (store |c_#length| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_14| v_ArrVal_1546) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) .cse0 v_ArrVal_1542)) |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1544) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))))) (forall ((v_ArrVal_1545 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1541 (_ BitVec 32))) (let ((.cse1 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)) v_ArrVal_1541)) |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1545) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))) (bvule .cse1 (bvadd (_ bv4 32) .cse1))))) (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_14|)))) is different from false [2021-12-07 01:55:00,016 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_14| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_14|)) (and (forall ((v_ArrVal_1542 (_ BitVec 32)) (v_ArrVal_1546 (_ BitVec 32)) (v_ArrVal_1544 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1545 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1541 (_ BitVec 32))) (let ((.cse0 (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)))) (bvule (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base|) .cse0 v_ArrVal_1541)) |c_ULTIMATE.start_entry_point_#t~ret69#1.base| v_ArrVal_1545) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)) (select (store |c_#length| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_14| v_ArrVal_1546) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) .cse0 v_ArrVal_1542)) |c_ULTIMATE.start_entry_point_#t~ret69#1.base| v_ArrVal_1544) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))))) (forall ((v_ArrVal_1545 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1541 (_ BitVec 32))) (let ((.cse1 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)) v_ArrVal_1541)) |c_ULTIMATE.start_entry_point_#t~ret69#1.base| v_ArrVal_1545) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))) (bvule .cse1 (bvadd (_ bv4 32) .cse1))))))) is different from false [2021-12-07 01:55:02,890 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:55:02,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619325734] [2021-12-07 01:55:02,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619325734] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:55:02,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [242219000] [2021-12-07 01:55:02,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:55:02,890 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:55:02,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:55:02,891 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:55:02,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2021-12-07 01:55:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:55:03,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-07 01:55:03,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:55:03,282 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 01:55:03,576 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 01:55:03,754 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:55:03,754 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 01:55:04,058 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 01:55:04,067 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 01:55:04,228 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 32 treesize of output 24 [2021-12-07 01:55:04,234 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 01:55:06,719 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-07 01:55:06,720 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 37 treesize of output 54 [2021-12-07 01:55:06,728 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 12 treesize of output 14 [2021-12-07 01:55:06,972 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:55:06,973 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 66 treesize of output 61 [2021-12-07 01:55:06,978 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-07 01:55:07,165 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 31 treesize of output 23 [2021-12-07 01:55:07,172 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 01:55:09,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:55:09,656 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 16 treesize of output 18 [2021-12-07 01:55:09,707 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-12-07 01:55:09,707 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 45 treesize of output 66 [2021-12-07 01:55:10,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:55:10,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 53 treesize of output 40 [2021-12-07 01:55:10,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:55:10,129 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 21 treesize of output 20 [2021-12-07 01:55:10,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2021-12-07 01:55:10,369 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 01:55:11,628 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-07 01:55:11,628 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 1 case distinctions, treesize of input 16 treesize of output 26 [2021-12-07 01:55:11,750 INFO L354 Elim1Store]: treesize reduction 57, result has 44.1 percent of original size [2021-12-07 01:55:11,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 83 [2021-12-07 01:55:12,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:55:12,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 60 treesize of output 43 [2021-12-07 01:55:13,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:55:13,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-07 01:55:13,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 59 treesize of output 53 [2021-12-07 01:55:13,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 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 01:55:13,885 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-12-07 01:55:13,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 63 [2021-12-07 01:55:13,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 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 01:55:14,298 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 01:55:14,302 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 01:55:14,565 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:55:14,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:55:30,305 WARN L838 $PredicateComparison]: unable to prove that (forall ((|#StackHeapBarrier| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_15| (_ BitVec 32)) (|v_ldv_malloc_#res.base_419| (_ BitVec 32)) (v_ArrVal_1623 (_ BitVec 1))) (or (not (bvult |v_ldv_malloc_#res.base_419| |#StackHeapBarrier|)) (and (forall ((v_ArrVal_1616 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1613 (_ BitVec 32))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)) v_ArrVal_1613)) |v_ldv_malloc_#res.base_419| v_ArrVal_1616) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_1622 (_ BitVec 32)) (v_ArrVal_1611 (_ BitVec 32)) (v_ArrVal_1616 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1613 (_ BitVec 32)) (v_ArrVal_1617 (_ BitVec 32)) (v_ArrVal_1615 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)))) (bvule (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base|) .cse1 v_ArrVal_1613)) |v_ldv_malloc_#res.base_419| v_ArrVal_1616) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)) (select (store (store |c_#length| |v_ldv_malloc_#res.base_419| v_ArrVal_1622) |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_15| v_ArrVal_1617) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) .cse1 v_ArrVal_1611)) |v_ldv_malloc_#res.base_419| v_ArrVal_1615) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)))))) (not (= (_ bv0 1) (select (store |c_#valid| |v_ldv_malloc_#res.base_419| v_ArrVal_1623) |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_15|))) (not (bvult |#StackHeapBarrier| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_15|)) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_419|))))))) is different from false [2021-12-07 01:55:30,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [242219000] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:55:30,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:55:30,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 39 [2021-12-07 01:55:30,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779310715] [2021-12-07 01:55:30,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:55:30,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-07 01:55:30,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:55:30,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-07 01:55:30,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2128, Unknown=56, NotChecked=388, Total=2756 [2021-12-07 01:55:30,313 INFO L87 Difference]: Start difference. First operand 459 states and 579 transitions. Second operand has 40 states, 38 states have (on average 1.631578947368421) internal successors, (62), 33 states have internal predecessors, (62), 8 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-07 01:55:39,701 WARN L227 SmtUtils]: Spent 8.15s on a formula simplification. DAG size of input: 91 DAG size of output: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 01:55:46,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:55:46,303 INFO L93 Difference]: Finished difference Result 460 states and 581 transitions. [2021-12-07 01:55:46,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-07 01:55:46,304 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 1.631578947368421) internal successors, (62), 33 states have internal predecessors, (62), 8 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) Word has length 46 [2021-12-07 01:55:46,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:55:46,305 INFO L225 Difference]: With dead ends: 460 [2021-12-07 01:55:46,305 INFO L226 Difference]: Without dead ends: 460 [2021-12-07 01:55:46,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 51 SyntacticMatches, 10 SemanticMatches, 63 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 39.3s TimeCoverageRelationStatistics Valid=311, Invalid=3309, Unknown=56, NotChecked=484, Total=4160 [2021-12-07 01:55:46,306 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 23 mSDsluCounter, 3932 mSDsCounter, 0 mSdLazyCounter, 1922 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 4245 SdHoareTripleChecker+Invalid, 3046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1113 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:55:46,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 4245 Invalid, 3046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1922 Invalid, 0 Unknown, 1113 Unchecked, 4.9s Time] [2021-12-07 01:55:46,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-12-07 01:55:46,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 458. [2021-12-07 01:55:46,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 316 states have (on average 1.6550632911392404) internal successors, (523), 418 states have internal predecessors, (523), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (31), 26 states have call predecessors, (31), 24 states have call successors, (31) [2021-12-07 01:55:46,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 578 transitions. [2021-12-07 01:55:46,312 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 578 transitions. Word has length 46 [2021-12-07 01:55:46,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:55:46,313 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 578 transitions. [2021-12-07 01:55:46,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 1.631578947368421) internal successors, (62), 33 states have internal predecessors, (62), 8 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-07 01:55:46,313 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 578 transitions. [2021-12-07 01:55:46,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-07 01:55:46,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:55:46,313 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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 01:55:46,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2021-12-07 01:55:46,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (82)] Forceful destruction successful, exit code 0 [2021-12-07 01:55:46,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:55:46,715 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr84ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:55:46,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:55:46,716 INFO L85 PathProgramCache]: Analyzing trace with hash -2770755, now seen corresponding path program 1 times [2021-12-07 01:55:46,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:55:46,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808904161] [2021-12-07 01:55:46,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:55:46,718 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:55:46,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:55:46,720 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:55:46,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2021-12-07 01:55:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:55:46,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:55:46,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:55:47,578 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 01:55:47,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:55:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-07 01:55:47,817 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:55:47,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808904161] [2021-12-07 01:55:47,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808904161] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:55:47,818 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:55:47,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-07 01:55:47,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714009996] [2021-12-07 01:55:47,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:55:47,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 01:55:47,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:55:47,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 01:55:47,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:55:47,819 INFO L87 Difference]: Start difference. First operand 458 states and 578 transitions. Second operand has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-07 01:55:47,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:55:47,835 INFO L93 Difference]: Finished difference Result 460 states and 580 transitions. [2021-12-07 01:55:47,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:55:47,836 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 48 [2021-12-07 01:55:47,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:55:47,837 INFO L225 Difference]: With dead ends: 460 [2021-12-07 01:55:47,837 INFO L226 Difference]: Without dead ends: 460 [2021-12-07 01:55:47,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:55:47,838 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 33 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:55:47,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 1482 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 104 Unchecked, 0.0s Time] [2021-12-07 01:55:47,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-12-07 01:55:47,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 458. [2021-12-07 01:55:47,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 316 states have (on average 1.6518987341772151) internal successors, (522), 418 states have internal predecessors, (522), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (31), 26 states have call predecessors, (31), 24 states have call successors, (31) [2021-12-07 01:55:47,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 577 transitions. [2021-12-07 01:55:47,844 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 577 transitions. Word has length 48 [2021-12-07 01:55:47,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:55:47,844 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 577 transitions. [2021-12-07 01:55:47,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-07 01:55:47,844 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 577 transitions. [2021-12-07 01:55:47,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-07 01:55:47,845 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:55:47,845 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:55:47,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (83)] Ended with exit code 0 [2021-12-07 01:55:48,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:55:48,046 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr94REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:55:48,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:55:48,046 INFO L85 PathProgramCache]: Analyzing trace with hash -477908374, now seen corresponding path program 1 times [2021-12-07 01:55:48,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:55:48,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151649037] [2021-12-07 01:55:48,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:55:48,046 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:55:48,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:55:48,047 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:55:48,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2021-12-07 01:55:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:55:48,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-07 01:55:48,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:55:48,425 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-07 01:55:48,426 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 1 case distinctions, treesize of input 14 treesize of output 19 [2021-12-07 01:55:48,740 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-07 01:55:48,740 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 3 case distinctions, treesize of input 23 treesize of output 25 [2021-12-07 01:55:48,950 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:55:48,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-07 01:55:48,960 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 5 treesize of output 3 [2021-12-07 01:55:49,009 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:55:49,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-07 01:55:49,015 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 5 treesize of output 3 [2021-12-07 01:55:49,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 20 [2021-12-07 01:55:49,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 20 [2021-12-07 01:55:49,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-07 01:55:53,943 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 19 treesize of output 11 [2021-12-07 01:55:53,948 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 19 treesize of output 11 [2021-12-07 01:55:53,963 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:55:53,964 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 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-07 01:55:54,124 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:55:54,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:55:54,329 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 01:55:54,704 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:55:54,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151649037] [2021-12-07 01:55:54,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151649037] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:55:54,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1528783562] [2021-12-07 01:55:54,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:55:54,705 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:55:54,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:55:54,705 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:55:54,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (85)] Waiting until timeout for monitored process [2021-12-07 01:55:54,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:55:54,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-07 01:55:54,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:55:59,359 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:55:59,359 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 14 treesize of output 23 [2021-12-07 01:55:59,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:55:59,838 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 18 treesize of output 22 [2021-12-07 01:56:00,174 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:56:00,174 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-07 01:56:00,179 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 5 treesize of output 3 [2021-12-07 01:56:00,222 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:56:00,222 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-12-07 01:56:00,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:56:00,232 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 13 treesize of output 7 [2021-12-07 01:56:00,594 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:56:00,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2021-12-07 01:56:00,626 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:56:00,627 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2021-12-07 01:56:01,154 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 01:56:01,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:56:01,394 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-12-07 01:56:01,400 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 26 treesize of output 18 [2021-12-07 01:56:01,418 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:56:01,419 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 15 treesize of output 15 [2021-12-07 01:56:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:56:01,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:56:01,550 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 26 treesize of output 24 [2021-12-07 01:56:01,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1528783562] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:56:01,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:56:01,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-12-07 01:56:01,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308732980] [2021-12-07 01:56:01,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:56:01,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-07 01:56:01,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:56:01,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-07 01:56:01,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=835, Unknown=5, NotChecked=0, Total=992 [2021-12-07 01:56:01,841 INFO L87 Difference]: Start difference. First operand 458 states and 577 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 22 states have internal predecessors, (65), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-07 01:56:10,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:56:10,249 INFO L93 Difference]: Finished difference Result 475 states and 582 transitions. [2021-12-07 01:56:10,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-07 01:56:10,250 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 22 states have internal predecessors, (65), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 48 [2021-12-07 01:56:10,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:56:10,252 INFO L225 Difference]: With dead ends: 475 [2021-12-07 01:56:10,252 INFO L226 Difference]: Without dead ends: 475 [2021-12-07 01:56:10,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=246, Invalid=1307, Unknown=7, NotChecked=0, Total=1560 [2021-12-07 01:56:10,252 INFO L933 BasicCegarLoop]: 311 mSDtfsCounter, 343 mSDsluCounter, 2908 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 3219 SdHoareTripleChecker+Invalid, 1699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 529 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:56:10,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 3219 Invalid, 1699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1130 Invalid, 0 Unknown, 529 Unchecked, 3.5s Time] [2021-12-07 01:56:10,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-12-07 01:56:10,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 460. [2021-12-07 01:56:10,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 318 states have (on average 1.6477987421383649) internal successors, (524), 420 states have internal predecessors, (524), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (31), 26 states have call predecessors, (31), 24 states have call successors, (31) [2021-12-07 01:56:10,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 579 transitions. [2021-12-07 01:56:10,259 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 579 transitions. Word has length 48 [2021-12-07 01:56:10,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:56:10,259 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 579 transitions. [2021-12-07 01:56:10,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 22 states have internal predecessors, (65), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-07 01:56:10,260 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 579 transitions. [2021-12-07 01:56:10,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-07 01:56:10,260 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:56:10,260 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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 01:56:10,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2021-12-07 01:56:10,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (85)] Ended with exit code 0 [2021-12-07 01:56:10,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:56:10,662 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr85ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:56:10,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:56:10,663 INFO L85 PathProgramCache]: Analyzing trace with hash -85892980, now seen corresponding path program 1 times [2021-12-07 01:56:10,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:56:10,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175431735] [2021-12-07 01:56:10,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:56:10,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:56:10,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:56:10,665 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:56:10,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2021-12-07 01:56:10,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:56:10,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 01:56:10,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:56:10,940 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 01:56:11,084 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:56:11,085 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 01:56:11,297 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:56:11,298 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 24 treesize of output 31 [2021-12-07 01:56:11,555 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 01:56:11,629 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 17 treesize of output 19 [2021-12-07 01:56:11,659 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-07 01:56:11,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:56:11,891 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:56:11,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1175431735] [2021-12-07 01:56:11,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1175431735] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:56:11,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [201315006] [2021-12-07 01:56:11,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:56:11,891 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:56:11,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:56:11,892 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:56:11,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (87)] Waiting until timeout for monitored process [2021-12-07 01:56:12,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:56:12,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 01:56:12,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:56:12,113 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 01:56:12,199 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:56:12,199 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 01:56:12,444 INFO L354 Elim1Store]: treesize reduction 4, result has 85.7 percent of original size [2021-12-07 01:56:12,445 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 48 treesize of output 66 [2021-12-07 01:56:12,899 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:56:12,899 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 87 treesize of output 96 [2021-12-07 01:56:13,053 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:56:13,053 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 37 treesize of output 46 [2021-12-07 01:56:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 01:56:13,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:56:13,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [201315006] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:56:13,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:56:13,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2021-12-07 01:56:13,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154556848] [2021-12-07 01:56:13,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:56:13,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-07 01:56:13,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:56:13,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-07 01:56:13,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=215, Unknown=2, NotChecked=0, Total=272 [2021-12-07 01:56:13,310 INFO L87 Difference]: Start difference. First operand 460 states and 579 transitions. Second operand has 17 states, 16 states have (on average 3.3125) internal successors, (53), 13 states have internal predecessors, (53), 6 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-07 01:56:15,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:56:15,287 INFO L93 Difference]: Finished difference Result 464 states and 583 transitions. [2021-12-07 01:56:15,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 01:56:15,288 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 13 states have internal predecessors, (53), 6 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 49 [2021-12-07 01:56:15,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:56:15,289 INFO L225 Difference]: With dead ends: 464 [2021-12-07 01:56:15,289 INFO L226 Difference]: Without dead ends: 464 [2021-12-07 01:56:15,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 89 SyntacticMatches, 20 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=60, Invalid=244, Unknown=2, NotChecked=0, Total=306 [2021-12-07 01:56:15,290 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 46 mSDsluCounter, 1746 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 2046 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 401 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:56:15,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 2046 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 500 Invalid, 0 Unknown, 401 Unchecked, 1.8s Time] [2021-12-07 01:56:15,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-12-07 01:56:15,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 460. [2021-12-07 01:56:15,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 318 states have (on average 1.6446540880503144) internal successors, (523), 420 states have internal predecessors, (523), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (31), 26 states have call predecessors, (31), 24 states have call successors, (31) [2021-12-07 01:56:15,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 578 transitions. [2021-12-07 01:56:15,298 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 578 transitions. Word has length 49 [2021-12-07 01:56:15,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:56:15,298 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 578 transitions. [2021-12-07 01:56:15,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 13 states have internal predecessors, (53), 6 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-07 01:56:15,298 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 578 transitions. [2021-12-07 01:56:15,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-07 01:56:15,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:56:15,299 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:56:15,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (87)] Ended with exit code 0 [2021-12-07 01:56:15,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2021-12-07 01:56:15,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:56:15,700 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:56:15,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:56:15,700 INFO L85 PathProgramCache]: Analyzing trace with hash 291532103, now seen corresponding path program 1 times [2021-12-07 01:56:15,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:56:15,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701547321] [2021-12-07 01:56:15,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:56:15,701 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:56:15,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:56:15,701 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:56:15,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2021-12-07 01:56:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:56:15,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-07 01:56:15,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:56:25,933 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-07 01:56:25,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:56:26,674 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:56:26,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701547321] [2021-12-07 01:56:26,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701547321] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:56:26,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [166790554] [2021-12-07 01:56:26,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:56:26,675 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:56:26,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:56:26,676 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:56:26,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (89)] Waiting until timeout for monitored process [2021-12-07 01:56:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:56:26,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-07 01:56:26,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:57:00,459 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 01:57:00,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:57:06,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [166790554] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:57:06,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:57:06,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-12-07 01:57:06,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984226694] [2021-12-07 01:57:06,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:57:06,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-07 01:57:06,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:57:06,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-07 01:57:06,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1251, Unknown=12, NotChecked=0, Total=1406 [2021-12-07 01:57:06,840 INFO L87 Difference]: Start difference. First operand 460 states and 578 transitions. Second operand has 30 states, 26 states have (on average 2.576923076923077) internal successors, (67), 24 states have internal predecessors, (67), 8 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-07 01:57:33,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:57:33,928 INFO L93 Difference]: Finished difference Result 469 states and 587 transitions. [2021-12-07 01:57:33,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-07 01:57:33,929 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 2.576923076923077) internal successors, (67), 24 states have internal predecessors, (67), 8 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 50 [2021-12-07 01:57:33,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:57:33,930 INFO L225 Difference]: With dead ends: 469 [2021-12-07 01:57:33,930 INFO L226 Difference]: Without dead ends: 447 [2021-12-07 01:57:33,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 60.8s TimeCoverageRelationStatistics Valid=255, Invalid=2377, Unknown=20, NotChecked=0, Total=2652 [2021-12-07 01:57:33,931 INFO L933 BasicCegarLoop]: 286 mSDtfsCounter, 56 mSDsluCounter, 3282 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 3568 SdHoareTripleChecker+Invalid, 2269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2008 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:57:33,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 3568 Invalid, 2269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 248 Invalid, 0 Unknown, 2008 Unchecked, 0.7s Time] [2021-12-07 01:57:33,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-12-07 01:57:33,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 443. [2021-12-07 01:57:33,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 302 states have (on average 1.6754966887417218) internal successors, (506), 404 states have internal predecessors, (506), 24 states have call successors, (24), 17 states have call predecessors, (24), 20 states have return successors, (30), 25 states have call predecessors, (30), 24 states have call successors, (30) [2021-12-07 01:57:33,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 560 transitions. [2021-12-07 01:57:33,936 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 560 transitions. Word has length 50 [2021-12-07 01:57:33,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:57:33,936 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 560 transitions. [2021-12-07 01:57:33,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 2.576923076923077) internal successors, (67), 24 states have internal predecessors, (67), 8 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-07 01:57:33,936 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 560 transitions. [2021-12-07 01:57:33,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-07 01:57:33,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:57:33,937 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-12-07 01:57:33,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (89)] Ended with exit code 0 [2021-12-07 01:57:34,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (88)] Ended with exit code 0 [2021-12-07 01:57:34,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:57:34,339 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr88ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:57:34,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:57:34,340 INFO L85 PathProgramCache]: Analyzing trace with hash 963166306, now seen corresponding path program 1 times [2021-12-07 01:57:34,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:57:34,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [33610698] [2021-12-07 01:57:34,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:57:34,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:57:34,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:57:34,343 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:57:34,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2021-12-07 01:57:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:57:34,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-07 01:57:34,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:57:34,500 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 01:57:34,622 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:57:34,622 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 18 treesize of output 18 [2021-12-07 01:57:34,775 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:57:34,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-07 01:57:34,945 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 01:57:34,949 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 01:57:35,203 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:57:35,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 11 treesize of output 11 [2021-12-07 01:57:35,369 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 15 treesize of output 17 [2021-12-07 01:57:35,475 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 17 treesize of output 19 [2021-12-07 01:57:35,554 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 17 treesize of output 19 [2021-12-07 01:57:35,608 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-07 01:57:35,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:57:36,637 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 22 [2021-12-07 01:57:36,647 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 26 [2021-12-07 01:57:37,389 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:57:37,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [33610698] [2021-12-07 01:57:37,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [33610698] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:57:37,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2072909933] [2021-12-07 01:57:37,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:57:37,389 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:57:37,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:57:37,390 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:57:37,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (91)] Waiting until timeout for monitored process [2021-12-07 01:57:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:57:37,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-07 01:57:37,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:57:37,629 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 01:57:37,690 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:57:37,691 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 01:57:37,764 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:57:37,764 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 14 treesize of output 14 [2021-12-07 01:57:37,813 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 01:57:37,901 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:57:37,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 11 treesize of output 11 [2021-12-07 01:57:38,020 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 01:57:38,106 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 15 treesize of output 17 [2021-12-07 01:57:38,182 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 17 treesize of output 19 [2021-12-07 01:57:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-07 01:57:38,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:57:38,876 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 01:57:39,401 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 22 [2021-12-07 01:57:40,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2072909933] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:57:40,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:57:40,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-12-07 01:57:40,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998704330] [2021-12-07 01:57:40,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:57:40,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-07 01:57:40,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:57:40,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-07 01:57:40,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2021-12-07 01:57:40,341 INFO L87 Difference]: Start difference. First operand 443 states and 560 transitions. Second operand has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-07 01:57:47,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:57:47,122 INFO L93 Difference]: Finished difference Result 495 states and 572 transitions. [2021-12-07 01:57:47,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-07 01:57:47,123 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 52 [2021-12-07 01:57:47,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:57:47,124 INFO L225 Difference]: With dead ends: 495 [2021-12-07 01:57:47,124 INFO L226 Difference]: Without dead ends: 495 [2021-12-07 01:57:47,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 118 SyntacticMatches, 15 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=171, Invalid=1311, Unknown=0, NotChecked=0, Total=1482 [2021-12-07 01:57:47,124 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 577 mSDsluCounter, 2631 mSDsCounter, 0 mSdLazyCounter, 2331 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 2906 SdHoareTripleChecker+Invalid, 2416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:57:47,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [591 Valid, 2906 Invalid, 2416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2331 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2021-12-07 01:57:47,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-12-07 01:57:47,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 443. [2021-12-07 01:57:47,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 302 states have (on average 1.6721854304635762) internal successors, (505), 404 states have internal predecessors, (505), 24 states have call successors, (24), 17 states have call predecessors, (24), 20 states have return successors, (30), 25 states have call predecessors, (30), 24 states have call successors, (30) [2021-12-07 01:57:47,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 559 transitions. [2021-12-07 01:57:47,129 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 559 transitions. Word has length 52 [2021-12-07 01:57:47,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:57:47,129 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 559 transitions. [2021-12-07 01:57:47,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-07 01:57:47,129 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 559 transitions. [2021-12-07 01:57:47,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-07 01:57:47,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:57:47,130 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-12-07 01:57:47,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (91)] Ended with exit code 0 [2021-12-07 01:57:47,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (90)] Ended with exit code 0 [2021-12-07 01:57:47,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:57:47,532 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:57:47,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:57:47,533 INFO L85 PathProgramCache]: Analyzing trace with hash -2110101979, now seen corresponding path program 1 times [2021-12-07 01:57:47,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:57:47,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [950919556] [2021-12-07 01:57:47,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:57:47,535 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:57:47,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:57:47,535 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:57:47,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2021-12-07 01:57:47,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:57:47,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-07 01:57:47,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:57:47,952 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:57:47,952 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 24 treesize of output 31 [2021-12-07 01:57:48,111 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:57:48,111 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 24 treesize of output 31 [2021-12-07 01:57:48,351 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:57:48,352 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 01:57:48,649 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:57:48,649 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 26 treesize of output 33 [2021-12-07 01:57:49,126 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 17 treesize of output 19 [2021-12-07 01:57:49,249 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 22 treesize of output 24 [2021-12-07 01:57:49,347 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 17 treesize of output 19 [2021-12-07 01:57:49,401 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 01:57:49,416 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-07 01:57:49,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:57:49,778 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:57:49,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [950919556] [2021-12-07 01:57:49,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [950919556] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:57:49,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [891907137] [2021-12-07 01:57:49,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:57:49,779 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:57:49,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:57:49,780 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:57:49,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (93)] Waiting until timeout for monitored process [2021-12-07 01:57:50,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:57:50,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-07 01:57:50,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:57:50,069 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 9 treesize of output 3 [2021-12-07 01:57:50,204 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:57:50,204 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 26 treesize of output 33 [2021-12-07 01:57:50,533 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:57:50,533 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 26 treesize of output 33 [2021-12-07 01:57:51,131 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-07 01:57:51,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 63 [2021-12-07 01:57:52,251 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 01:57:52,540 INFO L354 Elim1Store]: treesize reduction 53, result has 41.1 percent of original size [2021-12-07 01:57:52,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 45 treesize of output 72 [2021-12-07 01:57:53,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:57:54,913 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-07 01:57:54,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 50 [2021-12-07 01:57:55,971 INFO L354 Elim1Store]: treesize reduction 46, result has 35.2 percent of original size [2021-12-07 01:57:55,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 83 [2021-12-07 01:57:58,089 INFO L354 Elim1Store]: treesize reduction 61, result has 37.8 percent of original size [2021-12-07 01:57:58,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 79 treesize of output 107 [2021-12-07 01:58:01,403 INFO L354 Elim1Store]: treesize reduction 45, result has 45.1 percent of original size [2021-12-07 01:58:01,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 99 [2021-12-07 01:58:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 01:58:02,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:58:30,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [891907137] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:58:30,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:58:30,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 27] total 35 [2021-12-07 01:58:30,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613624561] [2021-12-07 01:58:30,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:58:30,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-07 01:58:30,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:58:30,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-07 01:58:30,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1837, Unknown=0, NotChecked=0, Total=2352 [2021-12-07 01:58:30,672 INFO L87 Difference]: Start difference. First operand 443 states and 559 transitions. Second operand has 37 states, 33 states have (on average 2.0) internal successors, (66), 28 states have internal predecessors, (66), 9 states have call successors, (9), 1 states have call predecessors, (9), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-07 01:58:34,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:58:34,083 INFO L93 Difference]: Finished difference Result 443 states and 558 transitions. [2021-12-07 01:58:34,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-07 01:58:34,084 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 33 states have (on average 2.0) internal successors, (66), 28 states have internal predecessors, (66), 9 states have call successors, (9), 1 states have call predecessors, (9), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 54 [2021-12-07 01:58:34,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:58:34,085 INFO L225 Difference]: With dead ends: 443 [2021-12-07 01:58:34,085 INFO L226 Difference]: Without dead ends: 443 [2021-12-07 01:58:34,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 83 SyntacticMatches, 10 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=540, Invalid=2215, Unknown=1, NotChecked=0, Total=2756 [2021-12-07 01:58:34,086 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 11 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:58:34,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1005 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 348 Invalid, 0 Unknown, 191 Unchecked, 1.1s Time] [2021-12-07 01:58:34,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-12-07 01:58:34,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2021-12-07 01:58:34,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 302 states have (on average 1.6688741721854305) internal successors, (504), 404 states have internal predecessors, (504), 24 states have call successors, (24), 17 states have call predecessors, (24), 20 states have return successors, (30), 25 states have call predecessors, (30), 24 states have call successors, (30) [2021-12-07 01:58:34,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 558 transitions. [2021-12-07 01:58:34,091 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 558 transitions. Word has length 54 [2021-12-07 01:58:34,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:58:34,091 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 558 transitions. [2021-12-07 01:58:34,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 33 states have (on average 2.0) internal successors, (66), 28 states have internal predecessors, (66), 9 states have call successors, (9), 1 states have call predecessors, (9), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-07 01:58:34,091 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 558 transitions. [2021-12-07 01:58:34,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-07 01:58:34,092 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:58:34,092 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-12-07 01:58:34,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (92)] Ended with exit code 0 [2021-12-07 01:58:34,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (93)] Forceful destruction successful, exit code 0 [2021-12-07 01:58:34,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:58:34,494 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:58:34,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:58:34,495 INFO L85 PathProgramCache]: Analyzing trace with hash -2110101978, now seen corresponding path program 1 times [2021-12-07 01:58:34,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:58:34,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891885670] [2021-12-07 01:58:34,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:58:34,497 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:58:34,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:58:34,498 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:58:34,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2021-12-07 01:58:34,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:58:34,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-07 01:58:34,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:58:34,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:58:34,951 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 01:58:34,977 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:58:34,978 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 21 treesize of output 28 [2021-12-07 01:58:35,185 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:58:35,185 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 19 treesize of output 26 [2021-12-07 01:58:35,190 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 01:58:39,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:58:39,423 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 01:58:39,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:58:39,429 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 17 treesize of output 13 [2021-12-07 01:58:51,858 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-12-07 01:58:51,858 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 3 case distinctions, treesize of input 17 treesize of output 30 [2021-12-07 01:58:52,754 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 27 refuted. 4 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-07 01:58:52,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:58:53,508 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:58:53,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891885670] [2021-12-07 01:58:53,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891885670] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:58:53,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1978245235] [2021-12-07 01:58:53,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:58:53,508 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:58:53,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:58:53,509 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:58:53,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (95)] Waiting until timeout for monitored process [2021-12-07 01:58:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:58:53,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-07 01:58:53,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:58:53,803 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 9 treesize of output 3 [2021-12-07 01:58:54,027 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:58:54,027 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 18 [2021-12-07 01:58:54,070 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:58:54,070 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 29 treesize of output 36 [2021-12-07 01:58:54,542 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:58:54,542 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 33 treesize of output 40 [2021-12-07 01:58:54,591 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 01:58:55,472 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:58:55,472 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 18 [2021-12-07 01:58:55,528 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-07 01:58:55,528 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 25 treesize of output 27 [2021-12-07 01:58:56,131 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:58:56,131 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 18 [2021-12-07 01:58:57,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-07 01:58:57,868 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:58:57,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-12-07 01:58:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 29 refuted. 2 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-07 01:58:58,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:58:59,679 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:58:59,680 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 165 treesize of output 167 [2021-12-07 01:59:01,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1978245235] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:59:01,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:59:01,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 22] total 27 [2021-12-07 01:59:01,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287706295] [2021-12-07 01:59:01,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:59:01,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-07 01:59:01,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:59:01,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-07 01:59:01,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1101, Unknown=8, NotChecked=0, Total=1406 [2021-12-07 01:59:01,356 INFO L87 Difference]: Start difference. First operand 443 states and 558 transitions. Second operand has 29 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 7 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-07 01:59:03,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:59:03,796 INFO L93 Difference]: Finished difference Result 443 states and 557 transitions. [2021-12-07 01:59:03,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-07 01:59:03,797 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 7 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 54 [2021-12-07 01:59:03,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:59:03,798 INFO L225 Difference]: With dead ends: 443 [2021-12-07 01:59:03,798 INFO L226 Difference]: Without dead ends: 443 [2021-12-07 01:59:03,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 118 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=410, Invalid=1652, Unknown=8, NotChecked=0, Total=2070 [2021-12-07 01:59:03,801 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 10 mSDsluCounter, 1808 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2105 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1072 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:59:03,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 2105 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 328 Invalid, 0 Unknown, 1072 Unchecked, 1.2s Time] [2021-12-07 01:59:03,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-12-07 01:59:03,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2021-12-07 01:59:03,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 302 states have (on average 1.6655629139072847) internal successors, (503), 404 states have internal predecessors, (503), 24 states have call successors, (24), 17 states have call predecessors, (24), 20 states have return successors, (30), 25 states have call predecessors, (30), 24 states have call successors, (30) [2021-12-07 01:59:03,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 557 transitions. [2021-12-07 01:59:03,806 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 557 transitions. Word has length 54 [2021-12-07 01:59:03,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:59:03,806 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 557 transitions. [2021-12-07 01:59:03,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 7 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-07 01:59:03,806 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 557 transitions. [2021-12-07 01:59:03,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-07 01:59:03,807 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:59:03,807 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 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 01:59:03,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (94)] Ended with exit code 0 [2021-12-07 01:59:04,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (95)] Ended with exit code 0 [2021-12-07 01:59:04,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:59:04,208 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:59:04,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:59:04,209 INFO L85 PathProgramCache]: Analyzing trace with hash -894879203, now seen corresponding path program 1 times [2021-12-07 01:59:04,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:59:04,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954457221] [2021-12-07 01:59:04,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:59:04,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:59:04,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:59:04,212 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:59:04,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2021-12-07 01:59:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:59:04,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:59:04,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:59:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-07 01:59:04,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:59:04,418 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:59:04,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954457221] [2021-12-07 01:59:04,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1954457221] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:59:04,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:59:04,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:59:04,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193373021] [2021-12-07 01:59:04,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:59:04,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:59:04,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:59:04,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:59:04,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:59:04,419 INFO L87 Difference]: Start difference. First operand 443 states and 557 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:59:04,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:59:04,486 INFO L93 Difference]: Finished difference Result 447 states and 559 transitions. [2021-12-07 01:59:04,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:59:04,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2021-12-07 01:59:04,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:59:04,487 INFO L225 Difference]: With dead ends: 447 [2021-12-07 01:59:04,487 INFO L226 Difference]: Without dead ends: 447 [2021-12-07 01:59:04,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 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 01:59:04,488 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 213 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 1108 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:59:04,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 1108 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:59:04,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-12-07 01:59:04,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 442. [2021-12-07 01:59:04,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 302 states have (on average 1.6622516556291391) internal successors, (502), 403 states have internal predecessors, (502), 24 states have call successors, (24), 17 states have call predecessors, (24), 20 states have return successors, (30), 25 states have call predecessors, (30), 24 states have call successors, (30) [2021-12-07 01:59:04,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 556 transitions. [2021-12-07 01:59:04,493 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 556 transitions. Word has length 55 [2021-12-07 01:59:04,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:59:04,493 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 556 transitions. [2021-12-07 01:59:04,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:59:04,493 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 556 transitions. [2021-12-07 01:59:04,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-07 01:59:04,494 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:59:04,494 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 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 01:59:04,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (96)] Ended with exit code 0 [2021-12-07 01:59:04,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:59:04,695 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:59:04,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:59:04,696 INFO L85 PathProgramCache]: Analyzing trace with hash -894879327, now seen corresponding path program 1 times [2021-12-07 01:59:04,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:59:04,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1173070113] [2021-12-07 01:59:04,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:59:04,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:59:04,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:59:04,699 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:59:04,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2021-12-07 01:59:04,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:59:04,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:59:04,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:59:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-07 01:59:04,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:59:04,964 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:59:04,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1173070113] [2021-12-07 01:59:04,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1173070113] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:59:04,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:59:04,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:59:04,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766740340] [2021-12-07 01:59:04,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:59:04,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:59:04,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:59:04,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:59:04,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:59:04,965 INFO L87 Difference]: Start difference. First operand 442 states and 556 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:59:05,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:59:05,052 INFO L93 Difference]: Finished difference Result 462 states and 511 transitions. [2021-12-07 01:59:05,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:59:05,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2021-12-07 01:59:05,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:59:05,053 INFO L225 Difference]: With dead ends: 462 [2021-12-07 01:59:05,053 INFO L226 Difference]: Without dead ends: 462 [2021-12-07 01:59:05,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 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 01:59:05,054 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 93 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:59:05,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 1314 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:59:05,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-12-07 01:59:05,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 370. [2021-12-07 01:59:05,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 239 states have (on average 1.5857740585774058) internal successors, (379), 340 states have internal predecessors, (379), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-07 01:59:05,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 414 transitions. [2021-12-07 01:59:05,058 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 414 transitions. Word has length 55 [2021-12-07 01:59:05,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:59:05,058 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 414 transitions. [2021-12-07 01:59:05,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:59:05,058 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 414 transitions. [2021-12-07 01:59:05,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-07 01:59:05,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:59:05,059 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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 01:59:05,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (97)] Ended with exit code 0 [2021-12-07 01:59:05,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:59:05,260 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:59:05,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:59:05,261 INFO L85 PathProgramCache]: Analyzing trace with hash -923508478, now seen corresponding path program 1 times [2021-12-07 01:59:05,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:59:05,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1751844308] [2021-12-07 01:59:05,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:59:05,263 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:59:05,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:59:05,265 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:59:05,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2021-12-07 01:59:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:59:05,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 01:59:05,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:59:05,768 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 01:59:05,802 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-07 01:59:05,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:59:05,802 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:59:05,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1751844308] [2021-12-07 01:59:05,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1751844308] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:59:05,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:59:05,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:59:05,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341835833] [2021-12-07 01:59:05,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:59:05,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:59:05,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:59:05,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:59:05,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:59:05,804 INFO L87 Difference]: Start difference. First operand 370 states and 414 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:59:06,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:59:06,636 INFO L93 Difference]: Finished difference Result 388 states and 438 transitions. [2021-12-07 01:59:06,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:59:06,637 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2021-12-07 01:59:06,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:59:06,638 INFO L225 Difference]: With dead ends: 388 [2021-12-07 01:59:06,638 INFO L226 Difference]: Without dead ends: 388 [2021-12-07 01:59:06,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 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 01:59:06,638 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 51 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:59:06,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 883 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-07 01:59:06,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-12-07 01:59:06,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 368. [2021-12-07 01:59:06,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 239 states have (on average 1.5774058577405858) internal successors, (377), 338 states have internal predecessors, (377), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-07 01:59:06,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 412 transitions. [2021-12-07 01:59:06,642 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 412 transitions. Word has length 55 [2021-12-07 01:59:06,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:59:06,643 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 412 transitions. [2021-12-07 01:59:06,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:59:06,643 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 412 transitions. [2021-12-07 01:59:06,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-07 01:59:06,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:59:06,643 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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 01:59:06,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (98)] Ended with exit code 0 [2021-12-07 01:59:06,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:59:06,844 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:59:06,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:59:06,845 INFO L85 PathProgramCache]: Analyzing trace with hash -923508477, now seen corresponding path program 1 times [2021-12-07 01:59:06,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:59:06,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [328614066] [2021-12-07 01:59:06,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:59:06,847 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:59:06,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:59:06,849 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:59:06,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2021-12-07 01:59:07,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:59:07,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:59:07,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:59:07,093 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 01:59:07,196 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-07 01:59:07,196 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 15 treesize of output 20 [2021-12-07 01:59:07,218 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-07 01:59:07,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:59:07,218 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:59:07,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [328614066] [2021-12-07 01:59:07,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [328614066] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:59:07,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:59:07,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:59:07,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18379349] [2021-12-07 01:59:07,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:59:07,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:59:07,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:59:07,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:59:07,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:59:07,220 INFO L87 Difference]: Start difference. First operand 368 states and 412 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:59:08,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:59:08,112 INFO L93 Difference]: Finished difference Result 428 states and 490 transitions. [2021-12-07 01:59:08,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:59:08,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2021-12-07 01:59:08,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:59:08,114 INFO L225 Difference]: With dead ends: 428 [2021-12-07 01:59:08,114 INFO L226 Difference]: Without dead ends: 428 [2021-12-07 01:59:08,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 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 01:59:08,115 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 136 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:59:08,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 748 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 298 Invalid, 0 Unknown, 203 Unchecked, 0.9s Time] [2021-12-07 01:59:08,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-12-07 01:59:08,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 367. [2021-12-07 01:59:08,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 239 states have (on average 1.5732217573221758) internal successors, (376), 337 states have internal predecessors, (376), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-07 01:59:08,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 411 transitions. [2021-12-07 01:59:08,119 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 411 transitions. Word has length 55 [2021-12-07 01:59:08,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:59:08,119 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 411 transitions. [2021-12-07 01:59:08,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:59:08,119 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 411 transitions. [2021-12-07 01:59:08,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-07 01:59:08,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:59:08,120 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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 01:59:08,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (99)] Ended with exit code 0 [2021-12-07 01:59:08,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:59:08,321 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:59:08,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:59:08,322 INFO L85 PathProgramCache]: Analyzing trace with hash -923508476, now seen corresponding path program 1 times [2021-12-07 01:59:08,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:59:08,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [327937752] [2021-12-07 01:59:08,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:59:08,324 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:59:08,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:59:08,325 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:59:08,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2021-12-07 01:59:08,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:59:08,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 01:59:08,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:59:08,667 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 01:59:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-07 01:59:08,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:59:08,748 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:59:08,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [327937752] [2021-12-07 01:59:08,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [327937752] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:59:08,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:59:08,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:59:08,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015721978] [2021-12-07 01:59:08,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:59:08,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:59:08,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:59:08,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:59:08,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:59:08,750 INFO L87 Difference]: Start difference. First operand 367 states and 411 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:59:10,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:59:10,056 INFO L93 Difference]: Finished difference Result 460 states and 510 transitions. [2021-12-07 01:59:10,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:59:10,058 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2021-12-07 01:59:10,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:59:10,058 INFO L225 Difference]: With dead ends: 460 [2021-12-07 01:59:10,058 INFO L226 Difference]: Without dead ends: 460 [2021-12-07 01:59:10,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:59:10,059 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 100 mSDsluCounter, 1108 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:59:10,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 1472 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-07 01:59:10,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-12-07 01:59:10,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 365. [2021-12-07 01:59:10,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 239 states have (on average 1.5648535564853556) internal successors, (374), 335 states have internal predecessors, (374), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-07 01:59:10,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 409 transitions. [2021-12-07 01:59:10,063 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 409 transitions. Word has length 55 [2021-12-07 01:59:10,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:59:10,063 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 409 transitions. [2021-12-07 01:59:10,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:59:10,063 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 409 transitions. [2021-12-07 01:59:10,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-07 01:59:10,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:59:10,063 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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 01:59:10,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (100)] Ended with exit code 0 [2021-12-07 01:59:10,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:59:10,264 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:59:10,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:59:10,265 INFO L85 PathProgramCache]: Analyzing trace with hash -923508475, now seen corresponding path program 1 times [2021-12-07 01:59:10,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:59:10,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507124337] [2021-12-07 01:59:10,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:59:10,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:59:10,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:59:10,269 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:59:10,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2021-12-07 01:59:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:59:10,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 01:59:10,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:59:12,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:59:12,664 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 01:59:12,683 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:59:12,683 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 14 treesize of output 14 [2021-12-07 01:59:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-07 01:59:12,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:59:12,766 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:59:12,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507124337] [2021-12-07 01:59:12,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507124337] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:59:12,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:59:12,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:59:12,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261258608] [2021-12-07 01:59:12,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:59:12,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:59:12,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:59:12,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:59:12,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=19, Unknown=1, NotChecked=0, Total=30 [2021-12-07 01:59:12,767 INFO L87 Difference]: Start difference. First operand 365 states and 409 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:59:14,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:59:14,263 INFO L93 Difference]: Finished difference Result 462 states and 512 transitions. [2021-12-07 01:59:14,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:59:14,264 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2021-12-07 01:59:14,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:59:14,265 INFO L225 Difference]: With dead ends: 462 [2021-12-07 01:59:14,265 INFO L226 Difference]: Without dead ends: 462 [2021-12-07 01:59:14,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=10, Invalid=19, Unknown=1, NotChecked=0, Total=30 [2021-12-07 01:59:14,266 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 148 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:59:14,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 825 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 373 Invalid, 0 Unknown, 174 Unchecked, 1.5s Time] [2021-12-07 01:59:14,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-12-07 01:59:14,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 364. [2021-12-07 01:59:14,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 238 states have (on average 1.5672268907563025) internal successors, (373), 334 states have internal predecessors, (373), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-07 01:59:14,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 408 transitions. [2021-12-07 01:59:14,269 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 408 transitions. Word has length 55 [2021-12-07 01:59:14,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:59:14,269 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 408 transitions. [2021-12-07 01:59:14,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:59:14,270 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 408 transitions. [2021-12-07 01:59:14,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-07 01:59:14,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:59:14,270 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 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 01:59:14,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (101)] Ended with exit code 0 [2021-12-07 01:59:14,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:59:14,471 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:59:14,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:59:14,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1971451162, now seen corresponding path program 1 times [2021-12-07 01:59:14,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:59:14,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555448005] [2021-12-07 01:59:14,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:59:14,480 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:59:14,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:59:14,481 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:59:14,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2021-12-07 01:59:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:59:14,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 01:59:14,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:59:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-07 01:59:14,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:59:14,905 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:59:14,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555448005] [2021-12-07 01:59:14,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555448005] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:59:14,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:59:14,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:59:14,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015536415] [2021-12-07 01:59:14,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:59:14,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:59:14,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:59:14,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:59:14,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:59:14,907 INFO L87 Difference]: Start difference. First operand 364 states and 408 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:59:15,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:59:15,304 INFO L93 Difference]: Finished difference Result 455 states and 504 transitions. [2021-12-07 01:59:15,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:59:15,304 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 56 [2021-12-07 01:59:15,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:59:15,305 INFO L225 Difference]: With dead ends: 455 [2021-12-07 01:59:15,305 INFO L226 Difference]: Without dead ends: 455 [2021-12-07 01:59:15,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:59:15,306 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 369 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:59:15,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 1118 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 01:59:15,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-12-07 01:59:15,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 364. [2021-12-07 01:59:15,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 238 states have (on average 1.5630252100840336) internal successors, (372), 334 states have internal predecessors, (372), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-07 01:59:15,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 407 transitions. [2021-12-07 01:59:15,310 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 407 transitions. Word has length 56 [2021-12-07 01:59:15,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:59:15,310 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 407 transitions. [2021-12-07 01:59:15,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:59:15,310 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 407 transitions. [2021-12-07 01:59:15,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-07 01:59:15,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:59:15,311 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 1] [2021-12-07 01:59:15,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (102)] Ended with exit code 0 [2021-12-07 01:59:15,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:59:15,512 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:59:15,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:59:15,512 INFO L85 PathProgramCache]: Analyzing trace with hash -583426009, now seen corresponding path program 1 times [2021-12-07 01:59:15,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:59:15,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363331538] [2021-12-07 01:59:15,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:59:15,513 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:59:15,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:59:15,515 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:59:15,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2021-12-07 01:59:15,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:59:15,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-07 01:59:15,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:59:16,187 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:59:16,187 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 1 case distinctions, treesize of input 14 treesize of output 23 [2021-12-07 01:59:16,493 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:59:16,493 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 27 [2021-12-07 01:59:16,734 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:59:16,734 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 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-07 01:59:16,739 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 5 treesize of output 3 [2021-12-07 01:59:16,805 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:59:16,805 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 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-07 01:59:16,817 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 5 treesize of output 3 [2021-12-07 01:59:17,199 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:59:17,199 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2021-12-07 01:59:17,212 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 5 treesize of output 3 [2021-12-07 01:59:17,267 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:59:17,267 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2021-12-07 01:59:17,282 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-07 01:59:17,507 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:59:17,508 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 1 case distinctions, treesize of input 18 treesize of output 24 [2021-12-07 01:59:17,555 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:59:17,555 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 1 case distinctions, treesize of input 18 treesize of output 24 [2021-12-07 01:59:18,104 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 01:59:18,391 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:59:18,391 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 21 treesize of output 28 [2021-12-07 01:59:21,423 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:59:21,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2021-12-07 01:59:21,433 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 01:59:21,437 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 01:59:21,555 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-07 01:59:21,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:59:21,772 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:59:21,772 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 38 treesize of output 42 [2021-12-07 01:59:22,399 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-07 01:59:22,399 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 99 treesize of output 95 [2021-12-07 01:59:23,493 WARN L838 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_entry_point_~cfg~2#1.base| |c_~#ldv_global_msg_list~0.base|) (and (= |c_ULTIMATE.start_entry_point_~client~0#1.base| |c_ULTIMATE.start_entry_point_~cfg~2#1.base|) (not (= |c_ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 32)))) (and (forall ((v_ArrVal_2398 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base| v_ArrVal_2398) |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_2397 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| v_ArrVal_2397) |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|) |c_~#ldv_global_msg_list~0.base|)) (forall ((v_ArrVal_2398 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base| v_ArrVal_2398) |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|)) (bvadd (_ bv4 32) |c_~#ldv_global_msg_list~0.offset|)))) (= |c_ULTIMATE.start_entry_point_~client~0#1.base| |c_~#ldv_global_msg_list~0.base|)) is different from false [2021-12-07 01:59:23,620 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:59:23,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363331538] [2021-12-07 01:59:23,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363331538] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:59:23,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [663236138] [2021-12-07 01:59:23,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:59:23,621 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:59:23,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:59:23,622 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:59:23,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (104)] Waiting until timeout for monitored process [2021-12-07 01:59:23,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:59:23,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-07 01:59:23,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:59:28,341 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:59:28,341 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 15 treesize of output 24 [2021-12-07 01:59:28,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:59:28,916 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 24 [2021-12-07 01:59:29,402 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:59:29,403 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-07 01:59:29,410 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 5 treesize of output 3 [2021-12-07 01:59:29,448 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:59:29,448 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-12-07 01:59:29,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:59:29,454 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 13 treesize of output 7 [2021-12-07 01:59:29,809 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:59:29,810 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2021-12-07 01:59:29,840 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:59:29,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2021-12-07 01:59:29,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:59:29,908 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 13 treesize of output 7 [2021-12-07 01:59:29,956 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-07 01:59:30,267 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:59:30,268 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 41 [2021-12-07 01:59:30,301 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:59:30,301 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 37 [2021-12-07 01:59:30,316 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-07 01:59:30,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:59:30,371 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 13 treesize of output 7 [2021-12-07 01:59:30,875 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 01:59:31,136 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-12-07 01:59:31,143 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 26 treesize of output 18 [2021-12-07 01:59:31,162 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:59:31,163 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 17 treesize of output 17 [2021-12-07 01:59:31,189 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-07 01:59:31,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:59:31,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:59:31,242 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 38 treesize of output 42 [2021-12-07 01:59:31,410 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 26 [2021-12-07 01:59:32,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [663236138] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:59:32,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:59:32,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-12-07 01:59:32,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839826236] [2021-12-07 01:59:32,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:59:32,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-07 01:59:32,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:59:32,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-07 01:59:32,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=924, Unknown=6, NotChecked=64, Total=1190 [2021-12-07 01:59:32,766 INFO L87 Difference]: Start difference. First operand 364 states and 407 transitions. Second operand has 27 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 22 states have internal predecessors, (74), 7 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-07 01:59:49,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:59:49,035 INFO L93 Difference]: Finished difference Result 368 states and 409 transitions. [2021-12-07 01:59:49,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-07 01:59:49,037 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 22 states have internal predecessors, (74), 7 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 56 [2021-12-07 01:59:49,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:59:49,037 INFO L225 Difference]: With dead ends: 368 [2021-12-07 01:59:49,037 INFO L226 Difference]: Without dead ends: 368 [2021-12-07 01:59:49,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 140 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=322, Invalid=1650, Unknown=12, NotChecked=86, Total=2070 [2021-12-07 01:59:49,038 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 48 mSDsluCounter, 2702 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 2992 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 570 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:59:49,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 2992 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 846 Invalid, 0 Unknown, 570 Unchecked, 2.8s Time] [2021-12-07 01:59:49,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-12-07 01:59:49,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 364. [2021-12-07 01:59:49,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 238 states have (on average 1.5588235294117647) internal successors, (371), 334 states have internal predecessors, (371), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-07 01:59:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 406 transitions. [2021-12-07 01:59:49,041 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 406 transitions. Word has length 56 [2021-12-07 01:59:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:59:49,041 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 406 transitions. [2021-12-07 01:59:49,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 22 states have internal predecessors, (74), 7 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-07 01:59:49,042 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 406 transitions. [2021-12-07 01:59:49,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-07 01:59:49,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:59:49,042 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 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 01:59:49,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (103)] Ended with exit code 0 [2021-12-07 01:59:49,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (104)] Ended with exit code 0 [2021-12-07 01:59:49,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:59:49,444 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr63REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:59:49,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:59:49,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1246109365, now seen corresponding path program 1 times [2021-12-07 01:59:49,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:59:49,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416239150] [2021-12-07 01:59:49,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:59:49,446 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:59:49,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:59:49,447 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:59:49,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2021-12-07 01:59:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:59:49,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:59:49,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:59:49,753 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-07 01:59:49,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:59:49,753 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:59:49,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416239150] [2021-12-07 01:59:49,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416239150] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:59:49,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:59:49,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:59:49,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688887878] [2021-12-07 01:59:49,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:59:49,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:59:49,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:59:49,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:59:49,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:59:49,754 INFO L87 Difference]: Start difference. First operand 364 states and 406 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:59:49,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:59:49,813 INFO L93 Difference]: Finished difference Result 427 states and 472 transitions. [2021-12-07 01:59:49,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:59:49,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 60 [2021-12-07 01:59:49,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:59:49,815 INFO L225 Difference]: With dead ends: 427 [2021-12-07 01:59:49,815 INFO L226 Difference]: Without dead ends: 427 [2021-12-07 01:59:49,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:59:49,815 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 119 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:59:49,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 1282 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:59:49,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-12-07 01:59:49,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 366. [2021-12-07 01:59:49,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 240 states have (on average 1.5541666666666667) internal successors, (373), 336 states have internal predecessors, (373), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-07 01:59:49,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 408 transitions. [2021-12-07 01:59:49,819 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 408 transitions. Word has length 60 [2021-12-07 01:59:49,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:59:49,819 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 408 transitions. [2021-12-07 01:59:49,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:59:49,819 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 408 transitions. [2021-12-07 01:59:49,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-07 01:59:49,820 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:59:49,820 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 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 01:59:49,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (105)] Ended with exit code 0 [2021-12-07 01:59:50,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:59:50,021 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr74ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:59:50,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:59:50,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1246108245, now seen corresponding path program 1 times [2021-12-07 01:59:50,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:59:50,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585316838] [2021-12-07 01:59:50,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:59:50,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:59:50,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:59:50,026 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:59:50,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2021-12-07 01:59:50,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:59:50,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:59:50,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:59:50,528 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-07 01:59:50,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:59:50,626 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-07 01:59:50,626 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:59:50,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585316838] [2021-12-07 01:59:50,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585316838] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:59:50,626 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:59:50,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-12-07 01:59:50,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138651721] [2021-12-07 01:59:50,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:59:50,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:59:50,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:59:50,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:59:50,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:59:50,628 INFO L87 Difference]: Start difference. First operand 366 states and 408 transitions. Second operand has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:59:50,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:59:50,667 INFO L93 Difference]: Finished difference Result 365 states and 407 transitions. [2021-12-07 01:59:50,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:59:50,667 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 60 [2021-12-07 01:59:50,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:59:50,668 INFO L225 Difference]: With dead ends: 365 [2021-12-07 01:59:50,668 INFO L226 Difference]: Without dead ends: 365 [2021-12-07 01:59:50,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 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 01:59:50,668 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 202 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:59:50,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 1000 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:59:50,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-12-07 01:59:50,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2021-12-07 01:59:50,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 240 states have (on average 1.55) internal successors, (372), 335 states have internal predecessors, (372), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-07 01:59:50,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 407 transitions. [2021-12-07 01:59:50,672 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 407 transitions. Word has length 60 [2021-12-07 01:59:50,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:59:50,672 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 407 transitions. [2021-12-07 01:59:50,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:59:50,672 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 407 transitions. [2021-12-07 01:59:50,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-07 01:59:50,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:59:50,672 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 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, 1] [2021-12-07 01:59:50,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (106)] Ended with exit code 0 [2021-12-07 01:59:50,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:59:50,874 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr75ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:59:50,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:59:50,875 INFO L85 PathProgramCache]: Analyzing trace with hash 25350471, now seen corresponding path program 1 times [2021-12-07 01:59:50,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:59:50,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1833936562] [2021-12-07 01:59:50,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:59:50,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:59:50,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:59:50,879 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:59:50,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2021-12-07 01:59:51,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:59:51,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:59:51,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:59:51,750 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-07 01:59:51,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:59:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-07 01:59:51,997 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:59:51,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1833936562] [2021-12-07 01:59:51,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1833936562] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:59:51,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:59:51,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-07 01:59:51,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648132479] [2021-12-07 01:59:51,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:59:51,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 01:59:51,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:59:51,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 01:59:51,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:59:51,998 INFO L87 Difference]: Start difference. First operand 365 states and 407 transitions. Second operand has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-07 01:59:52,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:59:52,262 INFO L93 Difference]: Finished difference Result 522 states and 588 transitions. [2021-12-07 01:59:52,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:59:52,263 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 61 [2021-12-07 01:59:52,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:59:52,264 INFO L225 Difference]: With dead ends: 522 [2021-12-07 01:59:52,264 INFO L226 Difference]: Without dead ends: 522 [2021-12-07 01:59:52,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:59:52,264 INFO L933 BasicCegarLoop]: 408 mSDtfsCounter, 254 mSDsluCounter, 1550 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 1958 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:59:52,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 1958 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 118 Invalid, 0 Unknown, 151 Unchecked, 0.3s Time] [2021-12-07 01:59:52,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-12-07 01:59:52,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 431. [2021-12-07 01:59:52,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 295 states have (on average 1.583050847457627) internal successors, (467), 392 states have internal predecessors, (467), 23 states have call successors, (23), 18 states have call predecessors, (23), 22 states have return successors, (31), 24 states have call predecessors, (31), 23 states have call successors, (31) [2021-12-07 01:59:52,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 521 transitions. [2021-12-07 01:59:52,272 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 521 transitions. Word has length 61 [2021-12-07 01:59:52,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:59:52,272 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 521 transitions. [2021-12-07 01:59:52,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-07 01:59:52,272 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 521 transitions. [2021-12-07 01:59:52,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-07 01:59:52,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:59:52,273 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1] [2021-12-07 01:59:52,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (107)] Ended with exit code 0 [2021-12-07 01:59:52,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:59:52,474 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 01:59:52,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:59:52,475 INFO L85 PathProgramCache]: Analyzing trace with hash -597667913, now seen corresponding path program 1 times [2021-12-07 01:59:52,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:59:52,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137678497] [2021-12-07 01:59:52,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:59:52,477 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:59:52,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:59:52,479 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:59:52,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2021-12-07 01:59:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:59:52,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-07 01:59:52,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 02:00:37,514 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-07 02:00:37,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 02:00:40,321 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 02:00:40,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137678497] [2021-12-07 02:00:40,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137678497] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 02:00:40,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1468742489] [2021-12-07 02:00:40,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 02:00:40,322 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 02:00:40,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 02:00:40,323 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 02:00:40,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (109)] Waiting until timeout for monitored process [2021-12-07 02:00:40,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 02:00:40,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-07 02:00:40,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 02:01:49,392 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-07 02:01:49,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 02:02:14,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1468742489] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 02:02:14,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 02:02:14,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 38 [2021-12-07 02:02:14,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796843145] [2021-12-07 02:02:14,472 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 02:02:14,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-07 02:02:14,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 02:02:14,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-07 02:02:14,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2226, Unknown=17, NotChecked=0, Total=2450 [2021-12-07 02:02:14,473 INFO L87 Difference]: Start difference. First operand 431 states and 521 transitions. Second operand has 39 states, 34 states have (on average 2.323529411764706) internal successors, (79), 31 states have internal predecessors, (79), 10 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-07 02:03:00,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 02:03:00,665 INFO L93 Difference]: Finished difference Result 438 states and 526 transitions. [2021-12-07 02:03:00,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-07 02:03:00,666 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 34 states have (on average 2.323529411764706) internal successors, (79), 31 states have internal predecessors, (79), 10 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 61 [2021-12-07 02:03:00,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 02:03:00,667 INFO L225 Difference]: With dead ends: 438 [2021-12-07 02:03:00,667 INFO L226 Difference]: Without dead ends: 413 [2021-12-07 02:03:00,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 116 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 117.6s TimeCoverageRelationStatistics Valid=332, Invalid=3798, Unknown=30, NotChecked=0, Total=4160 [2021-12-07 02:03:00,668 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 67 mSDsluCounter, 4032 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 4302 SdHoareTripleChecker+Invalid, 2835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2469 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-07 02:03:00,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 4302 Invalid, 2835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 354 Invalid, 0 Unknown, 2469 Unchecked, 1.2s Time] [2021-12-07 02:03:00,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-12-07 02:03:00,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 409. [2021-12-07 02:03:00,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 274 states have (on average 1.6240875912408759) internal successors, (445), 371 states have internal predecessors, (445), 23 states have call successors, (23), 18 states have call predecessors, (23), 21 states have return successors, (28), 23 states have call predecessors, (28), 23 states have call successors, (28) [2021-12-07 02:03:00,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 496 transitions. [2021-12-07 02:03:00,672 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 496 transitions. Word has length 61 [2021-12-07 02:03:00,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 02:03:00,672 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 496 transitions. [2021-12-07 02:03:00,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 34 states have (on average 2.323529411764706) internal successors, (79), 31 states have internal predecessors, (79), 10 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-07 02:03:00,672 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 496 transitions. [2021-12-07 02:03:00,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-07 02:03:00,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 02:03:00,673 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 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, 1, 1] [2021-12-07 02:03:00,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (108)] Ended with exit code 0 [2021-12-07 02:03:00,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (109)] Ended with exit code 0 [2021-12-07 02:03:01,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 02:03:01,074 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr76ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 02:03:01,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 02:03:01,076 INFO L85 PathProgramCache]: Analyzing trace with hash 785865005, now seen corresponding path program 1 times [2021-12-07 02:03:01,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 02:03:01,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [64748469] [2021-12-07 02:03:01,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 02:03:01,077 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 02:03:01,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 02:03:01,078 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 02:03:01,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2021-12-07 02:03:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 02:03:01,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-07 02:03:01,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 02:03:01,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-07 02:03:01,413 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 02:03:01,413 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 29 treesize of output 36 [2021-12-07 02:03:01,712 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 02:03:01,712 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 1 case distinctions, treesize of input 29 treesize of output 40 [2021-12-07 02:03:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-07 02:03:01,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 02:03:04,840 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-07 02:03:04,840 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 02:03:04,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [64748469] [2021-12-07 02:03:04,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [64748469] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 02:03:04,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 02:03:04,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-12-07 02:03:04,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856805816] [2021-12-07 02:03:04,841 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 02:03:04,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 02:03:04,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 02:03:04,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 02:03:04,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=247, Unknown=1, NotChecked=0, Total=306 [2021-12-07 02:03:04,841 INFO L87 Difference]: Start difference. First operand 409 states and 496 transitions. Second operand has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-07 02:03:05,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 02:03:05,259 INFO L93 Difference]: Finished difference Result 419 states and 507 transitions. [2021-12-07 02:03:05,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 02:03:05,260 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2021-12-07 02:03:05,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 02:03:05,261 INFO L225 Difference]: With dead ends: 419 [2021-12-07 02:03:05,261 INFO L226 Difference]: Without dead ends: 419 [2021-12-07 02:03:05,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=58, Invalid=247, Unknown=1, NotChecked=0, Total=306 [2021-12-07 02:03:05,261 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 28 mSDsluCounter, 1533 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1836 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 552 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 02:03:05,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 1836 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 163 Invalid, 0 Unknown, 552 Unchecked, 0.4s Time] [2021-12-07 02:03:05,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-12-07 02:03:05,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 417. [2021-12-07 02:03:05,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 282 states have (on average 1.6063829787234043) internal successors, (453), 379 states have internal predecessors, (453), 23 states have call successors, (23), 18 states have call predecessors, (23), 21 states have return successors, (28), 23 states have call predecessors, (28), 23 states have call successors, (28) [2021-12-07 02:03:05,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 504 transitions. [2021-12-07 02:03:05,266 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 504 transitions. Word has length 62 [2021-12-07 02:03:05,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 02:03:05,266 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 504 transitions. [2021-12-07 02:03:05,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-07 02:03:05,266 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 504 transitions. [2021-12-07 02:03:05,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-07 02:03:05,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 02:03:05,267 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1] [2021-12-07 02:03:05,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (110)] Ended with exit code 0 [2021-12-07 02:03:05,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 02:03:05,468 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr76ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 02:03:05,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 02:03:05,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1079268012, now seen corresponding path program 1 times [2021-12-07 02:03:05,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 02:03:05,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [253043541] [2021-12-07 02:03:05,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 02:03:05,471 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 02:03:05,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 02:03:05,473 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 02:03:05,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (111)] Waiting until timeout for monitored process [2021-12-07 02:03:05,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 02:03:05,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 02:03:05,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 02:03:05,949 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-07 02:03:05,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 02:03:05,949 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 02:03:05,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [253043541] [2021-12-07 02:03:05,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [253043541] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 02:03:05,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 02:03:05,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 02:03:05,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432301952] [2021-12-07 02:03:05,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 02:03:05,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 02:03:05,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 02:03:05,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 02:03:05,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 02:03:05,950 INFO L87 Difference]: Start difference. First operand 417 states and 504 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 02:03:06,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 02:03:06,026 INFO L93 Difference]: Finished difference Result 467 states and 557 transitions. [2021-12-07 02:03:06,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 02:03:06,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 62 [2021-12-07 02:03:06,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 02:03:06,027 INFO L225 Difference]: With dead ends: 467 [2021-12-07 02:03:06,027 INFO L226 Difference]: Without dead ends: 467 [2021-12-07 02:03:06,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 58 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 02:03:06,028 INFO L933 BasicCegarLoop]: 368 mSDtfsCounter, 206 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 02:03:06,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 1254 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 02:03:06,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-12-07 02:03:06,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 410. [2021-12-07 02:03:06,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 275 states have (on average 1.6181818181818182) internal successors, (445), 372 states have internal predecessors, (445), 23 states have call successors, (23), 18 states have call predecessors, (23), 21 states have return successors, (28), 23 states have call predecessors, (28), 23 states have call successors, (28) [2021-12-07 02:03:06,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 496 transitions. [2021-12-07 02:03:06,033 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 496 transitions. Word has length 62 [2021-12-07 02:03:06,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 02:03:06,033 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 496 transitions. [2021-12-07 02:03:06,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 02:03:06,033 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 496 transitions. [2021-12-07 02:03:06,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-07 02:03:06,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 02:03:06,033 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 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, 1, 1, 1, 1] [2021-12-07 02:03:06,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (111)] Ended with exit code 0 [2021-12-07 02:03:06,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 02:03:06,235 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr78ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 02:03:06,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 02:03:06,236 INFO L85 PathProgramCache]: Analyzing trace with hash -697961265, now seen corresponding path program 1 times [2021-12-07 02:03:06,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 02:03:06,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [193035586] [2021-12-07 02:03:06,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 02:03:06,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 02:03:06,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 02:03:06,240 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 02:03:06,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2021-12-07 02:03:06,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 02:03:06,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 02:03:06,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 02:03:07,211 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-07 02:03:07,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 02:03:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-07 02:03:07,463 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 02:03:07,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [193035586] [2021-12-07 02:03:07,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [193035586] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 02:03:07,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 02:03:07,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-07 02:03:07,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556066401] [2021-12-07 02:03:07,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 02:03:07,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 02:03:07,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 02:03:07,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 02:03:07,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-07 02:03:07,465 INFO L87 Difference]: Start difference. First operand 410 states and 496 transitions. Second operand has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-07 02:03:07,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 02:03:07,699 INFO L93 Difference]: Finished difference Result 571 states and 680 transitions. [2021-12-07 02:03:07,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 02:03:07,700 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 64 [2021-12-07 02:03:07,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 02:03:07,701 INFO L225 Difference]: With dead ends: 571 [2021-12-07 02:03:07,701 INFO L226 Difference]: Without dead ends: 571 [2021-12-07 02:03:07,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-07 02:03:07,702 INFO L933 BasicCegarLoop]: 463 mSDtfsCounter, 209 mSDsluCounter, 1813 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 2276 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 02:03:07,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 2276 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 106 Unchecked, 0.2s Time] [2021-12-07 02:03:07,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-12-07 02:03:07,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 450. [2021-12-07 02:03:07,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 308 states have (on average 1.62012987012987) internal successors, (499), 408 states have internal predecessors, (499), 26 states have call successors, (26), 20 states have call predecessors, (26), 25 states have return successors, (36), 25 states have call predecessors, (36), 26 states have call successors, (36) [2021-12-07 02:03:07,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 561 transitions. [2021-12-07 02:03:07,707 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 561 transitions. Word has length 64 [2021-12-07 02:03:07,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 02:03:07,708 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 561 transitions. [2021-12-07 02:03:07,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-07 02:03:07,708 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 561 transitions. [2021-12-07 02:03:07,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-07 02:03:07,708 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 02:03:07,708 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1] [2021-12-07 02:03:07,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (112)] Ended with exit code 0 [2021-12-07 02:03:07,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 02:03:07,909 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 02:03:07,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 02:03:07,910 INFO L85 PathProgramCache]: Analyzing trace with hash -902698691, now seen corresponding path program 1 times [2021-12-07 02:03:07,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 02:03:07,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069112115] [2021-12-07 02:03:07,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 02:03:07,912 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 02:03:07,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 02:03:07,915 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 02:03:07,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (113)] Waiting until timeout for monitored process [2021-12-07 02:03:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 02:03:08,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 02:03:08,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 02:03:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-07 02:03:08,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 02:03:08,215 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 02:03:08,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069112115] [2021-12-07 02:03:08,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069112115] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 02:03:08,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 02:03:08,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 02:03:08,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942886408] [2021-12-07 02:03:08,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 02:03:08,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 02:03:08,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 02:03:08,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 02:03:08,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 02:03:08,216 INFO L87 Difference]: Start difference. First operand 450 states and 561 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-07 02:03:08,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 02:03:08,559 INFO L93 Difference]: Finished difference Result 462 states and 575 transitions. [2021-12-07 02:03:08,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 02:03:08,560 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 65 [2021-12-07 02:03:08,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 02:03:08,561 INFO L225 Difference]: With dead ends: 462 [2021-12-07 02:03:08,561 INFO L226 Difference]: Without dead ends: 459 [2021-12-07 02:03:08,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 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 02:03:08,561 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 3 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 02:03:08,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 919 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 02:03:08,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-12-07 02:03:08,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 459. [2021-12-07 02:03:08,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 315 states have (on average 1.6126984126984127) internal successors, (508), 417 states have internal predecessors, (508), 26 states have call successors, (26), 20 states have call predecessors, (26), 27 states have return successors, (38), 25 states have call predecessors, (38), 26 states have call successors, (38) [2021-12-07 02:03:08,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 572 transitions. [2021-12-07 02:03:08,567 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 572 transitions. Word has length 65 [2021-12-07 02:03:08,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 02:03:08,567 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 572 transitions. [2021-12-07 02:03:08,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-07 02:03:08,567 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 572 transitions. [2021-12-07 02:03:08,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-07 02:03:08,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 02:03:08,567 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 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, 1, 1, 1, 1, 1] [2021-12-07 02:03:08,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (113)] Ended with exit code 0 [2021-12-07 02:03:08,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 02:03:08,768 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr79ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 02:03:08,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 02:03:08,770 INFO L85 PathProgramCache]: Analyzing trace with hash -161962324, now seen corresponding path program 1 times [2021-12-07 02:03:08,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 02:03:08,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875354378] [2021-12-07 02:03:08,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 02:03:08,772 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 02:03:08,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 02:03:08,773 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 02:03:08,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2021-12-07 02:03:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 02:03:08,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 02:03:08,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 02:03:09,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-07 02:03:09,159 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 11 [2021-12-07 02:03:09,347 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 02:03:09,347 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 25 treesize of output 32 [2021-12-07 02:03:09,622 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 02:03:09,622 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 1 case distinctions, treesize of input 15 treesize of output 24 [2021-12-07 02:03:10,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 02:03:10,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 02:03:10,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-07 02:03:10,771 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 20 treesize of output 22 [2021-12-07 02:03:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 34 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 02:03:10,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 02:03:11,500 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 02:03:11,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875354378] [2021-12-07 02:03:11,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [875354378] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 02:03:11,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1726046487] [2021-12-07 02:03:11,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 02:03:11,501 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 02:03:11,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 02:03:11,502 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 02:03:11,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (115)] Waiting until timeout for monitored process [2021-12-07 02:03:11,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 02:03:11,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-07 02:03:11,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 02:03:12,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-07 02:03:12,094 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 11 treesize of output 9 [2021-12-07 02:03:12,251 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 02:03:12,252 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 25 treesize of output 32 [2021-12-07 02:03:12,446 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 02:03:12,447 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 1 case distinctions, treesize of input 21 treesize of output 30 [2021-12-07 02:03:13,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 02:03:13,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 02:03:13,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-07 02:03:13,215 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 20 treesize of output 22 [2021-12-07 02:03:13,266 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 34 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 02:03:13,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 02:03:13,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1726046487] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 02:03:13,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 02:03:13,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-12-07 02:03:13,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126170348] [2021-12-07 02:03:13,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 02:03:13,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-07 02:03:13,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 02:03:13,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-07 02:03:13,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-12-07 02:03:13,690 INFO L87 Difference]: Start difference. First operand 459 states and 572 transitions. Second operand has 16 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 13 states have internal predecessors, (50), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-07 02:03:15,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 02:03:15,763 INFO L93 Difference]: Finished difference Result 462 states and 575 transitions. [2021-12-07 02:03:15,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 02:03:15,765 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 13 states have internal predecessors, (50), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-07 02:03:15,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 02:03:15,766 INFO L225 Difference]: With dead ends: 462 [2021-12-07 02:03:15,766 INFO L226 Difference]: Without dead ends: 462 [2021-12-07 02:03:15,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 130 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-12-07 02:03:15,766 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 51 mSDsluCounter, 1352 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 637 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-07 02:03:15,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 1632 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 704 Invalid, 0 Unknown, 637 Unchecked, 2.0s Time] [2021-12-07 02:03:15,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-12-07 02:03:15,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2021-12-07 02:03:15,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 316 states have (on average 1.610759493670886) internal successors, (509), 418 states have internal predecessors, (509), 26 states have call successors, (26), 20 states have call predecessors, (26), 27 states have return successors, (38), 25 states have call predecessors, (38), 26 states have call successors, (38) [2021-12-07 02:03:15,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 573 transitions. [2021-12-07 02:03:15,774 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 573 transitions. Word has length 65 [2021-12-07 02:03:15,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 02:03:15,774 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 573 transitions. [2021-12-07 02:03:15,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 13 states have internal predecessors, (50), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-07 02:03:15,774 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 573 transitions. [2021-12-07 02:03:15,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-07 02:03:15,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 02:03:15,775 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1] [2021-12-07 02:03:15,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (114)] Ended with exit code 0 [2021-12-07 02:03:15,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (115)] Ended with exit code 0 [2021-12-07 02:03:16,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 02:03:16,176 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 02:03:16,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 02:03:16,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1163228186, now seen corresponding path program 1 times [2021-12-07 02:03:16,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 02:03:16,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201092293] [2021-12-07 02:03:16,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 02:03:16,180 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 02:03:16,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 02:03:16,182 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 02:03:16,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (116)] Waiting until timeout for monitored process [2021-12-07 02:03:16,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 02:03:16,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 02:03:16,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 02:03:16,511 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-07 02:03:16,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 02:03:16,657 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-07 02:03:16,657 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 02:03:16,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201092293] [2021-12-07 02:03:16,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201092293] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 02:03:16,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 02:03:16,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-07 02:03:16,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737463068] [2021-12-07 02:03:16,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 02:03:16,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 02:03:16,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 02:03:16,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 02:03:16,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-07 02:03:16,658 INFO L87 Difference]: Start difference. First operand 460 states and 573 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-07 02:03:18,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 02:03:18,545 INFO L93 Difference]: Finished difference Result 486 states and 610 transitions. [2021-12-07 02:03:18,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 02:03:18,546 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 66 [2021-12-07 02:03:18,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 02:03:18,547 INFO L225 Difference]: With dead ends: 486 [2021-12-07 02:03:18,547 INFO L226 Difference]: Without dead ends: 486 [2021-12-07 02:03:18,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-12-07 02:03:18,547 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 27 mSDsluCounter, 1212 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1520 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-07 02:03:18,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 1520 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-07 02:03:18,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-12-07 02:03:18,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 477. [2021-12-07 02:03:18,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 332 states have (on average 1.605421686746988) internal successors, (533), 433 states have internal predecessors, (533), 26 states have call successors, (26), 22 states have call predecessors, (26), 28 states have return successors, (39), 25 states have call predecessors, (39), 26 states have call successors, (39) [2021-12-07 02:03:18,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 598 transitions. [2021-12-07 02:03:18,553 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 598 transitions. Word has length 66 [2021-12-07 02:03:18,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 02:03:18,553 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 598 transitions. [2021-12-07 02:03:18,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-07 02:03:18,553 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 598 transitions. [2021-12-07 02:03:18,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-07 02:03:18,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 02:03:18,554 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 02:03:18,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (116)] Ended with exit code 0 [2021-12-07 02:03:18,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 02:03:18,754 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr81ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 02:03:18,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 02:03:18,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1026957458, now seen corresponding path program 1 times [2021-12-07 02:03:18,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 02:03:18,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1987859109] [2021-12-07 02:03:18,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 02:03:18,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 02:03:18,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 02:03:18,760 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 02:03:18,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (117)] Waiting until timeout for monitored process [2021-12-07 02:03:18,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 02:03:18,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 02:03:18,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 02:03:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-07 02:03:19,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 02:03:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-07 02:03:20,074 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 02:03:20,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1987859109] [2021-12-07 02:03:20,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1987859109] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 02:03:20,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 02:03:20,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-07 02:03:20,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207616221] [2021-12-07 02:03:20,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 02:03:20,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 02:03:20,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 02:03:20,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 02:03:20,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-07 02:03:20,075 INFO L87 Difference]: Start difference. First operand 477 states and 598 transitions. Second operand has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 8 states have internal predecessors, (88), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-07 02:03:20,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 02:03:20,089 INFO L93 Difference]: Finished difference Result 479 states and 600 transitions. [2021-12-07 02:03:20,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 02:03:20,089 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 8 states have internal predecessors, (88), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 67 [2021-12-07 02:03:20,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 02:03:20,090 INFO L225 Difference]: With dead ends: 479 [2021-12-07 02:03:20,090 INFO L226 Difference]: Without dead ends: 479 [2021-12-07 02:03:20,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-07 02:03:20,091 INFO L933 BasicCegarLoop]: 302 mSDtfsCounter, 56 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 02:03:20,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 919 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 50 Unchecked, 0.0s Time] [2021-12-07 02:03:20,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-12-07 02:03:20,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 479. [2021-12-07 02:03:20,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 334 states have (on average 1.6017964071856288) internal successors, (535), 435 states have internal predecessors, (535), 26 states have call successors, (26), 22 states have call predecessors, (26), 28 states have return successors, (39), 25 states have call predecessors, (39), 26 states have call successors, (39) [2021-12-07 02:03:20,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 600 transitions. [2021-12-07 02:03:20,097 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 600 transitions. Word has length 67 [2021-12-07 02:03:20,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 02:03:20,097 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 600 transitions. [2021-12-07 02:03:20,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 8 states have internal predecessors, (88), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-07 02:03:20,097 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 600 transitions. [2021-12-07 02:03:20,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-07 02:03:20,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 02:03:20,097 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 02:03:20,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (117)] Forceful destruction successful, exit code 0 [2021-12-07 02:03:20,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 02:03:20,298 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr82ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-07 02:03:20,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 02:03:20,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1770909708, now seen corresponding path program 1 times [2021-12-07 02:03:20,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 02:03:20,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1365714691] [2021-12-07 02:03:20,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 02:03:20,301 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 02:03:20,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 02:03:20,302 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 02:03:20,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (118)] Waiting until timeout for monitored process [2021-12-07 02:03:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 02:03:20,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-07 02:03:20,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 02:03:20,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-07 02:03:20,763 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 10 treesize of output 8 [2021-12-07 02:03:20,929 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 02:03:20,929 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 23 treesize of output 30 [2021-12-07 02:03:21,156 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 10 treesize of output 8 [2021-12-07 02:03:21,316 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 02:03:21,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 30 treesize of output 37 [2021-12-07 02:03:21,769 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 02:03:21,769 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 1 case distinctions, treesize of input 21 treesize of output 30 [2021-12-07 02:03:23,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 02:03:23,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 02:03:23,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 28 [2021-12-07 02:03:24,204 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 23 treesize of output 25 [2021-12-07 02:03:24,538 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 23 treesize of output 25 [2021-12-07 02:03:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 34 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 02:03:24,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 02:03:25,668 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 02:03:25,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1365714691] [2021-12-07 02:03:25,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1365714691] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 02:03:25,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1694235214] [2021-12-07 02:03:25,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 02:03:25,669 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 02:03:25,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 02:03:25,669 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 02:03:25,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2f71ed2-4e3a-42bd-b7e0-720e0b95d17a/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (119)] Waiting until timeout for monitored process [2021-12-07 02:03:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 02:03:26,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-07 02:03:26,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 02:03:26,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-07 02:03:26,349 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 10 treesize of output 8 [2021-12-07 02:03:26,494 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 02:03:26,494 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 23 treesize of output 30 [2021-12-07 02:03:26,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 14 treesize of output 12 [2021-12-07 02:03:26,956 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 02:03:26,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 23 treesize of output 30 [2021-12-07 02:03:27,715 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 02:03:27,715 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 1 case distinctions, treesize of input 17 treesize of output 26