./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test10-2.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_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/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_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test10-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/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_aa531194-7228-43d6-844d-662a73021219/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 5fd80c822f4c545ea9a48882a667e8fa2630e37e10bf15ea7aea35e48f16af74 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:37:54,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:37:54,571 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:37:54,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:37:54,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:37:54,604 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:37:54,606 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:37:54,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:37:54,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:37:54,611 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:37:54,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:37:54,613 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:37:54,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:37:54,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:37:54,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:37:54,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:37:54,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:37:54,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:37:54,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:37:54,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:37:54,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:37:54,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:37:54,628 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:37:54,629 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:37:54,633 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:37:54,633 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:37:54,634 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:37:54,635 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:37:54,635 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:37:54,636 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:37:54,637 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:37:54,637 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:37:54,638 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:37:54,638 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:37:54,639 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:37:54,640 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:37:54,640 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:37:54,640 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:37:54,641 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:37:54,642 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:37:54,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:37:54,643 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-06 17:37:54,666 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:37:54,667 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:37:54,667 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:37:54,667 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:37:54,668 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:37:54,668 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:37:54,669 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:37:54,669 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:37:54,669 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:37:54,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:37:54,669 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:37:54,670 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 17:37:54,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:37:54,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:37:54,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:37:54,670 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 17:37:54,670 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 17:37:54,670 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 17:37:54,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:37:54,671 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 17:37:54,671 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:37:54,671 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:37:54,671 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:37:54,671 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:37:54,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:37:54,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:37:54,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:37:54,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:37:54,672 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:37:54,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:37:54,672 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:37:54,672 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_aa531194-7228-43d6-844d-662a73021219/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fd80c822f4c545ea9a48882a667e8fa2630e37e10bf15ea7aea35e48f16af74 [2021-12-06 17:37:54,869 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:37:54,885 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:37:54,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:37:54,887 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:37:54,888 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:37:54,889 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/ldv-memsafety/memleaks_test10-2.i [2021-12-06 17:37:54,929 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/data/b6ecdbd39/ae9ea3617483486eb7d46f2a4cefc35b/FLAG03c969062 [2021-12-06 17:37:55,356 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:37:55,356 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/sv-benchmarks/c/ldv-memsafety/memleaks_test10-2.i [2021-12-06 17:37:55,367 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/data/b6ecdbd39/ae9ea3617483486eb7d46f2a4cefc35b/FLAG03c969062 [2021-12-06 17:37:55,377 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/data/b6ecdbd39/ae9ea3617483486eb7d46f2a4cefc35b [2021-12-06 17:37:55,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:37:55,380 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:37:55,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:37:55,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:37:55,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:37:55,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:37:55" (1/1) ... [2021-12-06 17:37:55,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25eb2b32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:37:55, skipping insertion in model container [2021-12-06 17:37:55,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:37:55" (1/1) ... [2021-12-06 17:37:55,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:37:55,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:37:55,666 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:37:55,679 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) [2021-12-06 17:37:55,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3908aa61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:37:55, skipping insertion in model container [2021-12-06 17:37:55,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:37:55,680 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-06 17:37:55,682 INFO L158 Benchmark]: Toolchain (without parser) took 301.46ms. Allocated memory is still 117.4MB. Free memory was 79.1MB in the beginning and 65.3MB in the end (delta: 13.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-06 17:37:55,682 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 117.4MB. Free memory was 97.1MB in the beginning and 97.0MB in the end (delta: 89.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 17:37:55,683 INFO L158 Benchmark]: CACSL2BoogieTranslator took 299.54ms. Allocated memory is still 117.4MB. Free memory was 78.8MB in the beginning and 65.4MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-06 17:37:55,684 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 117.4MB. Free memory was 97.1MB in the beginning and 97.0MB in the end (delta: 89.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 299.54ms. Allocated memory is still 117.4MB. Free memory was 78.8MB in the beginning and 65.4MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. 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_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/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_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test10-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/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_aa531194-7228-43d6-844d-662a73021219/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 5fd80c822f4c545ea9a48882a667e8fa2630e37e10bf15ea7aea35e48f16af74 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:37:57,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:37:57,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:37:57,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:37:57,120 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:37:57,121 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:37:57,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:37:57,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:37:57,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:37:57,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:37:57,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:37:57,131 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:37:57,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:37:57,133 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:37:57,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:37:57,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:37:57,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:37:57,138 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:37:57,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:37:57,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:37:57,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:37:57,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:37:57,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:37:57,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:37:57,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:37:57,160 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:37:57,160 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:37:57,161 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:37:57,162 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:37:57,163 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:37:57,163 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:37:57,164 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:37:57,165 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:37:57,166 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:37:57,166 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:37:57,167 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:37:57,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:37:57,167 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:37:57,167 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:37:57,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:37:57,168 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:37:57,169 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-06 17:37:57,194 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:37:57,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:37:57,194 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:37:57,194 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:37:57,195 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:37:57,195 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:37:57,196 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:37:57,196 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:37:57,196 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:37:57,197 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:37:57,197 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:37:57,197 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 17:37:57,197 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:37:57,197 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:37:57,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:37:57,198 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 17:37:57,198 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 17:37:57,198 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 17:37:57,198 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:37:57,199 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 17:37:57,199 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-06 17:37:57,199 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-06 17:37:57,199 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:37:57,199 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:37:57,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:37:57,200 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:37:57,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:37:57,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:37:57,201 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:37:57,201 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:37:57,201 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-06 17:37:57,201 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-06 17:37:57,201 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:37:57,201 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-06 17:37:57,202 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_aa531194-7228-43d6-844d-662a73021219/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fd80c822f4c545ea9a48882a667e8fa2630e37e10bf15ea7aea35e48f16af74 [2021-12-06 17:37:57,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:37:57,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:37:57,454 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:37:57,455 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:37:57,456 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:37:57,456 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/ldv-memsafety/memleaks_test10-2.i [2021-12-06 17:37:57,498 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/data/878274cf8/27d5c274b3e94c6ab02936427ff58b7b/FLAG1ce1a77d5 [2021-12-06 17:37:57,968 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:37:57,968 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/sv-benchmarks/c/ldv-memsafety/memleaks_test10-2.i [2021-12-06 17:37:57,979 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/data/878274cf8/27d5c274b3e94c6ab02936427ff58b7b/FLAG1ce1a77d5 [2021-12-06 17:37:57,989 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/data/878274cf8/27d5c274b3e94c6ab02936427ff58b7b [2021-12-06 17:37:57,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:37:57,992 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:37:57,992 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:37:57,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:37:57,995 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:37:57,996 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:37:57" (1/1) ... [2021-12-06 17:37:57,997 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b1982c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:37:57, skipping insertion in model container [2021-12-06 17:37:57,997 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:37:57" (1/1) ... [2021-12-06 17:37:58,001 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:37:58,028 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:37:58,273 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:37:58,286 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-06 17:37:58,292 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:37:58,326 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:37:58,332 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:37:58,367 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:37:58,398 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:37:58,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:37:58 WrapperNode [2021-12-06 17:37:58,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:37:58,399 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:37:58,399 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:37:58,399 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:37:58,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:37:58" (1/1) ... [2021-12-06 17:37:58,421 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:37:58" (1/1) ... [2021-12-06 17:37:58,438 INFO L137 Inliner]: procedures = 167, calls = 92, calls flagged for inlining = 23, calls inlined = 5, statements flattened = 78 [2021-12-06 17:37:58,438 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:37:58,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:37:58,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:37:58,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:37:58,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:37:58" (1/1) ... [2021-12-06 17:37:58,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:37:58" (1/1) ... [2021-12-06 17:37:58,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:37:58" (1/1) ... [2021-12-06 17:37:58,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:37:58" (1/1) ... [2021-12-06 17:37:58,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:37:58" (1/1) ... [2021-12-06 17:37:58,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:37:58" (1/1) ... [2021-12-06 17:37:58,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:37:58" (1/1) ... [2021-12-06 17:37:58,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:37:58,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:37:58,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:37:58,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:37:58,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:37:58" (1/1) ... [2021-12-06 17:37:58,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:37:58,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:37:58,485 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:37:58,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:37:58,519 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-06 17:37:58,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-06 17:37:58,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 17:37:58,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:37:58,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 17:37:58,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 17:37:58,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 17:37:58,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 17:37:58,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:37:58,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:37:58,604 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:37:58,605 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:37:58,900 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:37:58,908 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:37:58,908 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-06 17:37:58,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:37:58 BoogieIcfgContainer [2021-12-06 17:37:58,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:37:58,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:37:58,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:37:58,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:37:58,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:37:57" (1/3) ... [2021-12-06 17:37:58,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eb69c76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:37:58, skipping insertion in model container [2021-12-06 17:37:58,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:37:58" (2/3) ... [2021-12-06 17:37:58,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eb69c76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:37:58, skipping insertion in model container [2021-12-06 17:37:58,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:37:58" (3/3) ... [2021-12-06 17:37:58,917 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test10-2.i [2021-12-06 17:37:58,921 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:37:58,921 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 43 error locations. [2021-12-06 17:37:58,966 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:37:58,973 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 [2021-12-06 17:37:58,973 INFO L340 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2021-12-06 17:37:58,989 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 87 states have internal predecessors, (91), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 17:37:58,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 17:37:58,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:37:58,995 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:37:58,995 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:37:58,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:37:58,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1192529059, now seen corresponding path program 1 times [2021-12-06 17:37:59,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:37:59,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [301679269] [2021-12-06 17:37:59,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:37:59,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:37:59,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:37:59,010 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:37:59,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 17:37:59,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:37:59,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:37:59,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:37:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:37:59,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:37:59,143 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:37:59,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [301679269] [2021-12-06 17:37:59,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [301679269] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:37:59,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:37:59,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:37:59,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447156744] [2021-12-06 17:37:59,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:37:59,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:37:59,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:37:59,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:37:59,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:37:59,170 INFO L87 Difference]: Start difference. First operand has 93 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 87 states have internal predecessors, (91), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 17:37:59,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:37:59,322 INFO L93 Difference]: Finished difference Result 180 states and 197 transitions. [2021-12-06 17:37:59,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:37:59,324 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 [2021-12-06 17:37:59,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:37:59,331 INFO L225 Difference]: With dead ends: 180 [2021-12-06 17:37:59,331 INFO L226 Difference]: Without dead ends: 176 [2021-12-06 17:37:59,333 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 [2021-12-06 17:37:59,335 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 83 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:37:59,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 492 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:37:59,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-06 17:37:59,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 95. [2021-12-06 17:37:59,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 46 states have (on average 2.0) internal successors, (92), 88 states have internal predecessors, (92), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 17:37:59,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2021-12-06 17:37:59,371 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 11 [2021-12-06 17:37:59,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:37:59,372 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2021-12-06 17:37:59,372 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) [2021-12-06 17:37:59,372 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2021-12-06 17:37:59,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 17:37:59,373 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:37:59,373 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:37:59,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:37:59,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:37:59,575 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:37:59,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:37:59,578 INFO L85 PathProgramCache]: Analyzing trace with hash 2080032740, now seen corresponding path program 1 times [2021-12-06 17:37:59,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:37:59,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228529928] [2021-12-06 17:37:59,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:37:59,580 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:37:59,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:37:59,583 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:37:59,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 17:37:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:37:59,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:37:59,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:37:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:37:59,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:37:59,767 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:37:59,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228529928] [2021-12-06 17:37:59,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228529928] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:37:59,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:37:59,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:37:59,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522592081] [2021-12-06 17:37:59,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:37:59,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:37:59,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:37:59,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:37:59,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:37:59,770 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 17:37:59,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:37:59,980 INFO L93 Difference]: Finished difference Result 163 states and 179 transitions. [2021-12-06 17:37:59,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:37:59,980 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-12-06 17:37:59,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:37:59,982 INFO L225 Difference]: With dead ends: 163 [2021-12-06 17:37:59,982 INFO L226 Difference]: Without dead ends: 161 [2021-12-06 17:37:59,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:37:59,983 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 63 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:37:59,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 281 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:37:59,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-06 17:37:59,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 91. [2021-12-06 17:37:59,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 43 states have (on average 2.046511627906977) internal successors, (88), 85 states have internal predecessors, (88), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 17:37:59,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2021-12-06 17:37:59,992 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 11 [2021-12-06 17:37:59,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:37:59,992 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2021-12-06 17:37:59,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 17:37:59,992 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2021-12-06 17:37:59,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 17:37:59,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:37:59,993 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:37:59,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-06 17:38:00,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:38:00,194 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:38:00,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:38:00,195 INFO L85 PathProgramCache]: Analyzing trace with hash -895923568, now seen corresponding path program 1 times [2021-12-06 17:38:00,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:38:00,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176468944] [2021-12-06 17:38:00,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:38:00,197 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:38:00,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:38:00,198 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:38:00,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-06 17:38:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:38:00,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 17:38:00,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:38:00,322 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 [2021-12-06 17:38:00,439 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 17:38:00,439 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 [2021-12-06 17:38:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:38:00,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:38:00,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:38:00,643 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:38:00,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176468944] [2021-12-06 17:38:00,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176468944] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:38:00,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:38:00,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-12-06 17:38:00,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671120414] [2021-12-06 17:38:00,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:38:00,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:38:00,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:38:00,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:38:00,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:38:00,645 INFO L87 Difference]: Start difference. First operand 91 states and 96 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 17:38:00,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:38:00,976 INFO L93 Difference]: Finished difference Result 129 states and 139 transitions. [2021-12-06 17:38:00,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:38:00,976 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 15 [2021-12-06 17:38:00,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:38:00,978 INFO L225 Difference]: With dead ends: 129 [2021-12-06 17:38:00,978 INFO L226 Difference]: Without dead ends: 129 [2021-12-06 17:38:00,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:38:00,980 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 65 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:38:00,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 336 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 297 Invalid, 0 Unknown, 152 Unchecked, 0.3s Time] [2021-12-06 17:38:00,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-06 17:38:00,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 102. [2021-12-06 17:38:00,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 54 states have (on average 1.9259259259259258) internal successors, (104), 93 states have internal predecessors, (104), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-06 17:38:00,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2021-12-06 17:38:00,990 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 15 [2021-12-06 17:38:00,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:38:00,990 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2021-12-06 17:38:00,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 17:38:00,991 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2021-12-06 17:38:00,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 17:38:00,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:38:00,991 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:38:00,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-06 17:38:01,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:38:01,193 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:38:01,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:38:01,195 INFO L85 PathProgramCache]: Analyzing trace with hash -895923567, now seen corresponding path program 1 times [2021-12-06 17:38:01,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:38:01,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213712486] [2021-12-06 17:38:01,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:38:01,197 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:38:01,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:38:01,200 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:38:01,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-06 17:38:01,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:38:01,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 17:38:01,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:38:01,364 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 [2021-12-06 17:38:05,505 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 17:38:05,505 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 [2021-12-06 17:38:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:38:05,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:38:05,751 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:38:05,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213712486] [2021-12-06 17:38:05,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213712486] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:38:05,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1252476366] [2021-12-06 17:38:05,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:38:05,751 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:38:05,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:38:05,752 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:38:05,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-12-06 17:38:05,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:38:05,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 17:38:05,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:38:05,850 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 [2021-12-06 17:38:05,855 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 [2021-12-06 17:38:10,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:38:10,116 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 [2021-12-06 17:38:10,125 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:38:10,125 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 [2021-12-06 17:38:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:38:10,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:38:12,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1252476366] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:38:12,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:38:12,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-12-06 17:38:12,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104449443] [2021-12-06 17:38:12,381 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:38:12,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 17:38:12,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:38:12,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 17:38:12,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=225, Unknown=4, NotChecked=0, Total=272 [2021-12-06 17:38:12,382 INFO L87 Difference]: Start difference. First operand 102 states and 119 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 17:38:17,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:38:17,132 INFO L93 Difference]: Finished difference Result 177 states and 198 transitions. [2021-12-06 17:38:17,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:38:17,133 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 15 [2021-12-06 17:38:17,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:38:17,134 INFO L225 Difference]: With dead ends: 177 [2021-12-06 17:38:17,134 INFO L226 Difference]: Without dead ends: 177 [2021-12-06 17:38:17,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=56, Invalid=280, Unknown=6, NotChecked=0, Total=342 [2021-12-06 17:38:17,135 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 135 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:38:17,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 596 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 567 Invalid, 0 Unknown, 158 Unchecked, 0.6s Time] [2021-12-06 17:38:17,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-06 17:38:17,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 137. [2021-12-06 17:38:17,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 87 states have (on average 1.9195402298850575) internal successors, (167), 126 states have internal predecessors, (167), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (14), 9 states have call predecessors, (14), 7 states have call successors, (14) [2021-12-06 17:38:17,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 188 transitions. [2021-12-06 17:38:17,144 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 188 transitions. Word has length 15 [2021-12-06 17:38:17,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:38:17,144 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 188 transitions. [2021-12-06 17:38:17,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 17:38:17,144 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 188 transitions. [2021-12-06 17:38:17,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 17:38:17,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:38:17,145 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:38:17,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-06 17:38:17,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-12-06 17:38:17,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:38:17,548 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:38:17,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:38:17,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1602092369, now seen corresponding path program 1 times [2021-12-06 17:38:17,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:38:17,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941303125] [2021-12-06 17:38:17,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:38:17,551 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:38:17,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:38:17,554 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:38:17,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-06 17:38:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:38:17,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:38:17,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:38:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:38:17,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:38:17,646 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:38:17,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1941303125] [2021-12-06 17:38:17,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1941303125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:38:17,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:38:17,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:38:17,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520139586] [2021-12-06 17:38:17,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:38:17,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:38:17,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:38:17,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:38:17,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:38:17,647 INFO L87 Difference]: Start difference. First operand 137 states and 188 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 17:38:17,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:38:17,694 INFO L93 Difference]: Finished difference Result 122 states and 163 transitions. [2021-12-06 17:38:17,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:38:17,695 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2021-12-06 17:38:17,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:38:17,696 INFO L225 Difference]: With dead ends: 122 [2021-12-06 17:38:17,696 INFO L226 Difference]: Without dead ends: 120 [2021-12-06 17:38:17,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:38:17,697 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 0 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:38:17,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 351 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:38:17,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-06 17:38:17,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-12-06 17:38:17,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 76 states have (on average 1.9342105263157894) internal successors, (147), 112 states have internal predecessors, (147), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-06 17:38:17,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 161 transitions. [2021-12-06 17:38:17,703 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 161 transitions. Word has length 15 [2021-12-06 17:38:17,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:38:17,704 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 161 transitions. [2021-12-06 17:38:17,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 17:38:17,704 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 161 transitions. [2021-12-06 17:38:17,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 17:38:17,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:38:17,704 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:38:17,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-06 17:38:17,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:38:17,906 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:38:17,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:38:17,908 INFO L85 PathProgramCache]: Analyzing trace with hash 684574475, now seen corresponding path program 1 times [2021-12-06 17:38:17,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:38:17,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1593998947] [2021-12-06 17:38:17,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:38:17,909 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:38:17,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:38:17,911 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:38:17,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-06 17:38:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:38:17,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:38:17,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:38:17,990 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 [2021-12-06 17:38:18,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-06 17:38:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:38:18,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:38:18,012 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:38:18,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1593998947] [2021-12-06 17:38:18,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1593998947] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:38:18,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:38:18,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:38:18,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735437886] [2021-12-06 17:38:18,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:38:18,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:38:18,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:38:18,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:38:18,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:38:18,014 INFO L87 Difference]: Start difference. First operand 120 states and 161 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 17:38:18,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:38:18,134 INFO L93 Difference]: Finished difference Result 130 states and 175 transitions. [2021-12-06 17:38:18,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:38:18,134 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-12-06 17:38:18,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:38:18,135 INFO L225 Difference]: With dead ends: 130 [2021-12-06 17:38:18,135 INFO L226 Difference]: Without dead ends: 130 [2021-12-06 17:38:18,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:38:18,136 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 5 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:38:18,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 406 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:38:18,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-06 17:38:18,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2021-12-06 17:38:18,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 80 states have (on average 1.8875) internal successors, (151), 115 states have internal predecessors, (151), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-06 17:38:18,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 165 transitions. [2021-12-06 17:38:18,142 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 165 transitions. Word has length 20 [2021-12-06 17:38:18,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:38:18,143 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 165 transitions. [2021-12-06 17:38:18,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 17:38:18,143 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 165 transitions. [2021-12-06 17:38:18,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 17:38:18,143 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:38:18,144 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:38:18,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-06 17:38:18,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:38:18,345 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:38:18,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:38:18,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1122879988, now seen corresponding path program 1 times [2021-12-06 17:38:18,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:38:18,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18482303] [2021-12-06 17:38:18,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:38:18,349 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:38:18,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:38:18,351 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:38:18,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-06 17:38:18,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:38:18,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 17:38:18,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:38:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:38:18,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:38:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:38:18,703 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:38:18,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18482303] [2021-12-06 17:38:18,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18482303] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:38:18,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:38:18,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-06 17:38:18,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121855226] [2021-12-06 17:38:18,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:38:18,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 17:38:18,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:38:18,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 17:38:18,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:38:18,705 INFO L87 Difference]: Start difference. First operand 124 states and 165 transitions. Second operand has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 17:38:18,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:38:18,975 INFO L93 Difference]: Finished difference Result 127 states and 167 transitions. [2021-12-06 17:38:18,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:38:18,976 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 20 [2021-12-06 17:38:18,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:38:18,977 INFO L225 Difference]: With dead ends: 127 [2021-12-06 17:38:18,977 INFO L226 Difference]: Without dead ends: 127 [2021-12-06 17:38:18,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:38:18,978 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 152 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:38:18,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 294 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 179 Invalid, 0 Unknown, 10 Unchecked, 0.2s Time] [2021-12-06 17:38:18,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-06 17:38:18,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-12-06 17:38:18,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 83 states have (on average 1.8433734939759037) internal successors, (153), 117 states have internal predecessors, (153), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-06 17:38:18,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 167 transitions. [2021-12-06 17:38:18,983 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 167 transitions. Word has length 20 [2021-12-06 17:38:18,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:38:18,983 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 167 transitions. [2021-12-06 17:38:18,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 17:38:18,983 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 167 transitions. [2021-12-06 17:38:18,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 17:38:18,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:38:18,984 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] [2021-12-06 17:38:18,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-06 17:38:19,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:38:19,185 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:38:19,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:38:19,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1782681151, now seen corresponding path program 1 times [2021-12-06 17:38:19,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:38:19,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142213701] [2021-12-06 17:38:19,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:38:19,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:38:19,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:38:19,187 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:38:19,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-06 17:38:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:38:19,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 17:38:19,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:38:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:38:21,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:38:21,504 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:38:21,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142213701] [2021-12-06 17:38:21,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142213701] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:38:21,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1564577916] [2021-12-06 17:38:21,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:38:21,505 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:38:21,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:38:21,505 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:38:21,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-12-06 17:38:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:38:21,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 17:38:21,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:38:21,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:38:21,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:38:21,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1564577916] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:38:21,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:38:21,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-12-06 17:38:21,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139738477] [2021-12-06 17:38:21,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:38:21,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 17:38:21,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:38:21,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 17:38:21,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=123, Unknown=1, NotChecked=0, Total=156 [2021-12-06 17:38:21,866 INFO L87 Difference]: Start difference. First operand 127 states and 167 transitions. Second operand has 12 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 17:38:22,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:38:22,008 INFO L93 Difference]: Finished difference Result 136 states and 174 transitions. [2021-12-06 17:38:22,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 17:38:22,008 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 23 [2021-12-06 17:38:22,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:38:22,009 INFO L225 Difference]: With dead ends: 136 [2021-12-06 17:38:22,009 INFO L226 Difference]: Without dead ends: 129 [2021-12-06 17:38:22,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=40, Invalid=169, Unknown=1, NotChecked=0, Total=210 [2021-12-06 17:38:22,010 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 9 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:38:22,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 421 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 120 Invalid, 0 Unknown, 249 Unchecked, 0.1s Time] [2021-12-06 17:38:22,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-06 17:38:22,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2021-12-06 17:38:22,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 79 states have (on average 1.8734177215189873) internal successors, (148), 114 states have internal predecessors, (148), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-06 17:38:22,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 162 transitions. [2021-12-06 17:38:22,015 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 162 transitions. Word has length 23 [2021-12-06 17:38:22,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:38:22,015 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 162 transitions. [2021-12-06 17:38:22,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 17:38:22,015 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 162 transitions. [2021-12-06 17:38:22,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 17:38:22,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:38:22,018 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:38:22,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-06 17:38:22,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2021-12-06 17:38:22,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:38:22,420 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:38:22,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:38:22,422 INFO L85 PathProgramCache]: Analyzing trace with hash -931351798, now seen corresponding path program 1 times [2021-12-06 17:38:22,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:38:22,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1396121463] [2021-12-06 17:38:22,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:38:22,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:38:22,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:38:22,426 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:38:22,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-06 17:38:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:38:22,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 17:38:22,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:38:22,516 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 [2021-12-06 17:38:22,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:38:22,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-12-06 17:38:22,628 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 17:38:22,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 24 [2021-12-06 17:38:22,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:38:22,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:38:22,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:38:22,825 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:38:22,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1396121463] [2021-12-06 17:38:22,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1396121463] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:38:22,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:38:22,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-12-06 17:38:22,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201561854] [2021-12-06 17:38:22,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:38:22,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 17:38:22,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:38:22,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 17:38:22,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:38:22,826 INFO L87 Difference]: Start difference. First operand 124 states and 162 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 17:38:23,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:38:23,145 INFO L93 Difference]: Finished difference Result 134 states and 174 transitions. [2021-12-06 17:38:23,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:38:23,146 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2021-12-06 17:38:23,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:38:23,147 INFO L225 Difference]: With dead ends: 134 [2021-12-06 17:38:23,147 INFO L226 Difference]: Without dead ends: 134 [2021-12-06 17:38:23,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-06 17:38:23,148 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 7 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:38:23,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 366 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 240 Invalid, 0 Unknown, 77 Unchecked, 0.3s Time] [2021-12-06 17:38:23,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-06 17:38:23,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2021-12-06 17:38:23,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 86 states have (on average 1.8255813953488371) internal successors, (157), 119 states have internal predecessors, (157), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2021-12-06 17:38:23,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 174 transitions. [2021-12-06 17:38:23,152 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 174 transitions. Word has length 25 [2021-12-06 17:38:23,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:38:23,152 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 174 transitions. [2021-12-06 17:38:23,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 17:38:23,152 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 174 transitions. [2021-12-06 17:38:23,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 17:38:23,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:38:23,153 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:38:23,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-06 17:38:23,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:38:23,354 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:38:23,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:38:23,355 INFO L85 PathProgramCache]: Analyzing trace with hash -931351797, now seen corresponding path program 1 times [2021-12-06 17:38:23,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:38:23,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [852200654] [2021-12-06 17:38:23,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:38:23,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:38:23,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:38:23,359 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:38:23,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-06 17:38:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:38:23,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 17:38:23,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:38:23,534 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 [2021-12-06 17:38:23,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:38:23,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:38:23,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-06 17:38:23,607 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 [2021-12-06 17:38:27,725 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 17:38:27,725 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 [2021-12-06 17:38:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:38:27,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:38:27,997 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:38:27,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [852200654] [2021-12-06 17:38:27,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [852200654] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:38:27,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1337097144] [2021-12-06 17:38:27,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:38:27,997 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:38:27,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:38:27,998 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:38:27,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-12-06 17:38:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:38:28,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 17:38:28,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:38:28,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-12-06 17:38:28,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:38:28,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:38:28,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:38:28,254 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 [2021-12-06 17:38:28,258 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 [2021-12-06 17:38:32,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:38:32,449 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 [2021-12-06 17:38:32,456 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:38:32,456 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 [2021-12-06 17:38:32,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:38:32,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:38:32,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1337097144] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:38:32,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:38:32,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-12-06 17:38:32,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729989736] [2021-12-06 17:38:32,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:38:32,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 17:38:32,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:38:32,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 17:38:32,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=290, Unknown=4, NotChecked=0, Total=342 [2021-12-06 17:38:32,691 INFO L87 Difference]: Start difference. First operand 132 states and 174 transitions. Second operand has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 17:38:37,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:38:37,359 INFO L93 Difference]: Finished difference Result 134 states and 174 transitions. [2021-12-06 17:38:37,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:38:37,360 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 25 [2021-12-06 17:38:37,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:38:37,361 INFO L225 Difference]: With dead ends: 134 [2021-12-06 17:38:37,361 INFO L226 Difference]: Without dead ends: 134 [2021-12-06 17:38:37,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=76, Invalid=424, Unknown=6, NotChecked=0, Total=506 [2021-12-06 17:38:37,362 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 9 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:38:37,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 600 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 366 Invalid, 0 Unknown, 93 Unchecked, 0.5s Time] [2021-12-06 17:38:37,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-06 17:38:37,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2021-12-06 17:38:37,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 86 states have (on average 1.802325581395349) internal successors, (155), 119 states have internal predecessors, (155), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2021-12-06 17:38:37,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 172 transitions. [2021-12-06 17:38:37,366 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 172 transitions. Word has length 25 [2021-12-06 17:38:37,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:38:37,366 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 172 transitions. [2021-12-06 17:38:37,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 17:38:37,366 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 172 transitions. [2021-12-06 17:38:37,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 17:38:37,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:38:37,367 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] [2021-12-06 17:38:37,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-06 17:38:37,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-12-06 17:38:37,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:38:37,769 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:38:37,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:38:37,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1436910423, now seen corresponding path program 1 times [2021-12-06 17:38:37,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:38:37,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976002288] [2021-12-06 17:38:37,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:38:37,772 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:38:37,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:38:37,774 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:38:37,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-06 17:38:37,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:38:37,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 17:38:37,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:38:37,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:38:37,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:38:37,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:38:37,904 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 [2021-12-06 17:38:37,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:38:37,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:38:37,920 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:38:37,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976002288] [2021-12-06 17:38:37,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976002288] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:38:37,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:38:37,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:38:37,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981520058] [2021-12-06 17:38:37,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:38:37,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:38:37,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:38:37,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:38:37,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:38:37,922 INFO L87 Difference]: Start difference. First operand 132 states and 172 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 17:38:38,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:38:38,041 INFO L93 Difference]: Finished difference Result 126 states and 161 transitions. [2021-12-06 17:38:38,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:38:38,041 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-12-06 17:38:38,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:38:38,042 INFO L225 Difference]: With dead ends: 126 [2021-12-06 17:38:38,042 INFO L226 Difference]: Without dead ends: 120 [2021-12-06 17:38:38,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:38:38,043 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 2 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:38:38,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 406 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:38:38,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-06 17:38:38,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-12-06 17:38:38,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 78 states have (on average 1.8205128205128205) internal successors, (142), 110 states have internal predecessors, (142), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-06 17:38:38,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 155 transitions. [2021-12-06 17:38:38,046 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 155 transitions. Word has length 25 [2021-12-06 17:38:38,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:38:38,046 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 155 transitions. [2021-12-06 17:38:38,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 17:38:38,047 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 155 transitions. [2021-12-06 17:38:38,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 17:38:38,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:38:38,047 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:38:38,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-06 17:38:38,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:38:38,248 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:38:38,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:38:38,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1675880117, now seen corresponding path program 1 times [2021-12-06 17:38:38,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:38:38,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374804334] [2021-12-06 17:38:38,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:38:38,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:38:38,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:38:38,253 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:38:38,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-06 17:38:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:38:38,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 17:38:38,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:38:38,433 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 [2021-12-06 17:38:38,484 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 17:38:38,484 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 [2021-12-06 17:38:38,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:38:38,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:38:38,493 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:38:38,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374804334] [2021-12-06 17:38:38,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374804334] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:38:38,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:38:38,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:38:38,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794272767] [2021-12-06 17:38:38,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:38:38,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:38:38,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:38:38,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:38:38,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:38:38,494 INFO L87 Difference]: Start difference. First operand 120 states and 155 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 17:38:38,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:38:38,647 INFO L93 Difference]: Finished difference Result 140 states and 174 transitions. [2021-12-06 17:38:38,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:38:38,648 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-12-06 17:38:38,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:38:38,648 INFO L225 Difference]: With dead ends: 140 [2021-12-06 17:38:38,649 INFO L226 Difference]: Without dead ends: 140 [2021-12-06 17:38:38,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:38:38,649 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 49 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:38:38,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 181 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 116 Invalid, 0 Unknown, 64 Unchecked, 0.1s Time] [2021-12-06 17:38:38,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-06 17:38:38,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 119. [2021-12-06 17:38:38,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 78 states have (on average 1.8076923076923077) internal successors, (141), 109 states have internal predecessors, (141), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-06 17:38:38,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 154 transitions. [2021-12-06 17:38:38,653 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 154 transitions. Word has length 27 [2021-12-06 17:38:38,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:38:38,654 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 154 transitions. [2021-12-06 17:38:38,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 17:38:38,654 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 154 transitions. [2021-12-06 17:38:38,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 17:38:38,655 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:38:38,655 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:38:38,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-06 17:38:38,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:38:38,856 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:38:38,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:38:38,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1675880116, now seen corresponding path program 1 times [2021-12-06 17:38:38,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:38:38,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1823292283] [2021-12-06 17:38:38,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:38:38,859 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:38:38,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:38:38,860 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:38:38,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-06 17:38:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:38:38,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 17:38:38,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:38:38,939 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 [2021-12-06 17:38:38,945 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 [2021-12-06 17:38:39,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:38:39,089 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 12 treesize of output 14 [2021-12-06 17:38:39,096 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:38:39,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 17:38:41,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:38:41,230 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 [2021-12-06 17:38:41,238 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:38:41,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 17:38:41,250 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:38:41,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:38:41,506 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:38:41,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1823292283] [2021-12-06 17:38:41,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1823292283] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:38:41,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1717476321] [2021-12-06 17:38:41,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:38:41,507 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:38:41,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:38:41,508 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:38:41,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-12-06 17:38:41,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:38:41,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 17:38:41,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:38:41,621 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 [2021-12-06 17:38:41,625 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 [2021-12-06 17:38:41,711 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:38:41,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-12-06 17:38:41,716 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 [2021-12-06 17:38:41,750 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 [2021-12-06 17:38:41,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-06 17:38:41,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:38:41,869 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 [2021-12-06 17:38:41,876 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:38:41,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-12-06 17:38:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:38:41,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:38:44,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1717476321] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:38:44,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:38:44,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 11 [2021-12-06 17:38:44,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221678840] [2021-12-06 17:38:44,109 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:38:44,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 17:38:44,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:38:44,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 17:38:44,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-06 17:38:44,110 INFO L87 Difference]: Start difference. First operand 119 states and 154 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 17:38:44,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:38:44,759 INFO L93 Difference]: Finished difference Result 165 states and 198 transitions. [2021-12-06 17:38:44,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:38:44,760 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-12-06 17:38:44,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:38:44,761 INFO L225 Difference]: With dead ends: 165 [2021-12-06 17:38:44,761 INFO L226 Difference]: Without dead ends: 165 [2021-12-06 17:38:44,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-12-06 17:38:44,762 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 68 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:38:44,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 368 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 509 Invalid, 0 Unknown, 62 Unchecked, 0.6s Time] [2021-12-06 17:38:44,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-06 17:38:44,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 109. [2021-12-06 17:38:44,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 70 states have (on average 1.7714285714285714) internal successors, (124), 100 states have internal predecessors, (124), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 17:38:44,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 134 transitions. [2021-12-06 17:38:44,765 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 134 transitions. Word has length 27 [2021-12-06 17:38:44,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:38:44,765 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 134 transitions. [2021-12-06 17:38:44,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 17:38:44,765 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 134 transitions. [2021-12-06 17:38:44,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 17:38:44,766 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:38:44,766 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:38:44,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-12-06 17:38:44,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-12-06 17:38:45,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:38:45,168 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:38:45,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:38:45,169 INFO L85 PathProgramCache]: Analyzing trace with hash -412676065, now seen corresponding path program 1 times [2021-12-06 17:38:45,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:38:45,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2019675608] [2021-12-06 17:38:45,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:38:45,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:38:45,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:38:45,172 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:38:45,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-06 17:38:45,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:38:45,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 17:38:45,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:38:45,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:38:45,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:38:45,355 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 [2021-12-06 17:38:45,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:38:45,450 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-06 17:38:45,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 31 [2021-12-06 17:38:45,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:38:45,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 58 [2021-12-06 17:38:45,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 17:38:45,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:38:45,685 INFO L354 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2021-12-06 17:38:45,685 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 76 treesize of output 75 [2021-12-06 17:38:45,743 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:38:45,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2019675608] [2021-12-06 17:38:45,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2019675608] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:38:45,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1245446438] [2021-12-06 17:38:45,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:38:45,743 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:38:45,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:38:45,744 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:38:45,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-12-06 17:38:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:38:45,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 17:38:45,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:38:45,854 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 [2021-12-06 17:38:45,949 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:38:45,949 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 [2021-12-06 17:38:45,976 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 [2021-12-06 17:38:48,044 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_16| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_9| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_16|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_9|) |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_16|))) is different from true [2021-12-06 17:38:48,129 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 17:38:48,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-12-06 17:38:48,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-12-06 17:38:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-12-06 17:38:48,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:38:48,221 INFO L354 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2021-12-06 17:38:48,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-12-06 17:38:48,227 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_264 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_264) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) is different from false [2021-12-06 17:38:48,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1245446438] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:38:48,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:38:48,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-12-06 17:38:48,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400317023] [2021-12-06 17:38:48,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:38:48,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 17:38:48,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:38:48,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 17:38:48,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=492, Unknown=2, NotChecked=90, Total=650 [2021-12-06 17:38:48,234 INFO L87 Difference]: Start difference. First operand 109 states and 134 transitions. Second operand has 22 states, 20 states have (on average 1.75) internal successors, (35), 17 states have internal predecessors, (35), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 17:38:57,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:38:57,153 INFO L93 Difference]: Finished difference Result 116 states and 142 transitions. [2021-12-06 17:38:57,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 17:38:57,153 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.75) internal successors, (35), 17 states have internal predecessors, (35), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2021-12-06 17:38:57,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:38:57,154 INFO L225 Difference]: With dead ends: 116 [2021-12-06 17:38:57,154 INFO L226 Difference]: Without dead ends: 116 [2021-12-06 17:38:57,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=211, Invalid=1353, Unknown=4, NotChecked=154, Total=1722 [2021-12-06 17:38:57,155 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 45 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:38:57,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 625 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 379 Invalid, 0 Unknown, 138 Unchecked, 0.4s Time] [2021-12-06 17:38:57,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-06 17:38:57,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2021-12-06 17:38:57,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 73 states have (on average 1.7397260273972603) internal successors, (127), 102 states have internal predecessors, (127), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 17:38:57,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 137 transitions. [2021-12-06 17:38:57,158 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 137 transitions. Word has length 28 [2021-12-06 17:38:57,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:38:57,158 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 137 transitions. [2021-12-06 17:38:57,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.75) internal successors, (35), 17 states have internal predecessors, (35), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 17:38:57,158 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 137 transitions. [2021-12-06 17:38:57,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 17:38:57,159 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:38:57,159 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:38:57,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-12-06 17:38:57,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-06 17:38:57,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:38:57,561 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:38:57,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:38:57,562 INFO L85 PathProgramCache]: Analyzing trace with hash -412676064, now seen corresponding path program 1 times [2021-12-06 17:38:57,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:38:57,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996281809] [2021-12-06 17:38:57,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:38:57,563 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:38:57,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:38:57,566 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:38:57,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-06 17:38:57,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:38:57,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 17:38:57,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:38:57,669 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 [2021-12-06 17:38:57,726 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:38:57,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-12-06 17:38:57,747 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 [2021-12-06 17:38:57,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:38:57,917 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 17:38:57,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2021-12-06 17:38:57,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-12-06 17:38:57,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-12-06 17:38:57,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-12-06 17:38:58,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:38:58,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:38:58,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:38:58,199 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 50 treesize of output 54 [2021-12-06 17:38:58,295 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_288 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_288) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse1 (bvadd (_ bv4 32) .cse1)))))) (and (or (forall ((v_ArrVal_289 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_289) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (and .cse0 (forall ((v_prenex_1 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_prenex_1) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (_ bv0 32))))) (forall ((v_prenex_1 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_prenex_1) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset|))) .cse0)) is different from false [2021-12-06 17:38:58,330 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:38:58,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996281809] [2021-12-06 17:38:58,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996281809] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:38:58,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [908174937] [2021-12-06 17:38:58,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:38:58,330 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:38:58,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:38:58,331 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:38:58,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-12-06 17:38:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:38:58,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 17:38:58,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:38:58,445 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 [2021-12-06 17:38:58,475 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:38:58,475 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 [2021-12-06 17:38:58,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:38:58,490 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 [2021-12-06 17:38:58,628 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 17:38:58,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2021-12-06 17:38:58,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-12-06 17:38:58,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-12-06 17:38:58,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-12-06 17:38:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:38:58,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:38:58,746 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:38:58,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 54 [2021-12-06 17:38:58,862 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_314 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_314) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_prenex_4 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_prenex_4) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset|))) (or (forall ((v_prenex_4 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 32) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_prenex_4) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))) (forall ((v_ArrVal_313 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_313) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))))) is different from false [2021-12-06 17:38:58,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [908174937] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:38:58,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:38:58,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-12-06 17:38:58,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565808016] [2021-12-06 17:38:58,893 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:38:58,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 17:38:58,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:38:58,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 17:38:58,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=178, Unknown=2, NotChecked=54, Total=272 [2021-12-06 17:38:58,894 INFO L87 Difference]: Start difference. First operand 112 states and 137 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 17:38:59,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:38:59,474 INFO L93 Difference]: Finished difference Result 130 states and 143 transitions. [2021-12-06 17:38:59,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 17:38:59,474 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-12-06 17:38:59,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:38:59,475 INFO L225 Difference]: With dead ends: 130 [2021-12-06 17:38:59,475 INFO L226 Difference]: Without dead ends: 130 [2021-12-06 17:38:59,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=422, Unknown=2, NotChecked=86, Total=600 [2021-12-06 17:38:59,476 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 82 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:38:59,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 366 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 346 Invalid, 0 Unknown, 48 Unchecked, 0.4s Time] [2021-12-06 17:38:59,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-06 17:38:59,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 111. [2021-12-06 17:38:59,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 73 states have (on average 1.726027397260274) internal successors, (126), 101 states have internal predecessors, (126), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 17:38:59,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 135 transitions. [2021-12-06 17:38:59,479 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 135 transitions. Word has length 28 [2021-12-06 17:38:59,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:38:59,479 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 135 transitions. [2021-12-06 17:38:59,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 17:38:59,479 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 135 transitions. [2021-12-06 17:38:59,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 17:38:59,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:38:59,480 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:38:59,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-12-06 17:38:59,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-12-06 17:38:59,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:38:59,881 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:38:59,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:38:59,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1444706688, now seen corresponding path program 1 times [2021-12-06 17:38:59,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:38:59,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [588920495] [2021-12-06 17:38:59,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:38:59,883 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:38:59,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:38:59,884 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:38:59,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-06 17:38:59,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:38:59,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:38:59,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:00,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 17:39:00,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:39:00,008 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:39:00,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [588920495] [2021-12-06 17:39:00,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [588920495] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:39:00,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:39:00,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:39:00,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956070447] [2021-12-06 17:39:00,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:39:00,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:39:00,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:39:00,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:39:00,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:39:00,010 INFO L87 Difference]: Start difference. First operand 111 states and 135 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 17:39:00,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:39:00,124 INFO L93 Difference]: Finished difference Result 110 states and 134 transitions. [2021-12-06 17:39:00,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:39:00,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2021-12-06 17:39:00,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:39:00,125 INFO L225 Difference]: With dead ends: 110 [2021-12-06 17:39:00,125 INFO L226 Difference]: Without dead ends: 110 [2021-12-06 17:39:00,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:39:00,126 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 30 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:39:00,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 127 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:39:00,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-06 17:39:00,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-12-06 17:39:00,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 73 states have (on average 1.7123287671232876) internal successors, (125), 100 states have internal predecessors, (125), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 17:39:00,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 134 transitions. [2021-12-06 17:39:00,128 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 134 transitions. Word has length 30 [2021-12-06 17:39:00,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:39:00,129 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 134 transitions. [2021-12-06 17:39:00,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 17:39:00,129 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 134 transitions. [2021-12-06 17:39:00,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 17:39:00,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:39:00,129 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:39:00,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-12-06 17:39:00,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:39:00,330 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:39:00,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:39:00,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1444706687, now seen corresponding path program 1 times [2021-12-06 17:39:00,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:39:00,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1321330026] [2021-12-06 17:39:00,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:00,333 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:39:00,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:39:00,335 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:39:00,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-06 17:39:00,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:00,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 17:39:00,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 17:39:00,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:39:00,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-06 17:39:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 17:39:00,764 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:39:00,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1321330026] [2021-12-06 17:39:00,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1321330026] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:39:00,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:39:00,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-12-06 17:39:00,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424743419] [2021-12-06 17:39:00,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:39:00,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 17:39:00,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:39:00,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 17:39:00,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-06 17:39:00,765 INFO L87 Difference]: Start difference. First operand 110 states and 134 transitions. Second operand has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 17:39:01,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:39:01,226 INFO L93 Difference]: Finished difference Result 107 states and 131 transitions. [2021-12-06 17:39:01,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:39:01,227 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2021-12-06 17:39:01,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:39:01,227 INFO L225 Difference]: With dead ends: 107 [2021-12-06 17:39:01,227 INFO L226 Difference]: Without dead ends: 107 [2021-12-06 17:39:01,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:39:01,228 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 62 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:39:01,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 410 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 17:39:01,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-06 17:39:01,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 98. [2021-12-06 17:39:01,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 64 states have (on average 1.625) internal successors, (104), 88 states have internal predecessors, (104), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 17:39:01,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 113 transitions. [2021-12-06 17:39:01,231 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 113 transitions. Word has length 30 [2021-12-06 17:39:01,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:39:01,231 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 113 transitions. [2021-12-06 17:39:01,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 17:39:01,231 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 113 transitions. [2021-12-06 17:39:01,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 17:39:01,231 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:39:01,232 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:39:01,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-12-06 17:39:01,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:39:01,433 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:39:01,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:39:01,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1836234894, now seen corresponding path program 1 times [2021-12-06 17:39:01,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:39:01,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1216862287] [2021-12-06 17:39:01,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:01,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:39:01,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:39:01,438 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:39:01,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-06 17:39:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:01,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 17:39:01,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:01,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:39:01,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:39:01,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 17:39:01,685 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-06 17:39:01,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 21 [2021-12-06 17:39:01,714 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 [2021-12-06 17:39:01,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:39:01,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:39:01,724 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:39:01,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1216862287] [2021-12-06 17:39:01,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1216862287] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:39:01,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:39:01,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-06 17:39:01,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163193792] [2021-12-06 17:39:01,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:39:01,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 17:39:01,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:39:01,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 17:39:01,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-06 17:39:01,725 INFO L87 Difference]: Start difference. First operand 98 states and 113 transitions. Second operand has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 17:39:01,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:39:01,950 INFO L93 Difference]: Finished difference Result 176 states and 205 transitions. [2021-12-06 17:39:01,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 17:39:01,951 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2021-12-06 17:39:01,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:39:01,952 INFO L225 Difference]: With dead ends: 176 [2021-12-06 17:39:01,952 INFO L226 Difference]: Without dead ends: 176 [2021-12-06 17:39:01,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:39:01,953 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 89 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:39:01,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 491 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 169 Invalid, 0 Unknown, 26 Unchecked, 0.2s Time] [2021-12-06 17:39:01,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-06 17:39:01,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 107. [2021-12-06 17:39:01,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 72 states have (on average 1.5694444444444444) internal successors, (113), 96 states have internal predecessors, (113), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 17:39:01,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 123 transitions. [2021-12-06 17:39:01,958 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 123 transitions. Word has length 31 [2021-12-06 17:39:01,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:39:01,958 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 123 transitions. [2021-12-06 17:39:01,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 17:39:01,958 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 123 transitions. [2021-12-06 17:39:01,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 17:39:01,959 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:39:01,959 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:39:01,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-12-06 17:39:02,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:39:02,160 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:39:02,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:39:02,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1836234347, now seen corresponding path program 1 times [2021-12-06 17:39:02,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:39:02,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901742474] [2021-12-06 17:39:02,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:02,163 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:39:02,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:39:02,165 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:39:02,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-06 17:39:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:02,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 17:39:02,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:02,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-12-06 17:39:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 17:39:02,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:39:02,348 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:39:02,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901742474] [2021-12-06 17:39:02,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901742474] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:39:02,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:39:02,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:39:02,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167033097] [2021-12-06 17:39:02,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:39:02,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:39:02,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:39:02,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:39:02,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:39:02,349 INFO L87 Difference]: Start difference. First operand 107 states and 123 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 17:39:02,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:39:02,571 INFO L93 Difference]: Finished difference Result 112 states and 128 transitions. [2021-12-06 17:39:02,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:39:02,572 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2021-12-06 17:39:02,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:39:02,573 INFO L225 Difference]: With dead ends: 112 [2021-12-06 17:39:02,573 INFO L226 Difference]: Without dead ends: 112 [2021-12-06 17:39:02,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:39:02,573 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 16 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:39:02,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 221 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:39:02,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-06 17:39:02,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2021-12-06 17:39:02,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 72 states have (on average 1.5555555555555556) internal successors, (112), 95 states have internal predecessors, (112), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 17:39:02,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2021-12-06 17:39:02,576 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 31 [2021-12-06 17:39:02,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:39:02,576 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2021-12-06 17:39:02,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 17:39:02,577 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2021-12-06 17:39:02,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 17:39:02,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:39:02,577 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:39:02,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-12-06 17:39:02,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:39:02,778 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:39:02,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:39:02,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1836234346, now seen corresponding path program 1 times [2021-12-06 17:39:02,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:39:02,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1754484744] [2021-12-06 17:39:02,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:02,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:39:02,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:39:02,783 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:39:02,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-06 17:39:02,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:02,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 17:39:02,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:03,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-12-06 17:39:03,104 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 [2021-12-06 17:39:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 17:39:03,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:39:03,150 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:39:03,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1754484744] [2021-12-06 17:39:03,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1754484744] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:39:03,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:39:03,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:39:03,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521464419] [2021-12-06 17:39:03,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:39:03,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:39:03,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:39:03,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:39:03,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:39:03,151 INFO L87 Difference]: Start difference. First operand 106 states and 122 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 17:39:03,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:39:03,801 INFO L93 Difference]: Finished difference Result 118 states and 133 transitions. [2021-12-06 17:39:03,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:39:03,802 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2021-12-06 17:39:03,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:39:03,802 INFO L225 Difference]: With dead ends: 118 [2021-12-06 17:39:03,802 INFO L226 Difference]: Without dead ends: 118 [2021-12-06 17:39:03,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:39:03,803 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 20 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:39:03,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 242 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 17:39:03,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-06 17:39:03,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 105. [2021-12-06 17:39:03,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 72 states have (on average 1.5416666666666667) internal successors, (111), 94 states have internal predecessors, (111), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 17:39:03,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2021-12-06 17:39:03,806 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 31 [2021-12-06 17:39:03,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:39:03,806 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2021-12-06 17:39:03,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 17:39:03,806 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2021-12-06 17:39:03,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 17:39:03,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:39:03,807 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:39:03,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-12-06 17:39:04,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:39:04,008 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:39:04,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:39:04,009 INFO L85 PathProgramCache]: Analyzing trace with hash -2032748399, now seen corresponding path program 1 times [2021-12-06 17:39:04,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:39:04,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [665872412] [2021-12-06 17:39:04,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:04,010 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:39:04,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:39:04,013 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:39:04,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-06 17:39:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:04,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 17:39:04,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:04,230 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 [2021-12-06 17:39:04,280 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:39:04,280 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 [2021-12-06 17:39:04,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:39:04,304 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 [2021-12-06 17:39:04,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-06 17:39:04,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 17:39:04,459 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 [2021-12-06 17:39:04,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:39:04,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:39:04,489 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_432 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_432) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) is different from false [2021-12-06 17:39:04,495 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:39:04,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [665872412] [2021-12-06 17:39:04,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [665872412] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:39:04,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1970094357] [2021-12-06 17:39:04,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:04,495 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:39:04,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:39:04,496 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:39:04,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-12-06 17:39:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:04,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 17:39:04,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:04,622 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 [2021-12-06 17:39:04,666 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 [2021-12-06 17:39:04,706 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:39:04,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-12-06 17:39:04,739 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 [2021-12-06 17:39:04,832 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 [2021-12-06 17:39:06,957 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 17:39:06,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2021-12-06 17:39:06,974 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 [2021-12-06 17:39:07,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-12-06 17:39:07,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:39:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:39:07,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:39:07,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-12-06 17:39:07,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1970094357] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:39:07,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:39:07,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 19 [2021-12-06 17:39:07,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171396613] [2021-12-06 17:39:07,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:39:07,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 17:39:07,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:39:07,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 17:39:07,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=4, NotChecked=42, Total=552 [2021-12-06 17:39:07,481 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 17 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 17:39:12,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:39:12,933 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2021-12-06 17:39:12,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 17:39:12,934 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 17 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 31 [2021-12-06 17:39:12,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:39:12,935 INFO L225 Difference]: With dead ends: 142 [2021-12-06 17:39:12,935 INFO L226 Difference]: Without dead ends: 142 [2021-12-06 17:39:12,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=200, Invalid=1206, Unknown=4, NotChecked=72, Total=1482 [2021-12-06 17:39:12,936 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 129 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:39:12,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 568 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 898 Invalid, 0 Unknown, 109 Unchecked, 0.9s Time] [2021-12-06 17:39:12,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-06 17:39:12,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 97. [2021-12-06 17:39:12,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 65 states have (on average 1.5846153846153845) internal successors, (103), 87 states have internal predecessors, (103), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 17:39:12,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 112 transitions. [2021-12-06 17:39:12,940 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 112 transitions. Word has length 31 [2021-12-06 17:39:12,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:39:12,940 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 112 transitions. [2021-12-06 17:39:12,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 17 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 17:39:12,941 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 112 transitions. [2021-12-06 17:39:12,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 17:39:12,941 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:39:12,941 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] [2021-12-06 17:39:12,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-12-06 17:39:13,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2021-12-06 17:39:13,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:39:13,343 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:39:13,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:39:13,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1088706739, now seen corresponding path program 1 times [2021-12-06 17:39:13,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:39:13,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172777484] [2021-12-06 17:39:13,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:13,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:39:13,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:39:13,348 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:39:13,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-06 17:39:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:13,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 17:39:13,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:13,440 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 [2021-12-06 17:39:13,490 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:39:13,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-12-06 17:39:13,506 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 [2021-12-06 17:39:15,566 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_27| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_20| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_27|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_20|) |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_27|))) is different from true [2021-12-06 17:39:17,693 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-06 17:39:17,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2021-12-06 17:39:17,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2021-12-06 17:39:17,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-12-06 17:39:17,780 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 17:39:17,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2021-12-06 17:39:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-06 17:39:17,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:39:17,863 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_476 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base|) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset| |c_ULTIMATE.start_entry_point_#t~ret48#1.base|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_476) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (_ bv0 32)))) is different from false [2021-12-06 17:39:17,893 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_476 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ldv_malloc_#res.base_83| (_ BitVec 32))) (or (= |v_ldv_malloc_#res.base_83| (_ bv0 32)) (not (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base|) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset| |v_ldv_malloc_#res.base_83|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_476) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (_ bv0 32))))) is different from false [2021-12-06 17:39:17,896 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:39:17,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172777484] [2021-12-06 17:39:17,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172777484] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:39:17,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1496064378] [2021-12-06 17:39:17,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:17,896 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:39:17,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:39:17,897 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:39:17,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-12-06 17:39:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:18,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 17:39:18,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:18,025 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 [2021-12-06 17:39:18,102 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:39:18,102 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 [2021-12-06 17:39:18,148 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 [2021-12-06 17:39:18,444 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 17:39:18,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-12-06 17:39:18,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-12-06 17:39:18,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:39:18,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:39:20,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1496064378] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:39:20,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:39:20,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2021-12-06 17:39:20,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491933465] [2021-12-06 17:39:20,717 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:39:20,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 17:39:20,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:39:20,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 17:39:20,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=523, Unknown=20, NotChecked=144, Total=756 [2021-12-06 17:39:20,718 INFO L87 Difference]: Start difference. First operand 97 states and 112 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 18 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 17:39:21,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:39:21,870 INFO L93 Difference]: Finished difference Result 114 states and 128 transitions. [2021-12-06 17:39:21,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 17:39:21,870 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 18 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 32 [2021-12-06 17:39:21,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:39:21,871 INFO L225 Difference]: With dead ends: 114 [2021-12-06 17:39:21,871 INFO L226 Difference]: Without dead ends: 114 [2021-12-06 17:39:21,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=180, Invalid=1211, Unknown=27, NotChecked=222, Total=1640 [2021-12-06 17:39:21,872 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 60 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:39:21,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 570 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 459 Invalid, 0 Unknown, 195 Unchecked, 0.6s Time] [2021-12-06 17:39:21,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-06 17:39:21,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 105. [2021-12-06 17:39:21,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 72 states have (on average 1.5277777777777777) internal successors, (110), 94 states have internal predecessors, (110), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 17:39:21,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions. [2021-12-06 17:39:21,875 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 32 [2021-12-06 17:39:21,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:39:21,875 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 120 transitions. [2021-12-06 17:39:21,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 18 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 17:39:21,875 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions. [2021-12-06 17:39:21,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 17:39:21,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:39:21,875 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:39:21,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2021-12-06 17:39:22,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-12-06 17:39:22,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:39:22,277 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:39:22,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:39:22,278 INFO L85 PathProgramCache]: Analyzing trace with hash 738912307, now seen corresponding path program 1 times [2021-12-06 17:39:22,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:39:22,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [27122961] [2021-12-06 17:39:22,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:22,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:39:22,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:39:22,280 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:39:22,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-06 17:39:22,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:22,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:39:22,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:22,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-12-06 17:39:22,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 17:39:22,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:39:22,403 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:39:22,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [27122961] [2021-12-06 17:39:22,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [27122961] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:39:22,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:39:22,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:39:22,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243176815] [2021-12-06 17:39:22,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:39:22,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:39:22,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:39:22,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:39:22,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:39:22,404 INFO L87 Difference]: Start difference. First operand 105 states and 120 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 17:39:22,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:39:22,569 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2021-12-06 17:39:22,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:39:22,569 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2021-12-06 17:39:22,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:39:22,570 INFO L225 Difference]: With dead ends: 106 [2021-12-06 17:39:22,570 INFO L226 Difference]: Without dead ends: 106 [2021-12-06 17:39:22,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:39:22,570 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 6 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:39:22,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 182 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:39:22,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-06 17:39:22,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-12-06 17:39:22,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 73 states have (on average 1.5205479452054795) internal successors, (111), 95 states have internal predecessors, (111), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 17:39:22,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 121 transitions. [2021-12-06 17:39:22,573 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 121 transitions. Word has length 33 [2021-12-06 17:39:22,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:39:22,573 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 121 transitions. [2021-12-06 17:39:22,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 17:39:22,573 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 121 transitions. [2021-12-06 17:39:22,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 17:39:22,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:39:22,574 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:39:22,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-12-06 17:39:22,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:39:22,774 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:39:22,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:39:22,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1143014625, now seen corresponding path program 1 times [2021-12-06 17:39:22,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:39:22,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194361043] [2021-12-06 17:39:22,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:22,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:39:22,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:39:22,777 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:39:22,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-12-06 17:39:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:23,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 17:39:23,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:23,014 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 [2021-12-06 17:39:23,057 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:39:23,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-12-06 17:39:23,070 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 [2021-12-06 17:39:25,122 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_31| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_22| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_31|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_22|) |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_31|))) is different from true [2021-12-06 17:39:25,132 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 [2021-12-06 17:39:29,266 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-06 17:39:29,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2021-12-06 17:39:29,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2021-12-06 17:39:29,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-12-06 17:39:29,421 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 17:39:29,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2021-12-06 17:39:31,538 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 17:39:31,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-12-06 17:39:31,589 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2021-12-06 17:39:31,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:39:34,124 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 119 treesize of output 86 [2021-12-06 17:39:34,137 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_542 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ldv_malloc_#res.base_93| (_ BitVec 32))) (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base|) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset| |v_ldv_malloc_#res.base_93|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_542) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) |v_ldv_malloc_#res.base_93|)) is different from false [2021-12-06 17:39:34,139 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:39:34,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194361043] [2021-12-06 17:39:34,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [194361043] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:39:34,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1263988790] [2021-12-06 17:39:34,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:34,140 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:39:34,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:39:34,140 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:39:34,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-12-06 17:39:34,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:34,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 17:39:34,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:34,323 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 [2021-12-06 17:39:36,470 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:39:36,470 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 [2021-12-06 17:39:36,515 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 [2021-12-06 17:39:36,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:39:38,645 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_33| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_33| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_33|) (_ bv0 32))))) is different from true [2021-12-06 17:39:38,654 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 [2021-12-06 17:39:46,854 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-06 17:39:46,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2021-12-06 17:39:46,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-12-06 17:39:47,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-12-06 17:39:49,153 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 17:39:49,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-12-06 17:39:51,293 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:39:51,293 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 [2021-12-06 17:39:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2021-12-06 17:39:51,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:39:51,616 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_574 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base|) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset| |c_ULTIMATE.start_entry_point_#t~ret48#1.base|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_574) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))))))))))))) (_ bv1 1)))) is different from false [2021-12-06 17:39:51,636 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 122 treesize of output 89 [2021-12-06 17:39:51,647 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_574 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ldv_malloc_#res.base_100| (_ BitVec 32))) (= |v_ldv_malloc_#res.base_100| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base|) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset| |v_ldv_malloc_#res.base_100|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_574) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))) is different from false [2021-12-06 17:39:51,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1263988790] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:39:51,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:39:51,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2021-12-06 17:39:51,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171944089] [2021-12-06 17:39:51,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:39:51,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 17:39:51,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:39:51,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 17:39:51,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1009, Unknown=22, NotChecked=340, Total=1482 [2021-12-06 17:39:51,651 INFO L87 Difference]: Start difference. First operand 106 states and 121 transitions. Second operand has 31 states, 28 states have (on average 1.75) internal successors, (49), 25 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-06 17:40:10,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:40:10,839 INFO L93 Difference]: Finished difference Result 119 states and 136 transitions. [2021-12-06 17:40:10,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 17:40:10,840 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.75) internal successors, (49), 25 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 37 [2021-12-06 17:40:10,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:40:10,841 INFO L225 Difference]: With dead ends: 119 [2021-12-06 17:40:10,841 INFO L226 Difference]: Without dead ends: 119 [2021-12-06 17:40:10,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 54 SyntacticMatches, 10 SemanticMatches, 47 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 46.2s TimeCoverageRelationStatistics Valid=212, Invalid=1674, Unknown=26, NotChecked=440, Total=2352 [2021-12-06 17:40:10,842 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 76 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 397 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:40:10,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 701 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 655 Invalid, 0 Unknown, 397 Unchecked, 0.7s Time] [2021-12-06 17:40:10,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-06 17:40:10,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2021-12-06 17:40:10,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 77 states have (on average 1.5194805194805194) internal successors, (117), 98 states have internal predecessors, (117), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-06 17:40:10,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2021-12-06 17:40:10,845 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 37 [2021-12-06 17:40:10,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:40:10,845 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2021-12-06 17:40:10,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.75) internal successors, (49), 25 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-06 17:40:10,845 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2021-12-06 17:40:10,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 17:40:10,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:40:10,846 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:40:10,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2021-12-06 17:40:11,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-12-06 17:40:11,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:40:11,247 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:40:11,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:40:11,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1143014624, now seen corresponding path program 1 times [2021-12-06 17:40:11,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:40:11,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [804262746] [2021-12-06 17:40:11,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:40:11,250 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:40:11,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:40:11,252 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:40:11,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-12-06 17:40:11,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:40:11,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 17:40:11,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:40:11,412 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 [2021-12-06 17:40:11,457 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:40:11,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 17:40:11,472 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 [2021-12-06 17:40:13,523 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_25| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_35| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_35| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_35|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_25|)))) is different from true [2021-12-06 17:40:15,558 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 [2021-12-06 17:40:17,698 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-06 17:40:17,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2021-12-06 17:40:17,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2021-12-06 17:40:17,902 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-06 17:40:17,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 38 [2021-12-06 17:40:17,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2021-12-06 17:40:24,122 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 17:40:24,122 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 [2021-12-06 17:40:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 15 refuted. 1 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-06 17:40:24,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:40:24,549 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:40:24,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [804262746] [2021-12-06 17:40:24,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [804262746] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:40:24,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1182623506] [2021-12-06 17:40:24,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:40:24,549 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:40:24,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:40:24,550 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:40:24,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-12-06 17:40:24,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:40:24,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-06 17:40:24,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:40:24,729 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 [2021-12-06 17:40:24,928 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:40:24,929 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 [2021-12-06 17:40:24,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:40:24,992 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 [2021-12-06 17:40:27,333 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 [2021-12-06 17:40:27,337 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 [2021-12-06 17:40:27,638 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 17:40:27,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2021-12-06 17:40:27,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 55 [2021-12-06 17:40:28,031 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-12-06 17:40:28,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 46 [2021-12-06 17:40:28,041 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 17:40:28,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-12-06 17:40:32,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:40:32,393 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 [2021-12-06 17:40:32,399 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:40:32,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 17:40:32,404 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:40:32,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:40:36,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1182623506] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:40:36,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:40:36,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2021-12-06 17:40:36,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369506686] [2021-12-06 17:40:36,731 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:40:36,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-06 17:40:36,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:40:36,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-06 17:40:36,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1431, Unknown=9, NotChecked=76, Total=1640 [2021-12-06 17:40:36,732 INFO L87 Difference]: Start difference. First operand 111 states and 130 transitions. Second operand has 38 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 29 states have internal predecessors, (53), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 17:40:44,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:40:44,191 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2021-12-06 17:40:44,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 17:40:44,191 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 29 states have internal predecessors, (53), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 37 [2021-12-06 17:40:44,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:40:44,192 INFO L225 Difference]: With dead ends: 113 [2021-12-06 17:40:44,192 INFO L226 Difference]: Without dead ends: 113 [2021-12-06 17:40:44,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 31.2s TimeCoverageRelationStatistics Valid=244, Invalid=2400, Unknown=12, NotChecked=100, Total=2756 [2021-12-06 17:40:44,193 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 59 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:40:44,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 943 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 671 Invalid, 0 Unknown, 352 Unchecked, 0.7s Time] [2021-12-06 17:40:44,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-06 17:40:44,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2021-12-06 17:40:44,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 77 states have (on average 1.4935064935064934) internal successors, (115), 98 states have internal predecessors, (115), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-06 17:40:44,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 128 transitions. [2021-12-06 17:40:44,196 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 128 transitions. Word has length 37 [2021-12-06 17:40:44,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:40:44,196 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 128 transitions. [2021-12-06 17:40:44,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 29 states have internal predecessors, (53), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 17:40:44,197 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 128 transitions. [2021-12-06 17:40:44,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 17:40:44,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:40:44,197 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:40:44,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-12-06 17:40:44,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-12-06 17:40:44,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:40:44,599 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:40:44,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:40:44,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1229276979, now seen corresponding path program 1 times [2021-12-06 17:40:44,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:40:44,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175309906] [2021-12-06 17:40:44,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:40:44,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:40:44,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:40:44,603 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:40:44,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-12-06 17:40:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:40:44,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 17:40:44,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:40:44,729 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 [2021-12-06 17:40:44,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2021-12-06 17:40:45,034 INFO L354 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2021-12-06 17:40:45,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 32 [2021-12-06 17:40:45,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-12-06 17:40:45,134 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-12-06 17:40:45,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 45 [2021-12-06 17:40:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:40:45,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:40:45,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:40:45,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 48 [2021-12-06 17:40:45,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-12-06 17:40:45,650 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:40:45,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1175309906] [2021-12-06 17:40:45,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1175309906] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:40:45,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1439615538] [2021-12-06 17:40:45,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:40:45,651 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:40:45,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:40:45,652 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:40:45,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-12-06 17:40:45,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:40:45,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 17:40:45,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:40:45,789 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 [2021-12-06 17:40:45,890 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:40:45,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 17:40:45,926 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 [2021-12-06 17:40:46,019 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 [2021-12-06 17:40:50,155 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 17:40:50,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2021-12-06 17:40:50,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-06 17:40:50,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 17:40:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:40:50,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:40:50,325 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |c_ULTIMATE.start_entry_point_~a10~0#1.base|))) (_ bv1 1))) (forall ((v_ArrVal_685 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= |c_ULTIMATE.start_entry_point_~a10~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_685) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))))) is different from false [2021-12-06 17:40:50,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1439615538] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:40:50,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:40:50,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-12-06 17:40:50,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358461105] [2021-12-06 17:40:50,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:40:50,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 17:40:50,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:40:50,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 17:40:50,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=805, Unknown=2, NotChecked=58, Total=992 [2021-12-06 17:40:50,339 INFO L87 Difference]: Start difference. First operand 111 states and 128 transitions. Second operand has 25 states, 24 states have (on average 2.375) internal successors, (57), 22 states have internal predecessors, (57), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 17:40:57,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:40:57,779 INFO L93 Difference]: Finished difference Result 180 states and 203 transitions. [2021-12-06 17:40:57,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 17:40:57,780 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 22 states have internal predecessors, (57), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2021-12-06 17:40:57,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:40:57,781 INFO L225 Difference]: With dead ends: 180 [2021-12-06 17:40:57,781 INFO L226 Difference]: Without dead ends: 180 [2021-12-06 17:40:57,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=297, Invalid=1773, Unknown=4, NotChecked=88, Total=2162 [2021-12-06 17:40:57,782 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 151 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:40:57,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 764 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1014 Invalid, 0 Unknown, 90 Unchecked, 1.0s Time] [2021-12-06 17:40:57,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-06 17:40:57,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 122. [2021-12-06 17:40:57,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 85 states have (on average 1.4588235294117646) internal successors, (124), 108 states have internal predecessors, (124), 5 states have call successors, (5), 5 states have call predecessors, (5), 8 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-06 17:40:57,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 137 transitions. [2021-12-06 17:40:57,785 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 137 transitions. Word has length 36 [2021-12-06 17:40:57,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:40:57,785 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 137 transitions. [2021-12-06 17:40:57,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 22 states have internal predecessors, (57), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 17:40:57,785 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 137 transitions. [2021-12-06 17:40:57,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 17:40:57,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:40:57,785 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] [2021-12-06 17:40:57,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-12-06 17:40:57,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2021-12-06 17:40:58,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:40:58,187 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:40:58,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:40:58,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1653548802, now seen corresponding path program 1 times [2021-12-06 17:40:58,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:40:58,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915729754] [2021-12-06 17:40:58,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:40:58,189 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:40:58,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:40:58,191 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:40:58,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-12-06 17:40:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:40:58,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 17:40:58,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:40:58,302 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 [2021-12-06 17:40:58,348 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:40:58,348 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 [2021-12-06 17:40:58,363 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 [2021-12-06 17:40:58,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:41:00,416 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_42| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_31| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_42| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_42|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_31|)))) is different from true [2021-12-06 17:41:02,544 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-06 17:41:02,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2021-12-06 17:41:02,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2021-12-06 17:41:02,667 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-06 17:41:02,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2021-12-06 17:41:02,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2021-12-06 17:41:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-06 17:41:02,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:41:10,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:41:10,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2412 treesize of output 2170 [2021-12-06 17:41:10,196 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-12-06 17:41:10,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 666 treesize of output 516 [2021-12-06 17:41:10,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:41:10,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 360 treesize of output 360 [2021-12-06 17:41:10,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:41:10,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 393 treesize of output 345 [2021-12-06 17:41:10,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:41:10,581 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:41:10,581 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:41:10,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1915729754] [2021-12-06 17:41:10,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1915729754] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:41:10,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:41:10,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-12-06 17:41:10,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666130049] [2021-12-06 17:41:10,582 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:41:10,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 17:41:10,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:41:10,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 17:41:10,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=404, Unknown=2, NotChecked=40, Total=506 [2021-12-06 17:41:10,583 INFO L87 Difference]: Start difference. First operand 122 states and 137 transitions. Second operand has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 5 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 17:41:11,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:41:11,762 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2021-12-06 17:41:11,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 17:41:11,763 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 5 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 37 [2021-12-06 17:41:11,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:41:11,764 INFO L225 Difference]: With dead ends: 112 [2021-12-06 17:41:11,764 INFO L226 Difference]: Without dead ends: 112 [2021-12-06 17:41:11,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=123, Invalid=749, Unknown=2, NotChecked=56, Total=930 [2021-12-06 17:41:11,765 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 50 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 275 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:41:11,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 652 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 430 Invalid, 0 Unknown, 275 Unchecked, 0.8s Time] [2021-12-06 17:41:11,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-06 17:41:11,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2021-12-06 17:41:11,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 77 states have (on average 1.4285714285714286) internal successors, (110), 98 states have internal predecessors, (110), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 17:41:11,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2021-12-06 17:41:11,767 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 37 [2021-12-06 17:41:11,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:41:11,767 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2021-12-06 17:41:11,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 5 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 17:41:11,768 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2021-12-06 17:41:11,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-06 17:41:11,768 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:41:11,768 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:41:11,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2021-12-06 17:41:11,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:41:11,968 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:41:11,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:41:11,969 INFO L85 PathProgramCache]: Analyzing trace with hash 219174838, now seen corresponding path program 1 times [2021-12-06 17:41:11,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:41:11,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335731842] [2021-12-06 17:41:11,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:41:11,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:41:11,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:41:11,970 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:41:11,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-12-06 17:41:12,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:41:12,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 17:41:12,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:41:12,327 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 [2021-12-06 17:41:12,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:41:12,521 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 [2021-12-06 17:41:12,611 INFO L354 Elim1Store]: treesize reduction 6, result has 50.0 percent of original size [2021-12-06 17:41:12,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 61 [2021-12-06 17:41:12,881 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-06 17:41:12,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 49 [2021-12-06 17:41:13,346 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:41:13,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 51 [2021-12-06 17:41:33,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:41:33,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:41:33,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2021-12-06 17:41:47,938 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:41:47,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335731842] [2021-12-06 17:41:47,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335731842] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:41:47,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1698326844] [2021-12-06 17:41:47,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:41:47,939 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:41:47,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:41:47,939 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:41:47,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-12-06 17:41:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:41:48,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 17:41:48,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:41:48,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:41:48,916 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-12-06 17:41:48,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 58 [2021-12-06 17:41:59,220 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 17:41:59,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 45 [2021-12-06 17:41:59,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-12-06 17:42:06,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:42:06,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:42:06,102 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_768 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store (store |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_768) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) (_ bv0 1)) |c_ULTIMATE.start_entry_point_~a10~0#1.base| (_ bv0 1)) |c_ULTIMATE.start_main_old_#valid#1|)) is different from false [2021-12-06 17:42:06,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1698326844] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:42:06,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:42:06,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 29 [2021-12-06 17:42:06,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912052046] [2021-12-06 17:42:06,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:42:06,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 17:42:06,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:42:06,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 17:42:06,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1698, Unknown=20, NotChecked=84, Total=1980 [2021-12-06 17:42:06,118 INFO L87 Difference]: Start difference. First operand 109 states and 120 transitions. Second operand has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 25 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 17:42:20,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:42:20,114 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2021-12-06 17:42:20,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 17:42:20,114 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 25 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 38 [2021-12-06 17:42:20,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:42:20,115 INFO L225 Difference]: With dead ends: 111 [2021-12-06 17:42:20,115 INFO L226 Difference]: Without dead ends: 95 [2021-12-06 17:42:20,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 65.2s TimeCoverageRelationStatistics Valid=328, Invalid=3313, Unknown=23, NotChecked=118, Total=3782 [2021-12-06 17:42:20,117 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 18 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 328 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:42:20,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 507 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 328 Unchecked, 0.1s Time] [2021-12-06 17:42:20,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-06 17:42:20,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-12-06 17:42:20,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 64 states have (on average 1.5) internal successors, (96), 85 states have internal predecessors, (96), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 17:42:20,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2021-12-06 17:42:20,119 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 38 [2021-12-06 17:42:20,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:42:20,119 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2021-12-06 17:42:20,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 25 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 17:42:20,119 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2021-12-06 17:42:20,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 17:42:20,119 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:42:20,119 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:42:20,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-12-06 17:42:20,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2021-12-06 17:42:20,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:42:20,521 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:42:20,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:42:20,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1047942818, now seen corresponding path program 1 times [2021-12-06 17:42:20,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:42:20,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1640973627] [2021-12-06 17:42:20,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:42:20,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:42:20,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:42:20,525 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:42:20,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-12-06 17:42:20,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:42:20,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 17:42:20,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:42:20,660 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 [2021-12-06 17:42:20,735 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 17:42:20,735 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 [2021-12-06 17:42:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 17:42:20,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:42:20,765 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:42:20,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1640973627] [2021-12-06 17:42:20,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1640973627] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:42:20,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:42:20,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:42:20,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539190581] [2021-12-06 17:42:20,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:42:20,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:42:20,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:42:20,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:42:20,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:42:20,767 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 17:42:20,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:42:20,949 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2021-12-06 17:42:20,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:42:20,949 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2021-12-06 17:42:20,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:42:20,950 INFO L225 Difference]: With dead ends: 94 [2021-12-06 17:42:20,950 INFO L226 Difference]: Without dead ends: 94 [2021-12-06 17:42:20,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:42:20,951 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 46 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:42:20,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 140 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 108 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2021-12-06 17:42:20,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-06 17:42:20,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-12-06 17:42:20,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 64 states have (on average 1.46875) internal successors, (94), 84 states have internal predecessors, (94), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 17:42:20,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2021-12-06 17:42:20,954 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 40 [2021-12-06 17:42:20,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:42:20,954 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2021-12-06 17:42:20,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 17:42:20,955 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2021-12-06 17:42:20,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 17:42:20,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:42:20,955 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:42:20,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2021-12-06 17:42:21,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:42:21,156 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:42:21,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:42:21,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1047942817, now seen corresponding path program 1 times [2021-12-06 17:42:21,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:42:21,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682262313] [2021-12-06 17:42:21,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:42:21,160 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:42:21,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:42:21,161 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:42:21,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-12-06 17:42:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:42:21,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 17:42:21,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:42:21,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:42:21,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-12-06 17:42:21,521 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:42:21,522 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 [2021-12-06 17:42:21,594 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 17:42:21,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:42:21,918 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:42:21,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682262313] [2021-12-06 17:42:21,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682262313] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:42:21,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1320720002] [2021-12-06 17:42:21,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:42:21,918 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:42:21,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:42:21,919 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:42:21,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-12-06 17:42:22,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:42:22,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 17:42:22,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:42:22,175 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 [2021-12-06 17:42:22,181 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 [2021-12-06 17:42:22,390 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:42:22,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-12-06 17:42:22,396 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 [2021-12-06 17:42:22,445 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 [2021-12-06 17:42:22,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-06 17:42:22,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:42:22,652 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 [2021-12-06 17:42:22,661 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:42:22,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-12-06 17:42:24,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:42:24,873 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 [2021-12-06 17:42:24,881 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:42:24,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-12-06 17:42:24,942 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 17:42:24,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:42:25,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1320720002] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:42:25,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:42:25,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 18 [2021-12-06 17:42:25,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867487786] [2021-12-06 17:42:25,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:42:25,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 17:42:25,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:42:25,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 17:42:25,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-12-06 17:42:25,231 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 16 states have internal predecessors, (51), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 17:42:28,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:42:28,065 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2021-12-06 17:42:28,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 17:42:28,066 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 16 states have internal predecessors, (51), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) Word has length 40 [2021-12-06 17:42:28,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:42:28,066 INFO L225 Difference]: With dead ends: 99 [2021-12-06 17:42:28,066 INFO L226 Difference]: Without dead ends: 99 [2021-12-06 17:42:28,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=131, Invalid=680, Unknown=1, NotChecked=0, Total=812 [2021-12-06 17:42:28,067 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 202 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:42:28,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 339 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 503 Invalid, 0 Unknown, 50 Unchecked, 0.6s Time] [2021-12-06 17:42:28,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-06 17:42:28,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 79. [2021-12-06 17:42:28,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 70 states have internal predecessors, (71), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 17:42:28,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-12-06 17:42:28,069 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 40 [2021-12-06 17:42:28,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:42:28,069 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-12-06 17:42:28,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 16 states have internal predecessors, (51), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 17:42:28,069 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-12-06 17:42:28,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 17:42:28,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:42:28,070 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:42:28,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-12-06 17:42:28,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2021-12-06 17:42:28,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:42:28,471 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:42:28,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:42:28,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1873511044, now seen corresponding path program 1 times [2021-12-06 17:42:28,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:42:28,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556145586] [2021-12-06 17:42:28,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:42:28,474 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:42:28,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:42:28,476 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:42:28,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-12-06 17:42:28,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:42:28,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 17:42:28,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:42:28,708 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 [2021-12-06 17:42:28,767 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:42:28,767 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 [2021-12-06 17:42:28,789 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 [2021-12-06 17:42:28,876 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 10 treesize of output 8 [2021-12-06 17:42:35,002 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:42:35,002 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 [2021-12-06 17:42:35,103 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-06 17:42:35,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 42 [2021-12-06 17:42:35,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2021-12-06 17:42:35,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-12-06 17:42:35,505 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 [2021-12-06 17:42:45,781 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-12-06 17:42:45,781 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 43 treesize of output 64 [2021-12-06 17:42:45,937 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-12-06 17:42:45,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 57 [2021-12-06 17:42:45,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 17:42:46,101 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 35 treesize of output 23 [2021-12-06 17:42:46,185 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:42:46,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:42:46,465 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ldv_malloc_#res.base_146| (_ BitVec 32)) (v_ArrVal_902 (_ BitVec 1)) (v_ArrVal_899 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ldv_malloc_#res.base_146| v_ArrVal_902) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_899) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))))))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_146|)))))) is different from false [2021-12-06 17:42:46,468 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:42:46,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556145586] [2021-12-06 17:42:46,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556145586] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:42:46,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2049651240] [2021-12-06 17:42:46,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:42:46,468 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:42:46,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:42:46,469 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:42:46,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-12-06 17:42:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:42:46,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-06 17:42:46,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:42:46,690 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 [2021-12-06 17:42:46,916 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:42:46,916 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 25 treesize of output 25 [2021-12-06 17:42:46,983 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 [2021-12-06 17:42:46,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:42:47,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-12-06 17:42:51,437 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:42:51,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 17:42:51,601 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 17:42:51,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 42 [2021-12-06 17:42:51,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2021-12-06 17:42:51,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-12-06 17:42:52,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-12-06 17:43:08,609 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-06 17:43:08,609 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 44 [2021-12-06 17:43:08,778 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-12-06 17:43:08,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 50 [2021-12-06 17:43:08,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 17:43:08,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-12-06 17:43:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:08,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:43:09,001 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_938 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_938) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))))))))))) (_ bv1 1)))) is different from false [2021-12-06 17:43:09,042 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_938 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ldv_malloc_#res.base_149| (_ BitVec 32)) (v_ArrVal_941 (_ BitVec 1))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ldv_malloc_#res.base_149| v_ArrVal_941) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_938) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))))))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_149|)))))) is different from false [2021-12-06 17:43:09,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2049651240] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:09,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:43:09,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2021-12-06 17:43:09,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071081987] [2021-12-06 17:43:09,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:43:09,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 17:43:09,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:43:09,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 17:43:09,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1730, Unknown=18, NotChecked=258, Total=2162 [2021-12-06 17:43:09,046 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 41 states, 38 states have (on average 1.631578947368421) internal successors, (62), 35 states have internal predecessors, (62), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 17:43:28,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:28,475 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2021-12-06 17:43:28,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 17:43:28,476 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.631578947368421) internal successors, (62), 35 states have internal predecessors, (62), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 41 [2021-12-06 17:43:28,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:28,476 INFO L225 Difference]: With dead ends: 86 [2021-12-06 17:43:28,476 INFO L226 Difference]: Without dead ends: 86 [2021-12-06 17:43:28,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 57.7s TimeCoverageRelationStatistics Valid=273, Invalid=2796, Unknown=23, NotChecked=330, Total=3422 [2021-12-06 17:43:28,478 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 28 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:28,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 895 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 485 Invalid, 0 Unknown, 194 Unchecked, 0.6s Time] [2021-12-06 17:43:28,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-06 17:43:28,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-12-06 17:43:28,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 76 states have internal predecessors, (78), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 17:43:28,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2021-12-06 17:43:28,480 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 41 [2021-12-06 17:43:28,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:28,480 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2021-12-06 17:43:28,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.631578947368421) internal successors, (62), 35 states have internal predecessors, (62), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 17:43:28,480 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2021-12-06 17:43:28,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 17:43:28,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:28,480 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:28,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-12-06 17:43:28,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2021-12-06 17:43:28,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:43:28,882 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:43:28,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:28,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1873511045, now seen corresponding path program 1 times [2021-12-06 17:43:28,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:43:28,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1004857159] [2021-12-06 17:43:28,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:28,885 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:43:28,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:43:28,886 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:43:28,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-12-06 17:43:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:29,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-06 17:43:29,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:29,078 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 [2021-12-06 17:43:29,146 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:43:29,147 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 [2021-12-06 17:43:29,175 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 [2021-12-06 17:43:29,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:43:29,288 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 [2021-12-06 17:43:29,412 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:43:29,412 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 [2021-12-06 17:43:29,525 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-06 17:43:29,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 42 [2021-12-06 17:43:29,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2021-12-06 17:43:30,060 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 [2021-12-06 17:43:30,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-12-06 17:43:34,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:34,473 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 [2021-12-06 17:43:34,486 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-06 17:43:34,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2021-12-06 17:43:34,662 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-12-06 17:43:34,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 75 [2021-12-06 17:43:34,682 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 17:43:34,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 65 [2021-12-06 17:43:34,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-12-06 17:43:34,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-12-06 17:43:34,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-12-06 17:43:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:34,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:43:35,448 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_978 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_977 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_978) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_977) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))) (forall ((v_ArrVal_978 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_978) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0))))) is different from false [2021-12-06 17:43:36,262 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:43:36,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1004857159] [2021-12-06 17:43:36,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1004857159] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:36,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1930281767] [2021-12-06 17:43:36,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:36,263 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:43:36,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:43:36,263 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:43:36,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2021-12-06 17:43:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:36,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-06 17:43:36,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:36,512 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 [2021-12-06 17:43:36,839 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 [2021-12-06 17:43:39,007 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:43:39,007 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 [2021-12-06 17:43:39,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:43:39,175 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 [2021-12-06 17:43:39,590 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 [2021-12-06 17:43:39,596 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 [2021-12-06 17:43:45,959 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-06 17:43:45,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2021-12-06 17:43:45,984 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 [2021-12-06 17:43:46,229 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 17:43:46,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 50 [2021-12-06 17:43:46,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 52 [2021-12-06 17:43:47,364 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 [2021-12-06 17:43:47,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-12-06 17:43:53,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:53,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 17:43:54,008 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-06 17:43:54,009 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 [2021-12-06 17:43:54,352 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-12-06 17:43:54,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 71 [2021-12-06 17:43:54,370 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 17:43:54,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 61 [2021-12-06 17:43:54,835 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:43:54,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 24 [2021-12-06 17:43:54,840 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 [2021-12-06 17:43:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:54,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:43:55,035 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1020 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1021 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1020) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1021) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))) (forall ((v_ArrVal_1020 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1020) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0))))) is different from false [2021-12-06 17:43:55,162 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ldv_malloc_#res.base_155| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_155|)))))) (and (forall ((v_ArrVal_1020 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1021 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1024 (_ BitVec 32))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1020) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (select (store |c_#length| |v_ldv_malloc_#res.base_155| v_ArrVal_1024) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1021) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))) (forall ((v_ArrVal_1020 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1020) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0))))))) is different from false [2021-12-06 17:43:55,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1930281767] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:55,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:43:55,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-12-06 17:43:55,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641095960] [2021-12-06 17:43:55,169 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:43:55,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 17:43:55,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:43:55,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 17:43:55,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2237, Unknown=21, NotChecked=294, Total=2756 [2021-12-06 17:43:55,171 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 46 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 38 states have internal predecessors, (63), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 17:44:10,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:44:10,219 INFO L93 Difference]: Finished difference Result 122 states and 121 transitions. [2021-12-06 17:44:10,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 17:44:10,220 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 38 states have internal predecessors, (63), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 41 [2021-12-06 17:44:10,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:44:10,220 INFO L225 Difference]: With dead ends: 122 [2021-12-06 17:44:10,220 INFO L226 Difference]: Without dead ends: 122 [2021-12-06 17:44:10,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 37.5s TimeCoverageRelationStatistics Valid=324, Invalid=3323, Unknown=25, NotChecked=360, Total=4032 [2021-12-06 17:44:10,222 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 190 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:44:10,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 878 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 779 Invalid, 0 Unknown, 233 Unchecked, 1.4s Time] [2021-12-06 17:44:10,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-06 17:44:10,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 86. [2021-12-06 17:44:10,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 76 states have internal predecessors, (77), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 17:44:10,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2021-12-06 17:44:10,224 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 41 [2021-12-06 17:44:10,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:44:10,224 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2021-12-06 17:44:10,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 38 states have internal predecessors, (63), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 17:44:10,224 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2021-12-06 17:44:10,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 17:44:10,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:44:10,225 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] [2021-12-06 17:44:10,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-12-06 17:44:10,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2021-12-06 17:44:10,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:44:10,626 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:44:10,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:44:10,627 INFO L85 PathProgramCache]: Analyzing trace with hash -678645917, now seen corresponding path program 1 times [2021-12-06 17:44:10,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:44:10,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132739606] [2021-12-06 17:44:10,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:44:10,628 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:44:10,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:44:10,629 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:44:10,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-12-06 17:44:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:44:10,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 17:44:10,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:44:10,837 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 [2021-12-06 17:44:10,892 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:44:10,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 17:44:10,912 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 [2021-12-06 17:44:11,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-12-06 17:44:19,134 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:44:19,134 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 [2021-12-06 17:44:19,246 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-06 17:44:19,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2021-12-06 17:44:19,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2021-12-06 17:44:19,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-12-06 17:44:19,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-06 17:44:25,796 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-12-06 17:44:25,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 53 [2021-12-06 17:44:25,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 17:44:25,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-12-06 17:44:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:44:25,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:44:26,037 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1055 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1055) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))))))))))))) (_ bv1 1)))) is different from false [2021-12-06 17:44:26,053 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:44:26,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132739606] [2021-12-06 17:44:26,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132739606] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:44:26,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1474770654] [2021-12-06 17:44:26,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:44:26,054 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:44:26,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:44:26,055 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:44:26,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2021-12-06 17:44:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:44:26,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 17:44:26,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:44:26,265 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 [2021-12-06 17:44:26,435 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:44:26,435 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 [2021-12-06 17:44:26,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:44:26,493 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 [2021-12-06 17:44:26,647 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 9 treesize of output 7 [2021-12-06 17:44:42,838 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:44:42,838 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 21 treesize of output 21 [2021-12-06 17:44:43,011 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-06 17:44:43,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2021-12-06 17:44:43,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2021-12-06 17:44:43,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-12-06 17:44:43,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-06 17:44:53,993 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-12-06 17:44:53,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 53 [2021-12-06 17:44:54,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 17:44:54,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-12-06 17:44:54,178 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:44:54,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:44:54,237 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1088 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1088) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))))))))) (_ bv1 1)))) is different from false [2021-12-06 17:44:54,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1474770654] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:44:54,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:44:54,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-12-06 17:44:54,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993924942] [2021-12-06 17:44:54,251 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:44:54,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 17:44:54,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:44:54,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 17:44:54,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1480, Unknown=16, NotChecked=158, Total=1806 [2021-12-06 17:44:54,252 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand has 39 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 33 states have internal predecessors, (59), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 17:45:04,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:45:04,509 INFO L93 Difference]: Finished difference Result 121 states and 120 transitions. [2021-12-06 17:45:04,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 17:45:04,509 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 33 states have internal predecessors, (59), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 41 [2021-12-06 17:45:04,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:45:04,510 INFO L225 Difference]: With dead ends: 121 [2021-12-06 17:45:04,510 INFO L226 Difference]: Without dead ends: 121 [2021-12-06 17:45:04,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 50.9s TimeCoverageRelationStatistics Valid=280, Invalid=2361, Unknown=19, NotChecked=202, Total=2862 [2021-12-06 17:45:04,511 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 129 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 1141 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:45:04,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 1141 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1285 Invalid, 0 Unknown, 206 Unchecked, 1.6s Time] [2021-12-06 17:45:04,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-06 17:45:04,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 85. [2021-12-06 17:45:04,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 58 states have (on average 1.3103448275862069) internal successors, (76), 75 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 17:45:04,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-12-06 17:45:04,513 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 41 [2021-12-06 17:45:04,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:45:04,513 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-12-06 17:45:04,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 33 states have internal predecessors, (59), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 17:45:04,513 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-12-06 17:45:04,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 17:45:04,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:45:04,514 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] [2021-12-06 17:45:04,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-12-06 17:45:04,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2021-12-06 17:45:04,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:45:04,915 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:45:04,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:45:04,916 INFO L85 PathProgramCache]: Analyzing trace with hash -678645916, now seen corresponding path program 1 times [2021-12-06 17:45:04,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:45:04,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733592492] [2021-12-06 17:45:04,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:04,918 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:45:04,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:45:04,920 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:45:04,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-12-06 17:45:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:05,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 17:45:05,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:45:05,102 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 [2021-12-06 17:45:05,169 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:45:05,169 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 25 treesize of output 25 [2021-12-06 17:45:05,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:45:05,201 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 [2021-12-06 17:45:05,294 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 [2021-12-06 17:45:05,420 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:45:05,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 17:45:05,515 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-06 17:45:05,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 43 [2021-12-06 17:45:05,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 47 [2021-12-06 17:45:05,891 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 [2021-12-06 17:45:06,176 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-12-06 17:45:06,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 75 [2021-12-06 17:45:06,197 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 17:45:06,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 65 [2021-12-06 17:45:06,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-12-06 17:45:06,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-12-06 17:45:06,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-12-06 17:45:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:45:06,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:45:06,818 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1122 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1122) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_1122 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1121 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1122) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1121) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))))) is different from false [2021-12-06 17:45:06,845 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:45:06,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733592492] [2021-12-06 17:45:06,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733592492] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:45:06,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1987339971] [2021-12-06 17:45:06,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:06,845 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:45:06,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:45:06,846 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:45:06,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2021-12-06 17:45:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:07,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 17:45:07,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:45:07,071 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 [2021-12-06 17:45:07,275 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:45:07,276 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 [2021-12-06 17:45:07,362 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 [2021-12-06 17:45:07,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:45:07,581 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 [2021-12-06 17:45:07,824 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:45:07,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 17:45:07,994 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 17:45:07,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2021-12-06 17:45:07,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2021-12-06 17:45:08,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-12-06 17:45:08,829 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-12-06 17:45:08,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 69 [2021-12-06 17:45:08,845 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 17:45:08,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 65 [2021-12-06 17:45:08,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-12-06 17:45:09,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-12-06 17:45:09,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-12-06 17:45:09,126 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:45:09,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:45:09,198 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1155 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1155) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_1155 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1156 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1155) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1156) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))))) is different from false [2021-12-06 17:45:09,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1987339971] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:45:09,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:45:09,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 36 [2021-12-06 17:45:09,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105772650] [2021-12-06 17:45:09,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:45:09,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 17:45:09,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:45:09,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 17:45:09,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1435, Unknown=2, NotChecked=154, Total=1722 [2021-12-06 17:45:09,231 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 37 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 31 states have internal predecessors, (59), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 17:45:11,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:45:11,611 INFO L93 Difference]: Finished difference Result 120 states and 119 transitions. [2021-12-06 17:45:11,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 17:45:11,611 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 31 states have internal predecessors, (59), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 41 [2021-12-06 17:45:11,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:45:11,612 INFO L225 Difference]: With dead ends: 120 [2021-12-06 17:45:11,612 INFO L226 Difference]: Without dead ends: 120 [2021-12-06 17:45:11,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=293, Invalid=2575, Unknown=2, NotChecked=210, Total=3080 [2021-12-06 17:45:11,613 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 277 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:45:11,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 1159 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 934 Invalid, 0 Unknown, 235 Unchecked, 1.4s Time] [2021-12-06 17:45:11,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-06 17:45:11,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 77. [2021-12-06 17:45:11,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 68 states have internal predecessors, (69), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 17:45:11,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-12-06 17:45:11,615 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 41 [2021-12-06 17:45:11,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:45:11,615 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-12-06 17:45:11,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 31 states have internal predecessors, (59), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 17:45:11,615 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-12-06 17:45:11,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 17:45:11,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:45:11,616 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:45:11,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2021-12-06 17:45:11,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2021-12-06 17:45:12,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:45:12,018 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:45:12,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:45:12,019 INFO L85 PathProgramCache]: Analyzing trace with hash -2050699743, now seen corresponding path program 1 times [2021-12-06 17:45:12,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:45:12,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389082223] [2021-12-06 17:45:12,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:12,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:45:12,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:45:12,020 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:45:12,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-12-06 17:45:12,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:12,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-06 17:45:12,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:45:12,196 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 [2021-12-06 17:45:12,274 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:45:12,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-12-06 17:45:12,306 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 [2021-12-06 17:45:12,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:45:12,412 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 [2021-12-06 17:45:12,552 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:45:12,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-12-06 17:45:12,665 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-06 17:45:12,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2021-12-06 17:45:12,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-12-06 17:45:13,136 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 [2021-12-06 17:45:13,475 INFO L354 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2021-12-06 17:45:13,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 81 [2021-12-06 17:45:13,511 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-06 17:45:13,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 78 [2021-12-06 17:45:13,531 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 29 treesize of output 17 [2021-12-06 17:45:13,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 102 [2021-12-06 17:45:14,128 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-12-06 17:45:14,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 84 [2021-12-06 17:45:14,347 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:45:14,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:45:14,797 INFO L354 Elim1Store]: treesize reduction 5, result has 87.2 percent of original size [2021-12-06 17:45:14,798 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 138 treesize of output 137 [2021-12-06 17:45:14,835 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1194 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ldv_malloc_#res.base_170| (_ BitVec 32))) (let ((.cse0 (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|) |c_ULTIMATE.start_alloc_10_#t~mem39#1.offset| |v_ldv_malloc_#res.base_170|)))) (select .cse1 (select (select .cse1 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1194) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))) (or (= .cse0 |v_ldv_malloc_#res.base_170|) (= .cse0 |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|)))) is different from false [2021-12-06 17:45:14,838 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:45:14,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389082223] [2021-12-06 17:45:14,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389082223] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:45:14,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1933681475] [2021-12-06 17:45:14,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:14,838 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:45:14,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:45:14,839 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:45:14,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2021-12-06 17:45:15,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:15,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-06 17:45:15,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:45:15,093 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 [2021-12-06 17:45:20,332 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:45:20,332 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 [2021-12-06 17:45:20,478 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 [2021-12-06 17:45:20,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:45:20,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-12-06 17:45:23,166 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-06 17:45:23,166 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 [2021-12-06 17:45:23,409 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 17:45:23,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 36 [2021-12-06 17:45:23,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 52 [2021-12-06 17:45:25,092 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-12-06 17:45:25,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 80 [2021-12-06 17:45:25,111 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 17:45:25,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 81 [2021-12-06 17:45:25,622 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 75 treesize of output 55 [2021-12-06 17:45:25,886 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:45:25,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 31 [2021-12-06 17:45:25,938 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:45:25,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:45:26,079 INFO L354 Elim1Store]: treesize reduction 5, result has 82.8 percent of original size [2021-12-06 17:45:26,079 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 48 treesize of output 47 [2021-12-06 17:45:26,089 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1232 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1233 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1232))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1233) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|)) is different from false [2021-12-06 17:45:26,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1933681475] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:45:26,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:45:26,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-12-06 17:45:26,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373410186] [2021-12-06 17:45:26,097 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:45:26,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 17:45:26,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:45:26,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 17:45:26,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1926, Unknown=5, NotChecked=178, Total=2256 [2021-12-06 17:45:26,098 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 42 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 35 states have internal predecessors, (63), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 17:45:35,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:45:35,960 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2021-12-06 17:45:35,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 17:45:35,961 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 35 states have internal predecessors, (63), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 42 [2021-12-06 17:45:35,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:45:35,961 INFO L225 Difference]: With dead ends: 83 [2021-12-06 17:45:35,961 INFO L226 Difference]: Without dead ends: 83 [2021-12-06 17:45:35,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=348, Invalid=3560, Unknown=6, NotChecked=246, Total=4160 [2021-12-06 17:45:35,963 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 84 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 270 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:45:35,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 750 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 488 Invalid, 0 Unknown, 270 Unchecked, 0.7s Time] [2021-12-06 17:45:35,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-06 17:45:35,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2021-12-06 17:45:35,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 67 states have internal predecessors, (68), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 17:45:35,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2021-12-06 17:45:35,964 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 42 [2021-12-06 17:45:35,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:45:35,965 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2021-12-06 17:45:35,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 35 states have internal predecessors, (63), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 17:45:35,965 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2021-12-06 17:45:35,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 17:45:35,965 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:45:35,965 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:45:35,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (53)] Ended with exit code 0 [2021-12-06 17:45:36,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (54)] Ended with exit code 0 [2021-12-06 17:45:36,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:45:36,367 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:45:36,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:45:36,368 INFO L85 PathProgramCache]: Analyzing trace with hash -2050699742, now seen corresponding path program 1 times [2021-12-06 17:45:36,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:45:36,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [28317596] [2021-12-06 17:45:36,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:36,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:45:36,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:45:36,372 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:45:36,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-12-06 17:45:36,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:36,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-06 17:45:36,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:45:36,651 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 [2021-12-06 17:45:36,737 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:45:36,737 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 [2021-12-06 17:45:36,779 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 [2021-12-06 17:45:36,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-12-06 17:45:42,978 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 [2021-12-06 17:45:45,137 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-12-06 17:45:45,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 60 [2021-12-06 17:45:45,395 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-06 17:45:45,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 57 [2021-12-06 17:45:45,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 80 [2021-12-06 17:45:46,186 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 17 treesize of output 3 [2021-12-06 17:45:46,196 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 60 treesize of output 38 [2021-12-06 17:45:48,620 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-12-06 17:45:48,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 74 [2021-12-06 17:45:48,633 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 26 [2021-12-06 17:45:48,817 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-12-06 17:45:48,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 94 [2021-12-06 17:45:48,848 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-12-06 17:45:48,848 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 87 [2021-12-06 17:45:49,222 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-06 17:45:49,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 46 [2021-12-06 17:45:49,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2021-12-06 17:45:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:45:49,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:45:50,020 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1272 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1271 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (let ((.cse1 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1271))) (select (select .cse1 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1272) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (select (select .cse1 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_1272 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1271 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1271)) (.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1272))) (let ((.cse3 (select (select .cse5 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (.cse4 (select (select .cse2 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule (bvadd (_ bv4 32) (select (select .cse2 .cse3) .cse4)) (select |c_#length| (select (select .cse5 .cse3) .cse4))))))) is different from false [2021-12-06 17:45:57,013 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:45:57,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [28317596] [2021-12-06 17:45:57,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [28317596] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:45:57,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2100352317] [2021-12-06 17:45:57,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:57,013 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:45:57,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:45:57,014 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:45:57,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2021-12-06 17:45:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:57,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-06 17:45:57,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:45:57,267 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 [2021-12-06 17:45:57,636 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:45:57,636 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 [2021-12-06 17:45:57,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:45:57,793 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 [2021-12-06 17:45:58,166 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 [2021-12-06 17:46:12,513 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-06 17:46:12,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-12-06 17:46:12,902 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-06 17:46:12,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-12-06 17:46:12,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 50 [2021-12-06 17:46:18,602 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-12-06 17:46:18,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 106 [2021-12-06 17:46:18,642 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-12-06 17:46:18,642 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 93 [2021-12-06 17:46:19,554 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-06 17:46:19,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 56 [2021-12-06 17:46:19,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 17 [2021-12-06 17:46:19,755 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:46:19,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:46:19,856 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:46:19,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 110 [2021-12-06 17:46:20,052 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1313 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1312 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (let ((.cse1 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1312))) (select (select .cse1 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1313) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (select (select .cse1 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_prenex_13 (Array (_ BitVec 32) (_ BitVec 32))) (v_prenex_12 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_prenex_13))) (select (select .cse2 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_prenex_12) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (select (select .cse2 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (_ bv4 32)) (bvadd |c_ULTIMATE.start_alloc_10_#t~mem39#1.offset| (_ bv4 32)))) (forall ((v_prenex_13 (Array (_ BitVec 32) (_ BitVec 32))) (v_prenex_12 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_prenex_13)) (.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_prenex_12))) (let ((.cse4 (select (select .cse6 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (.cse5 (select (select .cse3 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (or (= (bvadd (select (select .cse3 .cse4) .cse5) (_ bv4 32)) (_ bv0 32)) (= (select (select .cse6 .cse4) .cse5) |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|)))))) is different from false [2021-12-06 17:46:20,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2100352317] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:46:20,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:46:20,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 42 [2021-12-06 17:46:20,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461005239] [2021-12-06 17:46:20,100 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:46:20,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-06 17:46:20,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:46:20,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-06 17:46:20,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2068, Unknown=24, NotChecked=186, Total=2450 [2021-12-06 17:46:20,102 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand has 43 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 35 states have internal predecessors, (62), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 17:46:42,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:46:42,336 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2021-12-06 17:46:42,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 17:46:42,336 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 35 states have internal predecessors, (62), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 42 [2021-12-06 17:46:42,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:46:42,337 INFO L225 Difference]: With dead ends: 89 [2021-12-06 17:46:42,337 INFO L226 Difference]: Without dead ends: 89 [2021-12-06 17:46:42,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 62.3s TimeCoverageRelationStatistics Valid=368, Invalid=3902, Unknown=28, NotChecked=258, Total=4556 [2021-12-06 17:46:42,337 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 52 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 306 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:46:42,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 936 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 376 Invalid, 0 Unknown, 306 Unchecked, 0.6s Time] [2021-12-06 17:46:42,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-06 17:46:42,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2021-12-06 17:46:42,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 66 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 17:46:42,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-12-06 17:46:42,339 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 42 [2021-12-06 17:46:42,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:46:42,339 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-12-06 17:46:42,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 35 states have internal predecessors, (62), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 17:46:42,339 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-12-06 17:46:42,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 17:46:42,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:46:42,340 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:46:42,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2021-12-06 17:46:42,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (55)] Ended with exit code 0 [2021-12-06 17:46:42,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:46:42,742 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:46:42,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:46:42,743 INFO L85 PathProgramCache]: Analyzing trace with hash 852817446, now seen corresponding path program 1 times [2021-12-06 17:46:42,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:46:42,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312832440] [2021-12-06 17:46:42,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:46:42,744 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:46:42,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:46:42,747 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:46:42,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-12-06 17:46:42,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:42,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-06 17:46:42,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:46:42,987 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 [2021-12-06 17:46:43,100 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:46:43,101 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 [2021-12-06 17:46:43,162 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 [2021-12-06 17:46:43,315 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 [2021-12-06 17:46:49,438 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-06 17:46:49,438 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 [2021-12-06 17:46:49,574 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-06 17:46:49,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-12-06 17:46:49,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 50 [2021-12-06 17:46:50,581 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-12-06 17:46:50,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 104 [2021-12-06 17:46:50,616 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-06 17:46:50,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 99 treesize of output 74 [2021-12-06 17:46:51,020 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-06 17:46:51,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 56 [2021-12-06 17:46:51,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 16 [2021-12-06 17:46:51,313 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:46:51,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:46:51,670 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1350 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|) |c_ULTIMATE.start_alloc_10_#t~mem39#1.offset| |c_ULTIMATE.start_alloc_10_#t~ret40#1.offset|))) (.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1350))) (let ((.cse2 (select (select .cse1 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (.cse3 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select .cse0 (select (select .cse1 .cse2) .cse3)) (select (select .cse0 .cse2) .cse3)))) (_ bv0 32))) is different from false [2021-12-06 17:46:51,700 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1350 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|) |c_ULTIMATE.start_alloc_10_#t~mem39#1.offset| (_ bv0 32)))) (.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1350))) (let ((.cse2 (select (select .cse1 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (.cse3 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select .cse0 (select (select .cse1 .cse2) .cse3)) (select (select .cse0 .cse2) .cse3)))) (_ bv0 32))) is different from false [2021-12-06 17:46:51,703 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:46:51,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312832440] [2021-12-06 17:46:51,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312832440] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:46:51,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [284385511] [2021-12-06 17:46:51,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:46:51,703 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:46:51,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:46:51,704 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:46:51,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2021-12-06 17:46:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:51,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-06 17:46:51,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:46:51,962 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 [2021-12-06 17:46:54,415 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:46:54,415 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 [2021-12-06 17:46:54,571 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 [2021-12-06 17:46:54,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:46:54,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-12-06 17:46:59,321 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-06 17:46:59,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2021-12-06 17:46:59,638 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 17:46:59,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-12-06 17:46:59,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 53 [2021-12-06 17:47:01,735 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-12-06 17:47:01,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 85 [2021-12-06 17:47:01,769 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-12-06 17:47:01,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 74 [2021-12-06 17:47:02,715 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:47:02,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 45 [2021-12-06 17:47:03,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-12-06 17:47:03,148 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:47:03,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:47:03,182 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1388 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|) |c_ULTIMATE.start_alloc_10_#t~mem39#1.offset| |c_ULTIMATE.start_alloc_10_#t~ret40#1.offset|))) (.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1388))) (let ((.cse2 (select (select .cse1 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (.cse3 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select .cse0 (select (select .cse1 .cse2) .cse3)) (select (select .cse0 .cse2) .cse3)))) (_ bv0 32))) is different from false [2021-12-06 17:47:03,215 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1388 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|) |c_ULTIMATE.start_alloc_10_#t~mem39#1.offset| (_ bv0 32)))) (.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1388))) (let ((.cse2 (select (select .cse1 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (.cse3 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select .cse0 (select (select .cse1 .cse2) .cse3)) (select (select .cse0 .cse2) .cse3)))) (_ bv0 32))) is different from false [2021-12-06 17:47:03,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [284385511] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:47:03,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:47:03,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 46 [2021-12-06 17:47:03,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147519486] [2021-12-06 17:47:03,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:47:03,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-06 17:47:03,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:47:03,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-06 17:47:03,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2386, Unknown=8, NotChecked=404, Total=2970 [2021-12-06 17:47:03,219 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 47 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 39 states have internal predecessors, (65), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 17:47:19,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:47:19,235 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-12-06 17:47:19,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 17:47:19,235 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 39 states have internal predecessors, (65), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 43 [2021-12-06 17:47:19,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:47:19,236 INFO L225 Difference]: With dead ends: 84 [2021-12-06 17:47:19,236 INFO L226 Difference]: Without dead ends: 84 [2021-12-06 17:47:19,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 33.1s TimeCoverageRelationStatistics Valid=362, Invalid=4198, Unknown=12, NotChecked=540, Total=5112 [2021-12-06 17:47:19,236 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 53 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1049 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 328 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:47:19,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 1049 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 517 Invalid, 0 Unknown, 328 Unchecked, 0.9s Time] [2021-12-06 17:47:19,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-06 17:47:19,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-12-06 17:47:19,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 60 states have (on average 1.25) internal successors, (75), 74 states have internal predecessors, (75), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 17:47:19,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2021-12-06 17:47:19,238 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 43 [2021-12-06 17:47:19,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:47:19,239 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2021-12-06 17:47:19,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 39 states have internal predecessors, (65), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 17:47:19,239 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2021-12-06 17:47:19,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 17:47:19,239 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:47:19,239 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] [2021-12-06 17:47:19,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (57)] Ended with exit code 0 [2021-12-06 17:47:19,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (58)] Ended with exit code 0 [2021-12-06 17:47:19,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:47:19,641 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:47:19,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:47:19,642 INFO L85 PathProgramCache]: Analyzing trace with hash 656303941, now seen corresponding path program 1 times [2021-12-06 17:47:19,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:47:19,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1461421412] [2021-12-06 17:47:19,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:47:19,644 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:47:19,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:47:19,646 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:47:19,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-12-06 17:47:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:19,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-06 17:47:19,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:47:19,943 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 [2021-12-06 17:47:20,065 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-12-06 17:47:20,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 45 [2021-12-06 17:47:20,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:47:20,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:47:20,367 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:47:20,367 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 [2021-12-06 17:47:20,624 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-12-06 17:47:20,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 47 [2021-12-06 17:47:20,866 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-06 17:47:20,866 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-12-06 17:47:20,871 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2021-12-06 17:47:21,562 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:47:21,562 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 [2021-12-06 17:47:22,352 INFO L354 Elim1Store]: treesize reduction 119, result has 15.6 percent of original size [2021-12-06 17:47:22,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 146 treesize of output 88 [2021-12-06 17:47:22,392 INFO L354 Elim1Store]: treesize reduction 88, result has 14.6 percent of original size [2021-12-06 17:47:22,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 48 [2021-12-06 17:47:23,925 INFO L354 Elim1Store]: treesize reduction 101, result has 9.8 percent of original size [2021-12-06 17:47:23,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 153 treesize of output 88 [2021-12-06 17:47:25,056 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 17:47:25,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 28 [2021-12-06 17:47:25,081 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-06 17:47:25,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-12-06 17:47:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:47:25,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:47:53,355 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:47:53,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1461421412] [2021-12-06 17:47:53,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1461421412] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:47:53,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1312575959] [2021-12-06 17:47:53,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:47:53,356 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:47:53,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:47:53,356 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:47:53,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2021-12-06 17:47:53,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:53,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-06 17:47:53,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:47:53,625 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 [2021-12-06 17:47:54,460 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:47:54,460 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 [2021-12-06 17:47:54,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:47:54,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:47:55,425 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 [2021-12-06 17:48:11,905 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 [2021-12-06 17:48:14,278 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-06 17:48:14,278 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 35 treesize of output 37 [2021-12-06 17:48:14,724 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-06 17:48:14,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-12-06 17:48:14,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 63 [2021-12-06 17:48:16,379 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 17 treesize of output 3 [2021-12-06 17:48:17,865 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-12-06 17:48:17,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 142 treesize of output 115 [2021-12-06 17:48:17,925 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-06 17:48:17,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 116 treesize of output 87 [2021-12-06 17:48:19,288 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-06 17:48:19,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 53 [2021-12-06 17:48:19,799 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 17:48:19,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 31 [2021-12-06 17:48:19,809 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:19,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:48:23,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1312575959] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:48:23,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:48:23,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2021-12-06 17:48:23,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832147870] [2021-12-06 17:48:23,070 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:48:23,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 17:48:23,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:48:23,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 17:48:23,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=4150, Unknown=32, NotChecked=0, Total=4422 [2021-12-06 17:48:23,071 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand has 48 states, 43 states have (on average 1.558139534883721) internal successors, (67), 39 states have internal predecessors, (67), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 17:48:37,352 WARN L227 SmtUtils]: Spent 8.12s on a formula simplification. DAG size of input: 70 DAG size of output: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:48:43,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:43,710 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2021-12-06 17:48:43,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 17:48:43,711 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.558139534883721) internal successors, (67), 39 states have internal predecessors, (67), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 43 [2021-12-06 17:48:43,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:43,712 INFO L225 Difference]: With dead ends: 83 [2021-12-06 17:48:43,712 INFO L226 Difference]: Without dead ends: 83 [2021-12-06 17:48:43,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2452 ImplicationChecksByTransitivity, 76.4s TimeCoverageRelationStatistics Valid=475, Invalid=7503, Unknown=32, NotChecked=0, Total=8010 [2021-12-06 17:48:43,713 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 24 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 569 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:43,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 1107 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 330 Invalid, 0 Unknown, 569 Unchecked, 0.9s Time] [2021-12-06 17:48:43,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-06 17:48:43,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2021-12-06 17:48:43,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 65 states have internal predecessors, (66), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 17:48:43,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2021-12-06 17:48:43,715 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 43 [2021-12-06 17:48:43,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:43,716 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2021-12-06 17:48:43,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.558139534883721) internal successors, (67), 39 states have internal predecessors, (67), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 17:48:43,716 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2021-12-06 17:48:43,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 17:48:43,716 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:43,716 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:43,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (60)] Ended with exit code 0 [2021-12-06 17:48:43,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (59)] Ended with exit code 0 [2021-12-06 17:48:44,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:48:44,118 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:48:44,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:44,119 INFO L85 PathProgramCache]: Analyzing trace with hash 667537153, now seen corresponding path program 1 times [2021-12-06 17:48:44,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:48:44,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1950243865] [2021-12-06 17:48:44,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:44,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:48:44,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:48:44,122 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:48:44,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-12-06 17:48:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:44,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 17:48:44,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:44,457 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 [2021-12-06 17:48:44,649 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:48:44,649 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 28 treesize of output 35 [2021-12-06 17:48:44,739 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 [2021-12-06 17:48:44,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-12-06 17:48:53,138 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-06 17:48:53,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 39 [2021-12-06 17:48:53,348 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-06 17:48:53,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 36 [2021-12-06 17:48:53,355 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 0 case distinctions, treesize of input 47 treesize of output 47 [2021-12-06 17:48:57,063 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-12-06 17:48:57,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 61 [2021-12-06 17:48:57,125 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-12-06 17:48:57,125 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 86 [2021-12-06 17:48:57,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 61 [2021-12-06 17:48:58,307 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-12-06 17:48:58,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 25 [2021-12-06 17:48:58,433 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:58,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:48:59,097 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1503 (Array (_ BitVec 32) (_ BitVec 32)))) (bvult (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1503)) (.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|) |c_ULTIMATE.start_alloc_10_#t~mem39#1.offset| |c_ULTIMATE.start_alloc_10_#t~ret40#1.base|)))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (.cse2 (select (select .cse3 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select .cse0 (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2)))) |c_#StackHeapBarrier|)) is different from false [2021-12-06 17:48:59,158 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ldv_malloc_#res.base_198| (_ BitVec 32)) (v_ArrVal_1503 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1503)) (.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|) |c_ULTIMATE.start_alloc_10_#t~mem39#1.offset| |v_ldv_malloc_#res.base_198|)))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (.cse2 (select (select .cse3 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select .cse0 (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2)))) |v_ldv_malloc_#res.base_198|)) is different from false [2021-12-06 17:48:59,163 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:48:59,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1950243865] [2021-12-06 17:48:59,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1950243865] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:48:59,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1469157758] [2021-12-06 17:48:59,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:59,164 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:48:59,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:48:59,164 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:48:59,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2021-12-06 17:48:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:59,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-06 17:48:59,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:59,439 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 [2021-12-06 17:49:02,175 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:49:02,175 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 [2021-12-06 17:49:02,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:49:02,438 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 [2021-12-06 17:49:03,133 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 [2021-12-06 17:49:05,760 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-06 17:49:05,760 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 35 treesize of output 37 [2021-12-06 17:49:06,183 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 17:49:06,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-12-06 17:49:06,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 53 [2021-12-06 17:49:09,474 INFO L354 Elim1Store]: treesize reduction 111, result has 14.0 percent of original size [2021-12-06 17:49:09,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 63 [2021-12-06 17:49:09,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:49:09,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 57 [2021-12-06 17:49:10,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:49:10,937 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 17:49:10,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 42 [2021-12-06 17:49:13,342 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-12-06 17:49:13,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 25 [2021-12-06 17:49:13,353 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:13,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:13,423 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1543 (Array (_ BitVec 32) (_ BitVec 32)))) (bvult (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1543)) (.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|) |c_ULTIMATE.start_alloc_10_#t~mem39#1.offset| |c_ULTIMATE.start_alloc_10_#t~ret40#1.base|)))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (.cse2 (select (select .cse3 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select .cse0 (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2)))) |c_#StackHeapBarrier|)) is different from false [2021-12-06 17:49:13,485 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ldv_malloc_#res.base_201| (_ BitVec 32)) (v_ArrVal_1543 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1543)) (.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|) |c_ULTIMATE.start_alloc_10_#t~mem39#1.offset| |v_ldv_malloc_#res.base_201|)))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (.cse2 (select (select .cse3 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select .cse0 (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2)))) |v_ldv_malloc_#res.base_201|)) is different from false [2021-12-06 17:49:13,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1469157758] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:13,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:49:13,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 45 [2021-12-06 17:49:13,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706949270] [2021-12-06 17:49:13,490 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:13,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 17:49:13,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:49:13,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 17:49:13,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=2260, Unknown=10, NotChecked=396, Total=2862 [2021-12-06 17:49:13,491 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand has 46 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 38 states have internal predecessors, (66), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 17:49:23,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:23,307 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-12-06 17:49:23,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 17:49:23,307 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 38 states have internal predecessors, (66), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 44 [2021-12-06 17:49:23,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:23,308 INFO L225 Difference]: With dead ends: 84 [2021-12-06 17:49:23,308 INFO L226 Difference]: Without dead ends: 84 [2021-12-06 17:49:23,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=325, Invalid=3340, Unknown=11, NotChecked=484, Total=4160 [2021-12-06 17:49:23,309 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 45 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:23,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 606 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 382 Invalid, 0 Unknown, 266 Unchecked, 1.1s Time] [2021-12-06 17:49:23,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-06 17:49:23,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-12-06 17:49:23,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 74 states have internal predecessors, (75), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 17:49:23,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2021-12-06 17:49:23,312 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 44 [2021-12-06 17:49:23,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:23,312 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2021-12-06 17:49:23,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 38 states have internal predecessors, (66), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 17:49:23,313 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2021-12-06 17:49:23,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 17:49:23,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:23,313 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] [2021-12-06 17:49:23,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2021-12-06 17:49:23,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (62)] Forceful destruction successful, exit code 0 [2021-12-06 17:49:23,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:49:23,715 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:49:23,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:23,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1129414206, now seen corresponding path program 1 times [2021-12-06 17:49:23,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:49:23,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043900213] [2021-12-06 17:49:23,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:23,718 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:49:23,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:49:23,719 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:49:23,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-12-06 17:49:24,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:24,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-06 17:49:24,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:24,233 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:49:24,233 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 [2021-12-06 17:49:24,402 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 0 case distinctions, treesize of input 21 treesize of output 17 [2021-12-06 17:49:24,706 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-06 17:49:24,706 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 35 treesize of output 52 [2021-12-06 17:49:24,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2021-12-06 17:49:25,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-12-06 17:49:25,905 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-12-06 17:49:25,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 52 [2021-12-06 17:49:26,308 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-06 17:49:26,308 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 49 [2021-12-06 17:49:26,316 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 62 [2021-12-06 17:49:29,066 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-12-06 17:49:29,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 149 treesize of output 80 [2021-12-06 17:49:29,134 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-12-06 17:49:29,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 117 treesize of output 107 [2021-12-06 17:49:30,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 76 [2021-12-06 17:49:30,454 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-12-06 17:49:30,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 33 [2021-12-06 17:49:30,647 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:30,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:31,479 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1578 (Array (_ BitVec 32) (_ BitVec 32)))) (bvult (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1578)) (.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|) |c_ULTIMATE.start_alloc_10_#t~mem39#1.offset| |c_ULTIMATE.start_alloc_10_#t~ret40#1.base|)))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (.cse2 (select (select .cse3 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select .cse0 (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2)))) |c_#StackHeapBarrier|)) is different from false [2021-12-06 17:49:32,069 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:49:32,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043900213] [2021-12-06 17:49:32,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2043900213] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:32,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [639126084] [2021-12-06 17:49:32,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:32,070 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:49:32,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:49:32,071 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:49:32,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2021-12-06 17:49:32,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:32,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-06 17:49:32,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:34,937 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:49:34,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-12-06 17:49:35,407 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 0 case distinctions, treesize of input 19 treesize of output 15 [2021-12-06 17:49:35,692 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-06 17:49:35,692 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 35 treesize of output 52 [2021-12-06 17:49:36,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2021-12-06 17:49:36,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:49:37,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 24 [2021-12-06 17:49:37,606 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 [2021-12-06 17:49:38,102 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-12-06 17:49:38,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 50 [2021-12-06 17:49:38,653 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-06 17:49:38,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 49 [2021-12-06 17:49:38,662 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 75 [2021-12-06 17:49:40,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 17 treesize of output 3 [2021-12-06 17:49:42,391 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-12-06 17:49:42,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 166 treesize of output 85 [2021-12-06 17:49:42,446 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-12-06 17:49:42,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 134 treesize of output 122 [2021-12-06 17:49:43,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 89 [2021-12-06 17:49:44,417 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-12-06 17:49:44,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 43 [2021-12-06 17:49:44,427 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 11 treesize of output 7 [2021-12-06 17:49:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:44,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:47,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [639126084] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:47,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:49:47,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 49 [2021-12-06 17:49:47,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166621172] [2021-12-06 17:49:47,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:47,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 17:49:47,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:49:47,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 17:49:47,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=3623, Unknown=24, NotChecked=122, Total=4032 [2021-12-06 17:49:47,353 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand has 51 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 41 states have internal predecessors, (67), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 17:49:57,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:57,737 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2021-12-06 17:49:57,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 17:49:57,738 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 41 states have internal predecessors, (67), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 44 [2021-12-06 17:49:57,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:57,738 INFO L225 Difference]: With dead ends: 83 [2021-12-06 17:49:57,739 INFO L226 Difference]: Without dead ends: 83 [2021-12-06 17:49:57,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=399, Invalid=5279, Unknown=26, NotChecked=148, Total=5852 [2021-12-06 17:49:57,739 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 36 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 341 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:57,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 521 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 248 Invalid, 0 Unknown, 341 Unchecked, 0.8s Time] [2021-12-06 17:49:57,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-06 17:49:57,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2021-12-06 17:49:57,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.25) internal successors, (65), 64 states have internal predecessors, (65), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 17:49:57,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-12-06 17:49:57,742 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 44 [2021-12-06 17:49:57,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:57,742 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-12-06 17:49:57,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 41 states have internal predecessors, (67), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 17:49:57,742 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-12-06 17:49:57,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 17:49:57,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:57,743 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:57,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (64)] Ended with exit code 0 [2021-12-06 17:49:57,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (63)] Ended with exit code 0 [2021-12-06 17:49:58,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:49:58,144 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:49:58,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:58,145 INFO L85 PathProgramCache]: Analyzing trace with hash -781184632, now seen corresponding path program 1 times [2021-12-06 17:49:58,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:49:58,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1153312747] [2021-12-06 17:49:58,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:58,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:49:58,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:49:58,149 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:49:58,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2021-12-06 17:49:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:58,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-06 17:49:58,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:58,349 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 [2021-12-06 17:49:58,549 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:49:58,549 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 [2021-12-06 17:49:58,643 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 [2021-12-06 17:49:58,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:49:58,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-12-06 17:50:07,075 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-06 17:50:07,076 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 [2021-12-06 17:50:07,293 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-06 17:50:07,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 36 [2021-12-06 17:50:07,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 47 [2021-12-06 17:50:08,215 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 [2021-12-06 17:50:08,769 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-12-06 17:50:08,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 61 [2021-12-06 17:50:08,833 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-12-06 17:50:08,834 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 92 treesize of output 92 [2021-12-06 17:50:09,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 68 [2021-12-06 17:50:09,683 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-12-06 17:50:09,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 33 [2021-12-06 17:50:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:09,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:50:12,525 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1654 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1654)) (.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|) |c_ULTIMATE.start_alloc_10_#t~mem39#1.offset| |c_ULTIMATE.start_alloc_10_#t~ret40#1.base|)))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (.cse2 (select (select .cse3 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select .cse0 (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2)))))))))))))))))))) (_ bv1 1)))) is different from false [2021-12-06 17:50:12,577 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 241 treesize of output 170 [2021-12-06 17:50:12,599 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1654 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ldv_malloc_#res.base_210| (_ BitVec 32))) (= |v_ldv_malloc_#res.base_210| (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1654)) (.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|) |c_ULTIMATE.start_alloc_10_#t~mem39#1.offset| |v_ldv_malloc_#res.base_210|)))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (.cse2 (select (select .cse3 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select .cse0 (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2)))))) is different from false [2021-12-06 17:50:12,603 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:50:12,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1153312747] [2021-12-06 17:50:12,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1153312747] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:50:12,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [305176619] [2021-12-06 17:50:12,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:12,603 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:50:12,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:50:12,604 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:50:12,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2021-12-06 17:50:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:12,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-06 17:50:12,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:50:12,877 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 [2021-12-06 17:50:15,541 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:50:15,541 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 [2021-12-06 17:50:15,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:50:15,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-12-06 17:50:16,674 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 [2021-12-06 17:50:21,268 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-06 17:50:21,269 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 35 treesize of output 37 [2021-12-06 17:50:21,734 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 17:50:21,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-12-06 17:50:21,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 53 [2021-12-06 17:50:23,529 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 [2021-12-06 17:50:24,533 INFO L354 Elim1Store]: treesize reduction 111, result has 14.0 percent of original size [2021-12-06 17:50:24,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 56 [2021-12-06 17:50:24,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:50:24,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 60 [2021-12-06 17:50:25,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:50:25,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 45 [2021-12-06 17:50:28,286 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-12-06 17:50:28,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 35 [2021-12-06 17:50:28,382 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:28,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:50:28,796 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1696 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1696)) (.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|) |c_ULTIMATE.start_alloc_10_#t~mem39#1.offset| |c_ULTIMATE.start_alloc_10_#t~ret40#1.base|)))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (.cse2 (select (select .cse3 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select .cse0 (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2))))))))))))))))) (_ bv1 1)))) is different from false [2021-12-06 17:50:28,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 236 treesize of output 165 [2021-12-06 17:50:28,867 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ldv_malloc_#res.base_213| (_ BitVec 32)) (v_ArrVal_1696 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1696)) (.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|) |c_ULTIMATE.start_alloc_10_#t~mem39#1.offset| |v_ldv_malloc_#res.base_213|)))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (.cse2 (select (select .cse3 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select .cse0 (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2)))) |v_ldv_malloc_#res.base_213|)) is different from false [2021-12-06 17:50:28,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [305176619] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:50:28,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:50:28,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 45 [2021-12-06 17:50:28,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14018370] [2021-12-06 17:50:28,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:50:28,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 17:50:28,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:50:28,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 17:50:28,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2257, Unknown=11, NotChecked=396, Total=2862 [2021-12-06 17:50:28,873 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 46 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 38 states have internal predecessors, (67), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 17:50:42,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:42,151 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-12-06 17:50:42,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 17:50:42,151 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 38 states have internal predecessors, (67), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 45 [2021-12-06 17:50:42,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:42,152 INFO L225 Difference]: With dead ends: 84 [2021-12-06 17:50:42,152 INFO L226 Difference]: Without dead ends: 84 [2021-12-06 17:50:42,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 52 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 39.5s TimeCoverageRelationStatistics Valid=327, Invalid=3336, Unknown=13, NotChecked=484, Total=4160 [2021-12-06 17:50:42,153 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 51 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:42,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 482 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 371 Invalid, 0 Unknown, 262 Unchecked, 0.9s Time] [2021-12-06 17:50:42,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-06 17:50:42,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-12-06 17:50:42,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 74 states have internal predecessors, (75), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 17:50:42,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2021-12-06 17:50:42,155 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 45 [2021-12-06 17:50:42,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:42,156 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2021-12-06 17:50:42,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 38 states have internal predecessors, (67), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 17:50:42,156 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2021-12-06 17:50:42,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 17:50:42,156 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:42,156 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] [2021-12-06 17:50:42,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (65)] Ended with exit code 0 [2021-12-06 17:50:42,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (66)] Ended with exit code 0 [2021-12-06 17:50:42,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:50:42,558 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:50:42,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:42,559 INFO L85 PathProgramCache]: Analyzing trace with hash -652101913, now seen corresponding path program 1 times [2021-12-06 17:50:42,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:50:42,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413587581] [2021-12-06 17:50:42,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:42,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:50:42,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:50:42,562 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:50:42,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2021-12-06 17:50:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:42,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-06 17:50:42,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:50:42,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2021-12-06 17:50:43,122 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-12-06 17:50:43,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-12-06 17:50:43,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:50:43,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:50:43,640 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:50:43,640 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 [2021-12-06 17:50:44,050 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-12-06 17:50:44,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 44 [2021-12-06 17:50:44,403 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-06 17:50:44,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-12-06 17:50:44,411 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2021-12-06 17:50:45,420 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:50:45,420 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 [2021-12-06 17:50:46,526 INFO L354 Elim1Store]: treesize reduction 119, result has 15.6 percent of original size [2021-12-06 17:50:46,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 117 treesize of output 75 [2021-12-06 17:50:46,590 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-06 17:50:46,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 44 treesize of output 49 [2021-12-06 17:50:46,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-12-06 17:50:48,752 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 17:50:48,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 67 [2021-12-06 17:50:49,810 INFO L354 Elim1Store]: treesize reduction 33, result has 10.8 percent of original size [2021-12-06 17:50:49,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 46 [2021-12-06 17:50:49,872 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-06 17:50:49,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 28 [2021-12-06 17:50:49,972 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:50:49,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:50:51,112 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:50:51,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413587581] [2021-12-06 17:50:51,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [413587581] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:50:51,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1208281447] [2021-12-06 17:50:51,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:51,112 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:50:51,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:50:51,113 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:50:51,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2021-12-06 17:50:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:51,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-06 17:50:51,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:50:51,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-12-06 17:50:52,014 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:50:52,014 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 [2021-12-06 17:50:52,222 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 [2021-12-06 17:50:52,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:50:52,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-12-06 17:51:09,139 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 [2021-12-06 17:51:11,423 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-06 17:51:11,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-12-06 17:51:11,847 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-06 17:51:11,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-12-06 17:51:11,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 63 [2021-12-06 17:51:13,333 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 17 treesize of output 3 [2021-12-06 17:51:14,675 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-12-06 17:51:14,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 142 treesize of output 77 [2021-12-06 17:51:14,737 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-12-06 17:51:14,738 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 118 treesize of output 108 [2021-12-06 17:51:15,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 77 [2021-12-06 17:51:16,337 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-12-06 17:51:16,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 35 [2021-12-06 17:51:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:16,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:19,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1208281447] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:19,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:51:19,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2021-12-06 17:51:19,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263735420] [2021-12-06 17:51:19,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:19,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 17:51:19,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:51:19,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 17:51:19,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=3308, Unknown=34, NotChecked=0, Total=3540 [2021-12-06 17:51:19,110 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand has 48 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 39 states have internal predecessors, (69), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 17:51:41,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:41,239 INFO L93 Difference]: Finished difference Result 110 states and 109 transitions. [2021-12-06 17:51:41,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 17:51:41,240 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 39 states have internal predecessors, (69), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 45 [2021-12-06 17:51:41,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:41,241 INFO L225 Difference]: With dead ends: 110 [2021-12-06 17:51:41,241 INFO L226 Difference]: Without dead ends: 110 [2021-12-06 17:51:41,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1987 ImplicationChecksByTransitivity, 50.1s TimeCoverageRelationStatistics Valid=428, Invalid=6507, Unknown=37, NotChecked=0, Total=6972 [2021-12-06 17:51:41,242 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 50 mSDsluCounter, 1302 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1367 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 675 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:41,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1367 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 454 Invalid, 0 Unknown, 675 Unchecked, 1.2s Time] [2021-12-06 17:51:41,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-06 17:51:41,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 72. [2021-12-06 17:51:41,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 63 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 17:51:41,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2021-12-06 17:51:41,246 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 45 [2021-12-06 17:51:41,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:41,246 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2021-12-06 17:51:41,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 39 states have internal predecessors, (69), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 17:51:41,246 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2021-12-06 17:51:41,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 17:51:41,247 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:41,247 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:41,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (67)] Ended with exit code 0 [2021-12-06 17:51:41,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (68)] Ended with exit code 0 [2021-12-06 17:51:41,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:51:41,648 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:51:41,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:41,649 INFO L85 PathProgramCache]: Analyzing trace with hash 900848875, now seen corresponding path program 1 times [2021-12-06 17:51:41,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:51:41,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2034806645] [2021-12-06 17:51:41,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:41,651 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:51:41,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:51:41,653 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:51:41,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2021-12-06 17:51:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:41,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-06 17:51:41,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:41,918 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 [2021-12-06 17:51:42,112 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:51:42,112 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 [2021-12-06 17:51:42,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:51:42,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-12-06 17:51:42,443 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 [2021-12-06 17:51:50,622 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-06 17:51:50,623 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 [2021-12-06 17:51:50,815 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-06 17:51:50,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 36 [2021-12-06 17:51:50,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 47 [2021-12-06 17:51:51,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:51:52,076 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:51:52,076 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 [2021-12-06 17:51:52,456 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-12-06 17:51:52,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 61 [2021-12-06 17:51:52,514 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-12-06 17:51:52,515 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 87 [2021-12-06 17:51:53,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 62 [2021-12-06 17:51:53,596 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-12-06 17:51:53,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 26 [2021-12-06 17:51:53,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 17:51:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:53,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:54,978 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1816 (_ BitVec 1)) (|v_ldv_malloc_#res.base_222| (_ BitVec 32)) (v_ArrVal_1811 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ldv_malloc_#res.base_222| v_ArrVal_1816) |c_ULTIMATE.start_entry_point_~a10~0#1.base|))))))) (not (= (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1811)) (.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|) |c_ULTIMATE.start_alloc_10_#t~mem39#1.offset| |v_ldv_malloc_#res.base_222|)))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (.cse2 (select (select .cse3 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select .cse0 (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2)))) |c_ULTIMATE.start_entry_point_~a10~0#1.base|)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_222|)))))))) is different from false [2021-12-06 17:51:54,983 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:51:54,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2034806645] [2021-12-06 17:51:54,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2034806645] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:54,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [590721082] [2021-12-06 17:51:54,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:54,983 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:51:54,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:51:54,984 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:51:54,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2021-12-06 17:51:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:55,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-06 17:51:55,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:55,291 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 [2021-12-06 17:51:57,988 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:51:57,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 38 [2021-12-06 17:51:58,220 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 [2021-12-06 17:51:58,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:51:58,891 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 29 treesize of output 21 [2021-12-06 17:52:03,382 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-06 17:52:03,382 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 39 treesize of output 41 [2021-12-06 17:52:03,766 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 17:52:03,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-12-06 17:52:03,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 53 [2021-12-06 17:52:05,874 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 [2021-12-06 17:52:10,759 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:52:10,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-12-06 17:52:11,263 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-12-06 17:52:11,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 68 [2021-12-06 17:52:11,330 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-12-06 17:52:11,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 99 [2021-12-06 17:52:12,649 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-06 17:52:12,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 68 [2021-12-06 17:52:13,130 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-12-06 17:52:13,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 26 [2021-12-06 17:52:13,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 17:52:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:13,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:52:13,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:52:13,469 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 52 treesize of output 56 [2021-12-06 17:52:14,120 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1854 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= |c_ULTIMATE.start_entry_point_~a10~0#1.base| (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1854)) (.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|) |c_ULTIMATE.start_alloc_10_#t~mem39#1.offset| |c_ULTIMATE.start_alloc_10_#t~ret40#1.base|)))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (.cse2 (select (select .cse3 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select .cse0 (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2))))))) is different from false [2021-12-06 17:52:14,210 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ldv_malloc_#res.base_225| (_ BitVec 32)) (v_ArrVal_1854 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_225|))))) (not (= |c_ULTIMATE.start_entry_point_~a10~0#1.base| (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1854)) (.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|) |c_ULTIMATE.start_alloc_10_#t~mem39#1.offset| |v_ldv_malloc_#res.base_225|)))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (.cse2 (select (select .cse3 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select .cse0 (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2)))))))) is different from false [2021-12-06 17:52:14,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [590721082] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:52:14,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:52:14,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 47 [2021-12-06 17:52:14,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398417204] [2021-12-06 17:52:14,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:52:14,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 17:52:14,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:52:14,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 17:52:14,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2748, Unknown=11, NotChecked=324, Total=3306 [2021-12-06 17:52:14,216 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 48 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 40 states have internal predecessors, (69), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 17:52:19,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:19,814 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2021-12-06 17:52:19,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 17:52:19,815 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 40 states have internal predecessors, (69), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 47 [2021-12-06 17:52:19,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:19,816 INFO L225 Difference]: With dead ends: 85 [2021-12-06 17:52:19,816 INFO L226 Difference]: Without dead ends: 85 [2021-12-06 17:52:19,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 54 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=329, Invalid=3832, Unknown=11, NotChecked=384, Total=4556 [2021-12-06 17:52:19,817 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 55 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:19,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 614 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 480 Invalid, 0 Unknown, 323 Unchecked, 1.2s Time] [2021-12-06 17:52:19,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-06 17:52:19,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-12-06 17:52:19,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 64 states have (on average 1.1875) internal successors, (76), 75 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 17:52:19,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-12-06 17:52:19,819 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 47 [2021-12-06 17:52:19,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:19,819 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-12-06 17:52:19,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 40 states have internal predecessors, (69), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 17:52:19,820 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-12-06 17:52:19,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 17:52:19,820 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:19,820 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] [2021-12-06 17:52:19,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (69)] Ended with exit code 0 [2021-12-06 17:52:20,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (70)] Ended with exit code 0 [2021-12-06 17:52:20,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:52:20,221 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-12-06 17:52:20,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:20,222 INFO L85 PathProgramCache]: Analyzing trace with hash 395290250, now seen corresponding path program 1 times [2021-12-06 17:52:20,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:52:20,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524944980] [2021-12-06 17:52:20,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:20,224 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:52:20,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:52:20,226 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:52:20,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2021-12-06 17:52:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:20,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-06 17:52:20,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:52:20,530 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 [2021-12-06 17:52:20,755 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-12-06 17:52:20,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 48 [2021-12-06 17:52:20,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:52:20,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:52:21,237 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:52:21,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-12-06 17:52:21,737 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-12-06 17:52:21,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 44 [2021-12-06 17:52:22,005 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-06 17:52:22,005 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-12-06 17:52:22,011 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2021-12-06 17:52:23,173 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:52:23,173 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 [2021-12-06 17:52:24,385 INFO L354 Elim1Store]: treesize reduction 119, result has 15.6 percent of original size [2021-12-06 17:52:24,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 117 treesize of output 75 [2021-12-06 17:52:24,440 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-06 17:52:24,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 44 treesize of output 49 [2021-12-06 17:52:24,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-12-06 17:52:25,564 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 17:52:25,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 67 [2021-12-06 17:52:25,901 INFO L354 Elim1Store]: treesize reduction 33, result has 10.8 percent of original size [2021-12-06 17:52:25,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 46 [2021-12-06 17:52:26,217 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-06 17:52:26,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 56 [2021-12-06 17:52:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:52:26,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:52:28,264 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:52:28,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524944980] [2021-12-06 17:52:28,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524944980] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:52:28,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [295877778] [2021-12-06 17:52:28,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:28,265 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:52:28,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:52:28,266 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:52:28,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa531194-7228-43d6-844d-662a73021219/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2021-12-06 17:52:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:28,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-06 17:52:28,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:52:28,570 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 [2021-12-06 17:52:29,229 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:52:29,230 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 26 treesize of output 33 [2021-12-06 17:52:29,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:52:29,469 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 [2021-12-06 17:52:30,060 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 0 case distinctions, treesize of input 22 treesize of output 14 [2021-12-06 17:52:46,518 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-06 17:52:46,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-12-06 17:52:46,953 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-06 17:52:46,953 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-12-06 17:52:46,959 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 50 [2021-12-06 17:52:48,764 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 7 [2021-12-06 17:52:50,768 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-12-06 17:52:50,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 72 [2021-12-06 17:52:50,822 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-12-06 17:52:50,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 93 [2021-12-06 17:52:52,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 64 [2021-12-06 17:52:52,416 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-12-06 17:52:52,416 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 25 [2021-12-06 17:52:52,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 17:52:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:52,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:52:54,620 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1897 (_ BitVec 1)) (v_ArrVal_1934 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1934)) (.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|) |c_ULTIMATE.start_alloc_10_#t~mem39#1.offset| |c_ULTIMATE.start_alloc_10_#t~ret40#1.base|)))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (.cse2 (select (select .cse3 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select .cse0 (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2)))) v_ArrVal_1897) |c_ULTIMATE.start_entry_point_~a10~0#1.base|))))))))))))))) (_ bv1 1)))) is different from false [2021-12-06 17:52:54,689 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1897 (_ BitVec 1)) (v_ArrVal_1934 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1934)) (.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|) |c_ULTIMATE.start_alloc_10_#t~mem39#1.offset| (_ bv0 32))))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (.cse2 (select (select .cse3 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select .cse0 (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2)))) v_ArrVal_1897) |c_ULTIMATE.start_entry_point_~a10~0#1.base|)))))))))))))))))) is different from false [2021-12-06 17:52:54,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [295877778] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:52:54,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:52:54,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2021-12-06 17:52:54,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198073422] [2021-12-06 17:52:54,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:52:54,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 17:52:54,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:52:54,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 17:52:54,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=3592, Unknown=24, NotChecked=246, Total=4160 [2021-12-06 17:52:54,694 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 51 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 43 states have internal predecessors, (76), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)